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Laser-induced decomposition of HNS at 263nm

YI SUN1,* , YEWEI XU1

Affiliation

  1. Engineering Research Center of Biomass Materials, Ministry of Education, School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, Sichuan, China

Abstract

The laser-induced decomposition of solid HNS (2,2’,4,4’,6,6’-hexanitrostillbene) at 263 nm, induced by an 8-picosecond (ps) laser, has been studied by UV-Vis spectra, X-ray photoelectron spectroscopy (XPS) and mass spectra. The new peak at 310nm in UV-Vis spectra and the new peaks of N 1s XPS spectra at ~401 eV and O 1s XPS spectra at about ~528 eV suggest that a nitro-nitrite isomerization reaction with subsequent release of NO occurs in the decomposition process. Moreover, the appearance of 224m/z in mass spectra verifies that the fragmentation of trans-C=C bond takes place in the decomposition. The temperature risen within the irradiated sample volume has been calculated by integrating the heat conduction equation and the results show that there is a very low temperature rise of less than 40 K under our experimental conditions, which has been illustrated that the photochemical effect is the dominant reaction in the decomposition. The results will allow for better improvement of the stock reliability performance and detonation reaction process of HNS..

Keywords

Laser-induce decomposition, HNS, Nitro-nitrite isomerization, The fragmentation of trans-C=C bond.

Submitted at: Dec. 2, 2021
Accepted at: Aug. 10, 2022

Citation

YI SUN, YEWEI XU, Laser-induced decomposition of HNS at 263nm, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 7-8, pp. 332-337 (2022)