The neutron array of the compact spectrometer for heavy ion experiments in Fermi energy region

IF 1.5 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment Pub Date : 2024-11-09 DOI:10.1016/j.nima.2024.170055

Dawei Si , Sheng Xiao , Yuhao Qin , Junhuai Xu , Baiting Tian , Boyuan Zhang , Dong Guo , Zhi Qin , Xiaobao Wei , Yibo Hao , Zengxiang Wang , Tianren Zhuo , Yuansheng Yang , Xianglun Wei , Herun Yang , Peng Ma , Limin Duan , Kang Wang , Fangfang Duan , Junbing Ma , Zhigang Xiao

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引用次数: 0

Abstract

The emission of neutrons from heavy ion reactions is an important observable for studying the asymmetric nuclear equation of state and the reaction dynamics. A 20-unit neutron array has been developed and mounted on the compact spectrometer for heavy ion experiments (CSHINE) to measure the neutron spectra, neutron–neutron and neutron–proton correlation functions. Each unit consists of a 15

\times

\times

15 cm

^{3}

plastic scintillator coupled to a

ϕ = 52

mm photomultiplier. The Geant4 simulation with optical process is performed to investigate the time resolution and the neutron detection efficiency. The inherent time resolution of 212 ps is obtained by cosmic ray coincidence test. The n-

γ

discrimination and time-of-flight performance are given by ²⁵²Cf radioactive source test and beam test. The neutron energy spectra have been obtained in the angular range

30 ° \leq θ_{lab} \leq 51 °

in the beam experiment of ¹²⁴Sn + ¹²⁴Sn at 25 MeV/u with CSHINE.

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用于费米能区重离子实验的紧凑型光谱仪中子阵列

重离子反应的中子发射是研究非对称核状态方程和反应动力学的重要观测指标。我们开发了一个由 20 个单元组成的中子阵列，并将其安装在重离子实验紧凑型光谱仪（CSHINE）上，用于测量中子光谱、中子-中子和中子-质子相关函数。每个单元由一个 15 × 15 × 15 立方厘米的塑料闪烁器和一个 φ=52 毫米的光电倍增管组成。为研究时间分辨率和中子探测效率，对 Geant4 进行了光学模拟。通过宇宙射线巧合测试获得了 212 ps 的固有时间分辨率。252Cf 放射源测试和射束测试给出了 n-γ 分辨和飞行时间性能。在使用 CSHINE 进行的 25 MeV/u 的 124Sn + 124Sn 射束实验中，获得了 30°≤θlab≤51° 角范围内的中子能谱。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment 物理-光谱学

CiteScore

3.20

自引率

21.40%

发文量

787

审稿时长

1 months

期刊介绍： Section A of Nuclear Instruments and Methods in Physics Research publishes papers on design, manufacturing and performance of scientific instruments with an emphasis on large scale facilities. This includes the development of particle accelerators, ion sources, beam transport systems and target arrangements as well as the use of secondary phenomena such as synchrotron radiation and free electron lasers. It also includes all types of instrumentation for the detection and spectrometry of radiations from high energy processes and nuclear decays, as well as instrumentation for experiments at nuclear reactors. Specialized electronics for nuclear and other types of spectrometry as well as computerization of measurements and control systems in this area also find their place in the A section. Theoretical as well as experimental papers are accepted.