Eur. Phys. J. A (2004) 21: 375-381
https://doi.org/10.1140/epja/i2003-10222-0

Isospectral superdeformed bands in the N = 46 nuclei ⁸⁸Mo and ⁸⁹Tc

¹ Department of Physics, Royal Institute of Technology, SE-10691, Stockholm, Sweden
² Nuclear Science Division, Lawrence Berkeley National Laboratory, CA 94720, Berkeley, USA
³ Physics Division, Argonne National Laboratory, IL 60439, Argonne, USA
⁴ Department of Chemistry, Washington University, MO 63130, St. Louis, USA

^* e-mail: karin@nuclear.kth.se

Abstract

Superdeformed bands in ⁸⁸Mo and ⁸⁹Tc were populated using ⁴⁰Ca-induced fusion-evaporation reactions on ⁵⁸Ni at a beam energy of 185MeV. Gamma-rays emitted in the reactions were detected using the Gammasphere spectrometer, in coincidence with charged particles detected by the Microball array. A new superdeformed band was assigned to the nucleus ⁸⁸Mo, leading to a revisit of earlier configuration assignments for superdeformed structures in this nucleus. In particular, the theoretical interpretation of a pair of identical (isospectral) superdeformed bands in ⁸⁸Mo/⁸⁹Tc is discussed. The configurations that are assigned to the four SD bands belonging to ⁸⁸Mo have properties that are predicted to be significantly affected by pair correlations.