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Isomeric yield ratios in the photoproduction of 52m,gMn from natural iron using 50-, 60-, 70-MeV, and 2.5-GeV bremsstrahlung

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Abstract

The isomeric yield ratios for the natFe(γ,xn1p)52m,gMn reactions have been measured by the activation and the γ-ray spectroscopic methods at 50-, 60-, 70-MeV, and 2.5-GeV bremsstrahlung energies. The high purity natural iron foils in disc shape were irradiated with uncollimated bremsstrahlung beams of the 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. In order to improve the accuracy of the experimental results the necessary corrections were made in the gamma activity measurements and data analysis. The obtained isomeric yield ratios for the natFe(γ,xn1p)52m,gMn reactions at 50-, 60-, 70-MeV, and 2.5-GeV bremsstrahlung energies are 0.27 ± 0.03, 0.33 ± 0.04, 0.34 ± 0.04, and 1.25 ± 0.15, respectively. The present results at 50-, 60-MeV, and 2.5-GeV bremsstrahlung energies are the first measurements. We found that the isomeric yield ratio of the natFe(γ,xn1p)52m,gMn reaction depends on the incident bremsstrahlung energy and the mass difference between the product and the target nucleus when we compared the present results with other experimental data at different energies.

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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 Korea Science and Engineering Foundation (KOSEF) through a grant provided by the Korean Ministry of Education, Science and Technology (MEST) in 2008 (Project No. M2 08B090010810), 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. Institute of Physics and Electronics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi, Vietnam

    Van Do Nguyen, Duc Khue Pham & Tien Thanh Kim

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

    Md. Shakilur Rahman, Kyung-Sook Kim & Guinyun Kim

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

    Hee-Seock Lee, Moo-Hyun Cho, In Soo Ko & Won Namkung

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

    Tae-Ik Ro

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  1. Van Do Nguyen
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Correspondence to Guinyun Kim.

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Nguyen, V.D., Pham, D.K., Kim, T.T. et al. Isomeric yield ratios in the photoproduction of 52m,gMn from natural iron using 50-, 60-, 70-MeV, and 2.5-GeV bremsstrahlung. J Radioanal Nucl Chem 283, 683–690 (2010). https://doi.org/10.1007/s10967-009-0402-2

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