Complete Spectroscopy of negative parity states in ²⁰⁸Pb with E_x < 6.3 MeV

¹ Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
² Physik Department E12, Technische Universität München, D-85748 Garching, Germany
³ Department für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
⁴ Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany

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

Published online: 20 March 2014

Abstract

Using the Q3D magnetic spectrograph at the Maier-Leibnitz-Laboratorium, Garching, experiments with the ²⁰⁸Pb(p, p′) reaction via isobaric analog resonances and using the ²⁰⁷Pb(d, p) reaction have been performed with a HWHM of 1.5 keV on the low energy side. All 70 particle-hole states with negative parity predicted by the schematic shell model without residual interaction below E_x = 6.3 MeV are identified. Except for the states with spins 1⁻ and 2⁻, more than 80% of the strength in each state can be described by at most four configurations; for spins 0⁻, 4⁻, 6⁻, 7⁻, and 8⁻ two configurations or even one configuration describe more than 95% of the strength. Natural parity configurations are more strongly mixed than unnatural parity configurations.