The decay of l m has been investigated. The nuclide decays entirely by orbital electron capture with a half-life of 60.0=fc0.5 days. An upper limit of 5X10" 4 was set for the fraction of l m decaying to the 58-day isomer of Te 125 . By proportional counter and coincidence measurements it was established that all transitions go to the 35.4-kev level of Te 125 , which is a dm state. The I 125 ground state can be assigned a J5/2 configuration. The ratio of L\ to K electron capture was determined to be between 0.18 and 0.45, with a most probable value 0.30. From these ratios, the energy difference between the ground states of I 125 and Te 128 was found to be between 95 and 215 kev, with the most probable value 115 kev. The corresponding// values for the transition to the 35.4-kev level of Te 125 fall in the range of allowed transitions.
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