Photonuclear reactions cross-sections at energies up to 100 MeV for different experimental setups

• Main Authors: Deiev, O.S., Timchenko, I.S., Olejnik, S.M., Potin, S.M., Kushnir, V.A., Mytrochenko, V.V., Perezhogin, S.A., Bocharov, V.А., Shramenko, B.I.
• Format: Article
• Language: English
• Published: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2022
• Series: Problems of Atomic Science and Technology
• Subjects: Nuclear physics and elementary particles
• Online Access: http://dspace.nbuv.gov.ua/handle/123456789/195793

In experiments on the electron linac LUE-40 of RDC “Accelerator” NSC KIPT, the flux-averaged cross-sections ⟨σ(Еγmax)⟩exp of photonuclear reactions ¹⁰⁰Mo(γ,n)⁹⁹Mo, ²⁷Al(γ,x)²⁴Na, ⁹³Nb(γ,n)⁹²ᵐNb, ⁹³Nb(γ,3n)⁹⁰Nb, and ¹⁸¹Ta(γ,n)¹⁸⁰ᵍTa were measured using the γ-activation technique. The theoretical flux-average cross-sections ⟨σ(Еγmax)⟩th were computed using the partial cross-section σ(Е) values from the TALYS1.9-1.95 codes and brems-strahlung γ-flux calculated using GEANT4.9.2. Two different experimental setups were used in the experiments: an aluminum electron absorber and a deflecting magnet to clean the bremsstrahlung γ-flux from electrons. A comparison of the flux-average cross-sections measured for two experimental setups was performed. The possibility of using the reactions ¹⁰⁰Mo(γ,n)⁹⁹Mo, ²⁷Al(γ,x)²⁴Na, ⁹³Nb(γ,n)⁹²ᵐNb, ⁹³Nb(γ,3n)⁹⁰Nb, and ¹⁸¹Ta(γ,n)¹⁸⁰ᵍTa as monitors of the bremsstrahlung γ-flux for the energy range 30…100 MeV was investigated.