Investigation of decay mechanisms and associated aspects of exotic nobelium isotopes using the Skyrme energy density formalism  

作　　者：Shubhpreet Kaur Raj Kumar Manoj K.Sharma 

机构地区：[1]Department of Physics and Materials Science,Thapar Institute of Engineering and Technology,Patiala 147004,India

出　　处：《Chinese Physics C》2025年第3期132-142,共11页中国物理C(英文版)

基　　金：Supported by Science Engineering Research Board(SERB),Department of Science and Technology(DST),Govt.of India(CRG/2021/001229,CRG/2021/001144)。

摘　　要：The search for heavy elements has yielded many surprises and enhanced our knowledge of nuclear synthesis and associated dynamical aspects.Although new elements and their associated isotopes have been synthesized,information concerning elements with Z≥102,remains scarce.Further,concerning the transfermium elements,the nuclear shell structure is key to ensuring nuclear stability.Hence,the shell effects have key implications on such nuclei.Many experimental and theoretical investigations have been conducted to examine the reactions induced by heavy ions and the subsequent decay mechanisms in the superheavy mass region.In addition,the region of transfermium elements is of great interest because of the neutron/proton shell effects.Here,our objective is to analyze the decay mechanisms of nuclides having Z=102 nuclei,i.e.,^(248)No*and^(250)No*.An extensive study was conducted using the dynamical cluster-decay model(DCM)based on Quantum Mechanical Fragmentation Theory(QMFT).The focus was to investigate compound nucleus(CN)and non-compound nucleus(nCN)mechanisms,including fusion-fission(ff),quasi-fission(QF),and fast fission(FF).The specific isotopes of interest are^(248)No*and^(250)No*,with attention given to the role of the center-of-mass energy(E_(c.m))and angular momentum(l).The nuclear interaction potential was derived using the Skyrme energy density formalism(SEDF)with the GSkI force parameters.The capture cross-sections were calculated using the-summed Wong Model.The determination of the probability of compound nucleus formation(PCN)involved a function that is dependent upon the center-of-mass energy.The lifetimes of the ff and QF channels were also investigated.Here,CN and nCN decay mechanisms for two isotopes of Z=102 nobelium were analyzed over the range of center-of-mass values(E_(c.m))considering the quadrupole deformationβ_(2)and optimum orientations(θ_(opt))of the decaying fragments.The fragmentation potential,preformation probability,neck length parameter,and reaction cross-sections were explored.Furthe

关 键 词：super heavy nuclei Z=102 CROSS-SECTIONS LIFETIMES 

分 类 号：O57[理学—粒子物理与原子核物理]