Investigating entrance channel effect through the measurement of neutron multiplicity in mass region a  ≈ 200

IF 1.9 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2026-03-01 Epub Date: 2025-11-22 DOI:10.1016/j.nuclphysa.2025.123271

Neha Dhanda , Ashok Kumar , Chetan Sharma , Amninderjeet Kaur , Basant Sura , Komal , Amit , Kiran , B.R. Behera , P. Sugathan , Akhil Jhinghan , N. Saneesh , K.S. Golda , Mohit Kumar , Rishabh Parjapati , Avitesh Agrawal , Ishika Sharma , H.P. Sharma , S.K. Chamoli , Swapna Balkrishna , Lakhyajit Sarma

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引用次数: 0

Abstract

In this study, we measured both the pre-scission and post-scission neutron multiplicities for the ³¹P + ¹⁷⁰Er reaction at excitation energies in the range of 62-84 MeV, using the National Array of Neutron Detectors (NAND) at Inter University Accelerator Centre (IUAC), New Delhi. Theoretical calculations to reproduce the measured neutron multiplicities have been performed using the dynamical model code VECLAN. These calculations show that the dissipation strength parameter (β) increases with excitation energy. Dynamical model calculations also have been performed using HICOL code to understand the fusion dynamics and formation time. It has been observed that transitioning from an asymmetric to a symmetric entrance channel leads to a gradual increase in the compound nucleus formation time, accompanied by more emission of neutrons during its formation.

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通过测量质量区a ≈ 200的中子多重率来研究入口通道效应

在这项研究中，我们使用位于新德里大学加速器中心（IUAC）的国家中子探测器阵列（NAND）测量了激发能在62-84 MeV范围内的31P + 170Er反应的裂变前和裂变后中子多重率。用动力学模型代码VECLAN进行了理论计算，再现了测量到的中子多重度。这些计算表明，耗散强度参数（β）随激发能量的增加而增加。利用HICOL代码进行了动力学模型计算，以了解融合动力学和形成时间。从非对称入口通道到对称入口通道的转变导致复合核形成时间逐渐增加，并且在形成过程中伴随有更多的中子发射。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.

Investigating entrance channel effect through the measurement of neutron multiplicity in mass region a ≈ 200

Abstract

Investigating entrance channel effect through the measurement of neutron multiplicity in mass region a  ≈ 200