Theoretical approach to explore the production routes of astatine radionuclides

Abstract

In order to fulfill the recent thrust of Astatine radionuclides in the field of nuclear medicine various production routes have been explored in the present work. The possible production routes of 209−211 At comprise both light and heavy ion induced reactions at the bombarding energy range starting from threshold to maximum 100 MeV energy. For this purpose, we have used the nuclear reaction model codes TALYS, ALICE91 and PACE-II. Excitation functions of those radionuclides, produced through various production routes, have been calculated using nuclear reaction model codes and compared with the available measured data. Contribution of various reaction mechanisms, like, direct, preequilibrium and equilibrium reactions, to the total reaction cross section has been studied using the codes. Result shows that equilibrium reaction mechanism dominates in all cases over other reaction mechanisms.

Production cross section of At radionuclides from7Li+natPb andMaiti1, Lahiri2 2011Phys. Rev. CSelf Cite330130View full textAdd to dashboardCite

“…The present work is limited due to the available projectile energy and reports only a small part of the total excitation functions of the evaporation residues. However, the measured cross section data are important to validate the theoretical predictions reported in [13] and to enrich the nuclear reaction data bank towards the production of various proton rich astatine radionuclides. …”

“…The astatine radionuclides produced in the particular target-projectile combination is tabulated in Table I along with the reaction threshold values. Theoretical investigation [13] shows considerable possibility of producing 211 At (≈ 400 mb) in 7 Li induced reaction on nat Pb. However, it was not possible to identify 211 At by γ-ray spectrometry in the present experimentdue due to its low intensity γ-ray (Fig.…”

“…The details of hybrid model is available in our previous papers [13,22]. The emission of light particles, n, p, d and α, are considered from the residual nuclides of 12 mass unit wide and 10 charge unit deep including the composite nucleus.…”

Across the energy scale: from eV to GeV

“…Any other undesired isotope present, stable or radioactive, in the fraction of desired radionuclide can be treated as impurity. Keeping these in minds, we have theoretically predicted and calculated cross sections of different nuclear reaction involving heavy ion induced production of At radionuclides [45,46]. We have also tried to quantify different types of impurities originating from different nuclear reactions.…”

Production and separation of no-carrier-added 73 As and 75 Se from 7 Li irradiated germanium oxide target

“…1a). The details about the code PACE and its advantage and limitations have been described elsewhere [19,20]. The Fig.…”