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arXiv 2408.09231nucl-exnucl-th
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$^{7}$Li+$^{10}$B弹性散射及锂诱导的$^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B单核子转移反应研究

Study of $^{7}$Li+$^{10}$B elastic scattering and the lithium-induced reaction of one-nucleon transfers from $^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B

Sergey Stukalov, Yuri Sobolev, Yuri Penionzhkevich, Nassurlla Burtebayev, Sergey Goncharov, Yuri Gurov, Andrey Danilov, Alla Demyanova, Sergey Dmitriev, Maulen … 展开作者

Sergey Stukalov, Yuri Sobolev, Yuri Penionzhkevich, Nassurlla Burtebayev, Sergey Goncharov, Yuri Gurov, Andrey Danilov, Alla Demyanova, Sergey Dmitriev, Maulen Nassurlla, Viktar Starastsin, Alexey Shakhov, Semyon Raidun, Nguyen Hoai Chau

AI总结:

本研究在58 MeV束流能量下测量$^{7}$Li+$^{10}$B弹性散射及单核子转移反应角分布,通过DWBA分析得到光学势与ANC值,证实$^{6}$Li 3.56 MeV激发态波函数空间尺度更大,支持该态存在晕结构。

摘要:

在实验室能量$E_\ ext{lab}$=58 MeV的条件下,测量了$^{7}$Li弹性散射的角分布,以及锂诱导的$^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B单核子转移反应的角分布。实验利用杜布纳联合原子核研究所(JINR)弗廖罗夫核反应实验室(FLNR)的U-400加速器束流完成。首次给出了伴随3.56 MeV激发态($^{6}$Li*)产生的$^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B反应的角分布。\n对$^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B基态(g.s.)跃迁、以及对应$^{6}$Li激发态($J^π$=0$^+$,$T$=1,$E$=3.56 MeV)跃迁的微分截面开展了DWBA(扭曲波玻恩近似)分析。通过拟合测得的弹性散射数据,并评估出射反应道的参数,得到了光学模型势。采用基于求解反应形状因子近似方程的唯象方法,确定了形状因子的径向依赖关系以及渐近归一化系数(ANC)的经验值。\n得到的$^{6}$Li$ _\ ext{g.s.}$和$^{6}$Li*(3.56 MeV)态的ANC值与文献报道值一致。形状因子径向依赖的对比表明,处于激发态($J^π$=0$^+$,$T$=1,$E$=3.56 MeV)的$^{6}$Li原子核波函数,其空间尺度比基态更大。该结果支持$^{6}$Li*(3.56 MeV)态存在晕结构的观点,而$^{6}$Li$ _\ ext{g.s.}$是否存在晕结构的问题仍悬而未决。

英文摘要:

The angular distributions of elastic scattering of $^{7}$Li, as well as the lithium-induced reaction of one-nucleon transfers $^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B were measured at $E_\text{lab}$ = 58 MeV. Experiment was done using U-400 accelerator beam of the FLNR JINR, Dubna. Angular distribution for reaction $^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B with excitation of the 3.56 MeV state ($^{6}$Li*) is presented for the first time. The DWBA analysis of the differential cross section of the $^{10}$B($^{7}$Li,$^{6}$Li)$^{11}$B ground state (g.s.) transition and excited ($J^π$ = 0$^+$, $T$ = 1, $E$ = 3.56 MeV) state of $^{6}$Li transition was performed. The optical model potentials were obtained by fitting of measured elastic scattering data and evaluating parameters for the output reaction channels. Phenomenological approach based on solving an approximate equation for the reaction form factor was used to determine its radial dependence and empirical values of asymptotic normalization coefficient (ANC). Obtained values of ANCs for the $^{6}$Li$_\text{g.s.}$ and $^{6}$Li*(3.56 MeV) states are in agreement with the literature ones. Comparison of the radial dependences of form factors shows that the wave function of the $^{6}$Li nucleus in excited ($J^π$ = 0$^+$, $T$ = 1, $E$ = 3.56 MeV) state has increased spatial dimension compared to the ground state. This result is an argument in favor of a halo existence in $^{6}$Li*(3.56 MeV) state, while the question of a halo in $^{6}$Li$_\text{g.s.}$ still leaves open.

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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