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arXiv 1607.00899nucl-ex
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通过超低能d(d,p)t测量的特洛伊木马核不变性的束流能量依赖性和更新检验

Beam energy dependence and updated test of the Trojan horse nucleus invariance via the d(d,p)t measurement at ultra-low energies

Chengbo Li, Qungang Wen, Yuanyong Fu, Jing Zhou, Shuhua Zhou, Qiuying Meng, C. Spitaleri, A. Tumino, R. G. Pizzone, L. Lamia

摘要:

用特洛伊木马方法间接测量了能量从500 keV到几keV的$\mathrm{^2H}(d,p)\mathrm{^3H}$裸核天体物理S(E)因子,该方法应用于锂束能量为11和9.5 MeV的准自由过程$\mathrm{^2H({}^6Li},pt)\mathrm{^4He}$,这使得虚双星过程入射能$\mathrm {E}_{dd}^{qf}$更接近于零准自由能,能量点比以前类似的实验。所得到的结果进行了比较,直接数据以及与以前的间接调查相同的二元反应。结果表明,当入射能量从高值下降到准自由能为零时,同一特洛伊木马核($\mathrm{^6Li}=(d \oplus α)$)提取的低能区S(E)数据的精度变好。从不同的特洛伊木马核($\mathrm{^6Li}=(d \oplus α)$与$\mathrm{^3He}=(d \oplus p)$)提取的数据之间的非常好的协议给出了一个强大的更新测试的独立性的二进制间接截面上选择的特洛伊木马核在低能量。

英文摘要:

The $\mathrm{^2H}(d,p)\mathrm{^3H}$ bare nucleus astrophysical S(E) factor has been measured indirectly at energies from about 500 keV down to several keV by means of the Trojan-horse method applied to the quasi-free process $\mathrm{^2H({}^6Li},pt)\mathrm{^4He}$ induced at the lithium beam energy of 11 and 9.5 MeV, which makes the virtual binary process incident energy $\mathrm {E}_{dd}^{qf}$ go much closer to the zero-quasi-free-energy point than that in the previous similar experiment. The obtained results are compared with direct data as well as with previous indirect investigation of the same binary reactions. It shows that the precision of S(E) data in low energy range extracted via the same Trojan horse nucleus ($\mathrm{^6Li}=(d \oplus α)$ ) becomes better when the incident energy decreases from high value down to the zero-quasi-free-energy point. The very good agreement between data extracted from different Trojan horse nucleus ($\mathrm{^6Li}=(d \oplus α)$ vs. $\mathrm{^3He}=(d \oplus p)$) gives a strong updated test for the independence of the binary indirect cross section on the chosen Trojan horse nucleus at low energies.

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