SELF-TRAPPED EXCITON LUMINESCENCE IN ALPHA-QUARTZ

Authors
TRUKHIN AN
Citation
An. Trukhin, SELF-TRAPPED EXCITON LUMINESCENCE IN ALPHA-QUARTZ, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 91(1-4), 1994, pp. 334-337
Citations number
16
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
91
Issue
1-4
Year of publication
1994
Pages
334 - 337
Database
ISI
SICI code
0168-583X(1994)91:1-4<334:SELIA>2.0.ZU;2-8
Abstract
It is shown that two differently oriented (perpendicular and parallel to the c axis) self-trapped excitons (STE(perpendicular-to) and STE(pa rallel-to)) can be created in the range of the Urbach tail of the fund amental absorption of a-quartz. Below this tail no STE luminescence wa s found. The alkali ion centers, excited below the tail, give luminesc ence bands, which can be replaced by substituting alkali ions with Cu ions. It is concluded that both STE(parallel-to) and STE(perpendicula r-to) are intrinsic.