Low-Energy Ternary Fission of Actinide Nuclei with the Emission of Nucleons and Light Nuclei

IF 0.48 Q4 Physics and Astronomy

Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2024-08-28 DOI:10.1134/S1062873824707475

L. V. Titova, S. G. Kadmensky, Ya. O. Otvodenko, E. S. Petrykina

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Abstract

Probabilities that are close for the (s, f) and (n_th, f) fission reactions of the corresponding nuclei are estimated for the formation of third particles in the neck of a fissile nucleus. The probabilities are obtained using formulas for calculating the widths of spontaneous and thermal neutron-induced ternary fission of atomic nuclei with the emission of light charged particles. The formulas are based on an approach that views ternary fission as a virtual process, in combination with experimental energy distributions of α particles, hydrogen isotopes, and ⁶He nuclei in the ternary fission of actinide nuclei. It is shown that spontaneous and induced ternary fissions of actinide nuclei with the emission of light charged particles and nucleons occurs from close configurations of the fissile nucleus. The bonding energy of the thermal neutron introduced into the fissile compound nucleus in reactions (n_th, f) is added to the energy of deformation the fissile nucleus but not to the kinetic energy of the third light particle.

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锕系元素核的低能三元裂变与核子和轻核的发射

摘要对相应原子核的（s，f）和（nth，f）裂变反应的概率进行了估算，以确定在易裂变原子核颈部形成第三粒子的概率。这些概率是利用计算原子核自发裂变和热中子诱导三元裂变的宽度并发射轻带电粒子的公式得到的。这些公式基于一种将三元裂变视为虚拟过程的方法，并结合了锕系核三元裂变中 α 粒子、氢同位素和 6He 核的实验能量分布。结果表明，锕系核的自发和诱导三元裂变会从裂变核的近似构型中产生轻带电粒子和核子。在反应（nth, f）中引入易裂变化合物核的热中子的结合能被加到易裂变核的变形能上，但不加到第三颗轻粒子的动能上。

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

Bulletin of the Russian Academy of Sciences: Physics Physics and Astronomy-Physics and Astronomy (all)

CiteScore

0.90

自引率

0.00%

发文量

251

期刊介绍： Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.