New measurement of thick target yield for narrow resonance at E x = 9.17 MeV in the ¹³C( p , γ )¹⁴N reaction*

Abstract

High energy γ-rays can be used in many fields, such as nuclear waste transmutation, flash photographics, and astrophysics. The 13C( p , γ )14N resonance reaction was used to generate high energy and mono-energetic γ-rays in this work. The thick-target yield of the 9.17-MeV γ-ray from the resonance in this reaction was determined to be (4.7±0.4) × 10 − 9 γ /proton, which was measured by a HPGe detector. Meanwhile, the angular distribution of 9.17-MeV γ-ray was also determined. The absolute efficiency of HPGe detector was calibrated using 56Co and 152Eu sources with known radioactive activities and calculated by GEANT4 simulation.

Study on γ-ray source from the resonant reaction 19F(p,αγ) 16O at E p = 340 keV*

“…In order to get the yield of full space, the LaBr 3 detectors were used to detect the γ-ray angular distribution from 0 • to 165 • . We used six LaBr 3 detectors placed at 50-cm distance from the target position at 0 • , 30 In 19 F( p, αγ) 16 O resonance reaction, the energy of γ-ray we concerned is 6.13 MeV, so we should calibrate the efficiency of HPGe and LaBr 3 detectors at this energy. However, the maximum energy of γ-ray from γ-ray sources is only about 3.5 MeV.…”

“…The energy range just fits in the GDR region. In this work, the 6.13-MeV γ-ray can be generated from the 19 F ( p, αγ) 16 O reaction. Also, the 19 F ( p, αγ) 16 O reaction plays a crucial role for the net CNO mass fraction in nuclear astrophysics.…”

“…In this work, the 6.13-MeV γ-ray can be generated from the 19 F ( p, αγ) 16 O reaction. Also, the 19 F ( p, αγ) 16 O reaction plays a crucial role for the net CNO mass fraction in nuclear astrophysics. [13] In addition, particle-induced γ-ray emission (PIGE) is a common technique used to detect and analyze elements lighter than calcium.…”

“…According to the Breit-Wingner formula, the cross section and the width of the resonance are the key parameters of the resonance reaction. [18,19] The measurement for the resonance parameters of the 19 F( p, αγ) 16 O reaction at E p = 340 keV have been studied by several investigators. They have measured the resonant energy, maximum cross section, and the width of the total reaction, etc.…”

“…Then the angular distribution of 6.13-MeV γ ray's yield had been measured, and the thick-target yield of 6.13-MeV γ-ray has been calculated. The flux of γ source from the resonant reaction 19 F ( p, αγ) 16 O at E p = 340 keV was determined finally. The new reference values of the total width of resonance and the maximum cross section were gained.…”