Los Alamos Technical Reports This file lists the Los Alamos Technical Reports numbered LA-1 through LA-999 in the Los Alamos Library online catalog. The text of many of these reports are available online. Access the Los Alamos Library catalog by telnetting to "library.lanl.gov" without the quotes. Compiled by Gregory Walker, gwalker@netcom.com. For more information on nuclear weapons, visit Trinity Atomic Web Site at http://www.envirolink.org/issues/nuketesting/ LA-1 The Los Alamos primer : the first lectures on how to build an atomic bomb LA-1 A Los Alamos primer LA-3 Experimental program notes (from discussions on 4/21-24/43) LA-5 Integral diffusion problems LA-6 Theoretical group organization LA-7 Theoretical group program LA-8 Integral treatment of neutron diffusion LA-9 Range measurements of 94[sup 239], 94[sup 238] and U[sup 233] LA-10 The exponential shock and rarefaction waves LA-11 Los Alamos handbook of nuclear physics LA-12 The Range of deuterons in heavy water and of proton in hydrogen LA-12-R The Range of deuterons in heavy water and of proton in hydrogen LA-13 Piling up of counts LA-14 The exponential shock and rarefaction waves LA-15 Estimation of small quantities of uranium in thorium LA-16 Capture cross sections for 240 Kev neutrons of gold, rhenium and uranium LA-17 Fission spectrum LA-18 The collapse of hollow steel cylinders by high explosives LA-19 The use of thorium as a threshold detector for fast neutrons LA-20 High-density alloys of rare earths LA-21 Fission cross section of 94[sup 239] for 220 Kev neutrons and Ra plus Be neutrons LA-23 One-dimensional motion of a detonated explosive LA-25 Measurements of [nu][sub 49]/[nu][sub 25] LA-27 Preparation and properties of some gold alloys LA-28 Measurements on [sigma][sub f](49)/[sigma][sub f](25) and the value of [sigma][sub f] as a function of neutron energy LA-31 The multiplication rate for untamped cylinders LA-33 Preparation of compacts of high-density uranium hydride LA-35 Progress report on metal reduction, October 1943 LA-37 The Formation of uranium hydride LA-38 The Production of slow neutrons in a carbon block LA-39 Measurements of [alpha][sub f](02)/[alpha][sub f](28) and the value of [alpha][sub f](02) as a function of neutron energy LA-40 Progress report on metal reduction, November 1943 LA-42 Uranium alloy development LA-44 Uranium alloy development, Part 2 LA-45 Geometrical formulas for experiments on single scattering LA-46 A comparison of boron and 25 fission cross-section for neutrons of energies from thermal to 3 Mev LA-47 Critical size and multiplication number for untamped rectangular block by variation method LA-48 The Neutron spectrum of boron bombarded by polonium-alphas LA-49 The Modification of the spectrum of D-D neutrons by passage through 5 [inches] of tuballoy LA-52 RaD purification, Po preparation, and calibration of measuring apparatus LA-53 METHODS OF TREATMENT OF DISPLACEMENT INTEGRAL EQUATIONS LA-53-A Methods of treatment of displacement integral equations : recipe book LA-54 Progress report on metal reduction, December 1943 LA-55 Uranium alloy development, Part III LA-56 A Method of making thin uranium oxide films on platiunum foils LA-58 The determination of the oxygen content of metals by the carbon monoxide method LA-60 The Fission neutron spectrum of 25 LA-61 Progress report on metal reduction, January 1944 LA-62 The Transport cross section of helium for fast neutrons LA-63 Ultramicrochemical investigation of the solubilities of some plutonium compounds LA-64 Stopping power of various substances for fission fragments LA-65 Characteristics of metal type electron-multiplier tube LA-66 The energies of the neutrons from polonium alphas on boron LA-67 Progress report on reduction by electrolysis LA-68 Uranium alloy development, Part 4 LA-69 Uranium alloy development, Part 5 LA-71 A spectrographic method for the determination of fluorine LA-72 Polonium extraction using a platinum electrode and hydrogen LA-73 The Multiple-wire proportional counter (the M. W. counter) LA-74 Investigation of proportional counters LA-75 Purification of plutonium LA-76 Delayed