Fission of 209Bi and 26Au Nuclei Induced by 30 MeV Protons
Fission of 209Bi and 26Au Nuclei Induced by 30 MeV Protons
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30 MeV 质子诱导 209Bi 和 26Au 原子核裂变
DOI：
10.1080/18811248.2001.9715113
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
M. Lamehi
中科院分区：
文献类型：
--
作者：
H. Noshad;S. Soheyli;M. Lamehi
在农业和医学核研究中心（NRCAM）的回旋加速器部门，用30 MeV的质子轰击209 Bi和197 Au的薄靶。裂变碎片对的动能和它们的飞行时间的相关测量是使用对光谱法进行的。实验测量了裂变截面、碎片质量分布和碎片总动能分布。得到了209 Bi核和197 Au核与30 MeV质子的裂变截面的精确值，分别为1，100 ±100和62±5.6 μB。使用这种方法得到的209 Bi裂变截面及其相关误差此前尚未报道。用激发能为35 MeV的裂变核~（210）Po的液滴模型解释铋裂变碎片质量分布的分散性证实了这一解释。
Thin targets of 209Bi and 197Au were bombarded with 30 MeV protons at the Cyclotron Department of Nuclear Research Center for Agriculture and Medicine (NRCAM). Correlated measurements of kinetic energies of fission fragment pairs, and their time-of-flights were made using pair spectrometry. The fission cross sections, fragment mass distributions, and total kinetic energy distributions of the fragments were measured in our experiment. The accurate values of cross sections for fission of 209Bi and 197 Au nuclei with 30MeV protons were obtained to be 1,100±100 and 62±5.6 μb, respectively. The cross section of 209Bi fission with its associated error, through using this method, has not been reported previously. The interpretation in terms of liquid-drop model of fissioning nucleus 210Po at the excitation energy of 35 MeV was confirmed by the dispersion of the distribution in fragment mass for bismuth fission.