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Integral cross section of the99Tc(γ,γ′)99mTc reaction at 4 MeV

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Abstract

99mTc production was studied with the aid of photoexcitation by a 4 MeV endpoint energy bremsstrahlung from the LINAC of the Institute of Isotopes, Budapest. The intensity of the γ-flux was monitored by disc-shaped natural indium plates, placed in front of and behind the small cylindrical aluminium holders containing TcO2 samples in a powder form. Isomeric activities were measured through the 140 keV γ-line by a Ge spectrometer. The integral cross section at 4 MeV was found to be 63.3±7.1 μbMeV, which can be considered reasonable compared to the corresponding value of 55.3 μbMeV established for the115In (γ,γ′)115mIn reaction. We also attempted the photoexcitation of99mTc by irradiation with γ-rays from a 1.5×1015 Bq60Co source, but no isomeric activity could be observed. This places the first activation level between 1.33 and 4 MeV.

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Authors and Affiliations

  1. Institute of Isotopes of, the Hungarian Academy of Sciences, P.O.Box 77, H-1525, Budapest, Hungary

    J. Sáfár, L. Lakosi, I. Pavlicsek & A. Veres

  2. Department of Chemistry, Faculty of Science, Tohoku University, Aoba-ku, 980, Sendai, Japan

    T. Sekine & K. Yoshihara

Authors
  1. J. Sáfár
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  2. L. Lakosi
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  3. I. Pavlicsek
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  4. A. Veres
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  5. T. Sekine
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  6. K. Yoshihara
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Sáfár, J., Lakosi, L., Pavlicsek, I. et al. Integral cross section of the99Tc(γ,γ′)99mTc reaction at 4 MeV. Journal of Radioanalytical and Nuclear Chemistry Letters 176, 285–293 (1993). https://doi.org/10.1007/BF02163493

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  • DOI: https://doi.org/10.1007/BF02163493

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