title: New mass value for 7Li.
abstract: A high-accuracy mass measurement of 7Li was performed with the SMILETRAP Penning-trap mass spectrometer via a cyclotron frequency comparison of 7Li3+ and H2+. A new atomic-mass value of 7Li has been determined to be 7.016 003 425 6(45) u with a relative uncertainty of 0.63 ppb. It has uncovered a discrepancy as large as 14sigma (1.1 microu) deviation relative to the literature value given in the Atomic-Mass Evaluation AME 2003. The importance of the improved and revised 7Li mass value, for calibration purposes in nuclear-charge radii and atomic-mass measurements of the neutron halos 9Li and 11Li, is discussed.
authors.affiliation: Atomic Physics, AlbaNova, Stockholm University, S-10691 Stockholm, Sweden. Szilard.Nagy@physto.se
authors.forename: Sz
authors.initials: S
authors.lastname: Nagy
authors.forename: T
authors.initials: T
authors.lastname: Fritioff
authors.forename: M
authors.initials: M
authors.lastname: Suhonen
authors.forename: R
authors.initials: R
authors.lastname: Schuch
authors.forename: K
authors.initials: K
authors.lastname: Blaum
authors.forename: M
authors.initials: M
authors.lastname: Björkhage
authors.forename: I
authors.initials: I
authors.lastname: Bergström