Preparation of New Scintillation Imaging Material Composed of Scintillator-Silica Fine Powders and its Imaging of Tritium.
A new scintillation imaging material [scintillator-silica fine powder (FP)] was prepared using silica FPs and scintillator-encapsulating silica nanoparticles (NPs) (scintillator-silica NPs). The wt% values of scintillator-silica NPs on the scintillator-silica FPs were 38, 43, 36 and 44%. Scintillation images of 3H, 63Ni, 35S, 33P, 204Tl, 89Sr and 32P dropped on the scintillator-silica FPs were obtained at about 37 kBq per 0.1-10 µl with a charge-coupled device (CCD) imager for a 5 min exposure. In particular, high-intensity CCD images of 35S were selectively obtained using the 2.25, 4.77 and 10 µm silica FPs with scintillator-silica NPs owing to the residual S of dimethyl sulfoxide in the preparation. Scintillation images of 3H at 1670 ± 9 Bq/0.5 µl and 347 ± 6 Bq/0.5 µl dropped in a 2 mm hole on the scintillator-silica FPs (6.78 and 10 µm) were also obtained using the CCD imager for a 2 h exposure.
Radioisotope Research Center, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan.
Hirokazu
H
Miyoshi
Tachibana Mining Station, HIROURA Corporation, 40-8 Koda, Tachibana-cho, Anan City, Tokushima 774-0023, Japan.
Mitsunori
M
Hiroura
Shikoku TLO, 2217-20 Hayashi-cho, Takamatsu City, Kagawa 761-0396, Japan.
Kazunori
K
Tsujimoto
Radioisotope Research Center, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan.|Graduate School of Pharmaceutical Sciences, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan.
Namiko
N
Irikura
Radioisotope Research Center, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan.
Tamaki
T
Otani
Graduate School of Pharmaceutical Sciences, Tokushima University, 1-78 Shomachi, Tokushima 770-8505, Japan.|Institute for Genome Research, Tokushima University, 3-18-15 Kuramoto-cho, Tokushima 770-8503, Japan.
Yasuo
Y
Shinohara
D011208:Powders; D012588:Scintillation Counting; D012822:Silicon Dioxide; D014316:Tritium
D011208:Powders; D014316:Tritium; D012822:Silicon Dioxide