High energy muon induced radioactive nuclides in nickel plate and its use for 2-D muon-beam image profile
High energy muon induced radioactive nuclides in nickel plate and its use for 2-D muon-beam image profile
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镍板中高能μ介子诱发放射性核素及其在二维μ介子束图像剖面中的应用
DOI：
10.1016/j.nima.2015.07.021
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
S. Kunieda
中科院分区：
文献类型：
--
作者：
Y. Kurebayashi;H. Sakurai;Y. Takahashi;N. Doshita;S. Kikuchi;F. Tokanai;K. Horiuchi;Y. Tajima;T. Oe;T. Sato;S. Gunji;E. Inui;K. Kondo;N. Iwata;N. Sasaki;H. Matsuzaki;S. Kunieda
在CERN-SPS的COMPASS实验线上，将靶材料暴露于能量为160 GeV/c的μ子束，以测量μ子诱导放射性核素的产生截面。μ子成像仪包含四个镍板，每个镍板尺寸为100 mm×100 mm，暴露于IP板，在33天的照射期间成功地检测到μ子束图像。镍片的对比密度率为（5.2±0.7）×10- 9 PSL/μ on/1天。图像测量的水平和垂直长度分别为122 mm和174 mm，相对于底座表面，表明50±6%的μ子束流被限制在整个μ子束的18%的区域内。在总束流图像面积（0.81±0.1）× 10 ~（13）的范围内，由PSL值估算的μ子数与CERN SPS的M2束线电离室的μ子总数相当。Cr-51、Mn-54、Co-56、Co-57和Co-58在镍中的产生截面分别为0.19±0.08、0.34±0.06、0.5±0.05、3.44±0.07、0.4±0.03（以mb为单位），减少了μ子相关粒子的影响。它们比Heisinger等人正在进行的研究小大约10倍。
Target materials were exposed to a muon beam with an energy of 160 GeV/c at the COMPASS experiment line in CERN-SPS to measure the production cross-sections for muon-induced radionuclides. A muon imager containing four nickel plates, each measuring 100 mm×100 mm, exposed to the IP plate successfully detected the muon beam image during an irradiation period of 33 days. The contrasting density rate of the nickel plate was (5.2±0.7)×10–9PSL/muon per one-day exposure to IP. The image measured 122 mm and 174 mm in horizontal and vertical lengths, respectively, in relation to the surface of the base, indicating that 50±6% of the muon beam flux is confined to an area of 18% of the whole muon beam. The number of muons estimated from the PSL value in the total beam image area (0.81±0.1)×1013was comparable to the total muon counts of the ion-chamber at the M2 beam line in the CERN-SPS. The production cross-sections of Cr-51, Mn-54, Co-56, Co-57, and Co-58 in nickel were 0.19±0.08, 0.34±0.06, 0.5±0.05, 3.44±0.07, 0.4±0.03 in the unit of mb, respectively, reducing muon associated particles effects. They are approximately 10 times smaller than that a proceeding study by Heisinger et al.