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Updated: Jun 19, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
Published on: December 3, 2013
Coherent contributions to isospin mixing in the mirror pair 67As and 67Se
R Orlandi1, G de Angelis, P G Bizzeti
1Laboratori Nazionali di Legnaro dell'INFN, Legnaro (Padova), I-35020, Italy. Riccardo.Orlandi@uws.ac.uk
Abstract:
Isospin symmetry breaking has been investigated in mass A=67 mirror nuclei through the experimental determination of the E1 strengths of analog electromagnetic transitions. Lifetimes of excited states have been measured in (67)Se and (67)As with the centroid shift method. Through the comparison of the B(E1) strengths of the mirror 9/2(+)-->7/2(-) transitions, the isovector and the isoscalar components of the electromagnetic transition amplitude were extracted. The presence of a large isoscalar component provides evidence for coherent contributions to isospin mixing, probably involving the isovector giant monopole resonance.
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