New mass value for 7Li.
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.
Nagy
Sz
S
Atomic Physics, AlbaNova, Stockholm University, S-10691 Stockholm, Sweden. Szilard.Nagy@physto.se
Fritioff
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Suhonen
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Schuch
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Blaum
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Björkhage
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Bergström
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