Eur. Phys. J. A 13, 435-448 (2002)
DOI: 10.1140/epja/iepja1221

Lifetimes in the ground-state band and the structure of

A.A. Pasternak^{1, 2}, J. Srebrny², A.D. Efimov¹, V.M. Mikhajlov³, E.O. Podsvirova¹, Ch. Droste², T. Morek², S. Juutinen⁴, G.B. Hagemann⁵, M. Piiparinen⁴, S. Törmänen⁵ and A. Virtanen<sup>4

1</sup>  Cyclotron Laboratory, A.F. Ioffe Physical Technical Institute, 194021, St. Petersburg, Russia
²  Nuclear Physics Division, IEP, Warsaw University, Hoza 69, 00-681 Warsaw, Poland
³  Physical Institute of St. Petersburg State University, 198904, St. Petersburg, Russia
⁴  Department of Physics, University of Jyväskylä, P.O Box 35, FIN-40351, Jyväskylä, Finland
⁵  The Niels Bohr Institute, Blegdamsvej 17, DK-2100, Copenhagen, Denmark

(Received: 7 June 2001 / Revised version: 28 January 2002 Communicated by D. Schwalm)

Abstract
Lifetimes of excited states in ¹¹⁸Te have been measured using the Doppler Shift Attenuation (DSA) and Recoil Distance (RD) methods in the ¹⁰⁹Ag( ¹³C, p3n) reaction at a beam energy of 54 MeV. Lifetime values of the ground-state band levels with spins have been obtained. The excitation energies and B(E2) values are interpreted in the framework of a version of IBFM ( ) with the maximum boson number exceeding its standard value. A satisfactory agreement with experimental level scheme and B(E2) values for the ground-state band is achieved.

PACS
21.10.Tg - Lifetimes.
21.60.Fw - Models based on group theory.
23.20.Lv - Gamma transitions and level energies.
27.60.+j - .

© Società Italiana di Fisica, Springer-Verlag 2002