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arXiv 0705.1024nucl-ex
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GeV质子辐照厚铅靶的高能阈反应速率

High-energy threshold reaction rates on 0.8 GeV proton-irradiated thick Pb-target

Yu. E. Titarenko, V. F. Batyaev, A. Yu. Titarenko, M. A. Butko, K. V. Pavlov, R. S. Tikhonov, S. N. Florya, S. G. Mashnik, W. Gudowski

备注：
4 pages, 5 figures, 3 tables, only pdf file, to be published in Proc. Int. Conf. on Nucl. Data for Sci. and Technology (ND2007), Nice, France, April 22-27, 2007
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摘要：

本文报道了用活化辅助法测定92 209 Bi、natPb、197 Au、181 Ta、169 Tm、natIn、93 Nb、64 Zn、65 Cu、63 Cu、59 Co、19 F和12 C样品以及121 27 Al样品的阈值反应速率的结果。所有的样品与质子束轴对齐的内部和外部的可拆卸的92厘米厚的铅靶的15厘米直径组装的23个4厘米厚的磁盘。将样品放置在12个靶盘上以再现质子和中子的长轴分布。在2006年6月，该目标暴露于ITEP U-10加速器提取的800 MeV质子束18小时。利用27 Al（p，x）7 Be监测反应测定了质子注量和束流形状。反应速率由直接γ能谱技术测定。总共测量了1196个伽马能谱，确定了大约1500个反应速率。测量的反应速率通过MCNPX代码使用以下数据库进行模拟：ENDF/B6用于20 MeV以下的中子，MENDL 2用于20-100 MeV的中子，以及MENDL 2 P用于高达200 MeV的质子截面。一个可接受的协议与实验数据的模拟已被发现。

英文摘要：

This works presents results of activation-aided determination of threshold reaction rates in 92 209Bi, natPb, 197Au, 181Ta, 169Tm, natIn, 93Nb, 64Zn, 65Cu, 63Cu, 59Co, 19F, and 12C samples and in 121 27Al samples. All the samples were aligned with the proton beam axis inside and outside the demountable 92-cm thick Pb target of 15-cm diameter assembled of 23 4-cm thick discs. The samples were placed on 12 target disks to reproduce the long axis distribution of protons and neutrons. In June 2006, the target was exposed for 18 hours to a 800-MeV proton beam extracted from the ITEP U-10 accelerator. The proton fluence and the proton beam shape were determined using the 27Al(p,x)7Be monitor reaction. The reaction rates were determined by the direct gamma-spectrometry techniques. In total, 1196 gamma-spectra have been measured, and about 1500 reaction rates determined. The measured reaction rates were simulated by the MCNPX code using the following databases: ENDF/B6 for neutrons below 20 MeV, MENDL2 for 20-100 MeV neutrons, and MENDL2P for proton cross sections up to 200 MeV. An acceptable agreement of simulations with experimental data has been found.

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