Eur. Phys. J. A (2010) 46: 17-26
https://doi.org/10.1140/epja/i2010-11019-8

Regular Article - Experimental Physics

Observation of the 2^- state in ²⁰⁸Pb with a major s_1/2p_3/2 structure and structure of ten more 2^- states

¹ Max-Planck-Institut für Kernphysik, D-69029, Heidelberg, Germany
² Physik Department E12, Technische Universität München, D-85748, Garching, Germany
³ Fakultät für Physik, Ludwig-Maximilians-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: 28 June 2010
Accepted: 26 July 2010
Published online: 21 August 2010

Abstract

From ²⁰⁸Pb (p, p’) via isobaric analog resonances in ²⁰⁹Bi , at E _x = 6420 keV in the doubly magic nucleus ²⁰⁸Pb , a new state with spin 2^- with half the s _1/2 p _3/2 strength and major g _7/2 f _5/2 , d _3/2 f _5/2 fractions is identified. Ten more 2^- states up to E _x = 7.0 MeV are identified and their structure discussed, among them six states with new spin assignments. The known 6314 1^- state is shown to contain almost the entire s _1/2 p _3/2 strength.