New low-spin states of 122Xe observed via high-statistics β-decay of 122Cs

Excited states of 122 Xe were studied via the β + /EC decay of 122 Cs with the 8 π γ -ray spectrometer at the TRIUMF-ISAC facility. Compton-suppressed HPGe detectors were used for measurements of γ -ray intensities, γγ coincidences, and γ - γ angular correlations. Two sets of data were collected to optimize the decays of the ground (21.2 s) and isomeric (3.7 min) states of 122 Cs. The data collected have enabled the observation of about 505 new transitions and about 250 new levels, including 51 new low-spin states. Spin assignments have been made for 58 low-spin states based on the deduced β -decay feeding and γ-γ angular correlation analyses.