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@ARTICLE{Hussain:1046743,
      author       = {Hussain, Mazhar and Koers, Lucas Mues genannt and Spahn,
                      Ingo and Spellerberg, Stefan and Neumaier, Bernd and Qaim,
                      Syed M.},
      title        = {{P}ositron emission intensity in the decay of 72{A}s for
                      use in {PET} studies},
      journal      = {Radiochimica acta},
      volume       = {113},
      number       = {8},
      issn         = {0033-8230},
      address      = {Berlin},
      publisher    = {De Gruyter},
      reportid     = {FZJ-2025-03942},
      pages        = {601 - 609},
      year         = {2025},
      note         = {This work was supported by the Alexander von Humboldt (AvH)
                      Foundation of the Federal Republic of Germany. The author M.
                      Hussain is very grateful to AvH for the research fellowship
                      and funding under its Georg Forster program for senior
                      researchers.},
      abstract     = {72As is a β+-emitter (T1/2 = 26.0 h; Eβ+ = 1.17 MeV,Iβ+
                      = 87.8 $\%)$ that can be produced at a cyclotron and has
                      significant potential for use in PET studies. Experiments
                      have been undertaken to determine its positron emission
                      intensity with greater precision. Thin enriched 72Ge targets
                      were irradiated with protons of energies around 9 MeV at the
                      cyclotron BC1710 of the Forschungszentrum Jülich. Three
                      different counting methods were used: high-resolution γ-ray
                      spectroscopy, beta counting and X-ray spectroscopy. The
                      major γ-ray peaks of 72As formed via the 72Ge(p,n)72As
                      reaction were analysed to calculate its absolute
                      radioactivity, while the annihilation radiation was
                      characterized by a careful analysis of the 511 keV peak.
                      Beta counting of the same samples was undertaken over a long
                      period of time to validate the results. X-ray counting was
                      also carried out to obtain the integral decay of 72As via
                      electron capture (EC).The measurements furnished a total
                      positron decay (87.3 ± 3.7 $\%)$ and total EC decay (12.7
                      ± 0.6 $\%).$ These experimental values agree with those
                      deduced from a detailed evaluation of the decay scheme of
                      72As.},
      cin          = {INM-5},
      ddc          = {610},
      cid          = {I:(DE-Juel1)INM-5-20090406},
      pnm          = {5253 - Neuroimaging (POF4-525)},
      pid          = {G:(DE-HGF)POF4-5253},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1515/ract-2025-0005},
      url          = {https://juser.fz-juelich.de/record/1046743},
}