AN ESR STUDY OF RADICALS IN CACO3 PRODUCED BY 1.6-MEV HE-IRRADIATION AND GAMMA-IRRADIATION()

Authors
KOHNO H YAMANAKA C IKEYA M IKEDA S HORINO Y
Citation
H. Kohno et al., AN ESR STUDY OF RADICALS IN CACO3 PRODUCED BY 1.6-MEV HE-IRRADIATION AND GAMMA-IRRADIATION(), Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 91(1-4), 1994, pp. 366-369
Citations number
13
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
366 - 369
Database
ISI
SICI code
0168-583X(1994)91:1-4<366:AESORI>2.0.ZU;2-Z
Abstract
The effects of charged-particle irradiation on the formation of defect s in CaCO3 have been studied using electron spin resonance (ESR). An o rthorhombic CO2- was dominant in powdered synthetic aragonite irradiat ed by 1.6 MeV He+, while both orthorhombic and isotropic CO2- were obs erved in gamma-irradiated aragonite powder. G-values (number of defect s per 100 eV) for alpha- and gamma-rays were obtained to be G(alpha) = 0.0041 and G(gamma) = 0.27 for aragonite leading to a k-value (alpha- ray efficiency) of 0.015.