neutrons from 49 LA-78 Uranium alloy development, Part VI : uranium-moly- bdenum alloys LA-79 Metallography of plutonium LA-81 Inelastic scattering in uranium LA-82 Fission cross section of 25 for 0.01 to 1000 eV neutrons LA-84 Fission neutron spectra of 25 and 49 LA-85 Po alphas on BF[sub 3] as a mock fission neutron source LA-86 Spontaneous fission in separated uranium isotopes LA-87 Long range alpha particles emitted in connection with fission : preliminary report, May 18, 1944 LA-88 Application of microwaves to interior ballistic measurements LA-89 The preparation of thin films of thorium oxide LA-91 Measurements on the cross-section of 49 as a function of neutron energy in the range from 0.01 eV to 3.0 eV LA-92 Boron cross-section for neutrons from 0.01 to 1000 eV LA-93 Gold cross section for neutrons from 0.01 to 0.3 eV LA-95 The preparation of thin boron films LA-96 Uranium alloy development, Part VII : uranium alloys with two atomic per cent of some rare and precious metals LA-97 Some remarks on the hydrodynamical theory of wave propagation with an application to a problem in the flow of metals incompressible at low pressures LA-98 Determination of rare earth elements in uranium compounds LA-99 Oscilloscope sweep circuit and delay line for the study of transients LA-100 Fission and radiative capture cross section of 25 for thermal neutrons LA-101 Statistical fluctuations in the water boiler and the dispersion of neutrons emitted per fission LA-102 Number of neutrons per fission for 25 and 49 LA-103 The ratio of the fission cross sections of 49 and 25 for thermal neutrons and dthe ration [1 + [alpha](49)]/[1 + [alpha](25)] LA-104 Neutrons per fission from 49 compared with 25 : slightly delayed neutron from 49 and 25 LA-105 Tamper tests on water boiler LA-107 Note on a use of delay lines in counter pulse amplifiers LA-108 Boron trifluoride neutron detector for low neutron intensities LA-110 Lead sphere integral experiment LA-111 Energy spectrum of Po-Be neutrons LA-112 The preparation of plutonium trichloride LA-114 Pulse height analyzer - model A LA-115 Time of collection of electrons inionization chambers LA-116 The preparation of plutonium tribromide LA-117 Capture cross section of gold as a function of neutron energy LA-120 The equation of state of hydrogen from one to a million atmospheres pressure LA-121 Operation of proportional counters at pressures above atmospheric LA-122 Vapor pressure of plutonium trichloride LA-123 Spherical proportional counter LA-124 The preparation of plutonium metal on the one-gram scale by means of the graphite centrifuge LA-126 Radiation hazards connected with the controlled hydride explosion LA-127 The consolidation of boron LA-128 Absolute values of the fission cross sections of 25 and 28 from 0.28 to 2.50 Mev LA-129 Efficiencies of neutron counters using recoils of protons in argon and xenon LA-132 Construction and operation of pulsed counter tubes LA-134 Water boiler LA-136 Thick-target excitation functions for alpha particles LA-137 Plutonium hydride and deuteride LA-138 Equations of state of helium, argon and xenon up to a megabar pressure LA-139 The preparation of plutonium metal by the reduction of the oxide with graphite LA-141 Recovery and purification of plutonium LA-142 An equation of state in the condensed phase for arbitrary pressures and moderate temperatures LA-144 Effect of anisotropic scattering on critical-mass calculations LA-145 The x-ray spectra of the last-row elements LA-147 Production of uranium by electrolysis of fused salts LA-148 Production of plutonium by electrolysis LA-149 Preparation of UF[sub 6] for isotopic analysis LA-150 The cross sections for fission of 25, 49, 28, 11, 37, 00, 02, B and Li LA-151 Plastic bonding of boron powder LA-152 Distribution and power measurements in the water boiler LA-153 Determination of oxygen by the vacuum fusion method LA-154 Some observations on the basic chemistry of plutonium LA-156 Ionization chamber and electronic equipment for the observation of the shape of one microsecond x-ray pulses LA-158 Further measurements of the fission and absorption