Spin-parity of the 6764 keV and 6872 keV levels in 34Si

Ascertain the spin-parity of the 6764 keV and 6872 keV excited levels in 34Si by determining whether these states are 2+ or 1+ based on definitive experimental evidence beyond the current β-decay and γ-ray observations.

Background

Two strong ground-state γ-ray transitions at 6763 keV and 6872 keV were observed, corresponding to levels at 6764 keV (previously known) and 6872 keV (new). Their population patterns suggest low spins consistent with β decay from the 34Al 1+ isomer. While the data favor 2+ assignments, the authors explicitly note that 1+ cannot be ruled out, leaving the spin-parity unresolved for both states.

Clarifying these assignments is important for mapping positive-parity intruder and normal configurations in 34Si and for constraining shell-model descriptions across the sd–fp shells.