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Isotopic effect in the decay of antiprotonic helium
Authors:O.I. Kartavtsev  S.I. Fedotov  D.E. Monakhov
Affiliation:(1) Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia
Abstract:An important decay channel of recently discovered metastable antiprotonic helium atoms is the emission of an electron, i.e., the Auger transition. The rate of this process for a number of states of the 3Hebarpe, 4Hebarpe and 6Hebarpe systems is calculated and a substantial isotopic effect is found. While the reduced mass of heavy particles increases slightly with increasing nucleus mass, the Auger transition rate decreases by about a factor of three. The explanation of this strong amplification is given and the role of this effect in experiments is discussed. This revised version was published online in August 2006 with corrections to the Cover Date.
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