Novel multi-layer plastic-scintillator-based solid active proton target for inverse-kinematics experiments

Novel multi-layer plastic-scintillator-based solid active proton target for inverse-kinematics experiments
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用于逆运动学实验的新型多层塑料闪烁体固体活性质子靶

DOI:
10.1016/j.nima.2020.163514
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发表时间:
2020
期刊:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
影响因子:
--
通讯作者:
Tanihata I.
Tanihata I.
中科院分区:
--
文献类型:
--
作者:
Tran D.T.;Terashima S.;Ong H.J.;Hirakawa K.;Matsuda Y.;Aoi N.;Harakeh M.N.;Itoh M.;Kawabata T.;Kohda A.;Matsumoto S.Y.;Nishi T.;Okamoto J.;Tanihata I.

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我们构建并测试了一种基于塑料闪烁体的新型固态活性质子靶,用于核谱学研究,利用离子束在逆运动学中诱导的核反应。主动靶系统称为堆叠结构固体有机闪烁体主动靶(S 4 AT),由五层塑料闪烁体组成,每层厚度为1 mm。为了确定厚度方向上的反应点,我们利用了闪烁体材料中束流粒子和带电反应产物(S)能量损失的差异。S 4 AT在保持良好能量分辨率的同时,提供了相对较厚的靶的前景。通过考虑不同层之间的相对能量损失,可以消除重合未反应束流粒子所造成的能量损失。这种由多层结构实现的过程对于消除重合的未反应束流粒子的贡献是必不可少的,从而使其能够在中等束流强度下运行,最高可达几个微克秒。我们在东北大学回旋加速器和放射性同位素中心(CERIC)用70 MeV质子束测量了质子-质子的弹性散射,对S 4 AT的性能进行了评估。
We have constructed and tested a novel plastic-scintillator-based solid-state active proton target for use in nuclear spectroscopic studies with nuclear reactions induced by an ion beam in inverse kinematics. The active target system, named Stack Structure Solid organic Scintillator Active Target (S 4 AT), consists of five layers of plastic scintillators, each with a 1-mm thickness. To determine the reaction point in the thickness direction, we exploit the difference in the energy losses due to the beam particle and the charged reaction product (s) in the scintillator material. S 4 AT offers the prospect of a relatively thick target while maintaining a good energy resolution. By considering the relative energy loss between different layers, the energy loss contributed by coincident unreacted beam particles can be eliminated. Such a procedure, made possible by the multi-layer structure, is essential to eliminate the contribution from coincident unreacted beam particles, thus enabling its operation at a moderate beam intensity of up to a few Mcps. We evaluated the performance of S 4 AT by measuring the elastic proton–proton scattering using a 70-MeV proton beam at Cyclotron and Radioisotope Center (CYRIC), Tohoku University.
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