The challenging first direct measurement of the 65 keV resonance strength in the $^{17}$O(p,$γ$)$^{18}$F reaction at LUNA
Fuente:
arXiv
Guardado en:
| Autores principales: | , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866918154816454656 |
|---|---|
| author | Piatti, D. Collaboration, LUNA |
| author_facet | Piatti, D. Collaboration, LUNA |
| contents | A precise determination of the proton capture rates on oxygen is mandatory to predict the abundance ratios of oxygen isotopes in a stellar environment where the hydrogen burning is active. The 17O(p,γ)18F reaction, in particular, plays a crucial role in AGB nucleosynthesis as well as in explosive hydrogen burning occurring in novae and type I supernovae. At the temperature of interest for the former scenario (from 20 MK to 80 MK) the main contribution to the astrophysical reaction rate comes from the Er = 64.5 keV resonance. The strength of this resonance is presently determined only through indirect measurements, with an adopted value ωγ = 16(3) peV. A new high sensitivity setup has been installed at LUNA, located at Laboratori Nazionali del Gran Sasso. The underground location of LUNA 400kV guarantees a reduction of the cosmic ray background by several orders of magnitude. The residual background was further reduced by a dedicated shielding. On the other hand the 4πBGO detector efficiency was optimized installing an aluminum target chamber and holder. With about 400 C accumulated on Ta2O5 targets, highly enriched in 17O, the LUNA collaboration has performed the first ever direct measurement of the 64.5 keV resonance strength. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_04597 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | The challenging first direct measurement of the 65 keV resonance strength in the $^{17}$O(p,$γ$)$^{18}$F reaction at LUNA Piatti, D. Collaboration, LUNA Nuclear Experiment A precise determination of the proton capture rates on oxygen is mandatory to predict the abundance ratios of oxygen isotopes in a stellar environment where the hydrogen burning is active. The 17O(p,γ)18F reaction, in particular, plays a crucial role in AGB nucleosynthesis as well as in explosive hydrogen burning occurring in novae and type I supernovae. At the temperature of interest for the former scenario (from 20 MK to 80 MK) the main contribution to the astrophysical reaction rate comes from the Er = 64.5 keV resonance. The strength of this resonance is presently determined only through indirect measurements, with an adopted value ωγ = 16(3) peV. A new high sensitivity setup has been installed at LUNA, located at Laboratori Nazionali del Gran Sasso. The underground location of LUNA 400kV guarantees a reduction of the cosmic ray background by several orders of magnitude. The residual background was further reduced by a dedicated shielding. On the other hand the 4πBGO detector efficiency was optimized installing an aluminum target chamber and holder. With about 400 C accumulated on Ta2O5 targets, highly enriched in 17O, the LUNA collaboration has performed the first ever direct measurement of the 64.5 keV resonance strength. |
| title | The challenging first direct measurement of the 65 keV resonance strength in the $^{17}$O(p,$γ$)$^{18}$F reaction at LUNA |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2510.04597 |