Mass measurements and superallowed beta decay Academic Article uri icon

abstract

  • A recent Penning-trap measurement of the masses of multiscripts(V, mml:none(), mml:none(), prescripts(), mml:none(), 46) and multiscripts(Ti, mml:none(), mml:none(), prescripts(), mml:none(), 46) leads to a QEC value that disagrees significantly with the previously accepted value, and destroys overall consistency among the nine most precisely characterized T = 1 superallowed emitters. This raises the possibility of a systematic discrepancy between Penning-trap measurements and the reaction-based measurements upon which the QEC values depended in the past. We carefully re-analyze ( n, ) and ( p, ) reaction measurements in the 24 A 28 mass region, and compare the results to very precise Penning-trap measurements of the stable nuclei multiscripts(Mg, mml:none(), mml:none(), prescripts(), mml:none(), 24), multiscripts(Mg, mml:none(), mml:none(), prescripts(), mml:none(), 26) and multiscripts(Si, mml:none(), mml:none(), prescripts(), mml:none(), 28). We thus determine upper limits to possible systematic effects in the reaction results, and go on to establish limits for the mass of radioactive multiscripts(Al, mml:none(), mml:none(), prescripts(), mml:none(), 26), to which future on-line Penning-trap measurements can be compared. We stress the urgency of identifying or ruling out possible systematic effects. 2006 Elsevier B.V. All rights reserved.

published proceedings

  • INTERNATIONAL JOURNAL OF MASS SPECTROMETRY

author list (cited authors)

  • Hardy, J. C., Towner, I. S., & Savard, G.

citation count

  • 11

complete list of authors

  • Hardy, JC||Towner, IS||Savard, G

publication date

  • April 2006