Abstract

A detailed investigation of the electromagnetic properties of the 49 Cr levels below 3 MeV has been made. The levels were populated by the 46 Ti (α, nγ) 49 Cr reaction at E α =8 MeV. Analysis of measured gamma-ray angular distributions, linear polarizations, and gamma-gamma angular correlations has given the following unique spin and parity assignments: 9/2 - to the 1083-keV level; 1/2 - to the 1703-keV level; 5/2 + to the 2432-keV level; and 7/2 - to the 2503-keV level. In addition, a unique 5/2 assignment has been given to the 2168-keV level. Lifetimes of some levels have been obtained from Doppler-shift attenuation measurements. New or revised values of branching ratios and mixing ratios have been determined for many transitions. The unique 5/2 + assignment to the 2432-keV level and a large B (E2) value obtained for the transition to the 1981-keV 3/2 + level suggest that the 2432-keV level is a member of the K π =3/2 + band built on the 1981-keV level.

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