4.5 Article

Single-particle and dipole excitations in 62Co

期刊

PHYSICAL REVIEW C
卷 105, 期 4, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.105.044315

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资金

  1. U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC02-06CH11357, DE-FG02-94ER40834, DE-FG02-94ER40848, DE-SC0020451, DE-FG02-08ER41556]
  2. NSF [PHY-0606007]
  3. UNC Startup Funds of ADA

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Extensive study of the level structure of 62Co has been conducted using a complex multinucleon transfer reaction. The study observed various level sequences and proposed an interpretation within the framework of the spherical shell model. Two dipole bands with possible magnetic rotation character were found at moderate spins.
An extensive study of the level structure of 62Co has been performed following a complex multinucleon transfer reaction, 26Mg(48Ca, 2??3np?? ) 62Co, at beam energies of 275, 290, and 320 MeV. The combination of the Gammasphere array, the fragment mass analyzer, and a focal-plane ionization chamber was used to identify and delineate excited levels in 62Co. A considerable extension to the 62Co level scheme is proposed with firm spin-parity values assigned on the basis of angular distribution and correlation analyses. Various level sequences built upon states of single-particle character have been observed, and an interpretation of these structures in the framework of the spherical shell model is presented. At moderate spins, two dipole bands have been observed and, based on their phenomenological study, a possible magnetic rotation character is suggested. However, theoretical calculations performed using the particle rotor model support magnetic rotation for only one of these dipole bands.

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