Variation of nonequilibrium processes in the p + Ni system with beam energy
Variation of nonequilibrium processes in the p + Ni system with beam energy
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DOI：
10.1103/physrevc.80.054604
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发表时间：
2009-09
影响因子：
3.1
通讯作者：
A. Budzanowski;M. Fidelus;D. Filges;F. Goldenbaum;H. Hodde;L. Jarczyk;B. Kamys;M. Kistryn;S. Kistryn;S. Kliczewski;A. Kowalczyk;E. Kozik;P. Kulessa;H. Machner;A. Magiera;B. Piskor-Ignatowicz;K. Pysz;Z. Rudy;R. Siudak;M. Wojciechowski
中科院分区：
文献类型：
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作者：
A. Budzanowski;M. Fidelus;D. Filges;F. Goldenbaum;H. Hodde;L. Jarczyk;B. Kamys;M. Kistryn;S. Kistryn;S. Kliczewski;A. Kowalczyk;E. Kozik;P. Kulessa;H. Machner;A. Magiera;B. Piskor-Ignatowicz;K. Pysz;Z. Rudy;R. Siudak;M. Wojciechowski
测量了0.175 GeV质子与Ni靶碰撞产生的p，d，t，{sup 3，4}He，{sup 6，7}Li，{sup 7，9}Be和{sup 10，11}B的双微分截面d{sup 2}{sigma}/d{omega}dE随能量和角度的变化.对测得的微分截面的分析允许提取上面列出的喷射物的总生产截面。光谱和角分布的形状表明，除了从核内级联的核子发射和各种粒子从核内级联的残余物的蒸发的存在下，其他非平衡过程。这些非平衡过程包括核子在核内级联过程中聚结成轻带电粒子，火球发射，这有助于质子和氘核的横截面，以及靶核的分裂，这导致中等质量碎片的发射。所有这样的过程中发现较早在1.2，1.9，和2.5 GeV的Ni和Au目标的光束能量，然而，在本研究中观察到的这些过程中的属性在高和低的光束能量的显着差异。
The energy and angular dependence of double differential cross sections d{sup 2}{sigma}/d{omega}dE were measured for p,d,t,{sup 3,4}He, {sup 6,7}Li, {sup 7,9}Be, and {sup 10,11}B produced in collisions of 0.175 GeV protons with a Ni target. The analysis of measured differential cross sections allowed the extraction of total production cross sections for the ejectiles listed above. The shape of the spectra and angular distributions indicates the presence of other nonequilibrium processes besides the emission of nucleons from the intranuclear cascade and the evaporation of various particles from remnants of intranuclear cascade. These nonequilibrium processes consist of the coalescence of nucleons into light-charged particles during the intranuclear cascade, of the fireball emission, which contributes to the cross sections of protons and deuterons, and of the breakup of the target nucleus, which leads to the emission of intermediate mass fragments. All such processes were found earlier at beam energies 1.2, 1.9, and 2.5 GeV for Ni and Au targets; however, significant differences in the properties of these processes at high and low beam energy are observed in the present study.