cross sections of 25 below 1000 Ev LA-159 Production of uranium tetrafluoride on a 200-gram scale LA-160 Experimental determination of the diffusion length for C neutrons in BeO LA-163 Measurement of [gamma][sub f](28), [gamma][sub f](25)/[gamma][sub f](28) and [gamma][sub f](49)/[gamma][sub f](25) at 2.5 and 3 Mev LA-165 Shock hydrodynamics LA-166 A recoil proportional counter LA-168 Isotopic constitution of plutonium : I LA-169 Study of the scattering of 25 LA-170 Investigation of fission gamma rays LA-171 Theory of multiplicative processes : I LA-172 Decomposition products of plutonyl nitrate and plutonium oxalate LA-173 Formula for the critical radius for one velocity LA-174 The spherical-harmonic method and its application to one-velocity neutron problems LA-175 Plutonium recovery methods LA-176 Measurement of weak neutron intensities by Szilard-Chalmers reaction in calcium permanganate solution LA-179 Capture cross section of U[sup 238] for neutrons of various energies LA-180 Uranium alloy development, Part VIII : compression and tension tests on uranium and some uranium-mol- ybdenum alloys LA-181 Tuballoy grain-size standards LA-182 Contact electrical method of studying implosion LA-183 Criticality of the water boiler, number of delayed neutrons, and dispersion of the neutron emission per fission LA-183A Criticality of the water boiler, number of delayed neutrons, and despersion of the neutron emission per fission LA-184 Primacord velocity measurements LA-185 The ratio of [nu]23/[nu]25 : slightly delayed neutrons from 23 LA-188 Fission cross section of 23 from 30 Kev to 3 Mev LA-189 Multiplication of fission neutrons in a sphere of 25 LA-190 Relative fission cross section of 23 for neutrons in the range .025 to 100 ev LA-191 Multiplication of a 2-1/2 inch 25 sphere as measured with 28 and 25 fission detectors LA-193 Large-scale preparation of the anhydrous fluorides of plutonium LA-195 Formation of jets in plane slabs LA-197 Theory of an untamped subcritical sphere with a surface source LA-198 Production of hemispheres of uranium and 25 by hot pressing LA-200 Neutron spectrum for fast fission of 25 LA-201 Compact mock fission neutron sources LA-202 Termination of primacord with pressed-PETN gilding-metal caps LA-203 Half-life of 24. I. mass-spectrographic studies of normal tuballoy LA-204 Flotation of uranium oxides LA-205 Comparison of the variation-theory and end-point results for tamped spheres LA-206 A simplified method for calculating critical sizes LA-207 Neutron absorption method for boron analysis LA-211 Radioactive threshold detectors for neutrons LA-213 Taylor's hydrodynamics of strong shocks applied to gases having small values of [gamma]-1 LA-214 Effect of voids on detonation waves LA-215 Gravity waves in water caused by explosions LA-217 Use of gadget in rain or fog LA-221 Propagation of detonation waves along the LA-222 Theory of neutron counters using proton recoils from paraffin LA-223 Quasi-stationary field in a moving conductor with applications to collapsing spherical shells LA-224 Primacord branching LA-225 Preparation of a compact radioyttrium gamma-ray source LA-226 Half-life of 24. II. studies of enriched materials LA-228 Gravity waves generated by the creation of a cylindrical cavity in water LA-229 Opacity of air, BeO, C, Fe, and U at high temperatures LA-231 Delayed neutrons from 49 LA-232 The fission cross section of 37 LA-233 Hot pressing of solid plutonium hemispheres LA-234 A graphical representation of critical masses and multiplication rates LA-236 Dynamics of a mass of hot gas rising in air LA-237 Microdetermination of azide by a Kjeldahl procedure LA-240 A report on the hyperfine structure in the arc spectrum of tuballoy LA-241 Water tamper measurements LA-242 The similarity solution for a convergent spherical shock wave near zero radius LA-243 Scattering properties of boron LA-247 Multi-medium critical-mass problem LA-251 Effect of reaction zone on detonation velocity LA-252 Delayed neutrons from 25 after short irradiation LA-253 Short-period delayed gammas from fission of 25 LA-256 Total cross sections of U, H and C