Effects of γ-Ray irradiation on colour and fluorescence of pearls
スポンサーリンク
概要
- 論文の詳細を見る
The colour of cultured pears of P. fucata can be changed by γ-ray irradiation, which has been applied to pearl processing. The effect of γ-ray irradiation on the colour and fluorescence of pearls was investigated experimentally. The experimental results show that a colour change of pearls to bluish-grey is mainly responsible for a decrease in the reflection factor of the nuclei. Furthermore, a significant change in the fluorescence spectra has been observed for pearls and nuclei. These changes are considered to be caused by the degradation of conchiolin contained in the nacre. Fluorescence from pearls is not affected by the nuclei, but the colour of pears is affected. Thus, the fluorescence method is suitable for investigating the effect of γ-ray irradiation on the nacre.
- 社団法人応用物理学会の論文
- 1988-02-20
著者
-
MIYOSHI Tadaki
Technical College, Yamaguchi University
-
MATSUDA Yasunori
Pearl Research Laboratory, K. MIKIMOTO & Co., Ltd.
-
Miyoshi Tadaki
Technical Colledge Yamaguchi University
-
Matsuda Yasunori
Pearl Research Laboratory K. Mikimoto & Co. Ltd.
関連論文
- Characterization of GaAs and AlGaAs layers grown by laser atomic layer epitaxy
- Effects of an Electric Field on the Decay Time of Luminescence from a GaAs/Ga_Al_As Multi-Quantum-Well Structure
- Transient Characteristics of Luminescence from GaAs/Ga_Al_As Multi-Quantum-Well Structure under Resonant Excitation
- Effect of Electric Field on Transient Characteristics of Luminescence from GaAs/Ga_Al_As Multi-Quantum-Well Structure
- Temperature Dependence of Decay Time of Photoluminescence from GaAs/Ga_Al_As Multi Quantum Well Structures
- Transient Characteristics of Photoluminescence from GaAs/Ga_Al_As Single Quantum Well Structure
- Lifetime and diffusion coefficient of carriers in X-ray irradiated a-Si:H
- Fluorescence from pearls and shells of black lip oyster, Pinctada margaritifera, and its contribution to the distinction of mother oysters used in pearl culture
- Fluorescence from pearls to distinguish mother oysters used in pearl culture
- Fluorescence from pearls under N_2 laser excitation and its application to distinction of mother oysters
- Fluorescence from pigments in fresh and stored oil colours under N_2 laser excitation
- Fluorescence from varnishes for oil paintings under N_2 laser excitation
- Laser-induced fluorescence and optical reflection spectra of Japanese natural dyes on silk
- Laser-induced fluorescence of oil colours and its application to the identification of pigments in oil paintings
- Fluorescence from pearls of freshwater bivalves and its contribution to the distinction of mother oysters used in pearl culture
- Fluorescence from oil colours, linseed oil and poppy oil under N_2 laser excitation
- Fluorescence from resins for oil painting under N_2 laser excitation
- Time-resolved luminescence spectra of dosimeter glasses
- Fluorescence from colours used for japanese painting under N_2 laser excitation
- Effects of γ-Ray irradiation on colour and fluorescence of pearls
- Laser-Induced Fluorescence of Pearls a Shells of Genus Haliotis and Their Comparison to Other Species Used in Pearl Culturing