arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2602.06580nucl-exnucl-th
收藏

反冲弹性散射用于核基态结构:一个引人入胜的$^{30}$Si案例

Quasi-elastic scattering for the nuclear ground state structure: An intriguing case of $^{30}$Si

Bhabha Atomic Research Centre(巴巴原子研究中心);Homi Bhabha National Institute(霍米·巴巴国立研究所);Grand Accélérateur National d’Ions Lourds(大离子加速器);CEA/DSM–CNRS/IN2P3(法国原子能和替代能源委员会/国家科学研究中心/核物理研究所联合实验室);Amity University UP(阿米提北方邦大学);Amity Institute of Nuclear Science & Technology(阿米提核科学与技术学院);Department of Physics, IIT Roorkee(印度理工学院罗尔基分校物理系);Kyoto University(京都大学);SIES College of Arts, Science and Commerce(SIES文理商科学院);Tata Institute of Fundamental Research(塔塔基础研究院)
Y. K. Gupta, B. Maheshwari, G. K. Prajapati, A. K. Jain, K. Hagino, B. N. Joshi, A. Pal, N. Sirswal, Pawan Singh, S. Dubey, V. V. Desai, V. Ranga, V. B. Katariy… 展开作者

Y. K. Gupta, B. Maheshwari, G. K. Prajapati, A. K. Jain, K. Hagino, B. N. Joshi, A. Pal, N. Sirswal, Pawan Singh, S. Dubey, V. V. Desai, V. Ranga, V. B. Katariya, D. Patel, H. Vyas, S. Panwar, B. V. John, I. Mazumdar, B. K. Nayak, U. Garg

AI总结:

通过反冲弹性散射研究$^{30}$Si基态结构,发现其核形状不明确,可能具有形状波动特性。

摘要:

反冲弹性(QEL)散射测量使用$^{28, 30}$Si弹体撞击$^{90}$Zr靶,能量接近库仑垒。耦合通道(CC)计算在较大的参数空间中进行,包括四极和十六极变形,用于N=Z的$^{28}$Si和N=Z+2的$^{30}$Si核。$^{28}$Si在N=Z线上被观察到其基态具有独特的扁平形状。相比之下,对于仅增加两个中子的$^{30}$Si,扁平、纺锤形和球形的CC描述均能与测量结果相容。为进一步研究核结构随中子数变化而演变,进行了壳模型计算。这些计算揭示了从$^{28}$Si到$^{30}$Si时核结构方面的突然变化。结合反应和结构分析一致表明,$^{30}$Si不具有明确的内在形状,是其基态中“形状波动”潜在的候选者。

英文摘要:

Quasi-elastic (QEL) scattering measurements have been performed using the $^{28, 30}$Si projectiles off the $^{90}$Zr target at energies around the Coulomb barrier. Coupled-channels (CC) calculations were carried out in a large parameter space of quadrupole and hexadecapole deformations for the N=Z, $^{28}$Si and N=Z+2, $^{30}$Si nuclei. $^{28}$Si at the N=Z line is observed to be uniquely oblate shaped in its ground state. In contrast, for $^{30}$Si with just two additional neutrons -- oblate, prolate, and spherical CC descriptions are equally compatible with the measurements. To further investigate the nuclear structure evolution with varying neutron number, shell-model calculations were performed. These calculations reveal a sudden change in the nuclear structure aspects at $^{30}$Si in going from $^{28}$Si to $^{30}$Si. Combined reaction and structure analyses consistently indicate that $^{30}$Si does not possess a well-defined intrinsic shape, and it is a potential candidate for ``shape fluctuations" in its ground state.

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。

↑