Eur. Phys. J. A (2005) 25: 5-21
https://doi.org/10.1140/epja/i2004-10236-0

Original Article

Low-spin states of doubly odd ¹⁸⁴Au

¹ Institut de Physique Nucléaire, IN2P3-CNRS/Université Paris-Sud, F-91406, Orsay Cedex, France
² Laboratoire de Physique Subatomique et de Cosmologie, IN2P3-CNRS/Université Joseph Fourier, F-38026, Grenoble Cedex, France
³ Institut de Physique Nucléaire, IN2P3-CNRS/Université Claude Bernard, F-69621, Villeurbanne Cedex, France
⁴ Institut de Recherches Subatomiques, IN2P3-CNRS, F-67037, Strasbourg, France
⁵ Institute of Experimental Physics, Warsaw University, ul. Hoza 69, PL-00-681, Warsaw, Poland
⁶ CERN, 1211, Genève 23, Switzerland

^* e-mail: sauvage@ipno.in2p3.fr

Received: 5 November 2004
Accepted: 12 April 2005
Published online: 22 June 2005

Abstract

Low-spin states of ¹⁸⁴Au have been studied using the β⁺/EC decay of ¹⁸⁴Hg. γ-ray and conversion-electron singles spectra were recorded with ¹⁸⁴Hg mass-separated sources. For γ-γ-t and X-γ-t coincidence measurements, mercury nuclei were produced in the ¹⁴⁸Sm + ⁴⁰Ar reaction and transported by a He-jet system. The electron spectra were recorded from ¹⁸⁴Hg sources produced at ISOLDE. A level scheme of ¹⁸⁴Au including 48 transitions is proposed. The experimental results are interpreted in the frame of a semi-microscopic axial-rotor-plus-two-quasiparticle model developed in the context of the HF+BCS approximation.