Isobaric analog resonances of Mg-31 and the border of the island of inversion
(2014) In Physical Review C (Nuclear Physics) 90(1).- Abstract
- The evolution of the nuclear shell structure in the region of the neutron-rich shell-breaking nucleus Mg-32 has been the subject of considerable interest. We present here the first determination of the overlap of the ground and two first excited states in Mg-31 with a neutron coupled to the ground state in Mg-30 based on studies of its isobaric analog resonances in Al-31. The excitation function for proton resonant elastic scattering on Mg-30 was measured close to 0 degrees in the laboratory frame by bombarding a thick polyethylene target with a Mg-30 beam at an energy of 2.92 MeV/nucleon at the REX-ISOLDE facility at CERN. Three resonances were successfully resolved, and angular momenta and total and proton resonance widths were... (More)
- The evolution of the nuclear shell structure in the region of the neutron-rich shell-breaking nucleus Mg-32 has been the subject of considerable interest. We present here the first determination of the overlap of the ground and two first excited states in Mg-31 with a neutron coupled to the ground state in Mg-30 based on studies of its isobaric analog resonances in Al-31. The excitation function for proton resonant elastic scattering on Mg-30 was measured close to 0 degrees in the laboratory frame by bombarding a thick polyethylene target with a Mg-30 beam at an energy of 2.92 MeV/nucleon at the REX-ISOLDE facility at CERN. Three resonances were successfully resolved, and angular momenta and total and proton resonance widths were determined by using R-matrix analysis. The deduced spectroscopic factor for the ground state in Mg-31 is consistent with the shell-model calculation, whereas those for the first and second excited states could not be reproduced. These results show that a drastic change in structure occurs between Mg-30 and Mg-31 and that the onset of structural change in this region therefore occurs between these two isotopes. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4667839
- author
- Imai, N. ; Mukai, M. ; Cederkäll, Joakim LU ; Aghai, H. ; Golubev, Pavel LU ; Johansson, H. T. ; Kahl, D. ; Kurcewics, J. ; Teranishi, T. and Watanabe, Y. X.
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review C (Nuclear Physics)
- volume
- 90
- issue
- 1
- article number
- 011302
- publisher
- American Physical Society
- external identifiers
-
- wos:000339919800001
- scopus:84905178839
- ISSN
- 0556-2813
- DOI
- 10.1103/PhysRevC.90.011302
- language
- English
- LU publication?
- yes
- id
- 56aa0f14-5afb-4c6e-bfd5-86a768c1e41f (old id 4667839)
- date added to LUP
- 2016-04-01 14:00:24
- date last changed
- 2022-01-27 22:17:08
@article{56aa0f14-5afb-4c6e-bfd5-86a768c1e41f, abstract = {{The evolution of the nuclear shell structure in the region of the neutron-rich shell-breaking nucleus Mg-32 has been the subject of considerable interest. We present here the first determination of the overlap of the ground and two first excited states in Mg-31 with a neutron coupled to the ground state in Mg-30 based on studies of its isobaric analog resonances in Al-31. The excitation function for proton resonant elastic scattering on Mg-30 was measured close to 0 degrees in the laboratory frame by bombarding a thick polyethylene target with a Mg-30 beam at an energy of 2.92 MeV/nucleon at the REX-ISOLDE facility at CERN. Three resonances were successfully resolved, and angular momenta and total and proton resonance widths were determined by using R-matrix analysis. The deduced spectroscopic factor for the ground state in Mg-31 is consistent with the shell-model calculation, whereas those for the first and second excited states could not be reproduced. These results show that a drastic change in structure occurs between Mg-30 and Mg-31 and that the onset of structural change in this region therefore occurs between these two isotopes.}}, author = {{Imai, N. and Mukai, M. and Cederkäll, Joakim and Aghai, H. and Golubev, Pavel and Johansson, H. T. and Kahl, D. and Kurcewics, J. and Teranishi, T. and Watanabe, Y. X.}}, issn = {{0556-2813}}, language = {{eng}}, number = {{1}}, publisher = {{American Physical Society}}, series = {{Physical Review C (Nuclear Physics)}}, title = {{Isobaric analog resonances of Mg-31 and the border of the island of inversion}}, url = {{http://dx.doi.org/10.1103/PhysRevC.90.011302}}, doi = {{10.1103/PhysRevC.90.011302}}, volume = {{90}}, year = {{2014}}, }