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Acculate Stopping Power Measurements of Gases (O_2, N_2, NO, and N_2O) for 5-8 MeV Protons.

累积 5-8 MeV 质子的气体（O_2、N_2、NO 和 N_2O）的阻止本领测量。

基本信息

批准号：
02452050
负责人：
SHIOMI-TSUDA Naoko
金额：
$ 0.9万
依托单位：
Nara Women's University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02452050/
关键词：
Stopping power Gas Bragg's additivity rule Acculate measurement Phase state effect (of stopping power)Chemical binding effect (of stopping power)Proton for MeV energy region ガスブラッグ加算則 (阻止能の)化学結合効果 MeV領域の陽子線高精度測度 (阻止能の)物理状態効果

项目摘要

Our project is to measure the stopping powers of several gasses for MeV protons with the highest accuracy under *1.0 %.In the term of 1990 year (Heisei 2), we bought the detecting system of particles (e.g., silicon detectors, preamplifier and amplifier etc.), the pressure gage and the thermometer.In the term of 1991 year (Heisei 3) the system with two gas chambers, one of which is used in gas targets, was made by the idea of ourself and almost all the instruments that is indispensable to the stoppingpower measurement of gas became complete.To measure the stopping powers of gas with the highest accuracy, we must first test the performance of the new instruments obtained by " Grant-in- Aid for Scientific Research".In the term of 1992 year, we tried to measure the stopping powers of Ta foil for 4.5-18 MeV protons in order to test the performance of the gas chambers system and the detecting system. The Ta foil was mounted in the window of one of the gas chambers and the window of the other gas chamber is left empty. The gas chamber system was set in a larger vacuum chamber and for 4.5-18 MeV protons the pulse heights with and without the Ta foil were measured with the detecting system simultaneously in one exposure. Thus obtained stopping power values of Ta were in good agreement with our previous stopping power values. From the result of the present test experiment, therefore, it was concluded that the new instruments are satisfactory for the performance.Using the instruments, the measurements of the stopping powers of gas will be begun soon.

我们的项目是测量几种气体对MeV质子的阻止本领，最高精度在*1.0%以下。在1990年（平成2年）期间，我们购买了粒子检测系统（例如硅探测器、前置放大器和放大器等）、压力表和温度计。在1991年（平成3年）期间，系统有两个气室，其中一个用于气体我们自己构思制作了目标，几乎所有测量气体阻止本领所必需的仪器都齐全了。要以最高精度测量气体阻止本领，首先必须测试“科学研究资助金”获得的新仪器的性能。在1992年期间，我们尝试测量钽箔对4.5-18 MeV质子的阻止本领，以测试毒气室的性能系统和检测系统。将钽箔安装在其中一个气室的窗口中，而另一个气室的窗口留空。气室系统设置在较大的真空室中，对于 4.5-18 MeV 质子，在一次曝光中使用检测系统同时测量有和没有 Ta 箔的脉冲高度。由此获得的 Ta 的阻止本领值与我们之前的阻止本领值非常一致。因此，从目前的测试结果来看，新仪器的性能是令人满意的。利用这些仪器，气体的阻止本领的测量即将开始。