Fission and fragmentation of 208Pb nuclei in collisions with gold nuclei at an energy of 158 GeV per nucleon

被引：0
作者：
Yurevich, V. I. [1 ]
Fomenko, K. A. [1 ]
机构：
[1] Joint Inst Nucl Res, Dubna 141980, Moscow Oblast, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 2013年 / 76卷 / 06期
关键词：
PHOTOFISSION CROSS-SECTION; OS RE TA; IMPACT-PARAMETER; PB; HEAVY; AU; FISSILITY; HF;
D O I：
10.1134/S1063778813060161
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：
The fission and fragmentation of ultrarelativistic Pb-208 nuclei in collisionswith gold nuclei were studied by using a beam from the SPS accelerator at CERN at an energy of 158 GeV per nucleon. The detectors of the target area of the NA45/CERES spectrometer were used in respective measurements. The value obtained for the fission cross section is 301 +/- 44 mb, where about 77% of events stem from the electromagnetic interaction of colliding nuclei, while the remaining part is the contribution of peripheral nuclear interactions. The spallation of lead nuclei that involves the formation of heavy fragments occurs only in collisions where the impact parameter satisfies the condition b > 10 fm. A complete disintegration of lead nuclei to intermediate-mass fragments and light particles is observed in some peripheral collisions.
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页码：669 / 677
页数：9
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