Search for Oscillation of the Electron-Capture Decay Probability of $^{142}$Pm

Simple item page
dc.creatorVetter, P. A.
dc.creatorClark, R. M.
dc.creatorDvorak, J.
dc.creatorFreedman, S. J.
dc.creatorGregorich, K. E.
dc.creatorJeppesen, H. B.
dc.creatorMittelberger, D.
dc.creatorWiedeking, M.
dc.date2008-07-03
dc.date.accessioned2026-07-07T12:14:54Z
dc.date.available2026-07-07T12:14:54Z
dc.descriptionWe have searched for time modulation of the electron capture decay probability of $^{142}$Pm in an attempt to confirm a recent claim from a group at the Gesellschaft für Schwerionenforschung (GSI). We produced $^{142}$Pm via the $^{124}$Sn($^{23}$Na, 5n)$^{142}$Pm reaction at the Berkeley 88-Inch Cyclotron with a bombardment time short compared to the reported modulation period. Isotope selection by the Berkeley Gas-filled Separator is followed by implantation and a long period of monitoring the $^{142}$Nd K$_α$ x-rays from the daughter. The decay time spectrum of the x-rays is well-described by a simple exponential and the measured half-life of 40.68(53) seconds is consistent with the accepted value. We observed no oscillatory modulation at the proposed frequency at a level 31 times smaller than that reported by Litvinov {\it et al.} (Phys. Lett. B 664 (2008) 162; arXiv:0801.2079 [nucl-ex]). A literature search for previous experiments that might have been sensitive to the reported modulation uncovered another example in $^{142}$Eu electron-capture decay. A reanalysis of the published data shows no oscillatory behavior.
dc.description12 pages (double-spaced), 6 figures
dc.identifierhttps://arxiv.org/abs/0807.0649
dc.identifierhttp://arxiv.org/abs/0807.0649
dc.identifierPhys.Lett.B670:196-199,2008
dc.identifierdoi:10.1016/j.physletb.2008.11.004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211352
dc.subjectNuclear Experiment
dc.titleSearch for Oscillation of the Electron-Capture Decay Probability of $^{142}$Pm
dc.typetext

Files

Collections

arXiv