Study of the characteristics of high-energy proton-induced gamma ray and neutron emission from materials that imitate surface of planets. Page: 2 of 3
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Study of the characteristics of high-energy proton-induced gamma ray and neutron
emissions from materials that imitate surfaces of planets
Yu.E. Titarenko , V.F. Batyaev E.I. Karpikhini, V.M. Zhivun', A.B. Koldobsky', R.D. Mulambetov,
S.V. Mulambetova', Yu.V. Nekrasov', Yu.V. Trebukhovskiy',
V.V. Dmitrenko3, S.E. Ulin3,
S.G. Mashniks, R.E. Prael5.
Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117259 Moscow, Russia
2 Joint Institute for Nuclear Research, 141980, Dubna, Moscow Reg., Russia
3Moscow Engineering Physical Institute, Kashirskoe Shosse, 31, 115409, Moscow, Russia
4 Waseda University, 3-4-1 Okubo Shinjuku, 169-8555, Tokyo, Japan
5Los Alamos National Laboratory, Los Alamos, NM 87545, USA
A proposed ISTC Project is discussed in the present paper. The proposal is aimed at
experiments to determine the space-energy characteristics of the neutron and gamma ray
emission fields generated by 0.2-0.8 GeV proton irradiation of thick targets composed of various
At present, reliable data on physical properties of secondary radiation from materials
irradiated by intermediate- and high-energy protons for some fundamental and applied
researches in astrophysics, space physics, atomic and nuclear physics, as well as for designing
and operating the latest accelerators are lacking.
The said researches include:
" determination of the elemental composition of planetary surfaces monitored by satellites
capable of recording neutrons and y-rays (orbital spectrometry);
" designing radiation shielding for charged particle accelerators;
" verification and validation of models and codes for high-energy hadron-nucleus interactions.
Orbital spectrometry determines the chemical abundances of planetary surfaces with little or
no atmosphere and provides valuable clues to the origin and evolution of planets.
The y-ray and neutron production in nuclear interaction of high-energy protons with matter
may be simulated using proton accelerators.
Geochemical interpretation of the measurement data on y-radiation from planetary surfaces
need to be additionally verified because none of planetary rock samples have ever been
recovered on the Earth. Therefore, it is very important to simulate the processes of y-ray and
neutron production in nuclear interactions of high-energy galactic and solar cosmic ray protons
using proton accelerators with a view of interpreting spacecraft observation data.
The following basic results are expected be obtained under the proposed Project:
* experimental and calculated data on spatial-energy distributions of secondary y-rays emitted
backward from 0.2 GeV and 0.8 GeV proton-irradiated blocks of bulk (1.5x1.5x1.5 m3)
materials (iron, aluminum, basalt, granite, concrete);
" experimental and calculated data on spatial-energy distributions of secondary neutrons inside
and outside the said blocks obtained with threshold activation detectors (Bi, Au, Co, Al).
" neutron spectral indices near the front surface space of bulk targets with and without water-
The data expected to be obtained under the proposed Project can be used
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Titarenko, Y. E. (Yury E.); Batyaev, V. F. (Vyacheslav F.); Karpikhin, E. I. (Evgeny I.); Zhivun, V. M. (Valery M.); Koldobsky, A. B. (Aleksander B.); Mulambetov, R. D. (Ruslan D.) et al. Study of the characteristics of high-energy proton-induced gamma ray and neutron emission from materials that imitate surface of planets., article, January 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc926222/m1/2/: accessed February 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.