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Identification of the Lowest $T=2$, $J^{\pi=}0^+$ Isobaric Analog State in $^{52}$Co and Its Impact on the Understanding of $\beta$-Decay Properties of $^{52}$Ni
- Source :
- Phys. Rev. Lett. 117, 182503 (2016)
- Publication Year :
- 2016
-
Abstract
- Masses of $^{52g,52m}$Co were measured for the first time with an accuracy of $\sim 10$ keV, an unprecedented precision reached for short-lived nuclei in the isochronous mass spectrometry. Combining our results with the previous $\beta$-$\gamma$ measurements of $^{52}$Ni, the $T=2$, $J^{\pi}=0^+$ isobaric analog state (IAS) in $^{52}$Co was newly assigned, questioning the conventional identification of IASs from the $\beta$-delayed proton emissions. Using our energy of the IAS in $^{52}$Co, the masses of the $T=2$ multiplet fit well into the Isobaric Multiplet Mass Equation. We find that the IAS in $^{52}$Co decays predominantly via $\gamma$ transitions while the proton emission is negligibly small. According to our large-scale shell model calculations, this phenomenon has been interpreted to be due to very low isospin mixing in the IAS.<br />Comment: Accepted for publication in PRL. 5 pages, 2figures
- Subjects :
- Nuclear Experiment
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 117, 182503 (2016)
- Publication Type :
- Report
- Accession number :
- edsarx.1610.09772
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.117.182503