Scintillation and Dosimetric Properties of Monocrystalline and Polycrystalline Li2B4O7

Abstract

We have performed a comparative study on the scintillation and dosimetric properties of monocrystalline and polycrystalline Li 2 B 4 O 7 samples. The scintillation light yield of the monocrystalline Li 2 B 4 O 7 sample was higher than that of the polycrystalline Li 2 B 4 O 7 sample. In contrast, the thermoluminescence (TL) intensity of the polycrystalline Li 2 B 4 O 7 sample was higher than that of the monocrystalline Li 2 B 4 O 7 sample. These results can be explained by the difference in trap concentration between the monocrystalline and polycrystalline Li 2 B 4 O 7 samples. It has been assumed that the monocrystalline Li 2 B 4 O 7 sample shows a higher scintillation light yield owing to its lower trap concentration, and the polycrystalline Li 2 B 4 O 7 sample shows a higher TL intensity owing to its higher trap concentration.

Optical and Optically Stimulated Luminescence Properties of Ce-doped CsCl–CaCl2–ZnCl2 Glasses

“…In addition, while personal dose monitoring applications require an effective atomic number (Z eff ) close to that of the human body in terms of bioequivalence (Z eff = 7.29), based on the composition of C 5 H 40 O 18 N, (4) IP applications such as dental diagnostics require a large Z eff for high detection efficiency. Various material forms such as single crystals, (5)(6)(7) ceramics, (8)(9)(10)(11)(12)(13) and glasses (14,15) have been investigated for dosimeter applications, and glasses have industrial advantages such as a low production cost and high moldability in comparison with single crystals and ceramics. (16) However, only Ag-doped phosphate glasses have been commercially applied in practical use, (17,18) and there have been only a few reports on the TSL and OSL properties of glasses with a large Z eff .…”

TSL and OSL Properties of Cu-doped CaF2 Ceramics Prepared by Spark Plasma Sintering

“…Actually, commercially available personal dosimeters are equipped with phosphors with relatively low Z eff ; (4) for instance, Li 2 B 4 O 7 and Al 2 O 3 are used as TSL dosimeters. (5,6) Various investigations have been performed to improve the TSL or OSL characteristics by preparing several phosphors using different methods.…”

Characterization of Tm Concentration Dependence of Dosimetric Properties of NaMgF3

“…The development of higher performance dosimetric materials for more accurate measurement is still ongoing. (7)(8)(9)(10)(11)(12) The required properties of these materials are high luminescence intensity, dose linearity, low fading, and good energy response (small ionization quenching). In addition, high tissue equivalence, i.e., a low effective atomic number (Z eff ), has been preferred for personal dose monitoring.…”