The cavity-enhanced absorption spectrum of NH3 in the near-infrared region between 6850 and 7000cm−1

O’Leary, D.M.; Orphal, J.; Ruth, Albert A.; Heitmann, Uwe; Chelin, P.; Fellows, C. E.

doi:10.1016/j.jqsrt.2007.12.007

Cited by 19 publications

(7 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fellows (2005). We note that 08LeOrRuHe [120] reported an unassigned FTS spectrum in this region, alongside an unassigned CDEAS spectrum recorded at higher frequencies, but the line positions do not correspond with those reported by 07LiLeXu.…”

Section: Comments On the Data Sourcescontrasting

confidence: 78%

MARVEL analysis of the measured high-resolution spectra of 14NH3

Derzi

Furtenbacher

Tennyson

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

a b s t r a c tAccurate, experimental rotational-vibrational energy levels and line positions, with associated labels and uncertainties, are reported for the ground electronic state of the symmetric-top 14 NH 3 molecule. All levels and lines are based on critically reviewed and validated high-resolution experimental spectra taken from 56 literature sources. The transition data are in the 0.7-17 000 cm À 1 region, with a large gap between 7000 and 15 000 cm À 1 . The MARVEL (Measured Active Rotational-Vibrational Energy Levels) algorithm is used to determine the energy levels. Out of the 29 450 measured transitions 10 041 and 18 947 belong to ortho-and para-14 NH 3 , respectively. A careful analysis of the related experimental spectroscopic network (SN) allows 28 530 of the measured transitions to be validated, 18 178 of these are unique, while 462 transitions belong to floating components. Despite the large number of spectroscopic measurements published over the last 80 years, the transitions determine only 30 vibrational band origins of 14 NH 3 , 8 for ortho-and 22 for para-14 NH 3 . The highest J value, where J stands for the rotational quantum number, for which an energy level is validated is 31. The number of experimental-quality ortho-and para-14 NH 3 rovibrational energy levels is 1724 and 3237, respectively. The MARVEL energy levels are checked against ones in the BYTe firstprinciples database, determined previously. The lists of validated lines and levels for 14 NH 3 are deposited in the Supporting Information to this paper. Combination of the MARVEL energy levels with first-principles absorption intensities yields a huge number of experimental-quality rovibrational lines, which should prove to be useful for the understanding of future complex high-resolution spectroscopy on 14 NH 3 ; these lines are also deposited in the Supporting Information to this paper.

show abstract

Section: Comments On the Data Sourcescontrasting

confidence: 78%

MARVEL analysis of the measured high-resolution spectra of 14NH3

Derzi

Furtenbacher

Tennyson

et al. 2015

Journal of Quantitative Spectroscopy and Radiative Transfer

View full text Add to dashboard Cite

show abstract

“…were measured, by O'Leary et al[344], with off-axis CW-CEAS at 0.2 mbar (6880-6997 cm -1 ) and at 11.5 mbar (6850-6997 cm -1 ). A total of 1117 NH 3 lines are contained in the spectrum.…”

mentioning

confidence: 99%

The 2015 edition of the GEISA spectroscopic database

Jacquinet-Husson

Armante

Scott

et al. 2016

Journal of Molecular Spectroscopy

Self Cite

329

198

View full text Add to dashboard Cite

The GEISA database (Gestion et Etude des Informations Spectroscopiques Atmosphériques: Management and Study of Atmospheric Spectroscopic Information) has been developed and maintained by the ARA/ABC(t) group at LMD since 1974. GEISA is constantly evolving, taking into account the best available spectroscopic data. This paper presents the 2015 release of GEISA (GEISA-2015), which updates the last edition of 2011 and celebrates the 40th anniversary of the database. Significant updates and additions have been implemented in the three following independent databases of GEISA. The “line parameters database” contains 52 molecular species (118 isotopologues) and transitions in the spectral range from 10−6 to 35,877.031 cm−1, representing 5,067,351 entries, against 3,794,297 in GEISA-2011. Among the previously existing molecules, 20 molecular species have been updated. A new molecule (SO3) has been added. HDO, isotopologue of H2O, is now identified as an independent molecular species. Seven new isotopologues have been added to the GEISA-2015 database. The “cross section sub-database” has been enriched by the addition of 43 new molecular species in its infrared part, 4 molecules (ethane, propane, acetone, acetonitrile) are also updated; they represent 3% of the update. A new section is added, in the near-infrared spectral region, involving 7 molecular species: CH3CN, CH3I, CH3O2, H2CO, HO2, HONO, NH3. The “microphysical and optical properties of atmospheric aerosols sub-database” has been updated for the first time since 2003. It contains more than 40 species originating from NCAR and 20 from the ARIA archive of Oxford University. As for the previous versions, this new release of GEISA and associated management software facilities are implemented and freely accessible on the AERIS/ESPRI atmospheric chemistry data center website

show abstract

“…The ammonia spectrum has been extensively studied in the region between 6300 and 7000 cm –1 [25,33,34,35,36], where over 43 vibrational combination bands have been predicted by ab initio calculations [37]. The measured line positions in Figure 2b match the line positions reported in HITRAN (Figure 2c) within the instrument resolution [26].…”

Section: Resultsmentioning

confidence: 68%

Off-Axis Cavity-Enhanced Absorption Spectroscopy of 14NH3 in Air Using a Gain-Switched Frequency Comb at 1.514 μm

Chandran

Ruth

Martin

et al. 2019

Sensors

View full text Add to dashboard Cite

A custom-designed gain-switched frequency comb (GSFC) source was passively coupled to a medium finesse (F ≈ 522) cavity in off-axis configuration for the detection of ammonia (14NH3) in static dry air. The absorption of ammonia was detected in the near infrared spectral region between 6604 and 6607 cm−1 using a Fourier transform detection scheme. More than 30 lines of the GSFC output (free spectral range 2.5 GHz) overlapped with the strongest ro-vibrational ammonia absorption features in that spectral region. With the cavity in off-axis configuration, an NH3 detection limit of ∼3.7 ppmv in 20 s was accomplished in a laboratory environment. The experimental performance of the prototype spectrometer was characterized; advantages, drawbacks and the potential for future applications are discussed.

show abstract

The cavity-enhanced absorption spectrum of NH3 in the near-infrared region between 6850 and 7000cm−1

Cited by 19 publications

References 36 publications

MARVEL analysis of the measured high-resolution spectra of 14NH3

MARVEL analysis of the measured high-resolution spectra of 14NH3

The 2015 edition of the GEISA spectroscopic database

Off-Axis Cavity-Enhanced Absorption Spectroscopy of 14NH3 in Air Using a Gain-Switched Frequency Comb at 1.514 μm

Contact Info

Product

Resources

About