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The spectroscopy and structure of the transitional nucleus219Ra

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Czechoslovak Journal of Physics Aims and scope

Abstract

The interchange of two sets of spins in the level structure of219Ra observed following the alpha decay of223Th and the suggestion that the ground state of219Ra was not observed in the heavy ion reaction spectroscopy208Pb(14C, 3n), allow the correlation of these levels which were previously unconnected. The resulting level structure is interpreted in terms of\(K = \tfrac{1}{2}^ \pm \) and\(K = \tfrac{5}{2}^ \pm \) parity doublet bands which evolve from anomalous rotational structures into vibrational-like structures with alternating spins and parities. The level structure of219Ra is successfully interpreted both in terms of octupole deformed (ε 3=0.08) Nilsson levels and in terms of intermediate coupling using normal Nilsson levels with very strong octupole correlations. The levels in219Ra are then compared to the corresponding levels in a series of isotopic and isotonic nuclei to trace the collapse of octupole-quadrupole deformed nuclear structure into the more degenerate shell-model spectroscopy.

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Sheline, R.K., Kvasil, J., Liang, C.F. et al. The spectroscopy and structure of the transitional nucleus219Ra. Czech J Phys 51, 111–128 (2001). https://doi.org/10.1023/A:1002853416714

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