Open AccessDose Response of the E1’ Centre in Quartz
Author(s) -
Shin Toyoda,
Mana Amimoto
Publication year - 2021
Publication title -
geochronometria
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.626
H-Index - 31
eISSN - 1897-1695
pISSN - 1733-8387
DOI - 10.2478/geochr-2020-0037
Subject(s) - quartz , electron paramagnetic resonance , irradiation , materials science , electron , gamma ray , gamma irradiation , electron beam processing , resonance (particle physics) , atomic physics , radiochemistry , nuclear magnetic resonance , analytical chemistry (journal) , nuclear physics , chemistry , physics , composite material , chromatography
The E 1 ’ centre is one of the most common paramagnetic defects observed by electron spin resonance (ESR) in natural quartz, the formation of which is, however, quite complicated. The dose response to gamma ray irradiation of the E 1 ’ centre in natural quartz was systematically investigated in the present study to find that its dose response depends on the heating conditions of the sample before irradiation. The signal intensity decreases on irradiation when quartz has been heated up to 300°C, while it increases when heated above 400°C. The phenomena can be explained by the electronic processes that heating supplies electronic holes to the oxygen vacancies while gamma ray irradiation supplies electrons.