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3. Mid-IR narrow bandwidth tuneable laser source for the FAMU experiment

Author

Baruzzo Marco, Suárez-Vargas José J., Stoychev Lyubomir I., Cabrera Humberto, Toci Guido, Moretti Luigi, Fasci Eugenio, Gianfrani Livio, Pizzolotto Cecilia, Mocchiutti Emiliano, Danailov Miltcho B., and Vacchi Andrea

Subjects
Physics, QC1-999
Abstract

The FAMU (Fisica degli Atomi MUonici) collaboration aims to measure the proton Zemach radius through muonic hydrogen (μp) spectroscopy. The experimental setup relies on a custom-developed pulsed mid-IR laser source that can be tuned over a specific 6780-6790 nm wavelength range needed to ignite the hyperfine transition of the μp ground state 1S (also known as spin-flip transition). The excitation is observed as a distinctive muonic X-rays emission resulting from the oxygen impurity present in the hydrogen target. The mid-IR emission is produced by Difference Frequency Generation (DFG) in a non-linear crystal, pumped with a fixed wavelength 1064 nm Nd-YAG laser and a tuneable Cr:forsterite laser centred on 1262 nm. This setup produces more than 1.2 mJ at 6780 nm with a linewidth smaller than 30 pm. The experiment requires the laser to run continuously 24/7 in a restricted/radiation-controlled area and for this reason a specifically developed control software permits to remotely act on the laser. The characterization of a series of different non-linear crystals was performed during the development of the laser, resulting in the choice of BaGa4Se7.

Published
2024
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4. High-precision HD spectroscopy near 1.53 µm.

Author

Gotti, Riccardo, Wójtewicz, Szymon, Marangoni, Marco, Gatti, Davide, Lamperti, Marco, Gianfrani, Livio, and Castrillo, Antonio

Subjects
CAVITY-ringdown spectroscopy, FREQUENCY combs, MOLECULAR spectroscopy, QUANTUM electrodynamics, SPECTROMETERS, OPTICAL frequency conversion
Abstract

In this study, we report highly precise and accurate measurements of the P(5), P(6), and O(3) transitions of the 2-0 band of HD occurring at approximately 1.5 µm. HD spectra were acquired in the pressure range of 100-900 Torr using a cavity ring-down spectrometer linked to an optical frequency comb. The line-shape analysis was performed using the Hartmann-Tran profile in the so-called β-corrected version. For the P(5) transition, we improved the accuracy of previous line center frequency determinations by more than two orders of magnitude. Moreover, for the P(5) and P(6) line centers, the total standard uncertainty is below 3 MHz, similar to those provided by quantum electrodynamics predictions, making them useful for direct comparisons that might foster future improvements of the theoretical model. [ABSTRACT FROM AUTHOR]

Published
2024
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10. On the 12C2H2 near-infrared spectrum: absolute transition frequencies and an improved spectroscopic network at the kHz accuracy level.

Author

Castrillo, Antonio, Fasci, Eugenio, Furtenbacher, Tibor, D'Agostino, Vittorio, Khan, Muhammad A., Gravina, Stefania, Gianfrani, Livio, and Császár, Attila G.

Abstract

Lamb dips of twenty lines in the P, Q, and R branches of the ν1 + ν3 + ν41 vibrational band of 12C2H2, in the spectral window of 7125–7230 cm−1, have been measured using an upgraded comb-calibrated frequency-stabilized cavity ring-down spectrometer, designed for extensive sub-Doppler measurements. Due to the large number of carefully executed Lamb-dip experiments, and to the extrapolation of absolute frequencies to zero pressure in each case, the combined average uncertainty of the measured line-center positions is 15 kHz (5 × 10−7 cm−1) with a 2-σ confidence level. Selection of the twenty lines was based on the theory of spectroscopic networks (SN), ensuring that a large number of transitions, measured previously by precision-spectroscopy investigations, could be connected to the para and ortho principal components of the SN of 12C2H2. The assembled SN contains 331 highly precise transitions, 119 and 121 of which are in the ortho and para principal components, respectively, while the rest remain in floating components. The para- and ortho-12C2H2 energy-level lists, determined during the present study, contain 82 and 80 entries, respectively, with an accuracy similar to that of the lines. Based on the newly assembled lists of para- and ortho-12C2H2 empirical energy levels, a line list, called TenkHz, has been generated. The TenkHz line list contains 282 entries in the spectral range of 5898.97–7258.87 cm−1; thus far, only 149 of them have been measured directly via precision spectroscopy. The TenkHz line list includes 35 intense lines that are missing in the HITRAN2020 database. [ABSTRACT FROM AUTHOR]

