Abstract.
Band structures of the 123Cs nucleus have been investigated using the 100Mo(28Si, p4n) reaction at a beam energy of 130 MeV. The previously observed rotational bands based on \ensuremath{\pi} h 11/2, \ensuremath{\pi} g 7/2 and \ensuremath{\pi} g 9/2 orbitals have been extended. The excitation energies of these bands have been established with the help of interband transitions and those connecting to the low-energy levels established from the \ensuremath{\beta} + /EC decay of 123Ba (T 1/2 = 2.7 m). The bandhead of the \ensuremath{\pi} g 9/2 band at the 328.1 keV (\(I^{\ensuremath{\pi}} = 9/2^{ + }\)) is proposed to be isomeric following arguments based on the intensity balance of the feeding and de-exciting \ensuremath{\gamma} transitions. New multiquasiparticle bands based on \ensuremath{\pi} \(h_{11/2}\otimes \ensuremath{\nu}h_{11/2} \otimes \nu g_{7/2}\), \ensuremath{\pi} \(g_{7/2} \otimes \pi(h_{11/2})^{2}\) and \ensuremath{\pi} \(g_{7/2} \otimes \pi (h_{11/2})^{2} \otimes \nu(h_{11/2})^{2}\) configurations have been identified.
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Communicated by D. Schwalm
Received: 24 May 2004, Published online: 7 September 2004
PACS:
21.10.Re Collective levels - 23.20.Lv \ensuremath{\gamma} transitions and level energies - 21.60.-n Nuclear strucutre models and methods - 27.60. + j \(90 \leq A \leq 149\)
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Singh, K., Goswamy, J., Mehta, D. et al. Band structures of the 123Cs nucleus. Eur. Phys. J. A 21, 359–363 (2004). https://doi.org/10.1140/epja/i2004-10064-2
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DOI: https://doi.org/10.1140/epja/i2004-10064-2