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arXiv 1001.4847nucl-th
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$^{238}$ U+ $^{238}$ U碰撞转移反应产生重同位素

Production of heavy isotopes in transfer reactions by collisions of $^{238}$U+$^{238}$U

Zhao-Qing Feng, Gen-Ming Jin, Jun-Qing Li

摘要:

在双核系统(DNS)模型下研究了两个超重核$^{238}$ U+ $^{238}$ U碰撞中的转移反应动力学.两个锕系核碰撞在极短的时间内形成一个超重复合系统,其中可能发生大量的电荷和质量转移。这种反应已经被实验研究,作为生产重核和超重核的另一种方法。系统地分析了碰撞取向在重核素产生截面中的作用。计算结果表明,随着重碎片带电数的增加,截面急剧减小。这种转移机制有利于合成重丰中子同位素,如N=162的次闭合区附近的核,从No(Z=102)到Db(Z=105)。

英文摘要:

The dynamics of transfer reactions in collisions of two very heavy nuclei $^{238}$U+$^{238}$U is studied within the dinuclear system (DNS) model. Collisions of two actinide nuclei form a super heavy composite system during a very short time, in which a large number of charge and mass transfers may take place. Such reactions have been investigated experimentally as an alternative way for the production of heavy and superheavy nuclei. The role of collision orientation in the production cross sections of heavy nuclides is analyzed systematically. Calculations show that the cross sections decrease drastically with increasing the charged numbers of heavy fragments. The transfer mechanism is favorable to synthesize heavy neutron-rich isotopes, such as nuclei around the subclosure at N=162 from No (Z=102) to Db (Z=105).

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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