Studies in useful hard x-ray photochemistry: decomposition of potassium halates

18th APS-SCCM; 24th AIRAPT

Pravica, Michael^1 ; Hulsey, Brent^1 ; Bai, Ligang^1 ; Sneed, Daniel^1 ; Smith, Quinn^1 ; Guardala, Griffin^1

High Pressure Science and Engineering Center (HiPSEC), Department of Physics, University of Nevada Las Vegas (UNLV), Nevada

LV

89154-4002, United States^1

关键词: Decomposition rate;    Diamond-anvil cell;    Effect of oxygen;    Glass capillaries;    Ionization events;    Monochromatic x-rays;    Radiation-induced decomposition;    Systematic study;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/2/022009/pdf
DOI  :  10.1088/1742-6596/500/2/022009

来源: IOP

【 摘 要 】

We performed a systematic study of radiation-induced decomposition rates of KClO3, KClO4, KBrO3and KIO3in glass capillaries using the monochromatic x-ray. We also performed a complementary white beam x-ray study to verify the presence of molecular oxygen released from the acatalytic, isothermal chemical reactions initiated by hard x-rays using a diamond anvil cell to seal the samples. The aim of these studies entailed better-understanding the effect of oxygen-oxygen distance and oxygen multiplicity in determining the x-ray induced decomposition rate of potassium halates to aid useful hard x-ray induced chemistry. The observed decomposition rate appears to strongly and inversely correlate with O-O distance which suggests that ionization events of oxygen atoms from the halate groups occur nearly simultaneously and irreversible chemical reaction of two ionized oxygen radicals occurs with a higher probability when they are closer to one another.