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Study of intermediate energy proton nuclear data for advanced particle beam applications

先进粒子束应用的中能质子核数据研究

基本信息

批准号：
09558059
负责人：
WATANABE Yukinobu
金额：
$ 5.06万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09558059/
关键词：
Advanced particle beam applications Nuclear data Proton Intermediate energy Double-differential cross section Semiclassical distorted wave model Soft rotator model Breakup reaction 半古典的歪曲波モデルチャンネル結合理論炭素アルミニウム前平衡原子核反応

项目摘要

In the present research, we have carried out the following basic studies necessary for developing a database for the intermediate energy proton nuclear data required in advanced proton-beam applications, such as R & D of accelerator -driven system and proton cancer therapy : (1) systematic measurements of proton nuclear data with high precision, (2) development of theoretical calculation codes, and (3) establishment of nuclear data evaluation method. The main purpose of high research is to make a prototype database of the intermediate energy proton nuclear data for a few nuclei with high priority and to establish a basic technique necessary to make a large scale of proton nuclear data library. The obtained results are as follows :(1) Nuclear data measurementsSystematic measurements were performed of double-differential cross sections (DDXs) of secondary light-charged particles (I.e., proton, deuteron, triton, ィイD13ィエD1He, and α particle) produced by the nuclear reactions induced by pro … More tons with energies below 100MeV. The following targets were chosen : ィイD112ィエD1C, ィイD127ィエD1Al, ィイD154, 56ィエD1Fe, ィイD158ィエD1Ni, ィイD190ィエD1Zr, ィイD193ィエD1Nb, ィイD1197ィエD1Au, ィイD1209ィエD1Bi. ΔE-E counter telescopes with a wide dynamic range of detectable energy were developed for these DDX measurements. Some of the experimental data were compared with the evaluated proton nuclear data of LA150 file. Some discrepancies are seen between the experiments and LA150, particularly, for composite particle emission, although the agreement between them is generally good. Also, hydrogen and helium production cross sections were derived from the measured DDX data.(2) Theoretical calculation codesWe have made some improvements for a theoretical model to describe preequilibrium nuclear reactions including multistep direct processes, which is called as the semiclassical distorted wave model, and developed the model calculation codes. For the reactions on ィイD112ィエD1C, a mechanism of simultaneous breakup reactions, such as 3α emission, was experimentally and theoretically studied, and a calculation code system was developed on the basis of the obtained results. In addition, nucleon optical potentials for ィイD112ィエD1C were derived in the energy range of 20 to 150 MeV, from the coupled-channels analysis based on the soft-rotator model.(3) Nuclear data evaluationTo make a prototype database of the intermediate energy proton nuclear data, we have collected available experimental data, proposed kinds of the data to be stored and the data formats, and developed some calculation code systems for evaluation and various computer tools necessary to make the database. Less

在本研究中，我们进行了以下必要的基础研究，以开发先进质子束应用所需的中能质子核数据库，如加速器驱动系统的研发和质子癌症治疗：（1）系统测量高精度质子核数据，（2）开发理论计算代码，（3）核数据评价方法的建立。高研究的主要目的是建立少数几个优先级高的中能质子核数据的原型数据库，并建立大规模质子核数据库所必需的基本技术。（1）核数据测量系统地测量了次级轻带电粒子的双微分截面（DDX），质子、氘核、triton、氘D13、氘D1 He和α粒子）。 ...更多信息能量低于100 MeV的能量。选择了以下目标：イD112 D1 C、イD127 D1 Al、イD154、56 D1 Fe、イD158 D1 Ni、イD190 D1 Zr、イD193 D1 Nb、イD1197 D1 Au、イD1209 D1 Bi。为这些DDX测量开发了具有宽动态范围可探测能量的ΔE-E计数器望远镜。部分实验数据与LA 150文件评价的质子核数据进行了比较。在实验和LA 150之间看到一些差异，特别是对于复合颗粒排放，尽管它们之间的一致性一般是好的。此外，氢和氦的生产截面来自于测量的DDX数据。(2)理论计算程序我们对一个描述包括多步直接过程的预平衡核反应的理论模型--半经典扭曲波模型作了一些改进，并编制了模型计算程序。对氘氚D112氘氚D1C上的反应，从实验和理论上研究了3α发射等同时破裂反应的机理，并在此基础上开发了计算程序系统。此外，从基于软旋转体模型的耦合道分析中，导出了20 - 150 MeV能量范围内的D112介子D1C的核子光学势。(3)为了建立一个中能质子核数据的原型数据库，我们收集了现有的实验数据，提出了需要存储的数据种类和数据格式，开发了一些用于评价的计算程序系统和建立数据库所需的各种计算机工具。少