Low-multipolarity magnetic transitions of Si, S, and S were studied by 180' inelastic electron scattering at low momentum transfers (q 0.3 -0.5 fm ). These measurements, made in the excitation energy region from 9 to 14 Mev, revealed several previously unreported levels.These are the first low-q results obtained by electron scattering for Si and S. Multipolarities and transition strengths for all the observed transitions were determined in a model-independent analysis. A large fragmentation of M1 strength is observed in the 4N + 2 nuclei Si and S, while more strength is concentrated into fewer transitions in the self-conjugate nucleus S. The experimental Ml strength distributions are compared with configuration-mixing shell-model calculations. The sums of the transition strengths are in good agreement with recent shell-model calculations using an effective M1 operator. PACS number(s): 25.30.Dh, 23.20.Js, 27.30.+t
Low-multipolarity magnetic transitions in Ca were excited by 180 inelastic electron scattering. Measurements were made in the excitation energy range of 9 to 14 MeV, at low momentum transfers corresponding to q values of 0.3 to 0.5 fm . Multipolarities and transition strengths were determined in a model-independent analysis for all the observed transitions and compared with previous published and unpublished electron scattering data. The experimental Ml strength distributions are compared with configuration-mixing shell-model calculations. PACS number(s): 25.30.Dh, 21.60.Cs, 23.20.Js, 27.40.+z
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