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

In the present research，我们carried out the following basic studies necessary for developing a database for theintermediate energy proton nuclear data required in advanced proton-beam应用程序such as r&d of accelerator -驱动系统和癌症治疗：(1) proton nuclear data with high precision系统方法(2) development of theoretical calculation codesand(3)核数据评估方法(establishment of nuclear data evaluation method. high research is to high research的主要目的make a prototype database of the intermediate energy proton nuclear data for a few nuclei with highpriority and to establish a基本技术需求to make a large of proton nuclear datalibrary. The obtained results are as follows:(1) Nuclear data measurementsSystematic measurementswere performed of double-differential cross sections (DDXs) of secondary light-charged particles(i.e., proton, deuteron, triton, D13, D1He，and α particle) produced by the nuclear reactions induced by pro与energies below 100MeV. The following targets were chosen：D112 D1C, D127 D1Al, D154, D1Fe, D158 D1Ni, D190 D1Zr, D193 D1Nb，D1197, D1Au，D1Bi. ΔE-E counter telescopes with a wide dynamic range of detectable energy were developedfor these DDX measurements. Some of the experimental data compared with the evaluated protonnuclear data of LA150 file. Some discrepancies are seen between the experiments and LA150，particularly, for composite particle emission虽然他们的承诺比一般的好。hydrogen和helium production cross sections were derived from the measured DDX data.(2)Theoretical calculation codesWe have made some improvements for a Theoretical model to描述preequilibrium nuclear reactions including multistep direct processeswhich is called as the semiclassical distorted wave modeland developed the model calculation codes. For the reactions on D112 D1C，a mechanism of simultaneous breakup reactions, such as 3α emission，was experimentally and theoretically studiedand a calculation code system was developed on the basis of the obtained results. In addition，nucleon optical potentials for D112 D1C were derived in the energy range of 20 to 150 MeV，from the coupled-channels analysis based on the soft-rotator模型.(3)Nuclear data evaluationTomake a prototype database of the中间能量proton nuclear data我们已经收集了可收集的经验数据proposed kinds of the data to be stored and the data formatsand developed some calculation code systems for evaluation and various计算机工具需要make the database. Less

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