منابع مشابه
Nuclear cross sections for gamma ray deexcitation line production by secondary neutrons in the Earth’s atmosphere
[1] Interactions of galactic cosmic rays and solar energetic particles with nuclei in the Earth’s atmosphere produce secondary neutrons. Secondary neutrons with energies greater than a few MeV interact with atmospheric nuclei and produce gamma ray lines. The relative intensities of these lines depend on the shape of the neutron energy spectrum, and so their measurement with satellite detectors ...
متن کاملTotal cross sections for ultracold neutrons scattered from gases
S. J. Seestrom,1 E. R. Adamek,2 D. Barlow,1 M. Blatnik,1 L. J. Broussard,1 N. B. Callahan,2 S. M. Clayton,1 C. Cude-Woods,2 S. Currie,1 E. B. Dees,4 W. Fox,2 M. Hoffbauer,1 K. P. Hickerson,5 A. T. Holley,2,3 C.-Y. Liu,2 M. Makela,1 J. Medina,1 D. J. Morley,1 C. L. Morris,1 R. W. Pattie, Jr.,1 J. Ramsey,1 A. Roberts,1 D. J. Salvat,1,2 A. Saunders,1 E. I. Sharapov,6 S. K. L. Sjue,1 B. A. Slaughte...
متن کاملDose equivalent from 500 MeV neutrons
Neutrons constitute a major component in the radiation fi eld outside the shielding of particle accelerators. Consequently appropriate neutron dose meters are needed to survey the radiation levels. A thermo-luminescence based neutron dosemeter is used at the UNILAC as well as at the SIS. It has been modifi ed to improve the response for high energetic neutrons (extended range). We report on a t...
متن کاملNucleon-Nucleon Cross Sections in Nuclear Matter
We provide a microscopic calculation of neutron-proton and neutron-neutron cross sections in symmetric nuclear matter at various densities, using the Brueckner-Hartree-Fock approximation scheme with the Paris potential. We investigate separately the medium eeects on the eeective mass and on the scattering amplitude. We determine average cross sections suitable for application in the dynamical s...
متن کاملBenchmarking GEANT4 nuclear models for carbon-therapy at 95 MeV/A
In carbon-therapy, the interaction of the incoming beam with human tissues may lead to the production of a large amount of nuclear fragments and secondary light particles. An accurate estimation of the biological dose deposited into the tumor and the surrounding healthy tissues thus requires sophisticated simulation tools based on nuclear reaction models. The validity of such models requires in...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1950
ISSN: 0031-899X
DOI: 10.1103/physrev.77.606