학술논문
Effect of prior structural defects in quartz fiber lightguides on defect formation by I3 radiation
Document Type
Report
Author
Source
Atomic Energy. Jan, 2008, Vol. 104 Issue 1, p33, 5 p.
Subject
Language
English
ISSN
1063-4258
Abstract
The absorption spectra of unirradiated and irradiated (to fast neutron fluence 10.sup.12 and10.sup.14 cm.sup.-2 in VVR-SM) quartz-quartz fibers after additional irradiation with 60.sup.Co I3 rays to 10.sup.8 rad are investigated. It is shown that neutrons transform E centers into a!Si-Sia! centers. The kinetics of accumulation of bridge oxygen atoms under the action of I3 radiation exhibits two stages. The first stage is due to neutron irradiation and the manifestation of preliminary potential centers of nonbridge oxygen atoms. The second stage is associated with the creation of additional nonbridge oxygen atoms under the action of I3 radiation. The I3-ray dose for the onset of the second stage decreases as the fluence of the preliminary neutron irradiation increases.