Pathway for the Production of Neutron-Rich Isotopes around the N=126 Shell Closure.
Pathway for the Production of Neutron-Rich Isotopes around the N=126 Shell Closure.
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DOI：
10.1103/physrevlett.115.172503
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发表时间：
2015-10
影响因子：
8.6
通讯作者：
Y. Watanabe;Y. H. Kim;S. Jeong;Y. Hirayama;N. Imai;H. Ishiyama;H. S. Jung;H. Miyatake;S. Choi;J. Song;E. Clément;G. de France;A. Navin;M. Rejmund;C. Schmitt;G. Pollarolo;L. Corradi;E. Fioretto;D. Montanari;M. Niikura;D. Suzuki;H. Nishibata;J. Takatsu
中科院分区：
文献类型：
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作者：
Y. Watanabe;Y. H. Kim;S. Jeong;Y. Hirayama;N. Imai;H. Ishiyama;H. S. Jung;H. Miyatake;S. Choi;J. Song;E. Clément;G. de France;A. Navin;M. Rejmund;C. Schmitt;G. Pollarolo;L. Corradi;E. Fioretto;D. Montanari;M. Niikura;D. Suzuki;H. Nishibata;J. Takatsu
本文报道了在~（136）MeV/核子下，（136）Pt+（198）Pt系统中多核子转移生成的同位素识别产物的绝对截面。使用大型接受光谱仪获得的同位素分布表明，在远离稳定的N=126壳层闭合附近，Z<78的“难以到达”的富中子同位素的产生。这些奇异的核的形成的主要贡献示出出现在碰撞与一个小的动能耗散。目前的实验发现证实了最近的预测，多核子转移反应将是最佳的方法来填充和表征N=126周围的富中子同位素，这是至关重要的了解天体物理相关的过程和“魔术”的演变远离稳定的数字。
Absolute cross sections for isotopically identified products formed in multinucleon transfer in the (136)Xe+(198)Pt system at ∼8 MeV/nucleon are reported. The isotopic distributions obtained using a large acceptance spectrometer demonstrated the production of the "hard-to-reach" neutron-rich isotopes for Z<78 around the N=126 shell closure far from stability. The main contribution to the formation of these exotic nuclei is shown to arise in collisions with a small kinetic energy dissipation. The present experimental finding corroborates for the first time recent predictions that multinucleon transfer reactions would be the optimum method to populate and characterize neutron-rich isotopes around N=126 which are crucial for understanding both astrophysically relevant processes and the evolution of "magic" numbers far from stability.