Fragmentation cross sections of 290 and 400 MeV/nucleon 12C beams on elemental targets
Fragmentation cross sections of 290 and 400 MeV/nucleon 12C beams on elemental targets
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290 和 400 MeV/核子 12C 束流在元素目标上的碎裂截面
DOI：
10.1103/physrevc.76.014911
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发表时间：
2007
影响因子：
3.1
通讯作者：
T. Murakami
中科院分区：
文献类型：
--
作者：
C. Zeitlin;S. Guetersloh;L. Heilbronn;J. Miller;A. Fukumura;Y. Iwata;T. Murakami
本文给出了290 MeV/核子和400 MeV/核子碳束与C、CH_2、Al、Cu、Sn和Pb靶相互作用的零循环电荷变化截面和碎片产生截面。这些光束与癌症治疗、空间辐射和放射性光束的产生有关。我们比较以前发表的结果使用Cand CH 2目标在类似的光束能量。由于许多事件中存在多个片段而引起的歧义，以前的出版物仅报道了B和Be片段的横截面。在这项工作中，我们提取了所有碎片种类的横截面，使用在三个不同的角度接受值获得的数据，补充与检测器堆栈放置在光束轴的数据。用PHITS Monte Carlo程序对实验进行了模拟，结果表明，与大接收探测器获得的数据相当一致，但在小接收时一致性较差。测得的横截面也socover的一维截面modelsEPAX 2和NUCFRG 2的预测，后者是目前使用的NASA的空间radiationtransfer计算。尽管PHITS和NUCFRG 2以合理的精度再现了电荷变化截面，但没有一个模型能够准确地预测所有碎片种类和靶物质的碎片截面。
Charge-changing and fragment production cross sections at 0circ have been obtained for interactions of 290 MeV/nucleon and 400MeV/nucleon carbon beams with C, CH2, Al, Cu, Sn, and Pb targets. Thesebeams are relevant to cancer therapy, space radiation, and the productionof radioactive beams. We compare to previously published results using Cand CH2 targets at similar beam energies. Due to ambiguities arising fromthe presence of multiple fragments on many events, previous publicationshave reported only cross sections for B and Be fragments. In this work wehave extracted cross sections for all fragment species, using dataobtained at three distinct values of angular acceptance, supplemented bydata taken with the detector stack placed off the beam axis. A simulationof the experiment with the PHITS Monte Carlo code shows fair agreementwith the data obtained with the large acceptance detectors, but agreementis poor at small acceptance. The measured cross sections are alsocompared to the predictions of the one-dimensional cross section modelsEPAX2 and NUCFRG2; the latter is presently used in NASA's space radiationtransport calculations. Though PHITS and NUCFRG2 reproduce thecharge-changing cross sections with reasonable accuracy, none of themodels is able to accurately predict the fragment cross sections for allfragment species and target materials.