Ion beam induced luminescence studies of LiAlO2 using negative ions. (November 2016)

• Record Type: Journal Article
• Authors: Qiu, Menglin; Chu, Yingjie; Wang, Guangfu; Xu, Mi; Zheng, Li
• Is Part Of: Radiation measurements. Volume 94(2016:Nov.)
• Page Start: 49
• Page End: 52
• Publication Date: 2016-11
• Subjects: Negative ion irradiation -- Luminescence -- LiAlO2 -- Defect; Nuclear emulsions -- Periodicals; Particle tracks (Nuclear physics) -- Periodicals; Thermoluminescence -- Periodicals; Cosmic rays -- Periodicals; Radiation -- Measurement -- Periodicals; Radiometry -- Periodicals; Radiation Monitoring -- Periodicals; Émulsions nucléaires -- Périodiques; Particules (Physique nucléaire) -- Traces -- Périodiques; Thermoluminescence -- Périodiques; Rayonnement cosmique -- Périodiques; Radiométrie -- Périodiques; 539.77
• DOI: 10.1016/j.radmeas.2016.09.005
• Languages: English
• ISSNs: 1350-4487

Abstract

Abstract: Lithium aluminate (LiAlO2 ) is the candidate material for solid tritium breeder applied in the developing fusion reactors. The research of its defect behavior under ion irradiation was proceeded in the negative ions induced luminescence setup of the GIC4117 Tandem accelerator in Beijing Normal University. The ion beam induced luminescence (IBIL) measurement was performed by 20 keV H − ions at room temperature. The luminescence spectra showed seven emission bands: the 4.55 eV may due to a self-trapped exciton (STE), the 4.06 eV and the 1.72 eV may due to impurity or intrinsic defect, the 3.54 eV due to F center, the 3.20 eV due to F + center, the 2.93 eV due to F2 center, the 2.30 eV due to F-center aggregates (Fn center), respectively. The intensity evolutions of each band with fluence were presented and the corresponding mechanisms were discussed. Highlights: Ion beam induced luminescence measurement from LiAlO2 using negative ions is firstly carried out. F +, F and F2 centers emission intensity keeps decreasing with the increase of fluence. The intensity of Fn center emission grows obviously in the early stage of irradiation and then gradually decreased to the end. Results obtained verify the possibility of negative ion beam induced luminescence setup for real-time monitoring of irradiation damage.