from 35 to 500 Kev LA-257 Distribution arising from a point source of fast neutrons between two slowing-down media LA-258 The mathematical development of the end-point method LA-259 Condenser-microphone method of studying motion of conducting surfaces LA-260 Energy of inelastically scattered neutrons in a large mass of tuballoy LA-262 Effect of variable entropy in the theory of spherically convergent detonation waves LA-266 Absorption and fission cross sections of 49 in the neutron energy range 0.01 ev to 100 ev LA-267 Multiplication of neutrons in small spheres of active material LA-268 Treatment of anisotropic scattering by hydrogen in multiplying systems LA-269 Resonance autocatalysis LA-271 Effect of rigidity on shock waves in solids LA-272 Critical mass of a water-tamped 49 solution LA-274 Evaluation of scattering data LA-276 Capture and inelastic scattering in spheres of various metals. 1. transmission experiments with long counters 2. inelastic scattering of Y-Be neutrons LA-281 Recording dosimeters for one microsecond x-ray pulses LA-282 Radioactivity measurements at the 100-ton trial LA-282A 100-ton test : radiation above the crater after 41 days LA-283 100-ton-test : permanent earth movement; earth and air shocks LA-284 100-ton test : mechanical impulse meter LA-285 100 - ton test meteorological report LA-286 100-ton test : piezo gage measurements LA-287 100-ton test at Trinity : report on earth velocity measurements LA-288 100-ton test : box gauges for blast pressures LA-290 100-ton test : radiochemistry LA-291 100-ton test : measurement of the velocity of sound LA-292 The motion of earth thrown from small craters by explosive charges LA-295 Preparation of refractories of magnesium oxide LA-296 Opacity and thermodynamic properties of air at high temperatures LA-299 Stability of a steady plane shock LA-303 Spectrophotometric determination of sub-microgram amounts of boron LA-304 Integral experiments I : tamper reflection and distributions LA-304A BeO tamper reflections and distributions LA-306 Integral experiments III : comparison of U and WC for tampers LA-309 Summary of known critical masses of 25 and 49 LA-311 On the Milne problem for a large plane slab with constant source and anisotropic scattering LA-312 The 2 ev resonance in the absorption of 25 LA-313 Protection of uranium against atmospheric oxidation LA-314 Protection of plutonium against atmospheric oxidation LA-315 Determination of density from opacity measurements LA-316 Estimated blast pressures from TNT charges of 2 to 10,000 tons LA-318 Approximate treatment of exponential shock and rarefaction waves LA-327 Isotopic constitution of plutonium: II LA-331 Shock and material velocities in several metals and nonmetals LA-332 Theory of von Neumann's method of treating shocks LA-334 Transport phenomena in a mixture of electrons and nuclei LA-335 The definition of "neutron multiplication" LA-337 Slowing down of neutrons in air LA-340 Colorimetric determination of boron in plutonium metal LA-347 Calorimetric determination of the energy produced by 49 LA-350 July 16th shot : blast measurements with peak-pressure indicators LA-351 July 16th nuclear explosion : geophone measuremen- ts of earth motion LA-352 July 16th nuclear explosion : sound velocity and excess velocity of the shock wave LA-353 July 16th nuclear explosion : total radiation LA-354 July 16th nuclear explosion : box-gauge measurement of blast pressure LA-355 July 16th nuclear explosion : mechanical impulse gauge LA-357 July 16th nuclear explosion : meteorological report LA-358 July 16th nuclear explosion : soil correction, absorption of neutrons in soil, and time dependence of slow-neutron intensity LA-359 July 16th nuclear explosion : radiation survey of Trinity site four weeks after explosion LA-360 July 16th nuclear explosion : micro-barograph pressure measurement LA-362 July 16th nuclear explosion : neutron measurements with gold-foil detectors LA-364 July 16th nuclear explosion : incendiary effects of radiation LA-365 July 16th nuclear explosion : permanent earth displacement LA-365A July 16th nuclear explosion : examination