Author/Authors :
J.A. Cameron، نويسنده , , E. J. Jonkman، نويسنده , , C.E. Svensson، نويسنده , , M. Gupta، نويسنده , , G. Hackman، نويسنده , , Susan D. Hyde، نويسنده , , S.M. Mullins، نويسنده , , J.L. Rodriguez، نويسنده , , J.C. Waddington، نويسنده , , A. Galindo-Uribarri، نويسنده , , H.R. Andrews، نويسنده , , G.C. Ball، نويسنده , , V.P. Janzen، نويسنده , , D.C. Radford، نويسنده , , D. Ward، نويسنده , , T.E. Drake، نويسنده , , M. Cromaz، نويسنده , , J. DeGraaf، نويسنده , , G. Zwartz، نويسنده ,
Abstract :
High-spin states of the nucleus 48Cr have been studied via particle-γ-γ spectroscopy, following the 28Si(28Si,2α) reaction. A 44-element particle-detector array was used to isolate 48Cr residues and to reduce γ-ray Doppler broadening. The collective band built upon the ground state has now been firmly established to spin 16+, the highest possible in the isolated f72 shell, and lifetimes of the four highest states have been measured from Doppler shifts. Although some of the ground-state band properties are well reproduced by recent fp-shell model calculations, a sharp reduction in E2 transition rates at the backbend is not.
