Eur. Phys. J. A (2004) 20: 381-384
https://doi.org/10.1140/epja/i2004-10023-y

Letter

First observation of excited states in the ¹¹⁰Mo nucleus

¹ Faculty of Physics, Warsaw University, ul. Hoża 69, PL-00-681, Warsaw, Poland
² Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-CNRS/Université Joseph Fourier, F-38026, Grenoble Cedex, France
³ Schuster Laboratory, Department of Physics and Astronomy, University of Manchester, M13 9PL, Manchester, UK
⁴ Argonne National Laboratory, IL 60439, Argonne, USA
⁵ Institut de Recherches Subatomiques UMR7500, CNRS-IN2P3 et Université Louis Pasteur, F-67037, Strasbourg, France

^* e-mail: urban@fuw.edu.pl

Abstract

The ground-state band in ¹¹⁰Mo has been observed for the first time. The band, comprising six levels, has been populated in the spontaneous fission of ²⁴⁸Cm and studied by means of prompt -ray spectroscopy using the EUROGAM2 array. The ratio suggests that the deformation of ¹¹⁰Mo is smaller than that in ¹⁰⁸Mo but may stabilize at higher neutron number, where an oblate shape is expected. The new data suggests that the deformation of Sr and Zr isotopes decreases above neutron number N = 64.