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 1809.07798nucl-th
收藏

带电粒子发射在$^{82}$ Se+ $^{138}$ Ba反应生成$^{220}$ Th复合核蒸发残渣中的作用

Role of charged particle emission on the evaporation residue formation in the $^{82}$Se+$^{138}$Ba reaction leading to the $^{220}$Th compound nucleus

G. Mandaglio, A. K. Nasirov, A. Anastasi, F. Curciarello, G. Fazio, G. Giardina

摘要:

我们提出了详细的理论研究的结果,在重离子反应中获得的蒸发残留核的生产时,带电粒子(质子和$α$ -粒子)也发射与中子蒸发沿所形成的复合核的去激发级联。由于在12- 70 MeV激发能范围内,$^{220}$ Th复合核(CN)级联过程中有许多关于少量轻粒子发射后的单个蒸发残渣(ER)截面的实验结果,我们研究了几乎质量对称的$^{82}$ Se+ $^{138}$ Ba反应.我们对$^{82}$ Se+ $^{138}$ Ba的ER截面的具体理论结果与现有的实验测量结果吻合得很好,但我们关于蒸发残余物的所有可能的相关贡献的总体理论结果比实验测量的ER大几倍。这种差异可能是由于在多个中性和带电粒子的发射后识别ER核的实验困难,然而ER数据的分析对于测试模型的可靠性和强调在带电粒子发射后也获得ER核的调查的重要性是非常重要的。

英文摘要:

We present detailed results of a theoretical investigation on the production of evaporation residue nuclei obtained in a heavy ion reaction when charged particles (proton and $α$-particle) are also emitted with the neutron evaporation along the deexcitation cascade of the formed compound nucleus. The almost mass symmetric $^{82}$Se+$^{138}$Ba reaction has been studied since there are many experimental results on individual evaporation residue (ER) cross sections after few light particle emissions along the cascade of the $^{220}$Th compound nucleus (CN) covering the wide 12--70 MeV excitation energy range. Our specific theoretical results on the ER cross sections for the $^{82}$Se+$^{138}$Ba are in good agreement with the available experimental measurements, but our overall theoretical results concerning all possible relevant contributions of evaporation residues are several times greater than the ERs measured in experiment. The discrepancy could be due to the experimental difficulties in the identification of ER nuclei after the emission of multiple neutral and charged particles, nevertheless the analysis of ER data is very important to test the reliability of the model and to stress the importance on the investigation of ER nuclei also obtained after charged particle emissions.

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。

↑