Eur. Phys. J. A (2005) 25: 111-113
https://doi.org/10.1140/epjad/i2005-06-179-8

ENAM 2004

Observation of the 0⁺ ₂ state in ⁴⁴S

¹ Laboratoire de Physique Corpusculaire, IN2P3-CNRS, ENSICAEN and Université de Caen, F-14050, Caen cedex, France
² Institute of Atomic Physics, IFIN-HH, P.O. Box MG6, Bucharest-Magurele, Romania
³ Grand Accelérateur National d’Ions Lourds, CEA/DSM-CNRS/IN2P3, BP 5027, F-14076, Caen cedex, France
⁴ CEA/DIF/DPTA/PN, BP 12, 91680, Bruyères le Châtel, France
⁵ IReS, IN2P3/ULP, 23 rue du Loess, BP 20, F-67037, Strasbourg, France
⁶ Nuclear Physics Institute, CZ-25068, Rez, Czech Republic
⁷ FLNR, JINR, 141980, Dubna, Russia
⁸ CEA Saclay, DAPNIA/SPhN, F-91191, Gif-sur-Yvette, France
⁹ Institut de Physique Nucléaire d’Orsay, IN2P3-CNRS, F-91406 Orsay cedex, France

^* e-mail: grevy@in2p3.fr

Received: 1 February 2005
Accepted: 3 May 2005
Published online: 28 July 2005

Abstract

We report preliminary results on the observation of the isomeric 0⁺ ₂ state in ⁴⁴S. This state, populated in the fragmentation of a ⁴⁸Ca beam, is located at 1365±1 keV and has a half-life of 2.3±0.3 μs. The observation of this isomer is the first experimental evidence of shape coexistence in ⁴⁴S which was predicted by various theoretical approaches. In particular, we found a good agreement with shell model calculations.