of tower footing LA-366 July 16th nuclear explosion : blast measurements with condenser gauges LA-368 Boron-lead compacts LA-369 The disintegration cross section of netrogen for fast neutrons LA-373 Variation in [gamma](25) and [gamma](49) with energy of the incident neutrons LA-376 Determination of plutonium in human feces LA-380 Fabrication of plutonium foil by distillation of the metal LA-380R Fabrication of plutonium foil by distillation of the metal LA-381 Equilibrium constants and heats of reaction for the hydrofluorination of uranium dioxide and plutonium dioxide LA-383 Electronic timing methods for use in high-explosi- ve research LA-384 Pressure, compression, shock and particle-velocity measurements in the neighborhood of one-third megabar : progress report to August 15, 1945 LA-386 Spectrochemical analysis of plutonium and its compounds. I, the copper spark method LA-387 Spectrochemical analysis of plutonium and its compounds, II. Cupferron procedure LA-390 Confinement of an explosion by a steel vessel LA-391 Chemistry and metallurgy health handbook of radioactive materials LA-393-A Equation of state of a compressed metal according to the Thomas-Fermi-Dirac model LA-393A Equation of state of a compressed metal according to the Thomas-Fermi-Dirac model LA-394 High-power water boiler LA-395 Some factors affecting the cupferron extraction procedure for estimation of trace amounts of plutonium LA-396 Calibration of cadmium-covered gold foils in a graphite block LA-397 Controlled production of an explosive nuclear chain reaction LA-399 Theory of water-tamped water boiler LA-400 Absolute calibration of Ra-Be neutron source LA-402 Neutron multiplication in spheres of 25 LA-403-Del. Plutonium purification in building D LA-404 Chemical research : Building D plutonium purification LA-405 Purification processes : D-building plutonium purification LA-406 Building D plutonium purification : (summary of results) LA-407 Engineering development building "D" plutonium purification report LA-408 Building D plutonium purification : corrosion data LA-409 Building D plutonium purification : equipment drawings LA-412 Chemical and metallurgical operations involved in the fabrication of U-235 for use in nuclear weapons : Part 3. Reduction of uranium tetrafluor- ide to metal LA-414 Chemical and metallurgical operations involved in the fabrication of U-235 : Part 5. production of magnesia refractories for casting of Uranium-235 LA-416 Chemical and spectrochemical analysis of uranium and plutonium materials : manual of procedures LA-416-A Chemical and spectrochemical analysis of uranium and plutonium materials : manual of procedures LA-418 Detection of nuclear-explosion dust in the atmosphere LA-420 Spiral fission chambers LA-421 Neutron distributions in tamped 25 assemblies II : 4-1/2" core of 25 metal LA-425 Microgravimetric determination of gallium in plutonium-gallium alloys LA-427 Range of 25 fission fragments in photographic emulsion LA-429 Micro combustion method for the determination of carbon LA-430 July 16th nuclear explosion : attempt to obtain gamma-ray kinephotographs LA-431 July 16th nuclear explosion : measurement of maximum blast pressure near the center LA-433 July 16th nuclear explosion : measurement of delayed ionization by distant recording instruments LA-435 July 16th nuclear explosion : relay timing LA-436 July 16th nuclear explosion : fast electronic timing sequence LA-438 July 16th nuclear explosion : ground vibrations LA-439 100-ton test : ground vibrations LA-442 Critical mass measurements for a 25 sphere in Tu and WC tampers LA-443 Building D plutonium recovery processes LA-444 Measurement of the slow-neutron fission cross section of Pu[sup 240] LA-445 Fission cross sections by the Be[sup 7] and Mn-bath methods LA-446 Specific alpha activity of plutonium LA-447 Fission cross section of uranium 235 from 20 to 500 Kev LA-448 Cloud-chamber effect in large explosions LA-449-Del. Solution of some stationary neutron diffusion problems in spherical media with radially varying density LA-462 Microvolumetric assay of uranium LA-463 Oxidation of tracer amounts