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arXiv 1111.4011nucl-exphysics.ins-det
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LENDA,一个用于放射性核束逆运动学实验的低能中子探测器阵列

LENDA, a Low Energy Neutron Detector Array for experiments with radioactive beams in inverse kinematics

G. Perdikakis, M. Sasano, Sam M. Austin, D. Bazin, C. Caesar, S. Cannon, J. M. Deaven, H. J. Doster, C. J. Guess, G. W. Hitt, J. Marks, R. Meharchand, D. T. Ngu… 展开作者

G. Perdikakis, M. Sasano, Sam M. Austin, D. Bazin, C. Caesar, S. Cannon, J. M. Deaven, H. J. Doster, C. J. Guess, G. W. Hitt, J. Marks, R. Meharchand, D. T. Nguyen, D. Peterman, A. Prinke, M. Scott, Y. Shimbara, K. Thorne, L. Valdez, R. G. T. Zegers

摘要:

低能中子探测器阵列(LENDA)是国家超导回旋加速器实验室(NSCL)开发的中子飞行时间(TOF)谱仪,用于稀有同位素束的逆运动学实验。其设计的动机是需要研究在中等能量(> 100 MeV/u)下使用(p,n)电荷交换反应的不稳定核的自旋-同位旋响应。然而,它可以用于任何涉及低能中子(150 keV - 10 MeV)发射的反应研究。该阵列由24个塑料闪烁体棒组成,能够记录反冲中子的能量和角度,具有较高的探测效率。中子能量由飞行时间技术确定,而相互作用的位置则由每个棒的两个光电倍增管的时间和能量信息推断。一个简单的测试装置,利用放射源已被用来表征阵列。测试测量的结果进行了比较与模拟。对能量低于4 MeV的中子,本征时间(位置)分辨率为\sim 400 ps(\sim 6 cm),效率> 20%。

英文摘要:

The Low Energy Neutron Detector Array (LENDA) is a neutron time-of-flight (TOF) spectrometer developed at the National Superconducting Cyclotron Lab- oratory (NSCL) for use in inverse kinematics experiments with rare isotope beams. Its design has been motivated by the need to study the spin-isospin response of unstable nuclei using (p, n) charge-exchange reactions at intermediate energies (> 100 MeV/u). It can be used, however, for any reaction study that involves emission of low energy neutrons (150 keV - 10 MeV). The array consists of 24 plastic scintillator bars and is capable of registering the recoiling neutron energy and angle with high detection efficiency. The neutron energy is determined by the time-of-flight technique, while the position of interaction is deduced using the timing and energy information from the two photomultipliers of each bar. A simple test setup utilizing radioactive sources has been used to characterize the array. Results of test measurements are compared with simulations. A neutron energy threshold of < 150 keV, an intrinsic time (position) resolution of \sim 400 ps (\sim 6 cm) and an efficiency > 20 % for neutrons below 4 MeV have been obtained.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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