Published
2023
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11. Doppler-limited precision spectroscopy of HD at 1.4 μm: An improved determination of the R(1) center frequency

Author

Castrillo, Antonio, Fasci, Eugenio, Gianfrani, Livio, Castrillo, Antonio, Fasci, Eugenio, and Gianfrani, Livio

Subjects
Physics::Atomic Physics
Abstract

We report on the improved determination of the center frequency of a hydrogen deuteride vibration-rotation transition. As a result of a refined analysis of cavity ring-down absorption spectra, it was possible to quantify the influence of the hyperfine structure on the line center frequency of the weak 2-0 R(1) line, as retrieved in the Doppler-limited regime. It turns out that ignoring the hyperfine structure leads to an underestimation of the center frequency of about 350 kHz. The updated determination gives an absolute frequency of the R(1) centroid of 217 105 181.936 MHz with a global uncertainty of 76 kHz.

Published
2021

14. Optical Determination of Thermodynamic Temperatures from a C2H2 Line-Doublet in the Near Infrared

Author

Castrillo, Antonio, Fasci, Eugenio, Dinesan, Hemanth, Gravina, Stefania, Moretti, Luigi, Gianfrani, Livio, Castrillo, Antonio, Fasci, Eugenio, Dinesan, Hemanth, Gravina, Stefania, Moretti, Luigi, and Gianfrani, Livio

Abstract

This paper reports the implementation of Doppler-broadening gas thermometry by use of line-shape analysis of a line-doublet. The two spectral components are vibration-rotation transitions belonging to a pair of acetylene combination bands at a wavelength of 1.39 μm. Characterized by an extraordinary spectral fidelity in combination with high resolution, the spectrometer is based on two phase-locked extended-cavity diode lasers, one of them being referenced to an optical-frequency-comb synthesizer. The global analysis of 1180 spectra, which are recorded as a function of the C2H2 pressure at the constant temperature of the triple point of water, yields an optical determination of the thermodynamic temperature with a combined relative uncertainty (type A plus type B) of 23 parts per million. Similar results are obtained at the melting point of gallium (approximately 303 K). Furthermore, we apply line-absorbance analysis to the acquired spectra, demonstrating a reduction by a factor of approximately 6 of the statistical uncertainty for the retrieved gas temperature.

Published
2019

15. Frequency-comb-assisted precision laser spectroscopy of CHF3 around 8.6 μm.

Author

Gambetta, Alessio, Coluccelli, Nicola, Cassinerio, Marco, Fernandez, Toney Teddy, Gatti, Davide, Castrillo, Antonio, Ceausu-Velcescu, Adina, Fasci, Eugenio, Gianfrani, Livio, Santamaria, Luigi, Sarno, Valentina Di, Maddaloni, Pasquale, Natale, Paolo De, Laporta, Paolo, and Galzerano, Gianluca

Subjects
HAMILTONIAN systems, LASER spectroscopy, POLARONS, SYMMETRY (Physics), FLUOROFORM
Published
2015
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16. Dual-laser absorption spectroscopy of C2H2 at 1.4 μm

Author

Fasci, E., Odintsova, T. A., CASTRILLO, Antonio, De Vizia, M. D., Merlone, A., Bertiglia, F., MORETTI, Luigi, GIANFRANI, Livio, Fasci, E., Odintsova, T. A., Castrillo, Antonio, De Vizia, M. D., Merlone, A., Bertiglia, F., Moretti, Luigi, and Gianfrani, Livio

Subjects
Physics::Optics
Abstract

Spectroscopic parameters (line intensity factor, pressure self-broadening, and shifting coefficients) of C2H2 at 1.4 μm were accurately measured using a dual-laser approach, based upon the technique of optical phase locking. This generated an absolute frequency scale underneath the absorption spectra. A pair of extended-cavity diode laserswas used. One of them, the probe laser, is forced to maintain a precise frequency offset from a reference laser, which is an optical frequency standard based on noise-immune cavity-enhanced optical heterodyne molecular spectroscopy. Laser-gas interaction takes place inside an isothermal multipass cell that is stabilized at the temperature of the triple point of water. The fidelity in the observation of the shape associated to the Pe(14) line of the 2ν3 + ν5 band allowed us to measure the spectroscopic parameters, with a global uncertainty for the line strength of 0.22%.

