Production cross section of At radionuclides from7Li+natPb and

Abstract

Earlier we reported theoretical studies on the probable production of astatine radionuclides from 6,7 Li and 9 Be-induced reactions on natural lead and thalliun targets, respectively. For the first time, in this report, production of astatine radionuclides has been investigated experimentally with two heavy ion induced reactions: 9 Be+ nat Tl and 7 Li+ nat Pb. Formation cross sections of the evaporation residues, 207,208,209,210 At, produced in (HI, xn) channel, have been measured by the stacked-foil technique followed by the off-line γ-spectrometry at the low incident energies (<50 MeV). Measured excitation functions have been explained in terms of compound nuclear reaction mechanism using Weisskopf-Ewing and Hauser-Feshbach model. Absolute cross section values are lower than the respective theoretical predictions.

Li7 -induced reaction on Monat : A study of complete versus incomplete fusion

“…Nuclear spectroscopic data of the residual radionuclides are listed in Table I [48]. Details of the activity calculation, cross-section estimation and corresponding uncertainties are described in our previous reports [49][50][51]. Contribution of CF and ICF from the measured cross section data has been accomplished with the help of theoretical model codes: EMPIRE3.2 [54] and PACE4 [55].…”

Comparison on the production of radionuclides in 1.4 GeV proton irradiated LBE targets of different thickness

“…However, Maiti [32] decisively showed in her recent paper that no low energy nuclear reaction, i.e. reaction using light or heavy ion projectiles are suitable for production of terbium radionuclides in large quantity required for clinical purpose [32,33]. We found several terbium radionuclides (e.g., 151,153,154 Tb, listed on Table 2), therefore it is expected that a-emitting 149 Tb will also be produced in large quantities in proton irradiated LBE targets, which we could not observe because the radionuclide has no suitable c-energies.…”

“…Recently terbium radionuclides, especially 149 Tb (T 1/2 = 4.11 h) is under focus as an excellent radionuclide for targeted therapy. However, Maiti [32] decisively showed in her recent paper that no low energy nuclear reaction, i.e. reaction using light or heavy ion projectiles are suitable for production of terbium radionuclides in large quantity required for clinical purpose [32,33].…”

Across the energy scale: from eV to GeV

“…nat Pb in 40-48 MeV projectile energy range and 9 Be ? nat Tl reactions in 40-50 MeV range [49]. Natural non-hygroscopic thallium carbonate and lead nitrate of thickness 1.8 and 3.0 mg/cm 2 respectively were used as target materials.…”