Distinguishing between He3 and He4 particles by “dEdx’ and “E” measurements

Nuclear Instruments Pub Date : 1958-08-01 DOI:10.1016/0369-643X(58)90095-1

R.W.P. McWhirter , P. Palit, E.H. Bellamy

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引用次数: 1

Abstract

A new type of detector has been built to distinguish between He³ and He⁴ particles of a continuous energy spectrum ranging from about 10 to 30 MeV. It consists of two gridded ionisation chambers which measure the total energy of the particle in two fragments $“E_{1} ” and “E_{2} ”$ , in general E₁ being < E₂. The information is displayed in a cathode ray oscilloscope by a series of spots whose co-ordinates are proportional to the values of E₁ and E₂ for each particle. The positions of the spots are compared to calculated positions to determine the total energy and mass of the particle concerned. The apparatus has been used to study the reaction γ + He⁴ → π⁰ + He⁴ by picking up the recoil α-particle amidst a large background of He³ and singly charged particles. It is currently being used to investigate the photodisintegration of oxygen, argon and krypton at high energies.

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通过“dEdx”和“E”测量来区分He3和He4粒子

一种新型探测器已经建成，可以区分连续能谱范围从10到30 MeV的He3和He4粒子。它由两个栅格电离室组成，测量粒子在“E1”和“E2”两个片段中的总能量，通常E1是<E2。信息在阴极射线示波器中通过一系列点显示，这些点的坐标与每个粒子的E1和E2值成正比。将斑点的位置与计算的位置进行比较，以确定有关粒子的总能量和质量。该装置在大量He3和单荷电粒子背景下，通过捕捉反冲α-粒子，研究了γ + He4→π0 + He4的反应。它目前被用于研究氧、氩和氪在高能下的光分解。

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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Nuclear Instruments

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