Published
2016

17. Line-narrowing effects in the near-infrared spectrum of water and precision determination of spectroscopic parameters.

Author

Amodio, Pasquale, Moretti, Luigi, Castrillo, Antonio, and Gianfrani, Livio

Subjects
SPECTRUM analysis, ABSORPTION, RELAXATION (Gas dynamics), DOPPLER effect, SPEED measurements
Abstract

A dual laser absorption spectrometer operating at 1.39 μm was employed to acquire high-quality absorption spectra in coincidence with the 44,1 → 44,0 line of the H2 18O ?1 + ?3 band, at the temperature of the triple point of water. A rather sophisticated global fitting procedure was developed and used to simultaneously fit spectra across the explored pressure range, roughly between 1 and 4 Torr. Adopting the speed-dependent Galatry profile with a hypergeometric dependence of the collisional width and shift on the absorbers' velocity, we could take into account narrowing effects ascribed to collision-induced velocity changes and speed-dependence of relaxation rates. The global approach allowed us to implement and exploit some relevant physical constraints at the aim of reducing significantly statistical correlation issues among free parameters. Consequently, we demonstrated the possibility of determining pressure broadening and shifting parameters with high precision and accuracy, at the level of one part over 10³. Furthermore, even being in the Doppler regime, it was possible to determine the effective frequency of velocity-changing collisions for self-colliding H2 18O molecules. [ABSTRACT FROM AUTHOR]

Published
2014
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19. The line shape problem in the near-infrared spectrum of self-colliding CO2 molecules: Experimental investigation and test of semiclassical models.

Author

Casa, Giovanni, Wehr, Richard, Castrillo, Antonio, Fasci, Eugenio, and Gianfrani, Livio

Subjects
INFRARED spectra, MOLECULES, ABSORPTION, CHEMICAL reactions, SPECTRUM analysis
Abstract

An intensity-stabilized diode laser absorption spectrometer was developed and used to perform a highly accurate study of the line shape of CO2 absorption lines, in the spectral region around 5000 cm-1, belonging to the ν1+2ν20+ν3 combination band, at a temperature of 296.00 K. Standard and complex semiclassical models, including Dicke narrowing and speed-dependent broadening effects, were applied, tested, and compared in the pressure range between 0.7 and 4 kPa, in order to single out the model best reproducing the absorption profile and, hence, the physical situation of self-colliding CO2 molecules. Line intensity factors and self-broadening coefficients were determined. The 1-σ overall accuracy of our determinations is at a level of 0.1%, which is, to our knowledge, the highest ever reached. [ABSTRACT FROM AUTHOR]

Published
2009
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20. Highly accurate determinations of CO2 line strengths using intensity-stabilized diode laser absorption spectrometry.

Author

Casa, Giovanni, Parretta, Donatella A., Castrillo, Antonio, Wehr, Richard, and Gianfrani, Livio

Subjects
ABSORPTION spectra, EXCITON theory, MOLECULAR spectroscopy, SPECTROMETRY, INTERFEROMETERS, INTERFEROMETRY
Abstract

An intensity-stabilized laser absorption spectrometer, which incorporates a mirror-extended cavity diode laser, a temperature-stabilized gas cell, and a Michelson interferometer, was developed and applied to a highly accurate investigation of line intensity factors within the ν1+2ν20+ν3 combination band of carbon dioxide, around 2 μm wavelength, at a temperature of 296.0 K. This relatively complex apparatus enables one to observe the absorption line shape with high precision and accuracy in such a way that it is possible to retrieve the integrated absorbance with a relative uncertainty better than 0.1%. The absorption spectra were interpolated with the uncorrelated strong-collision model of Rautian and Sobel’man in order to take into account Dicke narrowing effects, thus obtaining an agreement at a level of a few parts per 10-5. We report line strength values for the R(2)–R(18) transitions with an unprecedented level of accuracy, in the range between 0.1% and 0.15%. Finally, we discuss the possibility of providing a first experimental test of the theoretical model for molecular line strengths based on the Herman-Wallis expansion. [ABSTRACT FROM AUTHOR]

Published
2007
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22. Recommended isolated-line profile for representing high-resolution spectroscopic transitions

