De Witte, Hilde × Eeckhaudt, S. Andreyev, A. N. Borzov, I. N. Cederkall, J. De Smet, A. # Fedorov, D. V. Fedoseyev, V. N. Franchoo, S. Gorska, M. Grawe, H. # Huber, G. # Huyse, Mark # Janas, Z. # Koster, U. # Kurcewicz, W. # Kurpeta, J. # Płochocki, A. # Van de Vel, K. # Van Duppen, Piet Weissman, L. #
Published for the American Physical Society by the American Institute of Physics
Physical Review C, Nuclear Physics vol:87 issue:6
This Brief Report reports on the first observation of the
β− delayed γ decay of 215Pb, feeding states in 215Bi.
The 215Pb beam was produced using resonant laser ionization and mass separated at the ISOLDE-CERN on-line mass separator. This ensured clean identification of theγrays as belonging to the decay of 215Pb or its β-decay daughters. A half-life of 147(12) s was measured for the 215Pb β decay and a level scheme for the daughter nucleus 215Bi is proposed, resulting in an extended systematics of the excited states of the neutron-rich Bi isotopes.