Change in the Optical Properties of BaSO4 Powder Modified with SiO2 Nanoparticles upon Sequential and Separate Irradiation by Quanta of Solar Spectrum and Protons

Статья в журнале

A comparative analysis of changes in the diffuse reflectance spectra (ρλ) and the integrated absorption coefficient in the range of 0.2–2.2 μm is performed after the separate and sequential irradiation of a bariumsulfate powder modified with silicon-dioxide nanoparticles (mBaSO4/nSiO2) with 5-keV protons and solar-radiation quanta. The spectra are recorded after each irradiation cycle in vacuum within the irradiation region (in situ). The integrated solar-radiation absorption coefficient of the modified mBaSO4/nSiO2 pigment before irradiation is 0.048, which is several times lower than that of ZnO pigment widely used around the world. The additivity coefficient calculated from the results of sequential and separate irradiation of the mBaSO4/nSiO2 powder decreases by a factor of 7.5–1.052 with an increase in the fluence of 5-keV protons. Assessment of the additivity changes under the action of the spectrum of charged particles in geostationary orbit (as one of the most used and with the most severe radiation conditions) shows that the nonadditivity of separate and sequential exposure to protons and solar-radiation quanta on the pigment for mBaSO4/nSiO2 thermal-control coatings will persist for 1.27 years under these irradiation parameters.

Журнал:

• Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques
• Pleiades Publishing, Ltd. (New York City)
• Индексируется в Scopus, Web of Science

Библиографическая запись: Mikhailov, M. M. Change in the Optical Properties of BaSO4 Powder Modified with SiO2 Nanoparticles upon Sequential and Separate Irradiation by Quanta of Solar Spectrum and Protons [Electronic resource] / M. M. Mikhailov, A. N. Lapin, S. A. Yuryev // Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. – 2023. – Vol. 17. – Iss. 5. – P. 1103-1109. – DOI: 10.1134/S1027451023050270