ISOVECTOR l-FORBIDDEN M1 TRANSITIONS 2s1/2 <-> 1d3/2 IN LIGHT NUCLEI

摘要

Analysis is given to experimental data on l-forbidden M1 transitions like 2si/2 <-> 1d3/2 observed in the decay of isobaric analogue resonances in odd nuclei with 19≤A≤41. Two l-forbiddenness lifting mechanisms caused by excitation of core-polarization-type states and a giant M1 resonance are proposed. Hindrance factors of isovec-tor l-forbidden M1 transitions in mirror nuclei are shown to be close in value.