复合超重核向元素 119 的生存概率

IF 4.3 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS Physics Letters B Pub Date : 2024-10-03 DOI:10.1016/j.physletb.2024.139057

Yu Qiang , Xiang-Quan Deng , Yue Shi , C.Y. Qiao , Junchen Pei

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引用次数: 0

摘要

合成超重元素 119 正成为一个备受关注的问题，各大实验室正在开展多个实验项目。这项工作基于微观能量相关裂变势垒，研究了复合超重原子核在多次中子发射后的存活概率，证明了三轴变形在降低最重区第一裂变势垒方面的重要作用。通过双核系统模型得出的聚变截面，再现了 243Am(48Ca, 3n)288Mc 的最佳能量和残余截面。最后估算了 54Cr+243Am 和 50Ti+249Bk 反应的截面和最佳束流能量，为合成新元素提供了线索。

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Survival probabilities of compound superheavy nuclei towards element 119

To synthesize superheavy element 119 is becoming a highly concerned issue as several experimental projects in major laboratories are being pursued. This work studied the survival probabilities of compound superheavy nuclei after multiple neutron emissions based on microscopic energy dependent fission barriers, demonstrating a significant role of triaxial deformation in decreasing the first fission barriers in the heaviest region. Together with the fusion cross sections by the dinuclear system model, the optimal energy and the residual cross section of ²⁴³Am(⁴⁸Ca, 3n)²⁸⁸Mc are reproduced. Finally the cross sections and optimal beam energies of ⁵⁴Cr+²⁴³Am and ⁵⁰Ti+²⁴⁹Bk reactions are estimated, providing clues for the synthesis of new elements.

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来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.