Evaporation residue cross-section measurements for 30Si+142Ce system

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2023-11-10 DOI:10.1016/j.nuclphysa.2023.122791

Amninderjeet Kaur , A. Kumar , Chetan Sharma , Neha Dhanda , Raghav , N. Madhavan , S. Nath , J. Gehlot , Gonika , Chandra Kumar , P. Sherpa , A. Parihari , Jyoti Pandey , A.K. Gupta , H.P. Sharma , B.R. Behera

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Abstract

Evaporation residue (ER) cross-sections were measured for ³⁰Si+¹⁴²Ce reaction at laboratory energies in the range of 105 - 132 MeV using the HYbrid Recoil mass Analyzer (HYRA) at IUAC, New Delhi. The transmission efficiency of the HYRA was estimated using the calibration reaction ²⁸Si+¹⁴²Ce. Sub-barrier fusion enhancement was observed when compared with the one-dimensional barrier penetration model predictions for the present system. To explore the phenomena responsible for sub-barrier fusion enhancement, coupled-channels calculations were performed using the CCFULL code. The effect of couplings and the role of positive Q-value neutron transfer (PQNT) channels on sub-barrier fusion cross-sections were investigated. Coupled-channels calculations were able to reproduce the data by including the coupling in both projectile and target nucleus along with two neutron-transfer channels having positive Q-value. The measured ER cross-sections were compared with the nearby systems to explore the role of deformation of the colliding nuclei.

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30Si+142Ce系统蒸发残留物截面测量

利用混合式反冲质量分析仪(HYRA)测量了30Si+142Ce反应在105 - 132 MeV范围内的蒸发残余(ER)截面。利用28Si+142Ce的校准反应估计了HYRA的透射效率。与当前体系的一维势垒穿透模型预测相比，观察到亚势垒融合增强。为了探索导致亚势垒融合增强的现象，使用CCFULL代码进行了耦合通道计算。研究了耦合和正q值中子转移通道(PQNT)对亚势垒聚变截面的影响。耦合通道计算通过包括弹核和靶核中的耦合以及两个具有正q值的中子转移通道来重现数据。将测得的ER截面与附近系统进行比较，探讨碰撞核变形的作用。

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.