title: Determination of the (76)Ge double beta decay Q value.
abstract: The Q value of the (76)Ge double beta decay has been determined by measuring the masses of (76)Ge and (76)Se in a Penning trap using neon- and fluorinelike ions. The obtained masses are 75.921 402 758(96) u and 75.919 213 795(81) u, respectively. The systematic errors of these two determinations are nearly equal, and therefore, the remaining systematic uncertainty of the Q value is drastically reduced. A Q value of 2 039.006(50) keV was obtained improving the accuracy of the accepted value by a factor of 6.
authors.affiliation: Atomic Physics, Stockholm University, Frescativägen 24, S-10405 Stockholm, Sweden.
authors.forename: G
authors.initials: G
authors.lastname: Douysset
authors.forename: T
authors.initials: T
authors.lastname: Fritioff
authors.forename: C
authors.initials: C
authors.lastname: Carlberg
authors.forename: I
authors.initials: I
authors.lastname: Bergström
authors.forename: M
authors.initials: M
authors.lastname: Björkhage