of plutonium by perchloric acid LA-465 On the theory of neutron multiplication LA-466 Electric and thermal behavior of completely ionized deuterium in presence of a magnetic field LA-467 Capture cross sections of several substances for neutrons of various energies LA-468 Energy of neutrons from MsTh-D, La-D, Y-Be, and Sb-Be photo-neutron sources LA-469 Radioassay of plutonium LA-470 Dependence of reactivity of the water boiler on the mass of 25 in the sphere LA-471 Relative effectiveness of delayed neutrons in the waterboiler LA-472 Preparation of uranium metal by the bomb method LA-473 Preparation of plutonium metal by the bomb method LA-481 Asymptotic method of solving neutron-diffusion problems LA-482 Integrating polonium meter LA-484 Theory of ion chambers LA-485 Ratio of the thermal fission cross sections of 23 and 25 LA-486 Methods for measuring fast decay of a near-critic- al assembly LA-487 A method for determining equations of state and reaction zones in detonation of high explosives, and its application to pentolite, composition-B, baratol, and TNT LA-488 Alpha counters as used inradioassay of plutonium LA-489 Hydrogen peroxide as a reagent in plutonium recovery LA-490 Futher investigation of spontaneous fission in plutonium LA-491 Average number of neutron emitted per spontaneous fission by Pu[sup 240] LA-493 Graphical method of obtaining critical masses of water-tamped water boilers LA-494 Developement of gamma-phase hot-pressing of uranium LA-495 Metallographic preparation and structure of plutonium and some plutonium alloys LA-501 Properties of pultonium alloys LA-502 Dilatometric studies on the allotropic transforma- tions of plutonium LA-505 Continuous purification of hydrogen and argon-hydrogen gas mixtures LA-506 Transmission of gama rays through spheres of scattering material LA-507 Microvolumetric assay of plutonium LA-509 Gamma radiation dosage at Hiroshima from recovered photosensitive material LA-510 Mass ratios and energy release in the fission of U[sup 235], U[sup 233] and Pu[sup 239] by thermal neutrons LA-511 Determination of the number of fission in two irradiated samples of U[sup 235] LA-512 Capture cross section of U-235 for pile neutrons LA-514 Snouting and focusing the cyclotron beam LA-515 Absolute (n, p) cross section of sulfur LA-519 Slugulation during explosion due to Taylor instability LA-520 Fission cross sections of 02, 23, 25, 28, 49, B[sup 10] and Li[sup 6] LA-522 Induced currents in a hemispherical shell LA-524 The calculation of critical masses including the effects of the distribution of neutron energies LA-525-Del. Ignition of deuterium-tritium mixtures : numerical calculations using the ENIAC LA-526 Method of measuring the drift velocity of electrons in gases LA-527 Time for fission LA-531 July 16th nuclear explosion : space-time relationships LA-536 Half-life determination of artificially induced activities LA-537 Recovery of enriched uranium from reduction residues LA-538 Electrical resistance method of measuring the velocity imparted to metals by high explosives LA-539 Absolute yield of delayed neutrons from plutonium fission, with fast-neutron excitation LA-541 Counter for use in scattering and disintegration experiments LA-542 Scattering by helium of neutrons from 0.6 to 1.6 Mev LA-543 Apparatus for rapid analysis of boron 10 LA-544 Fission products : 25 - minute samarium 155 LA-545 Underwater explosion of a nuclear bomb LA-546 Fast-neutron distribution : two infinite plane slowing-down media with point source inone medium LA-548 Sweeping of radioactive gases from a homogeneous pile, April 11, 1946 LA-549 Metabolism of plutonium in the rat LA-550 Cross-roads handbook of explosion phenomena LA-551-Del. Prima facie proof of the feasibility of the super LA-552 Preparation of a mock fission neutron source LA-554 Measurement of neutron fluxes in the region 30 to 500 Kev with proportional counters LA-555 Neutron experiments with beryllium spheres LA-556 Cloud-chamber and photoplate measurements of the fission-neutron spectrum of 49 LA-557 LA - 140 gamma-ray sources LA-558 Directional properties of fission