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Title: Exploiting dissipative reactions to perform in-beam γ-ray spectroscopy of the neutron-deficient isotopes 38,39Ca

Journal Article · · Physical Review. C
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [3];  [2];  [2];  [2];  [4];  [5]; ORCiD logo [6]; ORCiD logo [7]
  1. Michigan State Univ., East Lansing, MI (United States); Michigan State University
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Washington Univ., St. Louis, MO (United States)
  4. Michigan State Univ., East Lansing, MI (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  5. Michigan State Univ., East Lansing, MI (United States); TRIUMF, Vancouver, BC (Canada)
  6. Argonne National Lab. (ANL), Argonne, IL (United States)
  7. Univ. of Surrey, Guildford (United Kingdom)

The neutron-deficient Ca isotopes continue to attract attention due to their importance for testing isospin symmetry and their relevance in capture reactions of interest for nova nucleosynthesis and the shape of light curves in Type I x-ray bursts. To date, spectroscopic information on 38,39Ca is largely limited to data on lower-spin excited states. Here, we report in-beam γ-ray spectroscopy of complementary higher-spin, complex-structure states in 39Ca populated in fast-beam-induced, momentum-dissipative processes leading to neutron pickup onto excited configurations of the projectile, 9Be(38Ca*,39Ca + γ)X. Such a dissipative reaction was recently characterized for the case of inelastic scattering of 38Ca off 9Be, 9Be(38Ca, 38Ca + γ)X. Additional data and discussion on the nuclear structure of 38Ca is also presented. Furthermore, an explanation for the more-complex-structure states, populated with small cross sections in one-nucleon knockout reactions, and observed in the tails of their longitudinal momentum distributions, is also offered.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Nuclear Physics (NP); USDOE Office of Science - Office of Nuclear Physics
Grant/Contract Number:
AC02-06CH11357; FG02-87ER40316; NA0003180; SC0019034; SC0020451
OSTI ID:
1902856
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 6 Vol. 106; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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