Favorable experimental conditions for differential cross-section measurement of PIGE reactions using the van de graaff accelerator of tehran

Abstract

The present research aims to measure the physical parameters affecting the differential cross-sections of PIGE reactions in the 45˚R beamline of the Van de Graaff accelerator. The calibration coefficient, the correlation between particle energy and NMR frequency, was determined using the relevant nuclear reactions. The absolute efficiency of the HPGe detector within the energy range of 60 to 10800 keV was obtained using the gamma rays of the standard radioactive sources and the cascade gamma rays due to the proton capture reactions. Two different techniques determined the solid angle of the charged particle detector. Using the backscattered particles' spectra, the beam current and the number of target nuclei were calculated. Also, the necessity for reducing the laboratory background and identifying the undesired peaks due to neutron-induced reactions was discussed. Under favorable experimental conditions, the systematic uncertainty for cross-section measurement was estimated to be less than 9%.

Keywords

• van de graaff accelerator
• particle induced gamma-ray emission
• differential cross section