neutrons LA-561 Isotopic constitution of plutonium : Part 3 LA-562 Fission cross section of uranium 235 for 25-kilovolt neutrons LA-564 Penetration of gamma rays through thick targets LA-570 Theoretical calculations for integral tamper experiments LA-571 Neutron diffusion : spherical harmonics theory LA-574 Gravity waves generated by surface and underwater explosions in shallow water LA-575-Del. Report of conference on the super LA-576 High-speed x-ray apparatus LA-577 Formation and rise of smoke clouds from explosions LA-581 Low-energy cross section of the D-D reaction and angular distribution of the protons emitted LA-582 Low-energy cross section of the D-T reaction and angular distribution of the alpha particles emitted LA-583 "Loading Pit" manual : second printing LA-586 Equation of state of high explosive and calulation of detonation waves LA-587 Spalling of metal plates LA-588 July 16th, 1945 nuclear explosion : preliminary report on the spectrum and radiation LA-589 Fabrication of refractory shapes LA-591-Del. Statistical behavior of neutron chains LA-593 Amplifier response LA-594 IBM approximation method for free-surface problems LA-596 Efficiency for very slow assembly LA-602 Ignition of the atmosphere with nuclear bombs LA-603 Neutron diffusion in a space lattice of fissionable and absorbing materials LA-604 Physical properties and crystal structure of polonium LA-606 Slow-neutron disintegration of boron-10 : search for the formation of Be(10) and estimate of the mean life of Be(10) LA-607 ([alpha],n) cross-sections of beryllium, magnesium and aluminum LA-608 A theorem and its application to finite tampers LA-609 Critical dimensions of water-tamped slabs and spheres of active material LA-611 Energy distribution of the fragments resulting from the fission of U[sup 235] by slow and by fast neutrons LA-612 Gamma-ray counter for the measurement of polonium source intensity LA-615 The Mark IV ballastic program LA-617 Time scale measurements by the Rossi method LA-618 Critical masses of enriched uranium hydrides and some related measurements LA-621 Shock-induced luminosity and its application to flash photography LA-622 A neutron detector having uniform sensitivity from 10 Kev to 3 Mev LA-626 Nuclear explosion 16 July 1945 : health physics report on radioactive contamination throughout New Mexico following the nuclear explosion LA-628 Properties of 86s I(136) LA-629 Half-life of tritium LA-630 Neutron absorption cross sections of radioactive La[sup 140], Ba[sup 140], and two stable C[sub 0] isotopes LA-631-Del. Preparation and operational plan of medical group (TR-7) for nuclear explosion 16 July 1945 LA-637 Neutron cross sections of U[sup 235] and Pu[sup 239] at low energies LA-639 Thermal analysis of plutonium LA-640 Plastic bonding of various materials LA-646 Cross sections for gamma ray processes LA-647 Methods of opacity calculations LA-650 Opacity of solar material LA-652 On the two inverse reactions H[sup 3](p,n)He[sup 3] and He[sup 3](n,p)H[sup 3] LA-654 Studies on the scattering of neutrons by protons LA-656 Thermodynamic functions for tritium and tritium hydride : the equilibrium of tritium and hydrogen with tritium hydride : the dissociation of tritium and tritium hydride LA-657 On the numerical solution of partial differential equations of parabolic type LA-658 Organization and function of the CMR-contaminated clothes laundry LA-659 Ranges in air and mass identification of plutonium fission fragments LA-660 The ([alpha],n) cross section of boron LA-661 Thermal conductivity of stabilized [alpha]-phase plutonium LA-663 Integral diffusion kernel for a cylinder LA-671 Proposed numerical method for calculation of shocks LA-672 Neutron density, point source and plane source LA-673 Upper limits of the fission cross sections of bismuth, lead, mercury, gold, iridium and tungsten for 14 Mev neutrons LA-683 Multiplicative systems in several variables, 1 LA-685 Production of MgO crucibles used at Los Alamos LA-686 Estimation of slow neutron dosage in whole body irradiation LA-687 Radiation doses in the Pajarito accident of May 21, 1946 LA-687(Tentative) Radiation