Isomeric Character of the Lowest Observed State in
Journal Article
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· Physical Review Letters
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- Florida State Univ., Tallahassee, FL (United States). Dept. of Physics
- Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab., Dept. of Physics and Astronomy
- Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.
- National Heavy Ion Accelerator (GANIL), Caen (France)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Nuclear Science Division
- Michigan State Univ., East Lansing, MI (United States). National Superconducting Cyclotron Lab.; Central Michigan Univ., Mount Pleasant, MI (United States). Dept. of Physics
Previous experiments observed a 4+ state in the N=28 nucleus S44 and suggested that this state may exhibit a hindered E2-decay rate, inconsistent with being a member of the collective ground state band. We populate this state via two-proton knockout from a beam of exotic Ar46 projectiles and measure its lifetime using the recoil distance method with the GRETINA γ-ray spectrometer. The result, 76(14)stat(20)syst ps, implies a hindered transition of B(E2;4+→2$$+\atop{1}$$)=0.61(19) single-particle or Weisskopf units strength and supports the interpretation of the 4+ state as a K=4 isomer, the first example of a high-K isomer in a nucleus of such low mass.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Grant/Contract Number:
- AC02-05CH11231; NA0000979; PHY-1064819; PHY-1401574; PHY-1102511
- OSTI ID:
- 1379702
- Alternate ID(s):
- OSTI ID: 1341936
- Journal Information:
- Physical Review Letters, Vol. 118, Issue 5; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 10 works
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