K-Isomers in very neutron-rich nuclei around mass 180
Schlegel, C, Regan, P.H., Pfutzner, M, Gerl, J, Hellstrom, M, Podolyak, Zs, Caamano, M, Mayet, P, Aprahamian, A, Benlliure, J, Bruce, A.M., Butler, P.A., Cortina Gil, D, Cullen, D.M., Doring, J, Enqvist, T, Farget, F, Fox, C, Garces Narro, J, Gelletly, W, Giovinazzo, J, Gorska, M, Grawe, H, Grzywacz, R, Kleinbohl, A, Korten, W, Lewitowicz, M, Lucas, R, Mach, H, Minerva, M, O'Leary, C, De Oliveira, F, Pearson, C.J., Rejmund, M, Sawicka, M, Schaffner, H, Schmidt, K, Theisen, Ch, Walker, P.M., Warner, D.D., Wheldon, C, Wollersheim, H.J., Wooding, S and Xu, F (2000) K-Isomers in very neutron-rich nuclei around mass 180 Physica Scripta, T88 (1). pp. 72-76. ISSN 0031-8949
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Gamma-spectroscopy methods have been used to search for microsecond isomers among the fragmentation products of a 1 GeV/nucleon Pb-208 beam. In particular the population of the known K-pi = 35/2(-) isomer in W-179 has been investigated and several new isomeric decays have been found for neutron rich nuclei in the A approximate to 180-200 mass region. The ground state band of the neutron rich N = 116 system of W-190 has been identified for the first time and we discuss its structure in comparison to neighboring systems.
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