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arXiv 1604.04456nucl-ex
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低能下$^{10}$ B(p,$α$)$^{7}$ Be反应的新研究

A new study of $^{10}$B(p,$α$)$^{7}$Be reaction at low energies

A. Caciolli, R. Depalo, C. Broggini, M. La Cognata, L. Lamia, R. Menegazzo, L. Mou, S. M. R. Puglia, V. Rigato, S. Romano, C. Rossi Alvarez, M. L. Sergi, C. Spitaleri, A. Tumino

摘要:

由于$^{10}$ B(p,$α$)$^{7}$ Be反应在核天体物理、核物理以及清洁能源生产的新型反应堆模型等不同研究领域有着广泛的应用,因此该反应引起了人们极大的兴趣。该反应已在INFN Legnaro国家实验室(LNL)的AN 2000加速器上进行了研究。用活化法测量了宽能量范围(250 $-$ ~ 1182 keV)内的总截面。在LNL的低计数装置上用两个全屏蔽高纯锗探测器测量了反应产生的$^7$ Be核的衰变。目前的数据集显示出一个很大的差异,在相同的能量与以前的数据之一,并降低了总的不确定性的水平为6%。一个R-矩阵计算已经进行了本数据使用的参数从以前的特洛伊木马测量的10和500千电子伏的共振。目前的数据不依赖于R矩阵拟合在一个点上,表明存在尚未观察到的$^{11}$ C水平。需要进一步的核研究来证实这一假设。

英文摘要:

The $^{10}$B(p,$α$)$^{7}$Be reaction is of great interest since it has many applications in different fields of research such as nuclear astrophysics, nuclear physics, and models of new reactors for clean energy generation. This reaction has been studied at the AN2000 accelerator of the INFN National Laboratories of Legnaro (LNL). The total cross section has been measured in a wide energy range (250 $-$ 1182 keV) by using the activation method. The decays of the $^7$Be nuclei produced by the reaction were measured at the low counting facility of LNL by using two fully shielded high-purity germanium detectors. The present dataset shows a large discrepancy with respect to one of the previous data at the same energies and reduces the total uncertainty to the level of 6\%. An R-matrix calculation has been performed on the present data using the parameters from previous Trojan Horse measurements for the 10 and 500 keV resonances. The present data do not lay on the R-matrix fit in one point suggesting the existence of a $^{11}$C level not observed yet. Further nuclear investigations are needed to confirm this hypothesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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