Gallex Data Can't Quite Lay the Solar Neutrino Problem to Rest

16 July issue of Physics Letters brings us the eagerly awaited report of the first results from the Gallex solar neutrino experiment. The Gallex detector, with its 30 tons of gallium, sits in a laboratory underneath the Gran Sasso d'ltalia, a 2900‐meter peak in the Apennines northeast of Rome. The suspense was heightened last fall when the SAGE collaboration, which operates the only other gallium detector, reported that it had seen no clear evidence of any solar neutrinos in its first seven months of running. The name Soviet‐American Gallium Experiment may now seem out of date, but the experiment, located under a mountain in the Caucasus, goes on. SAGE is now operating with 57 tons of gallium.