Abstract
We have previously found (Toyoda and Schwarcz, in press) that γ-ray irradiation of granitic quartz produces a distinct ESR signal which overlaps the E 1′ centre signal; this signal is removed by a heat treatment at 170°C for 15 min. Here we report the presence of this ‘counterfeit’ E 1[′ signal in irradiated samples from fault gouge taken from the Hayward fault California. The contribution of the counterfeit E 1′ signal to the total apparent E 1′ centre signal intensity is significant and appears to account for most of the growth of the combined signal with irradiation. The intensity of the ‘real’ E 1′ centre signal rises abruptly between irradiation doses of 300 and 1000 Gy, after removing the contribution of the counterfeit signal by heating.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
