Abstract
We discuss the effects of the quenching and spreading of the Gamow-Teller (GT) strengths for and due to the mixing of the sd-shell components and the halo effects as well as the -hole contributions. The magnetic dipole (M1) transitions between the isobaric analogue state and the GT states for are studied. It has been found that strong M1 transitions from the IAS occur selectively to several (GT) states.
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