Total charge-changing and partial cross-section measurements in the reactions of ∼ 110 – 250 M e V / n u c l e o n 12 C in carbon, paraffin, and water
Total charge-changing and partial cross-section measurements in the reactions of ∼ 110 – 250 M e V / n u c l e o n 12 C in carbon, paraffin, and water
复制标题
碳、石蜡和水中 〜 110 – 250 M e V / 核 12 C 反应中的总电荷变化和部分横截面测量
DOI：
10.1103/physrevc.66.014609
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发表时间：
2002
影响因子：
3.1
通讯作者：
T. Murakami
中科院分区：
文献类型：
--
作者：
A. Golovchenko;J. Skvarc;N. Yasuda;M. Giacomelli;S. Tretyakova;R. Ilić;R. Bimbot;M. Toulemonde;T. Murakami
直接测量了$\ensuremath{\sim}110—250 \ mathm {M}\ mathm {e}\ mathm {V}/\ mathm {n}\ mathm {u}\ mathm {c}\ mathm {l}\ mathm {e}\ mathm {o}}\ mathm {n}}^{12}\ mathm {c} $离子在c、${\ mathm {CH}}{2}、$和${\ mathm {H}} {2}\ mathm {o} $靶中的总变电荷截面和生成B、Be片段的截面。采用刻蚀迹迹检测器CR-3，配合自动迹迹测量系统和迹迹匹配算法对初次颗粒进行计数和识别。将目前的数据和以前测量的截面与模型预测进行了比较。对于总电荷变化截面，美国宇航局开发的一个模型与目前的结果最吻合（平均约为3%）。然而，对于碎片的生产，对于所研究的所有系统，模型的结果与本工作中提供的数据平均偏差为$Z=5$ 9- 58%，对于$Z=4 $ 5- 47%。被称为NUCFRG2的模型在给出碎片横截面的最接近值方面是最可靠的，对于本工作中研究的系统，B和Be碎片分别为9和5%。
Total charge-changing cross sections and cross sections for the production of B and Be fragments were directly measured for reactions induced by $\ensuremath{\sim}110--250 \mathrm{M}\mathrm{e}\mathrm{V}/\mathrm{n}\mathrm{u}\mathrm{c}\mathrm{l}\mathrm{e}\mathrm{o}\mathrm{n}{ }^{12}\mathrm{C}$ ions in C, ${\mathrm{CH}}_{2},$ and ${\mathrm{H}}_{2}\mathrm{O}$ targets. Etched track detector (CR-3) was used, together with an automatic track measuring system and a track matching algorithm, to count and to identify the primary and secondary particles. A comparison of the present data and of previously measured cross sections with model predictions is carried out. For the total charge-changing cross section, a model developed at NASA gives the best agreement with the present results (about 3% on the average). However, for the production of fragments, the results of models deviate on average for all systems studied by 9--58 % from the data presented in this work for $Z=5$ and by 5--47 % for $Z=4.$ The model known as NUCFRG2 is the most reliable in giving the closest values for fragmentation cross sections, 9 and 5% for B and Be fragments, respectively, for the systems studied in this work.