Coherent photonuclear reactions for isotope transmutation

轫致辐射终点能量10–23 MeV下硒稳定同位素的光核反应

Photonuclear reactions on the stable isotopes of selenium at bremsstrahlung end-point energies of 10-23 MeV

研究在10–23 MeV轫致辐射下测量硒稳定同位素的光核反应相对产额，并通过TALYS与含同位旋劈裂的光核子反应组合模型改进对质子逸出及GDR衰变的描述。

Cross-sections of photonuclear reactions on $^{nat}$Mo targets at end-point bremsstrahlung energy up to $E_{γmax}$ = 100 MeV

Experiments to determine the yields and bremsstrahlung flux-averaged cross-sections <$σ(E_{γmax})$> of photonuclear reactions on the natural Mo targets were performed on the beam from the NSC KIPT electron linear accelerator LUE-40 with the use of the $γ$-activation technique. The bremsstrahlung end-point energies were in the range $E_{γmax}$ = 35...80 MeV. The bremsstrahlung quantum flux was calculated with the program GEANT4.9.2 and, in addition, was monitored using the $^{100}$Mo$(γ,n)^{99}$Mo reaction. Calculations of the yields and average cross-sections <$σ(E_{γmax})$> for photonuclear r…

等离子体系统中同位素的生产

Isotope Production in Fusion Systems

本文探讨了通过中子驱动嬗变在聚变系统中生产同位素的经济可行性，提出通过选择性饲料材料生成电力和高价值同位素，提升聚变能的经济价值，并提出新的净现值经济平衡条件。

Photonuclear reactions with Zinc: A case for clinical linacs

The use of bremsstrahlung photons produced by a linac to induce photonuclear reactions is wide spread. However, using a clinical linac to produce the photons is a new concept. We aimed to induce photonuclear reactions on zinc isotopes and measure the subsequent transition energies and half-lives. For this purpose, a bremsstrahlung photon beam of 18 MeV endpoint energy produced by the Philips SLI-25 linac has been used. The subsequent decay has been measured with a well-shielded single HPGe detector. The results obtained for transition energies are in good agreement with the literature data and…

在大型强子对撞机中转化$^{16}$O和$^{20}$Ne

Transmutation of $^{16}$O and $^{20}$Ne at the Large Hadron Collider

研究在LHC中通过碰撞$^{16}$O和$^{20}$Ne同位素来探索超相对论轻离子碰撞的物理，利用Trajectum和GEMINI代码估计生产截面及可能的测量结果。

Production of Medical Radioisotopes with High Specific Activity in Photonuclear Reactions with $γ$ Beams of High Intensity and Large Brilliance

We study the production of radioisotopes for nuclear medicine in $(γ,x{\rm n}+y{\rm p})$ photonuclear reactions or ($γ,γ'$) photoexcitation reactions with high flux [($10^{13}-10^{15}$)$γ$/s], small diameter $\sim (100 \, μ$m$)^2$ and small band width ($ΔE/E \approx 10^{-3}-10^{-4}$) $γ$ beams produced by Compton back-scattering of laser light from relativistic brilliant electron beams. We compare them to (ion,$x$n$ + y$p) reactions with (ion=p,d,$α$) from particle accelerators like cyclotrons and (n,$γ$) or (n,f) reactions from nuclear reactors. For photonuclear reactions with a narrow $γ$ be…

197Au(γ,pn)195mPt反应的光核截面：阈值附近

Photonuclear Cross Sections for the $^{197}$Au($γ$,pn)$^{195m}$Pt Reaction Near Threshold

研究197Au(γ,pn)195mPt反应在阈值附近的光核截面，通过活化法测量不同γ射线能量下的截面数据，与PHITS和TALYS计算对比，发现反应在约30MeV附近可测量，需更高轫制辐射终点能量实现实际生产。

利用高能融合中子生产高比活度的放射性同位素

Production of High-Specific-Activity Radioisotopes Using High-Energy Fusion Neutrons

利用高能融合中子嬗变生产多种高比活度的医疗放射性同位素，提供高纯度且抗扩散的供应平台。

Experimental study of the electric dipole strength in the even Mo nuclei and its deformation dependence

Two methods based on bremsstrahlung were applied to the stable even Mo isotopes for the experimental determination of the photon strength function covering the high excitation energy range above 4 MeV with its increasing level density. Photon scattering was used up to the neutron separation energies Sn and data up to the maximum of the isovector giant resonance(GDR) were obtained by photo-activation. After a proper correction for multi-step processes the observed quasi-continuous spectra of scattered photons show a remarkably good match to the photon strengths derived from nuclear photo effect…

Reference Database for Photon Strength Functions

Photon strength functions describing the average response of the nucleus to an electromagnetic probe are key input information in the theoretical modelling of nuclear reactions. Consequently they are important for a wide range of fields such as nuclear structure, nuclear astrophysics, medical isotope production, fission and fusion reactor technologies. They are also sources of information for widely used reaction libraries such as the IAEA Reference Input Parameter Library and evaluated data files such as EGAF. In the past two decades, the amount of reaction gamma-ray data measured to determin…