Simulation of alpha decay of actinides in iron phosphate glasses by ion irradiation

Correlation between glass transition effect and structural changes in multicomponent iron phosphate-silicate glasses

“…It is consistent with results obtained from analysis of Raman spectrum of 15Fe41P [19]. The second one may be a corollary of (PO 4 ) 3asymmetric stretching in orthophosphate units [21,28,29]. Although the assignment of the band observed in spectrum of 2Fe41P is not definite, the tendency to the network depolymerization is once again revealed.…”

“…The Correlation between glass transition effect and structural changes in multicomponent iron… 4147 conspicuous upshift observed in the 850-950 cm -1 region is presumably associated with decreasing length of the P-O-P chain [29]. Therefore, due to position at 927 cm -1 , the structure of 30Fe41P is characterized by shorter chains and increased number of pyrophosphate units [26,28,33]. Simultaneously in 2Fe41P glass, the band at 911 cm -1 indicate that increased number of P-O-P linkages compared to 30Fe41P glass are revealed, and it is another confirmation of the mainly depolymerizing role manifested by iron ions.…”

Bubble formation in nuclear glasses: A review

“…Attempts to simulate alpha decay by either multi beam or dual beam experiments have provided ambiguous results, in part because they have used differing experimental conditions including glass composition, temperature, ion energy and type of analysis. Analysis of a simple glass composition using SEM (Dube, 2016) indicated bubble formation, but the same result has not been explicitly seen in other work: SEM analysis of SON68 glass (Fares, 2012) did not reveal bubble formation and work on a 3-component glass (Mir, 2015) using Raman spectroscopy found no direct evidence for formation of molecular oxygen. This latter study provided a rigorous approach to determining the effect of the irradiation scheme on the chemical structure of the glass and may have important implications regarding whether bubble formation occurs under any irradiation regime, or whether the regime itself can prevent it.…”

“…Where simple glasses are investigated, all of the studies provide evidence for bubbles or cavities. Out of the five studies, only two used techniques to detect cavities (bubble structures): either SAXS (Terekhov, 2006) or SEM (Dube, 2016). Both of these studies use helium ions but at very different energies: 1-2 MeV and 30 keV-2 MeV, as shown in Figure 6.…”

“…To date a variety of glass compositions have been studied by ion beam irradiation, mainly the French SON68 glass as well as a variety of simple glasses. Irradiation has tended to utilize helium ions to investigate the effect of alpha decay although gold, 27,28 xenon, 29 bismuth 30 and lead 24 have also been used in studies where the formation of molecular oxygen has been observed or postulated. The energy and fluence of the ion beam is important in determining how the ion beam interacts with the glass.…”