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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Computer program contains an input library of nuclear data for 44 elements and their isotopes to determine the induced radioactivity for gamma emitters. Minimum input requires the irradiation history of the element, a four-energy-group neutron flux, specification of an alloy composition by elements, and selection of the output.
FORTRAN 4 program /P1-GAS/ calculates the P-O and P-1 transfer matrices for neutron moderation in a monatomic gas. The equations used are based on the conditions that there is isotropic scattering in the center-of-mass coordinate system, the scattering cross section is constant, and the target nuclear velocities satisfy a Maxwellian distribution.
Measurements of gamma and neutron dose distributions in core of thermal tungsten nuclear rocket experiment
Report presents resistivity measurements and their interpretation for neutron-irradiated pure metals and Al-Zn alloys. The influence of temperature, the role of point defects, and the aging behavior on resistivity are considered. The experimental procedures and results are discussed in detail.
Study of detection sensitivities of 73 radioactive elements using fast unmoderated neutrons includes experiments for irradiation, cooling and counting conditions. The gamma ray emission spectra is used to identify the unknown material.
Study considers problems encountered in using 4 pi-recoil counters for neutron spectra measurement. Emphasis is placed on calibration, shape discrimination, variation of W, the average energy loss per ion pair, and the effects of differentiation on the intrinsic counter resolution.
Mathematical models for IBM 7094 computer program prediction of neutron induced activation
Comparison of absolute calculated and measured gamma and neutron doses in tungsten water- moderated critical assembly
Thermal, and vibrational energy calculations for neutron star during supernova explosion
Intranuclear cascade calculations of 0.75, 1, and 2 GeV protons and 1 GeV neutrons on oxygen, aluminum, and lead tabulated
Fast and thermal neutron flux measurements in test cavity outside HB-6 beam port in Plum Brook reactor using sulfur pellets and gold foils
Identification of neutron stars by hydrogen and helium spectral line observations
Neutron radiation effects on tensile, creep, fatigue, impact, and hardness properties of reactor materials
Pulse height and pulse shape data telemetered from sounding rocket flight of directional neutron detector
Neutron gamma activation methods for determining chemical composition of soil samples
Computerized method using combined codes for neutron spectra evaluation in thermal reactors
Ages for D-D and D-T neutrons in water and tungsten-water mixtures