Author

TENNYSON J, BERNATH P. F, CAMPARGUE A, CSÁSZÁR A. G, DAUMONT L, GAMACHE R. R, HODGES J. T, LISAK D, NAUMENKO O. V, ROTHMAN L. S, TRAN H, ZOBOV N. F, BULDYREVA J, BOONE C. D, DE VIZIA M. D, GIANFRANI, Livio, HARTMANN J, MCPHEAT R, WEIDMANN D, MURRAY J, NGO N. H, POLYANSKY O. L., Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères] (LIPhy), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Groupe de spectrométrie moléculaire et atmosphérique (GSMA), Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA (UMR_7583)), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Tennyson, J, Bernath, P. F., Campargue, A, Császár, A. G., Daumont, L, Gamache, R. R., Hodges, J. T., Lisak, D, Naumenko, O. V., Rothman, L. S., Tran, H, Zobov, N. F., Buldyreva, J, Boone, C. D., DE VIZIA, M. D., Gianfrani, Livio, Hartmann, J, Mcpheat, R, Weidmann, D, Murray, J, Ngo, N. H., and Polyansky, O. L.

Subjects
[PHYS]Physics [physics], water vapor, [CHIM]Chemical Sciences, high-resolution spectroscopy, IUPAC Physical and Biophysical Chemistry Division, line shifts, line profiles, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014
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23. Ab initio calculations of the spectral shapes of CO2 isolated lines including non-Voigt effects and comparisons with experiments

Author

Hartmann J. M, Tran H, Ngo N, Landsheere H. X, Chelin P, Lu Y, Liu A. W, Hu S. M, Casa G, Lepere M, Deliere Q, Dhyne M, Fissiaux L., GIANFRANI, Livio, CASTRILLO, Antonio, Hartmann, J. M., Tran, H, Ngo, N, Landsheere, H. X., Chelin, P, Lu, Y, Liu, A. W., Hu, S. M., Gianfrani, Livio, Casa, G, Castrillo, Antonio, Lepere, M, Deliere, Q, Dhyne, M, and Fissiaux, L.

Subjects
Ab initio calculations, Ab initio models, Absorption lines, Autocorrelation functions, Classical molecular dynamics, Fourier-Laplace transform, Intermolecular potentials, Line profiles, Line-shape model, Lorentz, Molecular gas, Molecular speed, Physically based, Pressure-broadening coefficients, Room temperature, Spectral shapes, Time dependence
Abstract

We present a fully ab initio model and calculations of the spectral shapes of absorption lines in a pure molecular gas under conditions where the influences of collisions and of the Doppler effect are significant. Predictions of the time dependence of dipole autocorrelation functions (DACFs) are made for pure CO2 at room temperature using requantized classical molecular dynamics simulations. These are carried, free of any adjusted parameter, on the basis of an accurate anisotropic intermolecular potential. The Fourier-Laplace transforms of these DACFs then yield calculated spectra which are analyzed, as some measured ones, through fits using Voigt line profiles. Comparisons between theory and various experiments not only show that the main line-shape parameters (Lorentz pressure-broadening coefficients) are accurately predicted, but that subtle observed non-Voigt features are also quantitatively reproduced by the model. These successes open renewed perspectives for the understanding of the mechanisms involved (translational-velocity and rotational-state changes and their dependences on the molecular speed) and the quantification of their respective contributions. The proposed model should also be of great help for the test of widely used empirical line-shape models and, if needed, the construction of more physically based ones.

Published
2013

24. Determination of the Boltzmann Constant by Means of Precision Measurements of H2(18)O Line Shapes at 1.39 micron

Author

MORETTI, Luigi, CASTRILLO, Antonio, Fasci E, De Vizia M. D, Casa G, Galzerano G, Merlone A, Laporta P, GIANFRANI, Livio, Moretti, Luigi, Castrillo, Antonio, Fasci, E, De Vizia, M. D., Casa, G, Galzerano, G, Merlone, A, Laporta, P, and Gianfrani, Livio

Abstract

We report on a new implementation of Doppler broadening thermometry based on precision absorption spectroscopy by means of a pair of offset-frequency locked extended-cavity diode lasers at 1:39 m. The method consists in the highly accurate observation of the shape of the 44;1 ! 44;0 line of the H2 18O 1 þ3 band, in a water vapor sample at thermodynamic equilibrium. A sophisticated and extremely refined spectral analysis procedure is adopted for the retrieval of the Doppler width as a function of the gas pressure, taking into account the Dicke narrowing effect, the speed dependence of relaxation rates, and the physical correlation between velocity-changing and dephasing collisions. A spectroscopic determination of the Boltzmann constant with a combined (type A and type B) uncertainty of 24 parts over 106 is reported. This is the best result obtained so far by means of an optical method. Our determination is in agreement with the recommended CODATA value.

