The discovery of a prolate-oblate-spherical shape triple of spin 0(+) states in the atomic nucleus Pb-186

• Published in: Nuclear physics. A Vol. 682; p. 482C
• Main Authors: Andreyev, A. N., Huyse, M., Van Duppen, P., Weissman, L., Ackermann, D., Gerl, J., Hessberger, F. P., Hofmann, S., Kleinbohl, A., Munzenberg, G., Reschitko, S., Schlegel, C., Schaffner, H., Cagarda, P., Matos, M., Saro, S., Keenan, A., Moore, C. J., O'Leary, C. D., Page, R. D., Taylor, M. J., Kettunen, H., Leino, M., Lavrentiev, A., Wyss, Ramon, Heyde, K.
• Format: Journal Article
• Language: English
• Published: 12-02-2001
• Subjects: alpha-decay; coexistence; isotopes
• ISSN: 0375-9474; 1873-1554
• DOI: 10.1016/S0375-9474(00)00676-X

Two excited J(pi)=0(+) states in Pb-186 populated in the a-decay of Po-190 have been identified through alpha -particle/conversion electron coincidences in an experiment at the velocity filter SHIP. The parent Po-190 nuclei have been produced in the Nd-142(Cr-52,4n)Po-190 complete fusion reaction, alpha -particle energies and branching ratios have been measured and hindrance factors were deduced. The observed states have been interpreted as the band heads of the known prolate and (yet unobserved) oblate rotational bands in Pb-186.