Beta-decay studies of neutron-rich Sc- Cr nuclei

L. Gaudefroy; O. Sorlin; C. Donzaud; J. C. Angélique; F. Azaiez; C. Bourgeois; V. Chiste; Z. Dlouhy; S. Grévy; D. Guillemaud-Mueller; F. Ibrahim; K. -L. Kratz; M. Lewitowicz; S. M. Lukyanov; I. Matea; J. Mrasek; F. Nowacki; F. de Oliveira Santos; Yu. -E. Penionzhkevich; B. Pfeiffer; F. Pougheon; M. G. Saint-Laurent; M. Stanoiu

doi:10.1140/epja/i2004-10068-x

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A (2005) 23: 41-48
https://doi.org/10.1140/epja/i2004-10068-x

Beta-decay studies of neutron-rich Sc- Cr nuclei

L. Gaudefroy¹, O. Sorlin¹^*, C. Donzaud¹, J. C. Angélique², F. Azaiez¹, C. Bourgeois¹, V. Chiste¹, Z. Dlouhy³, S. Grévy², D. Guillemaud-Mueller¹, F. Ibrahim¹, K. -L. Kratz⁴, M. Lewitowicz⁵, S. M. Lukyanov⁶, I. Matea⁵, J. Mrasek³, F. Nowacki⁷, F. de Oliveira Santos⁵, Yu. -E. Penionzhkevich⁷, B. Pfeiffer⁴, F. Pougheon¹, M. G. Saint-Laurent⁵ and M. Stanoiu¹

¹ Institut de Physique Nucléaire, IN2P3-CNRS, F-91406, Orsay Cedex, France
² ISMRA, LPC, F-14050, Caen Cedex, France
³ Nuclear Physics Institute, AS CR, CZ-25068, Rez, Czech Republic
⁴ Institut für Kernchemie, Universität Mainz, D-55128, Mainz, Germany
⁵ GANIL, B.P. 5027, F-14076, Caen Cedex, France
⁶ JINR, FLNR, 141980, Dubna, Moscow region, Russia
⁷ IReS, IN2P3-CNRS, Université Louis Pasteur, BP 28, F-67037, Strasbourg Cedex, France

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

Received: 20 April 2004
Accepted: 28 July 2004
Published online: 19 November 2004

Abstract

The neutron-rich nuclei ₂₁ ^{57, 58}Sc, ₂₂ ^58-60Ti, ₂₃ ^60-63V, ₂₄ ^62-66Cr have been produced at Ganil via interactions of a 61.8A MeV ⁷⁶Ge beam with a ⁵⁸Ni target. Beta-decay studies have been performed using combined β- and γ-ray spectroscopy. Half-lives have been determined and β-decay schemes are proposed for ⁵⁸Ti, ⁶¹V and ⁶²Cr. From these studies, new hints for the existence of β-decaying isomers in ⁶⁰V and in ⁶²Mn are provided. These results are compared to shell model calculations. The role of the πf _7/2- νf _5/2 proton-neutron interaction is examined through its influence on the lifetime values.