The absorption spectrum of D2: ultrasensitive cavity ring down spectroscopy of the (2-0) band near 1.7 μm and accurate ab initio line list up to 24,000 cm(-1)

The Journal of Chemical Physics
S KassiJacek Komasa

Abstract

Eleven very weak electric quadrupole transitions Q(2), Q(1), S(0)-S(8) of the first overtone band of D(2) have been measured by very high sensitivity CW-cavity ring down spectroscopy (CRDS) between 5850 and 6720 cm(-1). The noise equivalent absorption of the recordings is on the order of α(min) ≈ 3 × 10(-11) cm(-1). By averaging a high number of spectra, the noise level was lowered to α(min) ≈ 4 × 10(-12) cm(-1) in order to detect the S(8) transition which is among the weakest transitions ever detected in laboratory experiments (line intensity on the order of 1.8 × 10(-31) cm/molecule at 296 K). A Galatry profile was used to reproduce the measured line shape and derive the line strengths. The pressure shift and position at zero pressure limit were determined from recordings with pressures ranging between 10 and 750 Torr. A highly accurate theoretical line list was constructed for pure D(2) at 296 K. The intensity threshold was fixed to a value of 1 × 10(-34) cm/molecule at 296 K. The obtained line list is provided as supplementary material. It extends up to 24,000 cm(-1) and includes 201 transitions belonging to ten v-0 cold bands (v = 0-9) and three v-1 hot bands (v = 1-3). The energy levels include the relativistic and quantu...Continue Reading

References

Oct 1, 1986·Physical Review A: General Physics·J D Kelley, S L Bragg
May 2, 2009·The Journal of Chemical Physics·Krzysztof Pachucki, Jacek Komasa
Mar 12, 2010·Applied Optics·Haifeng Huang, Kevin K Lehmann
Apr 29, 2010·The Journal of Chemical Physics·Jinjun LiuFrédéric Merkt
Aug 6, 2010·Physical Chemistry Chemical Physics : PCCP·Krzysztof Pachucki, Jacek Komasa
Oct 11, 2011·Journal of Chemical Theory and Computation·Jacek KomasaKrzysztof Pachucki
Nov 10, 2009·Journal of Chemical Theory and Computation·Konrad PiszczatowskiBogumil Jeziorski

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Citations

Dec 27, 2012·The Journal of Chemical Physics·Samir Kassi, Alain Campargue
Dec 17, 2014·The Journal of Chemical Physics·Krzysztof Pachucki, Jacek Komasa
May 9, 2019·Physical Chemistry Chemical Physics : PCCP·Krzysztof Pachucki, Jacek Komasa
Apr 16, 2020·Physical Chemistry Chemical Physics : PCCP·K-F LaiE J Salumbides
May 30, 2020·Physical Chemistry Chemical Physics : PCCP·Alain CampargueSergei N Yurchenko
May 15, 2018·Physical Review Letters·T Madhu TrivikramE J Salumbides
May 15, 2018·Physical Review Letters·F M J CozijnW Ubachs

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Methods Mentioned

BETA
ring down

Software Mentioned

CW
CRDS

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