Kinetic approach of light-nuclei production in intermediate-energy heavy-ion collisions
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866911653210095616 |
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| author | Wang, Rui Ma, Yu-Gang Chen, Lie-Wen Ko, Che Ming Sun, Kai-Jia Zhang, Zhen |
| author_facet | Wang, Rui Ma, Yu-Gang Chen, Lie-Wen Ko, Che Ming Sun, Kai-Jia Zhang, Zhen |
| contents | We develop a kinetic approach to the production of light nuclei up to mass number $A$ $\leqslant$ $4$ in intermediate-energy heavy-ion collisions by including them as dynamic degrees of freedom. The conversions between nucleons and light nuclei during the collisions are incorporated dynamically via the breakup of light nuclei by a nucleon and their inverse reactions. We also include the Mott effect on light nuclei, i.e., a light nucleus would no longer be bound if the phase-space density of its surrounding nucleons is too large. With this kinetic approach, we obtain a reasonable description of the measured yields of light nuclei in central Au+Au collisions at energies of $0.25$ - $1.0A~\rm GeV$ by the FOPI collaboration. Our study also indicates that the observed enhancement of the $α$-particle yield at low incident energies can be attributed to a weaker Mott effect on the $α$-particle, which makes it more difficult to dissolve in nuclear medium, as a result of its much larger binding energy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_02988 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Kinetic approach of light-nuclei production in intermediate-energy heavy-ion collisions Wang, Rui Ma, Yu-Gang Chen, Lie-Wen Ko, Che Ming Sun, Kai-Jia Zhang, Zhen Nuclear Theory We develop a kinetic approach to the production of light nuclei up to mass number $A$ $\leqslant$ $4$ in intermediate-energy heavy-ion collisions by including them as dynamic degrees of freedom. The conversions between nucleons and light nuclei during the collisions are incorporated dynamically via the breakup of light nuclei by a nucleon and their inverse reactions. We also include the Mott effect on light nuclei, i.e., a light nucleus would no longer be bound if the phase-space density of its surrounding nucleons is too large. With this kinetic approach, we obtain a reasonable description of the measured yields of light nuclei in central Au+Au collisions at energies of $0.25$ - $1.0A~\rm GeV$ by the FOPI collaboration. Our study also indicates that the observed enhancement of the $α$-particle yield at low incident energies can be attributed to a weaker Mott effect on the $α$-particle, which makes it more difficult to dissolve in nuclear medium, as a result of its much larger binding energy. |
| title | Kinetic approach of light-nuclei production in intermediate-energy heavy-ion collisions |
| topic | Nuclear Theory |
| url | https://arxiv.org/abs/2305.02988 |