Nuclear Science and Techniques ›› 2005, Vol. 16 ›› Issue (6):
M. AHMAD, W. AHMAD, M. U. RAJPUT, A. QAYYUM
The thermal neutron capture gamma ray facility at Pakistan Research Reactor (PARR-1) is being used for
the re-estimation of various properties like capture cross-sections, resonance integral, absolute gamma intensities, etc.
of different isotopes. The data for gamma ray transitions from the capture of thermal neutrons by 55Mn are not in
good agreement specifically below 2 MeV. So there is a need to re-estimate its intensities with better accuracy. Analytical
grade MnCl2 powder and high purity Mn metal pieces were used in this study. Standard 152Eu and 60Co radioactive
sources as well as thermal neutron capture γ-rays in chlorine were chosen for efficiency calibration. The k0 standardization technique was applied for these measurements to eliminate systematic errors in efficiencies. Chlorine
also acted as a comparator in k0- factor calculations. The results have been tabulated for the main gamma rays from 56Mn in the low as well as in the medium energy regions. The absolute intensities are in good agreement with most of
the reported values.
Prompt gamma rays,
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