Initiation of the (γ, n) and (p, n) nuclear reactions in the picosecond laser plasma at a laser intensity of 2 x 1018 W/cm2

被引：6
作者：
Belyaev, V. S. [1 ]
Matafonov, A. P. [1 ]
Ribakov, S. M. [1 ]
Krainov, V. P. [2 ]
Lisitsa, V. S. [3 ]
Andrianov, V. P. [4 ]
Ignat'ev, G. N. [4 ]
Rusetskiy, A. S. [5 ]
机构：
[1] Cent Res Inst Machine Bldg, Korolev 141070, Moscow Oblast, Russia
[2] State Univ, Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Oblast, Russia
[3] Russian Res Ctr, Kurchatov Inst, Inst Nucl Fus, Moscow 123182, Russia
[4] All Russia Res Inst Automat, Moscow 127055, Russia
[5] Russian Acad Sci, PN Lebedev Phys Inst, Moscow 117924, Russia
来源：
LASER PHYSICS | 2011年 / 21卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
SOLID INTERACTIONS; PULSE; ULTRASHORT; GENERATION; TARGETS; PROTONS; PHYSICS; FIELDS; RAYS;
D O I：
10.1134/S1054660X11160018
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The experimental results on the initiation of various (gamma, n) and (p, n) nuclear reactions in the picosecond laser plasma are presented. It is demonstrated that the following (gamma, n) and (p, n) nuclear reactions can be initiated at a laser intensity of 2 x 10(18) W/cm(2) with the threshold energies of gamma-quanta ranging from 1.67 to 7.56 MeV and the threshold energies of protons ranging from 1.88 to 5 MeV: Be-9(gamma, n)2 alpha, Ta-181(gamma, n)Ta-180, Li-7(p, n)Be-7, Cu-63(p, n)Zn-63, Ti-48(p, n)V-48. The method based on the detection of fast neutrons using the 3He counters is employed for the measurement of the number of the initiated (gamma, n) and (p, n) nuclear reactions. The measured yield of the (gamma, n) and (p, n) nuclear reactions ranges from 5 x 10(1) to 10(5) reactions per laser pulse.
引用
收藏
页码：1398 / 1403
页数：6
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