Vibrational and Rotational Sequences in ¹⁰¹Mo and ^103,4Ru Studied via Multinucleon Transfer Reactions

摘要

The near-yrast states of ₄₂¹⁰¹Mo₅₉ and ₄₄^103,4Ru_59,60 have been studied following their population via heavy-ion multinucleon transfer reactions between a ¹³⁶Xe beam and a thin, self-supporting ¹⁰⁰Mo target. The ground state sequence in ¹⁰⁴Ru can be understood as demonstrating a simple evolution from a quasi-vibrational structure at lower spins to statically deformed, quasi-rotational excitation involving the population of a pair of low-Ω h_11∕2 neutron orbitals. The effect of the decoupled h_11∕2 orbital on this vibration-to-rotational evolution is demonstrated by an extension of the “E-GOS” prescription to include odd-A nuclei. The experimental results are also compared with self-consistent Total Routhian Surface calculations which also highlight the polarising role of the highly aligned neutron h_11∕2 orbital in these nuclei.