Results of a search for double positron decay and electron positron conversion of Kr-78

@inproceedings{Saenz1994ResultsOA,
  title={Results of a search for double positron decay and electron positron conversion of Kr-78},
  author={Carlos Alberto Tello Saenz and Eva Cerezo and E. Garc{\'i}a and Annareli Morales and Jorge Morales and R. N{\'u}{\~n}ez-Lagos and Alfonso Ortiz de Sol{\'o}rzano and Jorge Puimedon and A. Salinas and M. L. Sarsa and Jos{\'e} Villar and A. A. Klimenko and V. Kuzminov and N. I. Metlinsky and Vladimir M. Novikov and Alexey Pomansky and Boris Pritychenko},
  year={1994}
}
The results of a search for the 2[beta][sup +] and [ital K][beta][sup +] decay modes of [sup 78]Kr, in a coincidence experiment using a high pressure ionization chamber of enriched [sup 78]Kr inside an array of sodium iodine scintillators, are presented. After 4434 h of counting time, the half-life lower limits obtained are [ital T][sub 1/2]([ital K][beta][sup +])[sub 0[nu]][ge]5.1[times]10[sup 21] yr and [ital T][sub 1/2](2[beta][sup +])[sub 0[nu]+2[nu]][ge]2.0[times]10[sup 21] yr at 68% C.L.