Eur. Phys. J. A (2003) 20: 57-58
https://doi.org/10.1140/epja/i2003-10194-y

The three-hole isomeric state and octupole core excitation in the ²⁰⁵ Tl nucleus

¹ Niewodniczański Institute of Nuclear Physics, PL-31-342, Kraków, Poland
² Physics Division, Argonne National Laboratory, IL 60439, Argonne, USA
³ Dipartimento di Fisica dell’Universitá and INFN Sezione di Padova, I-35131, Padova, Italy
⁴ INFN Laboratori Nazionali di Legnaro, I-35020, Legnaro, Italy
⁵ Hahn-Meitner Institute, D-14109, Berlin, Germany

^* e-mail: Jacek.Wrzesinski@ifj.edu.pl

Abstract

New high-spin states were identified in the ²⁰⁵Tl isotope produced in deep-inelastic heavy-ion reactions. The expected 29/2 ⁺ yrast state and 35/2^- isomeric state with 235 ns half-life were located above the 2.6 μs isomer known from previous studies. Above this isomer a 7092 keV level was interpreted as a 41/2 ⁺ state arising from the coupling of the octupole vibration of the ²⁰⁸Pb core with the three-hole structure of the 35/2^- isomer.