Positionally dependent 15N fractionation factors in the UV photolysis of N2O determined by high resolution FTIR spectroscopy

Authors

Fred Turatti, University of Wollongong
D W. T Griffith, University of WollongongFollow
Stephen Wilson, University of WollongongFollow
Michael Esler, University of Wollongong
T Rahn, California Institute of Technology
H Zang, California Institute of Technology
G A. Blake, California Institute of Technology

RIS ID

4586

Publication Details

Turatti, F., Griffith, D. W. T., Wilson, S. R., Esler, M. B., Rahn, T., Zang, H. & Blake, G. A. (2000). Positionally dependent 15N fractionation factors in the UV photolysis of N2O determined by high resolution FTIR spectroscopy. Geophysical Research Letters, 27 (16), 2489-2492.

Abstract

Positionally dependent fractionation factors for the photolysis of isotopomers of N₂O in natural abundance have been determined by high resolution FTIR spectroscopy at three photolysis wavelengths. Fractionation factors show clear ¹⁵N position and photolysis wavelength dependence and are in qualitative agreement with theoretical models but are twice as large. The fractionation factors increase with photolysis wavelength from 193 to 211 nm, with the fractionation factors at 207.6 nm for ¹⁴N¹⁵N¹⁶O, ¹⁵N¹⁴N¹⁶O and ¹⁴N¹⁴N¹⁸O equal to −66.5±5‰,−27.1±6‰ and −49±10‰, respectively.