Published
2013

25. Speed dependence of collision parameters in the H2O18 near-IR spectrum: Experimental test of the quadratic approximation

Author

De Vizia MD, CASTRILLO, Antonio, Fasci E, MORETTI, Luigi, Rohart F, GIANFRANI, Livio, De Vizia, Md, Castrillo, Antonio, Fasci, E, Moretti, Luigi, Rohart, F, and Gianfrani, Livio

Abstract

A laser absorption technique, based upon a pair of offset-frequency-locked extended-cavity diode lasers, was employed to perform line-shape measurements for H218O vibration-rotation transitions at 1.38 μm, with an extremely high spectral fidelity. This important feature was mostly ensured by the highly accurate, absolute, and repeatable frequency axis characterizing each acquired spectrum. We present the outcomes of a specific study of the speed dependence of collision parameters influencing the shape of the H218O absorption lines. More particularly, the performance of the quadratic approximation, either used alone or considered in conjunction with the Dicke narrowing effect, was investigated and compared to that of the confluent hypergeometric dependence. Hence, experimental evidences of the partial failure of the quadratic approximation are given and discussed. Finally, we investigate the possible influence of the choice of the speed-dependent line-shape model on the retrieved collisional parameters.

Published
2012

35. Isotope ratio analysis using DFB diode laser spectrometry

Author

KERSTEL E. R. TH, MEIJER H. A. J, VAN BURGEL H. A. J, IANNONE R. Q, ROMANINI D, MORVILLE J, GAGLIARDI G, AND JOST H. J., GIANFRANI, Livio, KERSTEL E. R., Th, Meijer, H. A. J., VAN BURGEL, H. A. J., Iannone, R. Q., Romanini, D, Morville, J, Gianfrani, Livio, Gagliardi, G, and AND JOST, H. J.

Published
2004

36. First field determination of the13C/12 C isotope ratio in volcanic CO2 by diode-laser spectrometry

Author

CASTRILLO, Antonio, TEDESCO, Dario, GIANFRANI, Livio, CASA G., VAN BURGEL M., Castrillo, Antonio, Casa, G., VAN BURGEL, M., Tedesco, Dario, and Gianfrani, Livio

Subjects
Diode laser spectroscopy, stable isotope ratios
Abstract

Carbon isotope ratio analysis using a laser-based technique has been performed in the field, on the gaseous emissions from an active volcano. We here describe that 13CO2/12CO2 determinations can be carried out in a quasi-continuous regime using a compact, selective and sensitive diode laser spectrometer at a wavelength of 2 μm. Within the Solfatara crater (near Naples, Italy), in a very harsh environment, we were able to determine relative 13CO2/ 12CO2 values, on the highest flux fumarole, with an accuracy of 0.5 %. Regular and frequent observations of the carbon isotopes in volcanic gases, which become possible with our methodology, are of the utmost importance for geochemical surveillance of volcanoes. © 2004 Optical Society of America.

Published
2004

37. Frequency-Comb-Calibrated Doppler Broadening Thermometry

Author

Gatti, Davide, Mills, Andrew A., De Vizia, Maria Domenica, Mohr, Christian, Hartl, Ingmar, Marangoni, Marco, Fermann, Martin, and Gianfrani, Livio

Subjects
ddc:530
Abstract

We describe an implementation of Doppler broadening thermometry based upon a room-temperature continuous-wave quantum cascade laser at 9.07 mu m, coherently phase locked to a thulium optical frequency comb centered at 2 mu m. The thermodynamic temperature is retrieved from the analysis of multiple-line absorption spectra of the NH3 nu(2) band, adopting semiclassical line-shape models and taking into full account the speed dependence of collisional broadening. We demonstrate that a precision of approximately five parts over 10(5) can be reached as a result of the analysis of only 90 absorption spectra, as acquired as a function of the gas pressure.

