Experimental and Theoretical Research on the Angular Distribution of Neutrons Produced in 7Li(p, n)7Be Reactions during the Interaction of Intense Laser Pulses with Solid Targets

被引：3

作者：

Demchenko, N. N. ^{[1
]}

Belyaev, V. S. ^{[2
]}

Matafonov, A. P. ^{[2
]}

Zagreev, B. V. ^{[2
]}

Kedrov, A. Yu. ^{[2
]}

Letyagin, A. A. ^{[2
]}

Lobanov, A. V. ^{[3
]}

Krainov, V. P. ^{[4
]}

机构：

[1] Russian Acad Sci, Lebedev Phys Inst, Fed State Budgetary Sci Inst, Leninskii Pr 53, Moscow 119991, Russia

[2] Cent Res Inst Machine Bldg, Fed State Unitary Enterprise, Pionerskaya Ul 4, Korolev 141070, Moscow Oblast, Russia

[3] Ltd Liabil Co Sci & Tech Assoc IRE Polus, Fryazino 141190, Moscow Oblast, Russia

[4] Natl Res Univ, Moscow Inst Phys & Technol, Inst Skii Per 9, Dolgoprudnyi 141700, Moscow Oblast, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2019年 / 129卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

ACCELERATION; GENERATION; EXCITATION; EMISSION; PROTONS;

D O I：

10.1134/S1063776119090024

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Experiments to measure the angular distribution of neutrons produced in Li-7(p, n)Be-7 nuclear reactions have been carried out at the "Neodymium" picosecond laser facility. A beam of protons was generated on the rear side of a thin aluminum target irradiated by laser radiation with a maximum flux density of 3 x 10(18) W cm(-2) (lambda = 1.055 mu m). Traces of organic compounds on the target surface were the source of protons. Protons were incident on a massive LiF target in which the above nuclear reactions occurred. Our measurements have shown that the neutron flux is anisotropic with a degree of anisotropy equal to 2. We have analyzed the angular distribution of the neutron flux using numerical calculations. We show that at certain proton beam parameters characterizing the energy and angular spectra of protons, it is possible to reproduce the experimentally measured angular distribution of the neutron flux. There are proton beam parameters at which the degree of anisotropy of the neutron flux can be increased several-fold compared to the experimentally measured one.

引用

页码：357 / 367

页数：11

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