- Henry, TW
- Bentley, MA
- Clark, RM
- Davies, PJ
- Bader, VM
- Baugher, T
- Bazin, D
- Beausang, CW
- Berryman, JS
- Bruce, AM
- Campbell, CM
- Crawford, HL
- Cromaz, M
- Fallon, P
- Gade, A
- Henderson, J
- Iwasaki, H
- Jenkins, DG
- Lee, IY
- Lemasson, A
- Lenzi, SM
- Macchiavelli, AO
- Napoli, DR
- Nichols, AJ
- Paschalis, S
- Petri, M
- Recchia, F
- Rissanen, J
- Simpson, EC
- Stroberg, SR
- Wadsworth, R
- Weisshaar, D
- Wiens, A
- Walz, C
- et al.
© 2015 American Physical Society. Background: Triplet energy differences (TED) can be studied to yield information on isospin-non-conserving interactions in nuclei. Purpose: The systematic behavior of triplet energy differences (TED) of T=1, Jπ=2+ states is examined. The A=62 isobar is identified as having a TED value that deviates significantly from an otherwise very consistent trend. This deviation can be attributed to the tentative assignments of the pertinent states in Ga62 and Ge62. Methods: An in-beam γ-ray spectroscopy experiment was performed to identify excited states in Ga62 using Gamma-Ray Energy Tracking In-Beam Nuclear Array with the S800 spectrometer at NSCL using a two-nucleon knockout approach. Cross-section calculations for the knockout process and shell-model calculations have been performed to interpret the population and decay properties observed. Results: Using the systematics as a guide, a candidate for the transition from the T=1, 2+ state is identified. However, previous work has identified similar states with different Jπ assignments. Cross-section calculations indicate that the relevant T=1, 2+ state should be one of the states directly populated in this reaction. Conclusions: As spins and parities were not measurable, it is concluded that an unambiguous identification of the first T=1, 2+ state is required to reconcile our understanding of TED systematics.