Published
2013
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38. Spectral reference line data for atmospheric monitoring

Author

Ebert, Volker, Stenger, Jörn, Zondlo, Mark A., Toon, Geoffrey C., Orphal, Johannes, Gordon, Iouli E., Rothman, Laurence S., Jacquinet-Husson, Nicole, Boutammine, Cherif, Armante, Raymond, Crépeau, Laurent, Chédin, Alain, Scott, Noelle A., Crevoisier, Cyril, Capelle, Virgine, Birk, Manfred, Wagner, Georg, Yurchenko, Sergey N., Tennyson, Jonathan, Tran, Ha, Hartmann, J.-M., Ngo, N. H., Gamache, Robert R., Lisak, Daniel, Persijn, Stefan, Zondy, Jean-Jacques, Brunzendorf, Jens, Petersen, Jan C., Rausch, Anne, Werhahn, Olav, Werwein, Viktor, Albert, Sieghard, Bauerecker, Sigurd, Boudon, Vincent, Champion, Jean-Paul, Niederer, Hans-Martin, Quack, Martin, Babikov, Yurii L., Mikhailenko, Semen N., Barbe, Alain, Tyuterev, Vladimir G., Buchholz, Bernhard, Böse, Norbert, Campargue, Alain, Leshchishina, Olga, Mondelain, Didier, Kassi, Samir, Castrillo, Antonio, Gianfrani, Livio, Marangoni, Marco, Laporta, Paolo, Galzerano, Gianluca, De Rosa, M., Gagliardi, G., Maddaloni, Pasquale, Malara, P., Mosca, S., Ricciardi, I., Rocco, A., Borri, S., Bartalini, S., Bartalini, Saverio, Cancio, P., Galli, I., Giusfredi, G., Mazzotti, Davide, De Natale, P., Gisi, M., Ortwein, Pascal, Serdyukov, Anton, Woiwode, W., Fateev, Alexander, Clausen, Sønnik, Forsting, Thomas, Vespoli, Ignacio, Maul, Christof, Hald, Jan, Nielsen, Lars, Leggett, Graham, Gardiner, Tom, Robinson, Rod, Nikitin, Andrei, Brown, L., Sung, K., Smith, M. A., Mantz, Arlan, Thomas, Xavier, Regalia, L., Daumont, Ludovic, Kochanov, R., Rey, M., Nwaboh, Javis Anyangwe, Pogány, Andrea, Schäfer, Klaus, Harig, Roland, Blumenstock, Thomas, Höfert, Norbert, Weber, Konradin, Starikova, Evgeniya, De Backer, Marie-Renée, Tashkun, Sergei, Vainio, Markku, Peltola, Jari, Merimaa, Mikko, Auwera, J. Vander, Herman, M., Amyay, B., Didriche, K., Foldes, T., Golebiowski, D., Tudorie, Marcel, Fayt, A., Wagner, Steven, Welzel, Stefan, Röpcke, J., Engeln, R., and Valková, Miroslava (Mirka)

Abstract

collection of articles based on oral presentation at the EUMETRISPEC workshop held at Wolfenbüttel castle and PTB Praunschweig, Nov. 15-16, 2012, PTB-Bericht Chemische Physik CP-8. ISSN 1614-953X. ISBN 978-3-95606-034-2., This PTB report comprises all oral presentations and posters presented at the Nov. 2012 workshop on "Spectral reference line data for atmospheric monitoring" held at Wolfenbüttel castle and PTB Braunschweig. The workshop was organized by the EUMETRISPEC project which is part of the European Metrology Research Programme (EMRP). The main aim was to present and discuss the stakeholders' views and needs. The stakeholders are from metrological organisations as well as from ground- and satellite-based monitoring networks and from quantum chemical modelling groups - in total 49 scientists representing 31 institutions from 12 nations. During the workshop, nine invited 45min-talks were given, covering spectroscopic and metrological key topics, accompanied by six additional presentations on EUMETRISPEC and the EMRP. The PTB report includes the authorized powerpoint presentations, as well as all 21 posters from 91 authors presented during the workshop.

Published
2013
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50. Line broadening investigation of the oxygen A band

Author

GIANFRANI, Livio, de Angelis M., Giorgio P., Inguscio M., Sasso A., Tino G. M., M. Inguscio, A. Sasso, M. Allegrini, Gianfrani, Livio, de Angelis, M., Giorgio, P., Inguscio, M., Sasso, A., and Tino, G. M.

Published
1996

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