Gamow–Teller transitions and neutron–proton-pair transfer reactions
We propose a schematic model of nucleons moving in spin–orbit partner levels, j = l ± 1/2, to explain Gamow–Teller and two-nucleon transfer data in N = Z nuclei above 40Ca. Use of the LS coupling scheme provides a more transparent approach to interpret the structure and reaction data. We apply the model to the analysis of charge-exchange, 42Ca( 3He,t) 42Sc, and np-transfer, 40Ca( 3He,p) 42Sc, reactions data to define the elementary modes of excitation in terms of both isovector and isoscalar pairs, whose properties can be determined by adjusting the parameters of the model (spin–orbit splitting, isovector pairing strength and quadrupole matrix element) to the available data. The overall agreement with experiment suggests that the approach captures the main physics ingredients and provides the basis for a boson approximation that can be extended to heavier nuclei. Lastly, our analysis also reveals that the SU(4)-symmetry limit is not realized in 42Sc.
- Authors:
-
[1]
; [2]
- CEA/DRF-CNRS/IN2P3, Caen (France)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Grant/Contract Number:
- AC02-05CH11231; FG02-10ER41700
- Type:
- Published Article
- Journal Name:
- Physics Letters. Section B
- Additional Journal Information:
- Journal Volume: 780; Journal Issue: C; Related Information: © 2018 The Authors; Journal ID: ISSN 0370-2693
- Publisher:
- Elsevier
- Research Org:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org:
- USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS
- OSTI Identifier:
- 1426825
- Alternate Identifier(s):
- OSTI ID: 1462000