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Measurement of isomeric yield ratios for 93Nb(γ,4n)89m,gNb and natMo(γ,xn1p)95m,gNb reactions with 50-, 60-, and 70-MeV bremsstrahlung

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Abstract

We measured the isomeric yield ratios for the photonuclear reactions of 93Nb(γ,4n)89m,gNb and natMo(γ,xnp)95m,gNb by using the activation method. The high-purity 93Nb and natMo metallic foils in disc shape were irradiated with uncollimated bremsstrahlung beams of 50-, 60-, and 70-MeV generated from an electron linear accelerator in Pohang Accelerator Laboratory. The induced activities in the irradiated foils were measured by the high-resolution γ-ray spectrometry with a calibrated high-purity Germanium (HPGe) detector coupled to a PC-based 4 K multichannel analyzer. The reaction 93Nb(γ,4n)89m,gNb was studied for the first time which has no comparable literature data. The result of 95m,gNb isomeric pair was measured based on (γ,p), (γ,np), and (γ,2np) reactions which is the first measurement at the intermediate energy region of 50–70-MeV with a natMo target.

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Acknowledgements

The authors would like to express their sincere thanks to the staffs of Pohang Accelerator Laboratory for excellent operation of the electron linac and their strong support. This work was supported by the National Research Foundation of Korea (NRF) through a Grant provided by the Korean Ministry of Education, Science and Technology (MEST) in 2008 (Project No. KRF-2008-532-C00004) and in 2010 (Project No. 2010-0021375), by the Institutional Activity Program of Korea Atomic Research Institute, and by the Vietnam National Foundation for Science and Technology Development (NAFOSTED).

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Authors and Affiliations

  1. Department of Physics, Kyungpook National University, Daegu, 702-701, Republic of Korea

    Kyung Sook Kim, MD. Shakilur Rahman, Manwoo Lee & Guinyun Kim

  2. Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi, Viet Nam

    Pham Duc Khue & Nguyen Van Do

  3. Pohang Accelerator Laboratory, Pohang University of Science and Technology, Pohang, 790-784, Republic of Korea

    Moo-Hyun Cho, In Soo Ko & Won Namkung

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

    H. Naik

  5. Department of Physics, Dong-A University, Busan, 604-714, Republic of Korea

    Tae-Ik Ro

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  1. Kyung Sook Kim
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  2. MD. Shakilur Rahman
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  3. Manwoo Lee
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  4. Guinyun Kim
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  7. Moo-Hyun Cho
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  11. Tae-Ik Ro
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Correspondence to Guinyun Kim.

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Kim, K.S., Rahman, M.S., Lee, M. et al. Measurement of isomeric yield ratios for 93Nb(γ,4n)89m,gNb and natMo(γ,xn1p)95m,gNb reactions with 50-, 60-, and 70-MeV bremsstrahlung. J Radioanal Nucl Chem 287, 869–877 (2011). https://doi.org/10.1007/s10967-010-0839-3

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