Eur. Phys. J. A 10, 123-127

Ground-state spin of

M. Oinonen¹, U. Köster¹, J. Äystö¹, V. Fedoseyev², V. Mishin², J. Huikari³, A. Jokinen³, A. Nieminen³, K. Peräjärvi³, A. Knipper⁴ and G. Walter the ISOLDE Collaboration<sup>4

1</sup>  EP Division, CERN, CH-1211 Geneva 23, Switzerland
²  Institute of Spectroscopy, Russian Academy of Sciences, RU-142092 Troitsk, Russia
³  Department of Physics, University of Jyväskylä, FIN-40351 Jyväskylä, Finland
⁴  Institut de Recherches Subatomiques, F-67037 Strasbourg Cedex 2, France

Markku.Oinonen@cern.ch

(Received: 17 November 2000 / Revised version: 6 February 2001 Communicated by D. Guerreau)

Abstract
Beta-decay of has been studied at PSB-ISOLDE, CERN. The intense and pure Mn beam was produced using the Resonance Ionization Laser Ion Source (RILIS). Based on the measured -decay rates the ground-state spin and parity are proposed to be = 5/2^-. This result is consistent with the systematic trend of the odd-A Mn nuclei and extends the systematics one step further towards the neutron drip line.

PACS
21.10.-k - Properties of nuclei; nuclear energy levels.
23.40.-s - Beta decay.
27.50.+e - 59 89.

© Società Italiana di Fisica, Springer-Verlag 2001