Vd. Ashitkov et al., SEARCH FOR DOUBLE-BETA DECAY OF MO-100 WITH LIQUID ARGON IONIZATION-CHAMBER (FIRST RESULTS), Nuclear physics. B, Proceedings supplement, 70, 1999, pp. 233-235
First two runs with 138.7 g of Mo-100 were done (202 h and 238 h). Lim
its on half-lives for O nu- and O nu chi(0)-decays of Mo-100 were obta
ined, > 2.3 . 10(21) y and 0.8 10(20) y, respectively at 90% CL. Also
the limit on the content of radioactive Ar-42 in the natural Ar was ob
tained, < 5 . 10(-21) g/g. Perspectives for the future are discussed.