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Measurement of half-lives for 87m,gY and 196m,g,194Au produced from the photon and neutron induced reactions of 89Y and 197Au

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Abstract

We have measured the half-lives of 87mY and 87gY produced from the 89Y(γ, 2n) and 89Y(n, 3n) reactions with the bremsstrahlung end-point energy of 65 MeV and the average neutron energy of 37.2 MeV using an activation and an off-line γ-ray spectrometric technique, respectively. The bremsstrahlung photon was produced by using the 100 MeV electron linac of the Pohang Accelerator Laboratory (PAL), whereas the fast neutron was produced from the 9Be(p, n) reaction by using the 45 MeV proton of the MC-50 Cyclotron at the Korea Institute of Radiological and Medical Sciences (KIRAMS). We have also measured the half-lives of 194Au and 196m2,gAu produced from the 197Au(γ, xn; x = 1, 3) and 197Au(n, xn; x = 2, 4) reactions with the bremsstrahlung end-point energy of 60 MeV and the average neutron energy of 37.2 MeV using the same technique and the same facilities as mentioned above. The induced γ-ray activities of the irradiated samples were measured by using an energy- and efficiency calibrated high purity germanium (HPGe) detector. The spectrum analysis has been done by using the ROOT software to separate signals from background. The measured half-lives are compared with the literature values and are in general agreement with each other within the uncertainties.

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Acknowledgements

The authors would like to express their sincere thanks to the staff of the 100 MeV electron linac of PAL, Pohang and MC-50 Cyclotron in the KIRAMS for the excellent operations and their support during the experiment. This research was supported by the National Research Foundation of Korea through a grant provided by the Ministry of Science, ICT and Future Planning (NRF-2017R1D1A1B03030484, NRF-2018M7A1A1072274, and NRF-2018R1A6A1A06024970).

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Authors and Affiliations

  1. Department of Physics, Kyungpook National University, Daegu, 41566, South Korea

    Wooyoung Jang, Muhammad Zaman & Guinyun Kim

  2. Radiochemistry Division, Bhabha Atomic Research Centre, Mumbai, 400085, India

    Haladhara Naik

  3. Daegu Science High School, Daegu, 42110, South Korea

    Jeongyun Choi, Hyunseo Yang, Jeongwoo Lee, Joonhee Oh & Youlki Choi

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  1. Wooyoung Jang
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  2. Muhammad Zaman
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Correspondence to Guinyun Kim.

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Jang, W., Zaman, M., Kim, G. et al. Measurement of half-lives for 87m,gY and 196m,g,194Au produced from the photon and neutron induced reactions of 89Y and 197Au. J Radioanal Nucl Chem 321, 765–773 (2019). https://doi.org/10.1007/s10967-019-06629-z

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  • DOI: https://doi.org/10.1007/s10967-019-06629-z

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