Photonuclear reactions on titanium isotopes

Abstract

The photodisintegration of titanium isotopes in the giant-dipole-resonance energy region is studied by the photon-activation method. Bremsstrahlung photons whose spectrum has the endpoint energy of 55 MeV is used. The yields and integrated cross sections are determined for photoproton reactions on the titanium isotopes 47,48,49,50 Ti. The respective experimental results are compared with their counterparts calculated on the basis of the TALYS code and a combined photonucleon-reaction model. The TALYS code disregards the isospin structure of the giant dipole resonance and is therefore unable to describe the yield of photoproton reactions on the heavy titanium isotopes 49,50 Ti.

Photonuclear production, chemistry, and in vitro evaluation of the theranostic radionuclide 47Sc

“…In an effort to address the above challenges, recent work has investigated the use of high-intensity electron linear accelerators (eLINACs) with 20–55 MeV electron beams to produce 47 Sc via photonuclear reactions on titanium nuclei [17, 18]. The electrons accelerated by these machines emit bremsstrahlung radiation as they pass through matter, resulting in a spectrum of photon energies ranging from zero to the electron energy with a flux that is inversely proportional to the energy of the radiated photon.…”

“…Rotsch et al (2018) used nat TiO 2 targets to demonstrate a 47 Sc production rate at 35 MeV and 40 MeV of 4.25 MBq/g·kW·h and 6.92 MBq/g·kW·h, respectively, using bremsstrahlung photons [20]. Belyshev et al (2015) showed that the integrated cross section of the nat Ti(γ,p) 47 Sc reaction, using thin titanium foils of natural isotopic composition, was 110 ± 19 mb using a 55 MeV electron beam [18]. T. R. Sherwood and W. E. Turchinetz (1962) measured the cumulative cross section of the nat Ti(γ,p) 47 Sc reaction, yielding a peak cross section of approximately 28 mb at 23 MeV and integrated cross section of 217 ± 32 MeV·mb [21] (Fig.…”