HIGH-ENERGY GAMMA-RAY PRODUCTION IN PROTON-INDUCED REACTIONS AT 104, 145, AND 195 MEV

被引：20
作者：
CLAYTON, J
BENENSON, W
CRONQVIST, M
FOX, R
KROFCHECK, D
PFAFF, R
REPOSEUR, T
STEVENSON, JD
WINFIELD, JS
YOUNG, B
MOHAR, MF
BLOCH, C
FIELDS, DE
机构：
[1] MICHIGAN STATE UNIV, NATL SUPERCOND CYCLOTRON LAB, E LANSING, MI 48824 USA
[2] INDIANA UNIV, CYCLOTRON FACIL, BLOOMINGTON, IN 47405 USA
[3] MICHIGAN STATE UNIV, DEPT PHYS & ASTRON, E LANSING, MI 48824 USA
[4] MICHIGAN STATE UNIV, DEPT CHEM, E LANSING, MI 48824 USA
来源：
PHYSICAL REVIEW C | 1992年 / 45卷 / 04期
关键词：
D O I：
10.1103/PhysRevC.45.1815
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Energy spectra and angular distributions have been measured for high energy gamma rays (E-gamma greater-than-or-equal-to 20 MeV) from proton-nucleus reactions at 104, 145, and 195 MeV on targets of C, Zn, and Pb. Gamma rays were observed with energies up to 170 MeV. The spectra showed differences from the typical exponential shape that is observed in gamma ray production from heavy-ion reactions. The angular distribution of the gamma ray is forward peaked in the laboratory, which is consistent with emission from a moving source. A comparison is made with previous measurements at 72, 140, 168, and 200 MeV. The experimental evidence indicates that first-chance incoherent proton-neutron bremsstrahlung is the main production mechanism.
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收藏
页码：1815 / 1821
页数：7
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