Susanta Lahiri

LLX separation of carrier-free,94,95,97,103Ru,93,94,95,96,99mTc and95,96Nb produced in alpha-particle activated molybdenum by TOA

A radiochemical charged particle activation procedure for the simultaneous production of carrier-free radioisotopes of more than one element in a single target and their subsequent separation through LLX has been demonstrated. The carrier free isotopes,95,96Nb,93,94,95,96,99mTc and94,95,97,103Ru formed through Mo(α,αpxn), Mo(α,pxn) and Mo(α,xn) nuclear reactions with 40 MeV α-particle as detected by nondestructive γ-ray spectroscopy, have been effectively separated through LLX using TOA as an anionic extractant. Separation of the bulk matrix of molybdenum from the carrier free products has been monitored radiometrically using isotopic93,99mMo formed through the Mo(α,αxn) reaction, as radioindicators for the target element. Purity of the separated carrier free radionuclide has been verified by γ-ray spectrometry.

Simultaneous production of 89Zr and 90,91m,92mNb in α-particle activated yttrium and their subsequent separation by HDEHP

Simultaneous production of carrier free89Zr and90,91m,92mNb through the (α, pxn) and (α,xn) nuclear reactions has been performed by α-particle activation of Y2O3 target. The sequential separation of the produced radioisotopes from the bulk target matrix has been achieved through LLX using TOA as a liquid anion exchanger. Formation of the carrier free radionuclides in the target matrix and their purity in different stages of separation have been verified by γ-ray spectrometry.

LLX separation of carrier-free 47Sc, 48V and 48,49,51Cr produced in α-particle activated titanium with HDEHP

Abstract A LLX procedure for carrier-free separation of the radioisotopes, 47Sc, 48V and 48,49,51Cr, the 40 MeV α-particle activation products of titanium has been developed. Sequential separations of the radionuclides produced in the titanium matrix through the nuclear reactions (α, α pxn), (α, pxn) and (α, xn) have been performed through LLX from aqueous H2SO4 and HClO4 acid media using the liquid cation exchanger, HDEHP, as an extractant. Purity of the carrier-free radiotracers at different stages of their separations has been verified by γ-ray spectrometry.

Liquid-liquid extraction of carrier-free radioisotopes produced in α-particle activated molybdenum target by HDEHP and TBP

Abstract Simultaneous production of carrier free isotopes like 95,96 Nb, 93,94,95,96,99m Tc and 94,95,97,103 Ru through the nuclear reactions (α, αpxn), (α, pxn) and (α, xn) has been performed by α-particle activation of a molybdenum target. The sequential separation of the produced radioisotopes from the bulk target matrix has been achieved through LLX using HDEHP and TBP as liquid exchangers. Formation of the carrier free radionuclides in the target matrix and their purity in different stages of separation have been verified by taking recourse to γ-ray spectrometry.

Simultaneous production of carrier-free 65Zn and 66,67,68Ga in α-particle activated copper target and their separation with TOA

Abstract Simultaneous production of carrier-free radioisotopes, 65Zn and 66,67,68Ga, has been achieved by activation of a thick copper target with a 50 MeV α-particle. A liquid-liquid extraction procedure for the effective separation of radionuclides 65Zn and 66,67,68Ga formed, respectively, through the nuclear reactions, (α, pxn) and (α, xn), from the target element has been developed in an aqueous hydrochloric acid medium using a liquid anion exchanger, trioctylamine (TOA), as an extractant. The extent of the separation and purity of the carrier-free radiotracers at different stages of their LLX separation has been verified by taking recourse to γ-ray spectrometry.

Sequential separation of carrier free radioisotopes of rhodium, silver and cadmium produced in α-particle activated palladium by TOA

Abstract Carrier free radioisotopes of rhodium, silver and cadmium, 101,105,106mRh, 103,104,105,106,110m,112Ag and 104,105,107,109,111mCd, respectively, were produced simultaneously by α-particle activation of metallic palladium. The radioisotopes produced were separated by LLX using TOA as a liquid anion exchanger. The presence of the various radionuclides in the activated target matrix and their purity at various stages of separation were verified by taking recourse to γ-ray spectrometry.

Sequential separation by HDEHP of carrier-free101,105,106Rh,103,104,105,106,110,112Ag and104,105,107,109,111Cd produced in alpha-particle activated palladium

Carrier free101,105,106Rh,103,104,105,106,110,112Ag and104,105,107,109,111Cd radioisotopes were produced simultaneously by α-particle irradiation of palladium target material in a variable energy cyclotron. The radioisotopes produced were extracted and separated from the activated target by LLX using HDEHP as liquid cation exchanger. With the help of γ-ray spectrometry the presence of several radioisotopes in the activated target matrix and their purity at each step of the separation was confirmed.

Simultaneous production of89Zr and90,91m92mNb in α-particle activated yttrium and their subsequent separation by TOA

Simultaneous production of carrier free89Zr and90,91m,92mNb through the (α, pxn) and (α,xn) nuclear reactions has been performed by α-particle activation of Y2O3 target. The sequential separation of the produced radioisotopes from the bulk target matrix has been achieved through LLX using TOA as a liquid anion exchanger. Formation of the carrier free radionuclides in the target matrix and their purity in different stages of separation have been verified by γ-ray spectrometry.

Sequential separation of carrier free 52,56Mn, 55,56,58Co and 56,57Ni from α-particle activated iron with triisooctylamine

Abstract A radiochemical charged particle activation procedure for production and separation of carrier free 52,56 Mn, 55,56,58 Co and 56,57 Ni has been developed. The radioisotopes produced on bombardment of an iron foil target with a 40 MeV α-particle beam through the nuclear reactions, Fe( α , α p x n) 52,56 Mn, Fe( α , p x n) 55,56,58 Co and Fe( α , x n) 56,57 Ni, have been sequentially separated by HCl medium target element and the activation products have been sequentially separated from an HCl medium using diethylether and the liquid anion exchanger, TIOA, as extractants. Extent of separation and purity of the carrier free radiotracers at different stages of their LLX separation have been verified by taking recourse to γ-ray spectrometry.

Separation of no-carrier-added As and Se produced in 16O irradiated cobalt target

No-carrier-added radionuclides of arsenic and selenium were produced in 16O irradiated cobalt target matrix. The initial products, formed by 59Co(16O,xn)70-73Br reaction, decayed promptly to arsenic and selenium radionuclides, which were subsequently separated by liquid-liquid extraction (LLX) using di-(2-ethylhexyl) phosphoric acid (HDEHP) and trioctylamine (TOA) as liquid ion exchangers.