Mass-23 nuclei in astrophysics
© Published under licence by IOP Publishing Ltd. The formation of mass-23 nuclei by radiative capture is of great interest in astrophysics. A topical problem associated with these isobars is the so-called 22Na puzzle of ONe white dwarf novae, where the abundance of 22Na observed is not as is predict...
| Main Authors: | , , , , , |
|---|---|
| Format: | Conference Paper |
| Published: |
IOPScience
2015
|
| Online Access: | http://iopscience.iop.org/1742-6596/639/1 http://hdl.handle.net/20.500.11937/25981 |
| _version_ | 1848751857137090560 |
|---|---|
| author | Fraser, Paul Amos, K. Canton, L. Karataglidis, S. Svenne, J. Van Der Kniff, D. |
| author_facet | Fraser, Paul Amos, K. Canton, L. Karataglidis, S. Svenne, J. Van Der Kniff, D. |
| author_sort | Fraser, Paul |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © Published under licence by IOP Publishing Ltd. The formation of mass-23 nuclei by radiative capture is of great interest in astrophysics. A topical problem associated with these isobars is the so-called 22Na puzzle of ONe white dwarf novae, where the abundance of 22Na observed is not as is predicted by current stellar models, indicating there is more to learn about how the distribution of elements in the universe occurred. Another concerns unexplained variations in elements abundance on the surface of aging red giant stars. One method for theoretically studying nuclear scattering is the Multi-Channel Algebraic Scattering (MCAS) formalism. Studies to date have used a simple collective-rotor prescription to model the target states which couple to projectile nucleons. While, in general, the target states considered all belong to the ground state rotor band, for some systems it is necessary to include coupling to states outside of this band. Herein we discuss an extension of MCAS to allow coupling of different strengths between such states and the ground state band. This consideration is essential when studying the scattering of neutrons from 22Ne, a necessary step in studying the mass-23 nuclei mentioned above. |
| first_indexed | 2025-11-14T07:59:23Z |
| format | Conference Paper |
| id | curtin-20.500.11937-25981 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:59:23Z |
| publishDate | 2015 |
| publisher | IOPScience |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-259812017-09-13T15:25:12Z Mass-23 nuclei in astrophysics Fraser, Paul Amos, K. Canton, L. Karataglidis, S. Svenne, J. Van Der Kniff, D. © Published under licence by IOP Publishing Ltd. The formation of mass-23 nuclei by radiative capture is of great interest in astrophysics. A topical problem associated with these isobars is the so-called 22Na puzzle of ONe white dwarf novae, where the abundance of 22Na observed is not as is predicted by current stellar models, indicating there is more to learn about how the distribution of elements in the universe occurred. Another concerns unexplained variations in elements abundance on the surface of aging red giant stars. One method for theoretically studying nuclear scattering is the Multi-Channel Algebraic Scattering (MCAS) formalism. Studies to date have used a simple collective-rotor prescription to model the target states which couple to projectile nucleons. While, in general, the target states considered all belong to the ground state rotor band, for some systems it is necessary to include coupling to states outside of this band. Herein we discuss an extension of MCAS to allow coupling of different strengths between such states and the ground state band. This consideration is essential when studying the scattering of neutrons from 22Ne, a necessary step in studying the mass-23 nuclei mentioned above. 2015 Conference Paper http://hdl.handle.net/20.500.11937/25981 10.1088/1742-6596/639/1/012005 http://iopscience.iop.org/1742-6596/639/1 IOPScience unknown |
| spellingShingle | Fraser, Paul Amos, K. Canton, L. Karataglidis, S. Svenne, J. Van Der Kniff, D. Mass-23 nuclei in astrophysics |
| title | Mass-23 nuclei in astrophysics |
| title_full | Mass-23 nuclei in astrophysics |
| title_fullStr | Mass-23 nuclei in astrophysics |
| title_full_unstemmed | Mass-23 nuclei in astrophysics |
| title_short | Mass-23 nuclei in astrophysics |
| title_sort | mass-23 nuclei in astrophysics |
| url | http://iopscience.iop.org/1742-6596/639/1 http://hdl.handle.net/20.500.11937/25981 |