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GIANT NEUTRON HALO IN Ce ISOTOPES NEAR THE NEUTRON DRIP LINEтезисы доклада
- Авторы: Klimochkina Ann, Bespalova Olga
- Сборник: LXXI International conference “Nucleus – 2021. Nuclear physics and elementary particle physics. Nuclear physics technologies”. Saint-Petersburg, 20 – 25 September 2021. Online. Book of Abstracts
- Тезисы
- Год издания: 2021
- Место издания: Saint-Petersburg University Saint-Petersburg
- Первая страница: 72
- Последняя страница: 72
- Аннотация: Neutron halo is one of the most intriguing properties of nuclei with sufficient excess of neutrons.Neutron halo was first observed experimentally in 11Li. The giant neutron halo of more thantwo neutrons was predicted also theoretically in medium and heavy mass nuclei near the neutrondrip line, in particular in Ca, Zr, Ce. The halo and giant halo forms in 186−190Ce and 192−198Ce isotopesrespectively according to the calculations within the relativistic HFB and RMFPC-CMR-BCStheories.We investigated the neutron single-particle structure of Ce isotopes by the dispersive optical model(DOM). The evolution of the neutron single-particle energies was calculated in the assumptionthat diffuseness parameter aHF of the potential increased from 0.65 for 184Ce to 0.8 fm for 198Ce.The halo in Ce isotopes near the neutron drip line forms when neutrons occupy low-l states 4s1/2,3d5/2 and 3d3/2. The calculated root mean square radii Rrms of these states are in the interval approx.from 10 to 12 fm, whereas the radii Rrms of the neighboring states equal to 6 - 7 fm. The totalnumber of neutrons in halo states exceeds 2 for N > 134.
- Добавил в систему: Беспалова Ольга Викторовна