A helium gas scintillator active target for photoreaction measurements

A helium gas scintillator active target for photoreaction measurements
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用于光反应测量的氦气闪烁体活性目标

DOI:
10.1140/epja/i2015-15123-y
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发表时间:
2015
期刊:
The European Physical Journal A
影响因子:
--
通讯作者:
Al Jebali R
Al Jebali R
中科院分区:
--
文献类型:
--
作者:
Al Jebali R

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本文介绍了一种用于光反应截面测量的多室He气体闪烁体主动靶。靶具有四个主腔室,在2 MPa的操作压力下给出0.103 g/cm 3的总厚度。闪烁读出的光电倍增管和除了少量的N2的He,转移的闪烁发射从紫外到可见光,进行了讨论。在MAX IV实验室标记光子设施的第一次测量结果表明,该目标具有约1纳秒的时间分辨率,可以很好地科普高通量光子束。从目标产量的反应截面的测定依赖于蒙特卡罗模拟,它考虑闪烁光传输,光衰变过程in 4 He,背景光子在目标窗口的相互作用和气体和目标容器中的反应产物粒子的相互作用。将该模拟的预测与测量的目标响应进行比较。
A multi-cell He gas scintillator active target, designed for the measurement of photoreaction cross sections, is described. The target has four main chambers, giving an overall thickness of 0.103 g/cm3at an operating pressure of 2 MPa. Scintillations are read out by photomultiplier tubes and the addition of small amounts of N2to the He, to shift the scintillation emission from UV to visible, is discussed. First results of measurements at the MAX IV Laboratory tagged-photon facility show that the target has a timing resolution of around 1 ns and can cope well with a high-flux photon beam. The determination of reaction cross sections from target yields relies on a Monte Carlo simulation, which considers scintillation light transport, photodisintegration processes in4He, background photon interactions in target windows and interactions of the reaction-product particles in the gas and target container. The predictions of this simulation are compared to the measured target response.
影响因子: 1.4
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DOI: 10.1016/0029-554x(68)90477-1
发表时间: 1968
期刊: Nuclear Instruments and Methods
影响因子: --
作者:
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