In:
Chinese Physics Letters, IOP Publishing, Vol. 36, No. 6 ( 2019-05-01), p. 062101-
Abstract:
Traditional “magic numbers” were once regarded as immutable throughout the nuclear chart. However, unexpected changes were found for unstable nuclei around N = 20. With both proton and neutron numbers around the magic number of 20, the neutron-rich 39 Cl isotope provides a good test case for the study of the quantum-state evolution across the major shell. In the present work, the negative parity states in 39 Cl are investigated through the β decay spectroscopy of 39 S. Newly observed γ transitions together with a new state are assigned into the level scheme of 39 Cl. The spin parity of 5/2 − for the lowest negative parity state in 39 Cl is reconfirmed using the combined γ transition information. These systematic observations of the negative parity states in 39 Cl allow a comprehensive comparison with the theoretical descriptions. The lowest 5/2 − state in 39 Cl remains exotic in terms of comparisons with existing theoretical calculations and with the neighboring isotopes having similar single-particle configurations. Further experimental and theoretical investigations are suggested.
Type of Medium:
Online Resource
ISSN:
0256-307X
,
1741-3540
DOI:
10.1088/0256-307X/36/6/062101
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2019
detail.hit.zdb_id:
2040565-0
SSG:
6,25
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