Low-energy excited states of 210Ra and 208Ra were investigated at the Wright Nuclear Structure Laboratory of Yale University. Fusion evaporation recoils were selected using the gas-filled spectrometer, SASSYER. Delayed γ -rays, following isomeric decays, were detected at the focal plane of SASSYER with a small array of HPGe detectors. Transitions following the proposed J π = 8+ isomers were observed, and the half-lives measured. The experiments are discussed and results compared to expectations from the seniority scheme.
Copyright © 2005 IOP Publishing, Ltd. This article first appeared in Journal of Physics G: Nuclear and Particle Physics 31, no. 10 (September 12, 2005): S1605-1610. doi:10.1088/0954-3899/31/10/041.
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Ressler, J. J., C. W. Beausang, R. F. Casten, N. V. Zamfir, H. Ai, H. Amro, M. Babilon, R. B. Cakirli, J. A. Caggiano, G. Gürdal, A. Heinz, R. O. Hughes, S. D. Langdown, E. A. McCutchan, D. A. Meyer, C. Plettner, J. Qian, P. H. Regan, M. J S Sciacchitano, N. J. Thomas, E. Williams, and A. Yamamoto. "Isomers and Seniority in the Trans-Pb Nuclei." Journal of Physics G: Nuclear and Particle Physics 31, no. 10 (September 12, 2005): S1605-1610. doi:10.1088/0954-3899/31/10/041.