Title: The Smallest Known Q Value of Any Nuclear Decay: the Rare beta-minus Decay of 115In(9/2+) ->115Sn(3/2+)
Authors: WIESLANDER E.SUHONEN J.ERONEN T.HULT MikaelELOMAA V.-V.JOKINEN A.MARISSENS GerdMISIASZEK M.MUSTONEN M.t.RAHAMAN S.WEBER C.AEYSTOE J.
Citation: PHYSICAL REVIEW LETTERS vol. 103 no. 12 p. 122501 (1-4)
Publisher: AMER PHYSICAL SOC
Publication Year: 2009
JRC N°: JRC51296
ISSN: 0031-9007
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC51296
DOI: 10.1103/PhysRevLett.103.122501
Type: Articles in Journals
Abstract: The ground-state-to-ground-state Q-beta-minus value of 115In was determined to 497.68(17) keV using a high precision Penning trap facility at the University of Jyvaskyla, Finland. From this, a Q-beta-minus value of 0.35(17) keV is obtained for the rare beta-minus decay to the first excited state of 115Sn at 497.334(22) keV. The partial half-life was determined to 4.1(6)E20 yr using ultra low-background gamma-ray spectrometry in an underground laboratory. Theoretical modeling of this 2nd-forbidden unique beta-minus transition was also undertaken and resulted in Q-beta-minus = 57(+19-12)eV using the measured half-life. The discrepancy between theory and experiment could be attributed to atomic effects enhanced by the low Q value. The present study implies that this transition has the lowest Q value of any known nuclear beta decay.
JRC Institute:Institute for Reference Materials and Measurements

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.