The mechanism for diamagnetic products formation under the radiolysis of alkali nitrates |
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| Institution: | Department of Analytical Chemistry, Kemerovo State University, Krasnaya Street, 6, Kemerovo 650043, Russian Federation;Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziadzka 5, 87-100 Torun, Poland;Kuban State University, Stavropolskaya Street 149, Krasnodar 350040, Russia;Kuban State University, Stavropolskaya Street 149, Krasnodar 350040, Russia;Wigner Research Centre for Physics, Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33, H-1121 Budapest, Hungary |
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| Abstract: | Based on optical measurements, the kinetics of peroxynitrite accumulation in alkali nitrate crystals γ-irradiated at 310 K has been investigated. The initial radiation chemical yields were calculated to be 0.60±0.05, 0.14±0.03, 0.35±0.03, 0.65±0.04 (100 eV)?1 for NaNO3, KNO3, RbNO3, and CsNO3, respectively. The mechanism for the radiolysis of crystalline alkali nitrates is interpreted in terms of formation of the peroxynitrite ions and the nitrite ions from high-energy singlet and triplet excited states of the nitrate ions, respectively. These states can be generating under the radiationless transitions of electrons from the cation conductivity band into the anion conductivity band accompanied by the Auger excitation of the nitrate ions. |
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