PT Journal
AU Goigoux, Tea
   Algora, A
   Guadilla, V
   Montaner-Piza, A
   Morales, AI
   Orrigo, SEA
   Rubio, B
   Gelletly, W
TI Two-Proton Radioactivity of Kr-67
SO Physical Review Letters
JI Phys. Rev. Lett.
PY 2016
BP 162501
EP 6pp
VL 117
IS 16
DI 10.1103/PhysRevLett.117.162501
LA English
AB In an experiment with the BigRIPS separator at the RIKEN Nishina Center, we observed two-proton (2p) emission from Kr-67. At the same time, no evidence for 2p emission of Ge-59 and Se-63, two other potential candidates for this exotic radioactivity, could be observed. This observation is in line with Q value predictions which pointed to Kr-67 as being the best new candidate among the three for two-proton radioactivity. Kr-67 is only the fourth 2p ground-state emitter to be observed with a half-life of the order of a few milliseconds. The decay energy was determined to be 1690(17) keV, the 2p emission branching ratio is 37(14)%, and the half-life of Kr-67 is 7.4(30) ms.
ER