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Predicting the production of neutron rich heavy nuclei in multi-nucleon transfer reactions using GRAZING-F

机译:预测多核子中的富中子重核的产生   使用GRaZING-F进行转移反应

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摘要

Background: Multi-nucleon transfer reactions have recently attractedattention as a possible path to the synthesis of new neutron-rich heavy nuclei. Purpose: We study transfer reactions involving massive nuclei with theintention of understanding if the semi-classical model GRAZING coupled to anevaporation and fission competition model can satisfactory reproduceexperimental data on transfer reactions in which fission plays a role. Methods: We have taken the computer code GRAZING and have added fissioncompetition to it (GRAZING-F) using our current understanding of$\Gamma_n/\Gamma_f$, fission barriers and level densities. Results: The code GRAZING-F seems to satisfactory reproduce experimental datafor $+1p$, $+2p$ and $+3p$ transfers, but has limitations in reproducingmeasurements of larger above-target and below-target transfers. Nonetheless, weuse GRAZING-F to estimate production rates of neutron-rich $N=126$ nuclei,actinides and transactinides. Conclusions: The GRAZING code, with appropriate modifications to account forfission decay as well as neutron emission by excited primary fragments, doesnot predict large cross sections for multi-nucleon transfer reactions leadingto neutron-rich transactinide nuclei, but predicts opportunities to produce newneutron-rich actinide isotopes.
机译:背景:最近,多核子转移反应已引起人们的关注,这是合成富含中子的新重核的可能途径。目的:我们研究涉及大原子核的转移反应,目的是了解半经典模型GRAZING与蒸发和裂变竞争模型耦合能否令人满意地再现关于裂变起作用的转移反应的实验数据。方法:我们采用了计算机代码GRAZING,并根据当前对$ \ Gamma_n / \ Gamma_f $,裂变屏障和能级密度的理解,向其中添加了裂变竞争(GRAZING-F)。结果:代码GRAZING-F似乎可以令人满意地复制$ + 1p $,$ + 2p $和$ + 3p $传输的实验数据,但是在复制较大的高于目标和低于目标的传输量时有局限性。但是,我们使用GRAZING-F来估算富含中子的N = 126 $的核,act系元素和反act系元素的生产率。结论:GRAZING码经过适当的修改以解决裂变衰减以及受激发的初级片段的中子发射的影响,并不能预测多核子转移反应的大横截面,从而导致富含中子的act放线素核,但可以预测产生富含中子的新act系元素的机会。同位素。

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    Yanez, R.; Loveland, W.;

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