Generalized time-dependent generator coordinate method for induced fission dynamics
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866929231388213248 |
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| author | Li, B. Vretenar, D. Nikšić, T. Zhao, J. Zhao, P. W. Meng, J. |
| author_facet | Li, B. Vretenar, D. Nikšić, T. Zhao, J. Zhao, P. W. Meng, J. |
| contents | The generalized time-dependent generator coordinate method (TD-GCM) is extended to include pairing correlations. The correlated GCM nuclear wave function is expressed in terms of time-dependent generator states and weight functions. The particle-hole channel of the effective interaction is determined by a Hamiltonian derived from an energy density functional, while pairing is treated dynamically in the standard BCS approximation with time-dependent pairing tensor and single-particle occupation probabilities. With the inclusion of pairing correlations, various time-dependent phenomena in open-shell nuclei can be described more realistically. The model is applied to the description of saddle-to-scission dynamics of induced fission. The generalized TDGCM charge yields and total kinetic energy distribution for the fission of 240Pu, are compared to those obtained using the standard time-dependent density functional theory (TD-DFT) approach, and with available data. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_12564 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Generalized time-dependent generator coordinate method for induced fission dynamics Li, B. Vretenar, D. Nikšić, T. Zhao, J. Zhao, P. W. Meng, J. Nuclear Theory The generalized time-dependent generator coordinate method (TD-GCM) is extended to include pairing correlations. The correlated GCM nuclear wave function is expressed in terms of time-dependent generator states and weight functions. The particle-hole channel of the effective interaction is determined by a Hamiltonian derived from an energy density functional, while pairing is treated dynamically in the standard BCS approximation with time-dependent pairing tensor and single-particle occupation probabilities. With the inclusion of pairing correlations, various time-dependent phenomena in open-shell nuclei can be described more realistically. The model is applied to the description of saddle-to-scission dynamics of induced fission. The generalized TDGCM charge yields and total kinetic energy distribution for the fission of 240Pu, are compared to those obtained using the standard time-dependent density functional theory (TD-DFT) approach, and with available data. |
| title | Generalized time-dependent generator coordinate method for induced fission dynamics |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2309.12564 |