We present a fast and effective wet-chemistry method, used to obtain the pure alpha-emitter 211At/211gPo (T1/2 = 7.214 h/516 ms), produced by 209Bi(α,2n) reaction in NCA form. It is a selective radiochemical separation of the At radionuclides from the target and the impurities, characterized by a radionuclidic purity close to 100%, based on the dissolution and the dilution of the irradiated target in acidic medium, on the extraction with DIPE, followed by the back-extraction with NaOH. As a result, we obtain a yield greater than 90–97% in a range from 0.75M to 2.00M.
Wet-chemistry method for the separation of no-carrier-added 211At/211gPo from alpha cyclotron irradiated 209Bi target / C. Zona, M.L. Bonardi, F. Groppi, S. Morzenti, L. Canella, E. Persico, E. Menapace, Z.B. Alfassi, K. Abbas, U. Holzwarth, N. Gibson. - In: JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY. - ISSN 0236-5731. - 276:3(2008 Jun), pp. 819-824.
Wet-chemistry method for the separation of no-carrier-added 211At/211gPo from alpha cyclotron irradiated 209Bi target
C. ZonaPrimo
;M.L. BonardiSecondo
;F. Groppi;S. Morzenti;E. Persico;
2008
Abstract
We present a fast and effective wet-chemistry method, used to obtain the pure alpha-emitter 211At/211gPo (T1/2 = 7.214 h/516 ms), produced by 209Bi(α,2n) reaction in NCA form. It is a selective radiochemical separation of the At radionuclides from the target and the impurities, characterized by a radionuclidic purity close to 100%, based on the dissolution and the dilution of the irradiated target in acidic medium, on the extraction with DIPE, followed by the back-extraction with NaOH. As a result, we obtain a yield greater than 90–97% in a range from 0.75M to 2.00M.
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