We present a fast and effective wet-chemistry method, used to obtain the pure alpha-emitter 211At/211gPo (T 1/2 = 7.214 h/516 ms), produced by 209Bi(alfa,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.
|Titolo:||Wet-Chemistry Method for the Separation of No-Carrier-Added 211At/211gPo from 209Bi Target Irradiated by Alpha-Beam in Cyclotron|
|Data di pubblicazione:||1-giu-2008|
|Appare nelle tipologie:||1.1 Articolo in rivista|