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Photo-neutron reaction cross-sections for natZr in the bremsstrahlung end-point energies of 12-16 and 45-70 MeV

  • H. Naik
  • G. N. Kim
  • R. Schwengner
  • K. Kim
  • M. Zaman
  • S. C. Yang
  • M. W. Lee
  • S. G. Shin
  • Y. Gey
  • R. Massarczyk
  • R. John
  • A. Junghans
  • A. Wagner
  • A. Goswami
  • M. -H. Cho
Regular Article - Experimental Physics

Abstract.

The natZr(\(\gamma\), xn) 89-86Zr reaction cross-sections were experimentally determined at the bremsstrahlung end-point energies of 12, 14, 16, 45, 50, 55, 60 and 70MeV by activation and off-line \(\gamma\)-ray spectrometric technique using the 20 MeV electron linac (ELBE) at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany, and the 100 MeV electron linac at the Pohang Accelerator Laboratory (PAL), Pohang, Korea. The natZr(\(\gamma\), xn) 89-86Zr reaction cross-sections as a function of photon energy were also calculated using the TALYS 1.4 computer code. The flux-weighted average cross-sections at the end-point energies of 12-16 and 45-70 MeV were obtained using the literature and the TALYS calculation data based on mono-energetic photons and are found to be in good agreement with the present data. It was also found that the present data and the flux-weighted literature and theoretical values for the natZr(\(\gamma\), xn) 89-86Zr reaction cross-sections increase from the threshold values to a certain energy, where other reaction channels open. This indicates the role of excitation energy. However, the increasing trend of the natZr(\(\gamma\), xn) 89,88Zr reaction cross-sections are sharper from the threshold value up to end-point bremsstrahlung energies of 17-22 MeV compared to the same for the natZr(\(\gamma\), xn) 87, 86Zr reactions. This is due to the Giant Dipole Resonance (GDR) effect besides the role of excitation energy. After a certain value, the individual natZr(\(\gamma\), xn) reaction cross-sections decrease with the increase of bremsstrahlung energy due to opening of other reactions, which indicates partitioning of energy in different channels.

Keywords

Reaction Channel Giant Dipole Resonance 196Au Reaction Pohang Accelerator Laboratory GEANT4 Code 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • H. Naik
    • 1
  • G. N. Kim
    • 2
  • R. Schwengner
    • 3
  • K. Kim
    • 2
  • M. Zaman
    • 2
  • S. C. Yang
    • 2
  • M. W. Lee
    • 2
  • S. G. Shin
    • 4
  • Y. Gey
    • 4
  • R. Massarczyk
    • 3
  • R. John
    • 3
  • A. Junghans
    • 3
  • A. Wagner
    • 3
  • A. Goswami
    • 1
  • M. -H. Cho
    • 4
  1. 1.Radiochemistry DivisionBhabha Atomic Research CentreMumbaiIndia
  2. 2.Department of PhysicsKyungpook National UniversityDaeguRepublic of Korea
  3. 3.Institute of Radiation PhysicsHelmholtz-Zentrum Dresden-RossendorfDresdenGermany
  4. 4.Division of Advanced Nuclear EngineeringPohang University of Science and TechnologyPohangRepublic of Korea

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