Vol. 24 No. 3S2 (2014)
Papers

Measurement of Thermal Neutron Capture Cross Section and Resonance Integral for the \(^{45}\)Sc\((n,\gamma)^{46}\)Sc Reaction with Pulsed Neutrons

Nguyen Van Do
Institute of Physics, VAST
Pham Duc Khue
Institute of Physics, VAST
Kim Tien Thanh
Institute of Physics, VAST
Nguyen Thi Hien
Institute of Physics, VAST
Kim Guinyun
Department of Physics, Kyungpook National University, Daegu 702-701, Republic of Korea

Published 06-10-2014

Keywords

  • thernal neutron cross-section,
  • resonance integral,
  • $^{45}$Sc(n,
  • $\gamma )^{46}$Sc reaction,
  • gold monitor,
  • electron linac,
  • Cd-ratio method
  • ...More
    Less

How to Cite

Do, N. V., Khue, P. D., Thanh, K. T., Hien, N. T., & Guinyun, K. (2014). Measurement of Thermal Neutron Capture Cross Section and Resonance Integral for the \(^{45}\)Sc\((n,\gamma)^{46}\)Sc Reaction with Pulsed Neutrons. Communications in Physics, 24(3S2), 29–37. https://doi.org/10.15625/0868-3166/24/3S2/5049

Abstract

Thermal neutron capture cross section and resonance integral for the $^{45}$Sc(n,$\gamma )^{46}$Sc reaction were measured by the activation method using the $^{197}$Au(n,$\gamma )^{198}$Au reaction as a single comparator. The high-purity scandium and gold samples with and without Cd cover with the thickness of 0.5 mm were irradiated in a pulsed neutron field of the 100 MeV electron linac of the Pohang Accelerator Laboratory (PAL). The induced activities in the activated foils were measured with a well calibrated HPGe detector. In order to improve the accuracy of the experimental results the effect of the non-ideal epithermal spectrum was taken in to account by determining the neutron spectrum shape factor ($\alpha )$, and the corrections for the thermal (G$_{th})$ and the resonance (G$_{epi})$ neutron self-shielding effects, the $\gamma $-ray attenuation (F$_{g})$ and the $\gamma $-ray coincidence summing effect were made. The thermal neutron cross-section for the $^{45}$Sc(n,$\gamma )^{46}$Sc reaction has been determined to be $\sigma _{o}$ = 27.6 $\pm $ 0.8 barn. By assuming the cadmium cut-off energy of 0.55 eV, the resonance integral for the $^{45}$Sc(n,$\gamma )^{46}$Sc reaction has been determined to be I$_{o}$ = 12.7 $\pm $ 0.7 bar. The present results are compared with the reference data and discussed.

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