Article,

Competing core and single particle excitations in the 2$_1^+$ state in $^44$Ca

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Phys. Lett. B, 559 (3-4): 187--192 (2003)
DOI: 10.1016/S0370-2693(03)00346-0

Abstract

The g factor of the 21+ state in 44Ca has been measured using the transient field technique and Coulomb excitation in inverse kinematics. A positive value of g(21+, 44Ca) = +0.12±0.05 was deduced. The result suggests the (fp)v4 configuration competes with excitations of the 40Ca core. A simple model which considers that the wave function for the 21+ state consists of approximately equal admixtures of spherical four valence neutron configurations and a deformed core configuration accounts for the experimentally observed g factor as well as the previously measured quadrupole moment. © 2003 Published by Elsevier Science B.V.

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