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Zhao, J1; Xiang, J2; Li, ZP; Niksic, T4; Vretenar, D4; Zhou, SG
Time-dependent generator-coordinate-method study of mass-asymmetric fission of actinides
Source PublicationPHYSICAL REVIEW C
AbstractLow-energy positive and negative parity collective states in the equilibrium minimum, and the dynamics of induced fission of actinide nuclei are investigated in a unified theoretical framework based on the generator coordinate method (GCM) with the Gaussian overlap approximation (GOA). The collective potential and inertia tensor, both at zero and finite temperature, are computed using the self-consistent multidimensionally constrained relativistic mean field model, based on the energy density functional DD-PC1. Pairing correlations are treated in the Bardeen-Cooper-Schrieffer approximation with a separable pairing force of finite range. A collective quadrupole-octupole Hamiltonian characterized by zero-temperature axially symmetric deformation energy surface and perturbative cranking inertia tensor, is used to model the low-lying excitation spectrum. The fission fragment charge distributions are obtained by propagating the initial collective states in time with the time-dependent GCM+GOA that uses the same quadrupole-octupole Hamiltonian, but with the collective potential and inertia tensor computed at finite temperature. The illustrative charge yields of Th-228, U-234, Pu-240, Cm-244, and Cf-250 are in very good agreement with experiment, and the predicted mass asymmetry is consistent with the result of a recent microscopic study that has attributed the distribution (peak) of the heavier-fragment nuclei to shell-stabilized octupole deformations.
Subject AreaPhysics
MOST Discipline CataloguePhysics, Nuclear
Indexed BySCIE
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Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.China Acad Engn Phys, Microsyst & Terahertz Res Ctr, Chengdu 610200, Sichuan, Peoples R China
2.China Acad Engn Phys, Inst Elect Engn, Chengdu 610200, Sichuan, Peoples R China
3.Qiannan Normal Univ Nationalities, Dept Phys & Elect Sci, Duyun 558000, Peoples R China
4.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China
5.Univ Zagreb, Fac Sci, Phys Dept, Bijenicka Cesta 32, Zagreb 10000, Croatia
6.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China
7.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
8.Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Gansu, Peoples R China
9.Hunan Normal Univ, Synerget Innovat Ctr Quantum Effects & Applicat, Changsha 410081, Hunan, Peoples R China
Recommended Citation
GB/T 7714
Zhao, J,Xiang, J,Li, ZP,et al. Time-dependent generator-coordinate-method study of mass-asymmetric fission of actinides[J]. PHYSICAL REVIEW C,2019,99(5):54613.
APA Zhao, J,Xiang, J,Li, ZP,Niksic, T,Vretenar, D,&Zhou, SG.(2019).Time-dependent generator-coordinate-method study of mass-asymmetric fission of actinides.PHYSICAL REVIEW C,99(5),54613.
MLA Zhao, J,et al."Time-dependent generator-coordinate-method study of mass-asymmetric fission of actinides".PHYSICAL REVIEW C 99.5(2019):54613.
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