Time-dependent generator-coordinate-method study of mass-asymmetric fission of actinides
文献类型：期刊论文
| 作者 | Zhao, J2; Xiang, J3; Li, ZP; Niksic, T5; Vretenar, D5; Zhou, SG
|
| 刊名 | PHYSICAL REVIEW C
 |
| 出版日期 | 2019 |
| 卷号 | 99期号:5页码:54613 |
| 关键词 | HARTREE-BOGOLIUBOV THEORY MEAN-FIELD-THEORY DYNAMICS BARRIER PU-240 |
| ISSN号 | 2469-9985 |
| DOI | 10.1103/PhysRevC.99.054613 |
| 英文摘要 | Low-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. |
| 学科主题 | Physics |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/23433]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 计算平台成果 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China 2.China Acad Engn Phys, Microsyst & Terahertz Res Ctr, Chengdu 610200, Sichuan, Peoples R China 3.China Acad Engn Phys, Inst Elect Engn, Chengdu 610200, Sichuan, Peoples R China 4.Qiannan Normal Univ Nationalities, Dept Phys & Elect Sci, Duyun 558000, Peoples R China 5.Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China 6.Univ Zagreb, Fac Sci, Phys Dept, Bijenicka Cesta 32, Zagreb 10000, Croatia 7.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, 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 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：理论物理研究所
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