Optimum orientation of compact and elongated hexadecapole deformed actinide targets: Application to synthesizing superheavy nuclei

doi:10.1103/PhysRevC.108.044613

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	Optimum orientation of compact and elongated hexadecapole deformed actinide targets: Application to synthesizing superheavy nuclei
	Sharma, Harshit ; Jain, Shivani 1; Kumar, Raj ; Sharma, Manoj K.
刊名	PHYSICAL REVIEW C
	2023
卷号	108 期号:4 页码:44613
关键词	LEVEL DENSITIES CROSS-SECTIONS QUASI-FISSION FUSION COLD HEAVY DEFORMATIONS EVAPORATION ELEMENTS MASSES
ISSN号	2469-9985
DOI	10.1103/PhysRevC.108.044613
英文摘要	Background: The quadrupole (beta 2 +/-) deformed targets in the actinide region are found to be of great relevance in the production of superheavy nuclei (SHN), in both the hot and cold fusion mechanisms. Recently, the application of elongated or cold and compact or hot configurations of pear-shape octupole (up to beta 3 +/-) deformed nuclei was found to play significant role in the fusion-fission dynamics of heavy-ion induced reactions, in the low energy regime.Purpose: To understand the relevance of higher-order deformed (up to beta 4 +/-) actinides and their compact and elongated nuclear fusion configurations in the production cross section of SHN, we have obtained the optimum orientations (theta opt) in reference to the above mentioned configurations of beta 4-deformed targets. For this, a variety of projectile-target combinations-spherical (36S, 40,48Ca) and beta 2 +/--deformed (30Si, 34S) nuclei as incident beams and beta 4-deformed (with different signs +/- and magnitudes) actinides (approximate to 1400 isotopes) as targets-are taken into consideration. Later, the application of theta hot/cold opt (beta 2 +/-beta 3 +/-beta 4 +/-) was done to analyze the fragmentation structure of 286Cn.Methods: On the basis of the proximity theorem, the optimum orientations (theta opt) defining the compact and elongated configurations of deformed nuclei are obtained at the maximum and minimum barrier height, respectively. Further, the obtained theta opt and static deformations (up to beta 4 +/-) for around 1400 isotopes of actinides are utilized in the calculations of capture cross section sigma cap(Ec.m.) using the extended -summed Wong model at energies lying across the Coulomb barrier. Also, to study the fragmentation structure of 286Cn SHN, the collective clusterization approach of quantum mechanical fragmentation theory has been adopted. Results: For a large variety of projectile-target combinations, leading to SHN, the incorporation of higher order deformation (up to beta 4 +/-) shows a significant influence on theta hot/cold opt with the effect of +/- signs and different magnitudes of beta 4 +/- deformation. Also, with the incorporation of deformations up to beta 4 +/- and corresponding theta opt, the sigma cap(Ec.m.) improves and is in better agreement with the available experimental data of 238U-based reactions, across the barrier energies. Also, in the decay channel, the beta 4-deformed fragments, i.e., 143Ba + 143Ba, are found to minimize the fragmentation potential, as compared to the beta 2 or beta 3 deformed fragments.Conclusion: The present study concludes that the optimized configurations of higher-order deformed actinides up to beta 4 participate relatively better than the optimized configurations of beta 2 and beta 3 deformed nuclei in the formation as well as exit channel of superheavy nuclei.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/28040]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.[Sharma, Harshit; Kumar, Raj; Sharma, Manoj K.] Thapar Inst Engn & Technol, Sch Phys & Mat Sci, Patiala 147004, Punjab, India 2.Chinese Acad Sci, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Sharma, Harshit,Jain, Shivani,Kumar, Raj,et al. Optimum orientation of compact and elongated hexadecapole deformed actinide targets: Application to synthesizing superheavy nuclei[J]. PHYSICAL REVIEW C,2023,108(4):44613.
APA	Sharma, Harshit,Jain, Shivani,Kumar, Raj,&Sharma, Manoj K..(2023).Optimum orientation of compact and elongated hexadecapole deformed actinide targets: Application to synthesizing superheavy nuclei.PHYSICAL REVIEW C,108(4),44613.
MLA	Sharma, Harshit,et al."Optimum orientation of compact and elongated hexadecapole deformed actinide targets: Application to synthesizing superheavy nuclei".PHYSICAL REVIEW C 108.4(2023):44613.