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Spectroscopy of $^{50}$Sc and ab initio calculations of $B(M3)$ strengths
- Source :
- Phys. Rev. C 96, 044329 (2017)
- Publication Year :
- 2017
-
Abstract
- The GRIFFIN spectrometer at TRIUMF-ISAC has been used to study excited states and transitions in $^{50}$Sc following the $\beta$-decay of $^{50}$Ca. Branching ratios were determined from the measured $\gamma$-ray intensities, and angular correlations of $\gamma$ rays have been used to firmly assign the spins of excited states. The presence of an isomeric state that decays by an $M3$ transition with a $B(M3)$ strength of 13.6(7)\,W.u. has been confirmed. We compare with the first {\it ab initio} calculations of $B(M3$) strengths in light and medium-mass nuclei from the valence-space in-medium similarity renormalization group approach, using consistently derived effective Hamiltonians and $M3$ operator. The experimental data are well reproduced for isoscalar $M3$ transitions when using bare $g$-factors, but the strength of isovector $M3$ transitions are found to be underestimated by an order of magnitude.
- Subjects :
- Nuclear Experiment
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. C 96, 044329 (2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1710.06338
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevC.96.044329