Position sensitive and Bragg curve spectroscopy detector system

Nuclear Instruments and Methods in Physics Research Pub Date : 1984-08-01 DOI:10.1016/0167-5087(84)91337-1

Arialdo Moroni , Ileana Iori , Li Zu Yu , Gianfranco Prete , Giuseppe Viesti , Fabiana Gramegna , Antonio Dainelli

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引用次数: 28

Abstract

A heavy ion gas detector system consisting of a Bragg-curve spectroscopy ionization chamber for particle identification and a multiwire proportional chamber as position sensitive fast trigger device is described. The Bragg IC has been tested with several beams up to Z = 36 to investigate some aspects of the BCS method. Results are reported on energy resolution and linearity, Z resolving power and mass sensitivity. The energy resolution is well below 1%. The Bragg-peak amplitude is fairly independent of the energy in a wide energy range and single elements are identified up to Z = 38 with a resolving power Z/ΔZ − 50-80. Isotope identification by range measurement is limited by the straggling in the ionization process and the mass resolving power is M/ΔM ∼ 20–26 for S and Si isotopes. The MWPC allows subnanosecond time resolution and position identification along the in-plane coordinate within ±0.5 mm.

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位置敏感和布拉格曲线光谱检测系统

介绍了一种由用于粒子识别的布拉格曲线电离室和作为位置灵敏快速触发装置的多线比例室组成的重离子气体检测系统。为了研究BCS方法的一些方面，布拉格集成电路已经用Z = 36的几个光束进行了测试。报告了能量分辨率和线性度、Z分辨率和质量灵敏度的结果。能量分辨率远低于1%。在较宽的能量范围内，布拉格峰的振幅与能量无关，可以识别到Z = 38以内的单个元素，分辨能力为Z/ΔZ−50-80。距离测量的同位素鉴定受到电离过程中散列的限制，S和Si同位素的质量分辨能力为M/ΔM ~ 20-26。MWPC允许亚纳秒的时间分辨率和位置识别沿平面坐标在±0.5毫米。

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Nuclear Instruments and Methods in Physics Research

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