Chemical separations for super-heavy element searches in irradiated uranium targets

Extraction chromatographic behavior of actinium and REE on DGA, Ln and TRU resins in nitric acid solutions

“…Effective sorption of Ac(III) on Ln Resin occurs from dilute nitric acid (0.05 M HNO 3 ) and elution could be done using C0.1 M HNO 3 [14]. Various nitric acid concentrations, i.e.…”

“…Therefore, the development of the fast and up-scalable techniques for isolation of radiochemically and chemically pure 225 Ac applicable under hot-cell conditions is required. The extraction chromatography is a prospective method for separation of various radionuclides including actinides and lanthanides [14]. It was demonstrated that extraction chromatographic resins based on N,N,N 0 ,N 0 tetroctyldiglicolamide (DGA Resin, TrisKem Int.…”

Production of no-carrier-added 135La at an 18 MeV cyclotron and its purification for investigations at a concentration range down to 10−15 mol/L

“…The spectrum of this fraction is given in Figure 3a. La is eluted specifically with 6 M HNO 3 in the first three fractions (11)(12)(13) as expected from an extrapolated d -value below 0.01 [19]. The -ray spectrum of the main La fraction is given in Figure 3b.…”

“…Here we describe in detail the chemical separation performed by a La-selective resin. This resin was used in previous studies to separate lanthanides from environmental samples or fission products [19][20][21][22]. We applied this resin the first time for the purification of 135 La from an irradiated Ba target.…”

Californium purification and electrodeposition

“…The LN resin is an extraction chromatographic resin with the chemical functionality of di-(2-ethylhexyl)phosphoric acid (HDEHP) on a hydrophobic support. HDEHP is known to complex Ln and An in both solvent extraction [13,14] and extraction chromatography [15,16]. The separation of Ln and An can be controlled by adjusting the acidity to control the complexation of each specific ion, where larger ions are more strongly bound by the DEHPanion.…”