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Title: Effect of Weak Binding on the Apparent Spin-Orbit Splitting in Nuclei

The apparent splitting between orbitals that are spin-orbit partners can be substantially influenced by the effects of weak binding. In particular, such effects can account for the observed decrease in separation of the neutron $$1{p}_{3/2}$$ and $$1{p}_{1/2}$$ orbitals between the $$^{41}\mathrm{Ca}$$ and $$^{35}\mathrm{Si}$$ isotopes. This behavior has been the subject of recent experimental and theoretical works and cited as evidence for a proton “bubble” in $$^{34}\mathrm{Si}$$ causing an explicit weakening of the spin-orbit interaction. The results reported in this paper suggest that the change in the separation between the $$1{p}_{3/2}$$ and $$1{p}_{1/2}$$ partners occurs dominantly because of the behavior of the energies of these $1p$ neutron states near zero binding.
Authors:
 [1] ;  [1] ;  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
Publication Date:
Grant/Contract Number:
AC02-06CH11357; AC52-07NA27344
Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 119; Journal Issue: 18; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); 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:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear many-body theory; shell model; nuclear binding
OSTI Identifier:
1466274
Alternate Identifier(s):
OSTI ID: 1406158