Experimental neutron capture data of 58Ni from the CERN n TOF facility
The 58Ni(n, γ) cross section has been measured at the neutron time of flight facility n TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of...
| Hovedforfatter: | |
|---|---|
| Format: | Article |
| Sprog: | engelsk |
| Udgivet: |
Physical Review C
2025
|
| Online adgang: | https://repository.auw.edu.bd/handle/123456789/927 |
| _version_ | 1857448842711007232 |
|---|---|
| author | Meaze, AKM Moinul Haque |
| author_facet | Meaze, AKM Moinul Haque |
| author_sort | Meaze, AKM Moinul Haque |
| collection | institutional Repository |
| description | The 58Ni(n, γ) cross section has been measured at the neutron time of flight facility n TOF
at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been
analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar
temperatures of kT = 5 − 100 keV with uncertainties of less than 6%, showing fair agreement with
recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present
work at 30 keV is 34.2±0.6stat±1.8sys mb, in agreement with latest results and evaluations, but 12%
lower relative to the recent KADoNIS compilation of astrophysical cross sections. When included
in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of
the abundance of 58Ni, with a negligible propagation on heavier isotopes. The reason is that using
both, the old or the new MACS, 58Ni is efficiently depleted by neutron captures. |
| format | Article |
| id | 123456789-927 |
| institution | Asian University for Women |
| language | English |
| publishDate | 2025 |
| publisher | Physical Review C |
| record_format | dspace |
| spelling | 123456789-9272026-02-18T06:15:19Z Experimental neutron capture data of 58Ni from the CERN n TOF facility Meaze, AKM Moinul Haque The 58Ni(n, γ) cross section has been measured at the neutron time of flight facility n TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of kT = 5 − 100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present work at 30 keV is 34.2±0.6stat±1.8sys mb, in agreement with latest results and evaluations, but 12% lower relative to the recent KADoNIS compilation of astrophysical cross sections. When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of 58Ni, with a negligible propagation on heavier isotopes. The reason is that using both, the old or the new MACS, 58Ni is efficiently depleted by neutron captures. 2025-08-04T11:40:18Z 2025-08-04T11:40:18Z 2014 Article https://repository.auw.edu.bd/handle/123456789/927 en application/pdf Physical Review C |
| spellingShingle | Meaze, AKM Moinul Haque Experimental neutron capture data of 58Ni from the CERN n TOF facility |
| title | Experimental neutron capture data of 58Ni from the CERN n TOF facility |
| title_full | Experimental neutron capture data of 58Ni from the CERN n TOF facility |
| title_fullStr | Experimental neutron capture data of 58Ni from the CERN n TOF facility |
| title_full_unstemmed | Experimental neutron capture data of 58Ni from the CERN n TOF facility |
| title_short | Experimental neutron capture data of 58Ni from the CERN n TOF facility |
| title_sort | experimental neutron capture data of 58ni from the cern n tof facility |
| url | https://repository.auw.edu.bd/handle/123456789/927 |
| work_keys_str_mv | AT meazeakmmoinulhaque experimentalneutroncapturedataof58nifromthecernntoffacility |