Cross-sections for the 27Al(γ,x)22Na multichannel reaction with the 28.3 MeV difference of reaction thresholds  

作　　者：O.S.Deiev I.S.Timchenko S.N.Olejnik V.A.Kushnir V.V.Mytrochenko S.A.Perezhogin 

机构地区：[1]National Science Center"Kharkov Institute of Physics and Technology",1 Akademichna St.,61108 Kharkiv,Ukraine

出　　处：《Chinese Physics C》2022年第6期129-137,共9页中国物理C（英文版）

摘　　要：The bremsstrahlung flux-averaged cross-sections(σ(Eγmax))and the cross-sections per equivalent photon(σ(Eγmax)Q)were first measured for the photonuclear multichannel reaction ^(27)Al(γ,x)22 Na at end-point bremsstrahlung gamma energies ranging from 35 MeV to 95 MeV.The experiments were performed with the beam from the NSC KIPT electron linear accelerator LUE-40 using theγ-activation technique.The bremsstrahlung quantum flux was calculated with the GEANT4.9.2 program and was also monitored via the ^(100)Mo(γ,n)^(99)Mo reaction.The flux-averaged cross-sections were calculated using the partial cross-sectionσ(E)values computed with the TALYS1.95 code for different level density models.Consideration is given to special features of calculating the cross-sections<σ(Eγmax)>and<σ(Eγmax)Q>for the case of the final nucleus ^(22)Na via several partial channels x:nα+dt+npt+2 n^(3) He+n2d+2 npd+2 p3 n.

关 键 词：bremsstrahlung flux-averaged cross-section bremsstrahlung end-point energy of 35-95 MeV activation and off-lineγ-ray spectrometric technique TALYS1.95 GEANT4.9.2 

分 类 号：TL81[核科学技术—核技术及应用]