Production and separation of no-carrier-added ^93,94,95Tc from ⁹Be activated yttrium target

Abstract

9 Be induced nuclear reaction / Stacked-foil technique / Proton rich / 93,94,95 Tc / Production yield / Liquid-liquid extraction / Solid-liquid extraction Summary. Proton rich Tc radionuclides have been produced for the first time through 89 Y( 9 Be, xn) 93,94,95 Tc reactions. In order to optimize the yield of a particular radionuclide of choice, batch yield of 93 Tc, 94 Tc and 95 Tc have been measured at different incident energies using stacked-foil technique followed by off-line γ -spectrometry. No-carrier-added (nca) 93,94,95 Tc radionuclides have been separated from bulk yttrium by liquid-liquid extraction (LLX) and solid-liquid extraction (SLX) techniques. Trioctylamine (TOA) diluted in cyclohexane was used as liquid anion exchanger in LLX in presence of HCl. SLX was carried out using cation and anion exchanger resin, DOWEX-50 and DOWEX-1, respectively, in HCl medium.

Production and separation of 97Ru and coproduced 95Tc from 12C-induced reaction on yttrium target

“…More than 90% nca Tc was extracted into TOA leaving nca Ru and bulk Y in aqueous phase. The extraction pattern of the nca Tc corroborates with our earlier paper [28]. However, a nominal difference in the extraction pattern of Y was observed.…”

“…The nca Ru does not show any anionic chemistry under the experimental condition. Separation of nca Tc and bulk Y agreed well with our previous report [28]. The nca Tc was stripped back from the organic phase (0.5 M TOA) by 0.1 M DTPA (diethylenetriaminepentaacetic acid) dissolved in 0.1 M NaOH.…”

“…In Ref. [28], Y remained in the aqueous phase, but a small amount was extracted in the organic phase, while in the present paper Y quantitatively remained in the aqueous phase. The small difference may be due to difference in bulk Y concentration.…”

“…For example, in Ref. [28], the target thickness was 4.9 mg/cm 2 whereas in the present case it is 10 mg/cm 2 . However, the extraction pattern of Y reported in this article also corroborates with our earlier report [29].…”

Across the energy scale: from eV to GeV

“…Following the protocol, for the first time we have investigated heavy ion induced production route of neutron deficient 93,94,95 Tc radionuclides by bombarding 9 Be on natural yttrium target ( 89 Y, 100 % natural abundance). Attempt has been made to develop different radiochemical separation technique for isolation of NCA Tc radionuclides from the bulk target matrix [53,54].…”