Fission fragment spectroscopy of 235U(nth,f)

IF 1.7 4区 物理与天体物理 Q2 PHYSICS, NUCLEAR
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引用次数: 0

Abstract

Simultaneous measurements of the relative fission fragment charge and mass yield distributions have been performed for the even-even fission fragments produced from the reaction, 235U(nth,f). The measurements have been carried out using the conventional fission fragment spectroscopic technique. The extracted results are interpreted on the basis of the Multi-Modal Random Neck Rupture Model (MM-RNRM). The results from the analysis bring out the necessary experimental evidence for the influence of the deformed proton shell closures at Z = 52 and ∼ 56 along with the neutron shell closures at N = 82 (spherical) and 88 (deformed) in controlling the respective S1 and S2 fission modes occurring in the heavier group of asymmetric fission fragments. The new findings from the present investigation provide the crucial inputs for understanding the features of different fission modes that persist in the low-energy fission dynamics of the lighter actinides. The pair wise neutron multiplicity distribution profiles for the five correlated fission fragment pairs have been presented, and the corresponding extracted neutron multiplicity values are also reported.

235U(nth,f) 裂变碎片光谱学
对 235U(nth,f)反应产生的偶偶数裂变碎片的相对裂变碎片电荷和质量产率分布进行了同步测量。测量采用了传统的裂变碎片光谱技术。提取的结果以多模式随机颈部破裂模型(MM-RNRM)为基础进行解释。分析结果提供了必要的实验证据,证明 Z = 52 和 ∼ 56 处的变形质子壳闭合以及 N = 82(球形)和 88(变形)处的中子壳闭合在控制较重不对称裂变碎片组中出现的各自 S1 和 S2 裂变模式方面的影响。本次研究的新发现为理解较轻锕系元素低能裂变动力学中持续存在的不同裂变模式的特征提供了重要依据。研究还展示了五对相关裂变碎片的中子倍率分布图,并报告了相应的中子倍率提取值。
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来源期刊
Nuclear Physics A
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.
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