Vortex octupole mode in the kinetic model of collective excitations in nuclei
The nature of a new isoscalar octupole resonance found within a kinetic model based on the Vlasov equation for finite Fermi systems with moving surfaces is studied. It is shown that this octupole resonance is due to dynamic effects of the nuclear surface, like the low-energy isoscalar dipole resonan...
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| Format: | Article |
| Language: | English |
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Institute for Nuclear Research, National Academy of Sciences of Ukraine
2024-06-01
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| Series: | Ядерна фізика та енергетика |
| Subjects: | |
| Online Access: | https://jnpae.kinr.kyiv.ua/25.2/Articles_PDF/jnpae-2024-25-0099-Abrosimov.pdf |
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| author | V. I. Abrosimov O. I. Davydovska |
| author_facet | V. I. Abrosimov O. I. Davydovska |
| author_sort | V. I. Abrosimov |
| collection | DOAJ |
| description | The nature of a new isoscalar octupole resonance found within a kinetic model based on the Vlasov equation for finite Fermi systems with moving surfaces is studied. It is shown that this octupole resonance is due to dynamic effects of the nuclear surface, like the low-energy isoscalar dipole resonance (vortex dipole mode) observed in heavy nuclei. It is found that the velocity field associated with the new octupole resonance has a vortex character in the surface region of the nuclear liquid and, moreover, the vortex motion of nucleons is fragmented into three areas near the nuclear surface. At the same time, the velocity field associated with the high-energy octupole resonance found within our kinetic model displays an octupole deformation form and includes a compression within the nuclear fluid, which is consistent with the corresponding quantum calculations in the random phase approximation. |
| format | Article |
| id | doaj-art-6f339181007f489ca7c28cf852d31e14 |
| institution | OA Journals |
| issn | 1818-331X 2074-0565 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Institute for Nuclear Research, National Academy of Sciences of Ukraine |
| record_format | Article |
| series | Ядерна фізика та енергетика |
| spelling | doaj-art-6f339181007f489ca7c28cf852d31e142025-08-20T02:06:23ZengInstitute for Nuclear Research, National Academy of Sciences of UkraineЯдерна фізика та енергетика1818-331X2074-05652024-06-0125299104https://doi.org/10.15407/jnpae2024.02.099Vortex octupole mode in the kinetic model of collective excitations in nucleiV. I. Abrosimov0O. I. Davydovska1Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, UkraineInstitute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, UkraineThe nature of a new isoscalar octupole resonance found within a kinetic model based on the Vlasov equation for finite Fermi systems with moving surfaces is studied. It is shown that this octupole resonance is due to dynamic effects of the nuclear surface, like the low-energy isoscalar dipole resonance (vortex dipole mode) observed in heavy nuclei. It is found that the velocity field associated with the new octupole resonance has a vortex character in the surface region of the nuclear liquid and, moreover, the vortex motion of nucleons is fragmented into three areas near the nuclear surface. At the same time, the velocity field associated with the high-energy octupole resonance found within our kinetic model displays an octupole deformation form and includes a compression within the nuclear fluid, which is consistent with the corresponding quantum calculations in the random phase approximation.https://jnpae.kinr.kyiv.ua/25.2/Articles_PDF/jnpae-2024-25-0099-Abrosimov.pdfisoscalar octupole resonanceskinetic modelstrength functiondynamic surface effectsvelocity field. |
| spellingShingle | V. I. Abrosimov O. I. Davydovska Vortex octupole mode in the kinetic model of collective excitations in nuclei Ядерна фізика та енергетика isoscalar octupole resonances kinetic model strength function dynamic surface effects velocity field. |
| title | Vortex octupole mode in the kinetic model of collective excitations in nuclei |
| title_full | Vortex octupole mode in the kinetic model of collective excitations in nuclei |
| title_fullStr | Vortex octupole mode in the kinetic model of collective excitations in nuclei |
| title_full_unstemmed | Vortex octupole mode in the kinetic model of collective excitations in nuclei |
| title_short | Vortex octupole mode in the kinetic model of collective excitations in nuclei |
| title_sort | vortex octupole mode in the kinetic model of collective excitations in nuclei |
| topic | isoscalar octupole resonances kinetic model strength function dynamic surface effects velocity field. |
| url | https://jnpae.kinr.kyiv.ua/25.2/Articles_PDF/jnpae-2024-25-0099-Abrosimov.pdf |
| work_keys_str_mv | AT viabrosimov vortexoctupolemodeinthekineticmodelofcollectiveexcitationsinnuclei AT oidavydovska vortexoctupolemodeinthekineticmodelofcollectiveexcitationsinnuclei |