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@ARTICLE{Basunia:886126,
      author       = {Basunia, M. S. and Morrell, J. T. and Uddin, M. S. and
                      Voyles, A. S. and Nesaraja, C. D. and Bernstein, L. A. and
                      Browne, E. and Martin, M. J. and Qaim, S. M.},
      title        = {{R}esolution of a discrepancy in the γ -ray emission
                      probability from the β decay of {C}e g 137},
      journal      = {Physical review / C},
      volume       = {101},
      number       = {6},
      issn         = {2469-9985},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2020-04289},
      pages        = {064619},
      year         = {2020},
      abstract     = {We have deduced the emission probability of the 447-keV γ
                      ray from the ɛ+β+ decay of 137Ceg (9.0 h) relative to that
                      of the 254-keV γ ray from the 137Cem (34.4 h) decay in
                      transient equilibrium. The time-dependent factor in
                      transient equilibrium was applied following the Bateman
                      equation for a radioactive decay chain. The isotope was
                      produced via the 139La(p,3n)137Cem,g reaction by bombarding
                      natLa with a proton beam from the 88-in. cyclotron at
                      Lawrence Berkeley National Laboratory. γ-ray intensities
                      were measured using an HPGe detector. The emission
                      probability for the 447-keV γ ray deduced in this work is
                      1.21(3) (that is 1.21 ± 0.03) per hundred parent decays,
                      which differs significantly from an earlier published value
                      of 2.24(10). We identify the source of this discrepancy to
                      be an incorrect use of the time-dependent factor.
                      Additionally, we have deduced the emission probability of
                      the 504-keV γ ray from the decay of 85Yg (2.68 h) relative
                      to that of the 232-keV γ ray from the 85Srm (1.127 h) decay
                      in transient equilibrium. The isotope was produced via the
                      86Sr(p,2n)85Yg reaction by bombarding 86SrCO3 with a proton
                      beam at the same facility. The study confirms the assumption
                      of the time-dependent correction for recommending the
                      emission probability of the 504-keV γ ray in the
                      literature. Our work highlights the importance of explicit
                      description by authors of any time-dependent correction they
                      have made when reporting γ-ray intensities for nuclides in
                      transient equilibrium. The need and significance of accurate
                      and precise decay data of 137Ceg and 85Yg in basic science
                      and medicine is briefly outlined.},
      cin          = {INM-5},
      ddc          = {530},
      cid          = {I:(DE-Juel1)INM-5-20090406},
      pnm          = {573 - Neuroimaging (POF3-573)},
      pid          = {G:(DE-HGF)POF3-573},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000541414000001},
      doi          = {10.1103/PhysRevC.101.064619},
      url          = {https://juser.fz-juelich.de/record/886126},
}