Eur. Phys. J. A (2010) 44: 233-238
https://doi.org/10.1140/epja/i2010-10965-3

Regular Article - Experimental Physics

Observation of five high-spin members of the g_9/2f_7/2 multiplet in ²⁰⁸Pb

¹ Max-Planck-Institut für Kernphysik, D-69029, Heidelberg, Germany
² Department für Physik, Ludwig-Maximilian-Universität München, D-85748, Garching, Germany
³ Physik Department E12, Technische Universität München, D-85748, Garching, Germany
⁴ Institut für Kernphysik, Universität zu Köln, D-50937, Köln, Germany

^* e-mail: A.Heusler@mpi-hd.mpg.de

Received: 4 February 2010
Revised: 12 March 2010
Accepted: 28 March 2010
Published online: 14 April 2010

Abstract

In the doubly magic nucleus ²⁰⁸Pb , five states are observed at 5648, 5658, 5686, 5694, 5836keV by ²⁰⁸Pb (p, p′) via isobaric analog resonances in ²⁰⁹Bi . The 5686, 5694, 5836 states with spins 6^-, 7^-, 8^- are shown to contain almost the full strength of the particle-hole configuration g _9/2 f _7/2 . The 5658 5^- state contains a major g _9/2 f _7/2 fragment with admixtures of d _5/2 f _5/2 , d _5/2 f _7/2 . The 5648, 5649keV states observed in a quintuplet at E _x = 5.63 - 5.65 MeV are preliminarily identified to have spins (4)^- and 6⁺ to 9⁺. The 5648keV (4)^- state contains almost half of the g _9/2 f _7/2 strength and half of the h _9/2 d _5/2 strength with admixtures of d _5/2 f _5/2 , d _5/2 p _3/2 , d _5/2 f _7/2 .