Pairing effect on critical spin in chiral rotation
The critical spin Ic (or critical frequency ħωc) represents the minimum spin (or rotational frequency) required for stable chiral solutions in nuclear systems. The effect of pairing on the critical spin has been examined for the particle-hole configuration π(1h11/2)⊗ν(1h11/2)−1 with a triaxial defor...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-02-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269324000042 |
| _version_ | 1827357899211407360 |
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| author | Y. Wu Q.B. Chen |
| author_facet | Y. Wu Q.B. Chen |
| author_sort | Y. Wu |
| collection | DOAJ |
| description | The critical spin Ic (or critical frequency ħωc) represents the minimum spin (or rotational frequency) required for stable chiral solutions in nuclear systems. The effect of pairing on the critical spin has been examined for the particle-hole configuration π(1h11/2)⊗ν(1h11/2)−1 with a triaxial deformation parameter of γ=30∘ using the particle rotor model, which treats the total angular momentum as a good quantum number. Increasing pairing interaction keeps the critical spin Ic constant, but decreases the critical rotational frequency ħωc. This is due to that the enhanced pairing interaction causes valence nucleons angular momenta to align preferentially along the medium axis, resulting in a larger effective collective moment of inertia and facilitating the emergence of chiral rotation at a lower frequency. However, even with an increase in pairing gap from 0.0 to 2.0MeV, the resulting increase in medium axis alignment is less than 1ħ, which is insufficient to change the value of the critical spin Ic. This study suggests that the critical spin remains robust against the influence of pairing interaction. |
| first_indexed | 2024-03-08T05:55:47Z |
| format | Article |
| id | doaj.art-90dc4768fe38472c904414d2c8722e01 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-03-08T05:55:47Z |
| publishDate | 2024-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-90dc4768fe38472c904414d2c8722e012024-02-05T04:29:25ZengElsevierPhysics Letters B0370-26932024-02-01849138445Pairing effect on critical spin in chiral rotationY. Wu0Q.B. Chen1Department of Physics, East China Normal University, Shanghai 200241, ChinaCorresponding author.; Department of Physics, East China Normal University, Shanghai 200241, ChinaThe critical spin Ic (or critical frequency ħωc) represents the minimum spin (or rotational frequency) required for stable chiral solutions in nuclear systems. The effect of pairing on the critical spin has been examined for the particle-hole configuration π(1h11/2)⊗ν(1h11/2)−1 with a triaxial deformation parameter of γ=30∘ using the particle rotor model, which treats the total angular momentum as a good quantum number. Increasing pairing interaction keeps the critical spin Ic constant, but decreases the critical rotational frequency ħωc. This is due to that the enhanced pairing interaction causes valence nucleons angular momenta to align preferentially along the medium axis, resulting in a larger effective collective moment of inertia and facilitating the emergence of chiral rotation at a lower frequency. However, even with an increase in pairing gap from 0.0 to 2.0MeV, the resulting increase in medium axis alignment is less than 1ħ, which is insufficient to change the value of the critical spin Ic. This study suggests that the critical spin remains robust against the influence of pairing interaction.http://www.sciencedirect.com/science/article/pii/S0370269324000042 |
| spellingShingle | Y. Wu Q.B. Chen Pairing effect on critical spin in chiral rotation Physics Letters B |
| title | Pairing effect on critical spin in chiral rotation |
| title_full | Pairing effect on critical spin in chiral rotation |
| title_fullStr | Pairing effect on critical spin in chiral rotation |
| title_full_unstemmed | Pairing effect on critical spin in chiral rotation |
| title_short | Pairing effect on critical spin in chiral rotation |
| title_sort | pairing effect on critical spin in chiral rotation |
| url | http://www.sciencedirect.com/science/article/pii/S0370269324000042 |
| work_keys_str_mv | AT ywu pairingeffectoncriticalspininchiralrotation AT qbchen pairingeffectoncriticalspininchiralrotation |