Quasi-elastic scattering for the nuclear ground state structure: An intriguing case of $^{30}$Si
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2026
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866908817891000320 |
|---|---|
| author | Gupta, Y. K. Maheshwari, B. Prajapati, G. K. Jain, A. K. Hagino, K. Joshi, B. N. Pal, A. Sirswal, N. Singh, Pawan Dubey, S. Desai, V. V. Ranga, V. Katariya, V. B. Patel, D. Vyas, H. Panwar, S. John, B. V. Mazumdar, I. Nayak, B. K. Garg, U. |
| author_facet | Gupta, Y. K. Maheshwari, B. Prajapati, G. K. Jain, A. K. Hagino, K. Joshi, B. N. Pal, A. Sirswal, N. Singh, Pawan Dubey, S. Desai, V. V. Ranga, V. Katariya, V. B. Patel, D. Vyas, H. Panwar, S. John, B. V. Mazumdar, I. Nayak, B. K. Garg, U. |
| contents | Quasi-elastic (QEL) scattering measurements have been performed using the $^{28, 30}$Si projectiles off the $^{90}$Zr target at energies around the Coulomb barrier. Coupled-channels (CC) calculations were carried out in a large parameter space of quadrupole and hexadecapole deformations for the N=Z, $^{28}$Si and N=Z+2, $^{30}$Si nuclei. $^{28}$Si at the N=Z line is observed to be uniquely oblate shaped in its ground state. In contrast, for $^{30}$Si with just two additional neutrons -- oblate, prolate, and spherical CC descriptions are equally compatible with the measurements. To further investigate the nuclear structure evolution with varying neutron number, shell-model calculations were performed. These calculations reveal a sudden change in the nuclear structure aspects at $^{30}$Si in going from $^{28}$Si to $^{30}$Si. Combined reaction and structure analyses consistently indicate that $^{30}$Si does not possess a well-defined intrinsic shape, and it is a potential candidate for ``shape fluctuations" in its ground state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_06580 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quasi-elastic scattering for the nuclear ground state structure: An intriguing case of $^{30}$Si Gupta, Y. K. Maheshwari, B. Prajapati, G. K. Jain, A. K. Hagino, K. Joshi, B. N. Pal, A. Sirswal, N. Singh, Pawan Dubey, S. Desai, V. V. Ranga, V. Katariya, V. B. Patel, D. Vyas, H. Panwar, S. John, B. V. Mazumdar, I. Nayak, B. K. Garg, U. Nuclear Experiment Nuclear Theory Quasi-elastic (QEL) scattering measurements have been performed using the $^{28, 30}$Si projectiles off the $^{90}$Zr target at energies around the Coulomb barrier. Coupled-channels (CC) calculations were carried out in a large parameter space of quadrupole and hexadecapole deformations for the N=Z, $^{28}$Si and N=Z+2, $^{30}$Si nuclei. $^{28}$Si at the N=Z line is observed to be uniquely oblate shaped in its ground state. In contrast, for $^{30}$Si with just two additional neutrons -- oblate, prolate, and spherical CC descriptions are equally compatible with the measurements. To further investigate the nuclear structure evolution with varying neutron number, shell-model calculations were performed. These calculations reveal a sudden change in the nuclear structure aspects at $^{30}$Si in going from $^{28}$Si to $^{30}$Si. Combined reaction and structure analyses consistently indicate that $^{30}$Si does not possess a well-defined intrinsic shape, and it is a potential candidate for ``shape fluctuations" in its ground state. |
| title | Quasi-elastic scattering for the nuclear ground state structure: An intriguing case of $^{30}$Si |
| topic | Nuclear Experiment Nuclear Theory |
| url | https://arxiv.org/abs/2602.06580 |