Effects of γ-Ray irradiation on colour and fluorescence of pearls
Japanese journal of applied physics. Pt. 1, Regular papers & short notes Volume 27 Issue 2
Page 235-239
published_at 1988
Title
Effects of γ-Ray irradiation on colour and fluorescence of pearls
Creators
Matsuda Yasunori
Creator Keywords
pearl
γ-ray irradiation
laser-induced fluorescence
colour change
optical reflectance
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.
Languages
eng
Resource Type
journal article
Publishers
応用物理学会
Date Issued
1988
File Version
Author’s Original
Access Rights
open access
Relations
[ISSN]0021-4922
[NCID]AA10457675
[isVersionOf]
[URI]http://www.ipap.jp/jjap/index.htm
Schools
大学院理工学研究科（工学）