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A Search for $0^+$ States in $^{50}$Cr: Implications for the Superallowed $��$-decay of $^{50}$Mn
- Publication Year :
- 2016
- Publisher :
- arXiv, 2016.
-
Abstract
- A $^{52}$Cr$(p,t)$$^{50}$Cr two-neutron pickup reaction was performed using the Q3D magnetic spectrograph at the Maier-Leibnitz-Laboratorium in Garching, Germany. Excited states in $^{50}$Cr were observed up to an excitation energy of 5.3 MeV. Despite significantly increased sensitivity and resolution over previous work, no evidence of the previously assigned first excited $0^+$ state was found. As a result, the $0^+_2$ state is reassigned at an excitation energy of $E_x=3895.0(5)$ keV in $^{50}$Cr. This reassignment directly impacts direct searches for a non-analogue Fermi $��^+$ decay branch in $^{50}$Mn. These results also show better systematic agreement with the theoretical predictions for the $0^+$ state spectrum in $^{50}$Cr using the same formalism as the isospin-symmetry-breaking correction calculations for superallowed nuclei. The experimental data are also compared to $ab$-$initio$ shell-model predictions using the IM-SRG formalism based on $NN$ and $3N$ forces from chiral-EFT in the $pf$-shell for the first time.<br />Accepted for Publication in Physical Review C as a Rapid Communication
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi...........3a30bdceb5afc75d1b049487fc7eb791
- Full Text :
- https://doi.org/10.48550/arxiv.1607.02540