The low-energy spectroscopy of odd-A nuclei in the mass region A{~}219--229 is modeled by coupling states of a deformed shell model including octupole deformation to a reflection-asymmetric rotor core. Theory and experiment are compared for the nuclei in which data are available: ²¹⁹,221,223,225Rn, ²²¹,223,225,227Fr, 219,221,223,225,227Ra, 219,223,225,227,229Ac 221,223,225,227,229Th, and ²²⁹Pa. Overall agreement requires an octupole deformation β₃{~}0.1. The results throughout the region are synthesized to evaluate the model.
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Leander et al. (1988) studied this question.
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