doses in the Pajarito accident of May 21, 1946 LA-688 He[sup 3] isotopic abundance measurement by counter technique LA-689 Comparison of PoBe neutron source number P-2 "blue" to the standard RaBe source number 44 by integration of the indium resonance activity throughout the standard graphite pile LA-690 Multiplicative systems in several variables, 2 LA-691 On the application of neutron techniques to the experimental investigation of the low temperature properties of He[sup 3] or He[sup 4]-He[sup 3] systems LA-695 Assay of uranium tetrafluoride LA-696 Colorimetric determination of boron in beryllium metal and beryllium oxide LA-697 Fast neutron distribution in uranium LA-699 Proposed numerical method for calculation of shocks, 2 LA-701 Thermodynamic functions for tritium deuteride : dissociation of tritium deuteride : equilibria among the isotopic hydrogen molecules LA-702 Further studies on the scattering of neutrons by protons LA-703 Determination of nickel, iron and chromium in mercury LA-705 Study of the interaction of protons with tritium LA-706 Relative sensitivities of some organic compounds for scintillation counters LA-707 Multiplicative systems in several variables, III LA-707 Multiplication systems in several variables, 3 LA-710 Neutron fission cross secion of U[sup 238] in the region of neutron energy between 6 and 9 Mev LA-712 A classical treatment of electrostatic excitation of nuclear P[sub 2] vibrations LA-715 A study of the spectrum of neutrons of low energy from the fission of U[sup 235] LA-718 Energy spectrum of neutrons from fissions induced by thermal neutrons LA-719 The fission cross section of U[sup 238] for 14 Mev neutrons LA-720 Fabrication of U[sup 235] discs for the General Electric power pile LA-721 The total cross section of the He[sub 3] nucleus for slow neutrons LA-723 The Conservation of energy and momentum in nuclear reactions LA-725 Thresholds for the photo-disintegration of Zr[sup 90], Pr[sup 141], As[sup 75], I[sup 127], Ni[sup 58], and La[sup 138] LA-726 Relative photofission cross sections of several fissionable materials LA-729 On some possible magnetic properties of liquid He[sub 3] : preliminary communication LA-731 The determination of equation of state data from measurements in shocks LA-733 A note on the correction of Ra La transmission curves LA-734 Equation of state of aluminum at high temperatures LA-735 A Modified decade scaler : final report on project authorization number CMR-3-5 LA-736 Fabrication of hollow spheres of uranium : section 1, mold design and casting procedure; section 2, spherical magnesia cores LA-738 A combustion method for the determination of carbon in calcium metal LA-739 Effect of plutonium on colorimetric iron analysis LA-740 Inelastic collison cross sections of various elements for 14 Mev neutrons LA-741 Report on the petrographic examination of local soils LA-742 The preparation and reduction of divinylacetylene LA-743 Height of burst for atomic bombs LA-743R Height of burst for atomic bombs LA-744 Time scale measurments by the Rossi method LA-745 Optical and morphological crystallography of plutonium compounds LA-746 The Cu[sup 63](n,2n)Cu[sup 62] cross section as a function of neutron energy near the threshold LA-747 Angular distribution of 10.8 Mev deuterons scattered by deuterons LA-748 Cross section as a function of angle for the D(d,n)He[sup 3] reaction for 10 Mev bombarding deuterons LA-749 Polythene - 25 critical assembly and neutron distribution studies LA-750 Symmetrical tripartition of U[sup 235] by thermal neutrons LA-753 Portable fast-neutron fission-chamber monitor LA-755 Fission cross section of U[sup 238] in the neighborhood of 7 Mev LA-756 Serber-Wilson method formulae and computation methods LA-980 Differential cross section as a function of angle for the D(d,p)T reaction for 10.9 Mev bombarding deuterons LA-981 Differential cross section of the reaction He[sup 3](d,p)He[sup 4] at 10.2 Mev bombarding energy and search for excited state of He[sup 4] LA-990 Neutron diffusion theory : integral theory methods and formulae LA-994 Summary of fast fission cross sections