Collectivity and single-particle degrees of freedom

P. Bednarczyk; J. Styczeń; A. Bracco; D. Curien; J. Grebosz; M. Lach; A. Maj; J. C. Merdinger; W. Meczyński; F. Nowacki; M. B. Smith; K. Spohr; J. P. Vivien; M. Ziebliński

doi:10.1140/epja/i2002-10319-x

EPJ

Collectivity and single-particle degrees of freedom

Studies of light f _7/2 nuclei at EUROBALL IV and recoil filter detector

P. Bednarczyk¹^,2^*, J. Styczeń², A. Bracco³, D. Curien¹, J. Grebosz², M. Lach², A. Maj², J. C. Merdinger¹, W. Meczyński², F. Nowacki¹, M. B. Smith⁴, K. Spohr⁴, J. P. Vivien¹ and M. Ziebliński²

¹ Institut de Recherches Subatomiques, Strasbourg, France
² H. Niewodniczański Institute of Nuclear Physics, Kraków, Poland
³ Universitá degli Studi di Milano and INFN, Milano, Italy
⁴ University of Paisley, Paisley, Scotland, UK

Abstract

Intruder rotational bands in ⁴⁵ Sc and ⁴⁵ Ti have been investigated up to the maximum aligned angular momentum by means of EUROBALL IV and the Recoil Filter Detector (RFD). The use of the RFD allowed for a reduction of the

-line Doppler broadening and, moreover, for a determination of very short level lifetimes. In the studied nuclei, the estimated deformation shows a gradual disappearance of the collectivity at the highest available spins.

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