claude Amiot - Academia.edu (original) (raw)
Papers by claude Amiot
Journal of Physics B: Atomic and Molecular Physics, 1977
ABSTRACT Twenty-one spectral quasi-coincidences between CO laser lines and NO absorption lines ar... more ABSTRACT Twenty-one spectral quasi-coincidences between CO laser lines and NO absorption lines are given, sixteen of which have never been reported previously. In three cases the discrepancies between the frequencies are smaller than the Doppler width. Lamb-dip spectroscopy should be possible and also stabilisation of the CO laser on a hyperfine component of NO.
Molecular Physics, 1986
ABSTRACT Infrared fluorescence of Rb 2 in the region 4700 to 6500cm -1 , which arises when levels... more ABSTRACT Infrared fluorescence of Rb 2 in the region 4700 to 6500cm -1 , which arises when levels of C 1 Π u state are pumped by the 4765 and 4880 Å lines of an argon-ion laser, has been recorded at high resolution by Fourier transform spectrometry. It is assigned to the system C 1 Π u → 1 1 Π g , and the positions of levels up to ν = 68 in 1 1 Π g have been determined. Constants for the 1 1 Π g state of 85 Rb 2 are as follows: The dissociation energy, D e , for this state is estimated to be 1290 ± 30 cm -1 .
Chem Phys Lett, 1999
Infrared fluorescence of the KRb molecule in the spectral range 6500-8000 cm -1, arising when the... more Infrared fluorescence of the KRb molecule in the spectral range 6500-8000 cm -1, arising when the levels of the (3) 1Pi state are excited by the 457.9, 465.8, 472.7, and 476.5 nm lines of an argon-ion laser, has been recorded by Fourier transform spectrometry. A part of the fluorescence is assigned to the system (3) 1Pi-->(3) 1Sigma+. The (3) 1Sigma+ state energy levels up to v=15 have been determined. The main spectroscopic constants for this state are Te=13995.465 (10) cm -1, omegae=40.76310 (40) cm -1, omegaexe=-0.26988 (71)×10 -1 cm -1, Be=22.8215 (28)×10 -3 cm -1, Re=4.17125 Å. The unusual spacing of the vibrational levels reflects the ionic character of the state. Preliminary values for the strongly perturbed (3) 1Pi state are Te=21762.0, omegae=41.36, omegaexe=0.184, Be=28.82×10 -3 cm -1.
Prehistoire Et Protohistoire En Champagne Ardenne, 2001
Paléo, 1993
Dans cet article on decrit la methode de debitage de l'industrie du gisement de Montsaugeon (... more Dans cet article on decrit la methode de debitage de l'industrie du gisement de Montsaugeon (Haute-Marne). Il s'agit d'un systeme par surface de debitage alterne similaire a celui utilise dans le Clactonien de High-Lodge.
Journal of Molecular Spectroscopy, 2000
High-resolution spectra of the (3)1Pi --> (2)3Sigma+ system of the KRb molecule, obtained ... more High-resolution spectra of the (3)1Pi --> (2)3Sigma+ system of the KRb molecule, obtained after excitation with fixed frequencies Ar+ laser lines, were recorded on a Connes-type Fourier transform interferometer. Molecular constants of the first 14 vibrational levels of the (2)3Sigma+ state are determined. The RKR potential energy curve is derived. The main spectroscopic constants for this triplet electronic state of
Journal of Molecular Spectroscopy, 1986
The Asundi system (a' '2+-a311) of 13C160 has been studied between 3500 and 12 000 cm-' by high-r... more The Asundi system (a' '2+-a311) of 13C160 has been studied between 3500 and 12 000 cm-' by high-resolution Fourier transform spectroscopy. The 10 bands, O-O, O-l, t-0, I-1, l-2, 2-0, 2-1, 3-0,4-O, and 4-2, were analyzed taking into account the strong perturbations appearing in the a' 3Z+ (u = 0,. ,4) levels. Accurate perturbation parameters were obtained for all interacting states. 01 1986 Academic Press, Inc.
Journal of Molecular Spectroscopy, 1991
ABSTRACT Laser induced fluorescence spectra of the A1Σu+ → X1Σg+ system have been recorded by Fou... more ABSTRACT Laser induced fluorescence spectra of the A1Σu+ → X1Σg+ system have been recorded by Fourier transform spectrometry. The ground electronic state of the 39K2 molecule is characterized up to v = 75, encompassing 99.3% of the potential depth. A long-range study of the potential energy curve gave the coefficients of the multipolar expansion and the dissociation energy is found to be De = 4451 ± 1.5 cm−1 (0.5519 ± 0.0002 eV).
Journal of Molecular Spectroscopy, 1976
ABSTRACT
Journal of Molecular Spectroscopy, 1976
The infrared spectrum of 64 bands of the isotopic species 15N216O of nitrous oxide and of 37 band... more The infrared spectrum of 64 bands of the isotopic species 15N216O of nitrous oxide and of 37 bands of 14N218O have been analyzed. The studied spectral range extends from 1750 to 6000 cm-1 for 15N216O and from 1750 to 3100 cm-1 for 14N218O. The effective rotational constants are given for 44 levels of 15N216O comprising 21Sigma, 12Pi, 7Delta, 4Phi levels
The Journal of Chemical Physics, 1990
... Courbe potentiel. ; Constante moléculaire. ; Constante anharmonicité. ; Constante distorsion ... more ... Courbe potentiel. ; Constante moléculaire. ; Constante anharmonicité. ; Constante distorsion centrifuge. ; Constante rotation. ; Energie transition. ; ... Constante moléculaire. ; Constante anharmonicité. ; Constante distorsion centrifuge. ; Constante rotation. ; Energie transition. ; ...
The Journal of Chemical Physics, 1988
ABSTRACT The fluorescence spectra of the two electronic systems (3) 1&Pgr;u↠X 1∑g appeari... more ABSTRACT The fluorescence spectra of the two electronic systems (3) 1&Pgr;u↠X 1∑g appearing in the visible range and (3) 1&Pgr;u↠(2) 1∑g in the near infrared has been observed using an argon ion laser to excite Cs2 molecules. Fluorescence lines were accurately measured with a high resolution Fourier transform interferometer. Accurate molecular constants and potential energy curves have been determined for the (3) 1&Pgr;u electronic state. The main constants are as follows: Te(cm−1) =20 684.669; we(cm−1) =30.398; Be(cm−1) =0.009 12; Re(A˚) =5.2735. Possible correlation with the atomic limit 7 2P1/2+6 2S1/2 yields a dissociation energy De=4730±1 cm−1.
The Journal of Chemical Physics, 1988
ABSTRACT More than 8000 completely resolved rotational lines in the E 1Σ+u →X 1Σ+g, E 1Σ+g →(2)1Σ... more ABSTRACT More than 8000 completely resolved rotational lines in the E 1Σ+u →X 1Σ+g, E 1Σ+g →(2)1Σ+g, E 1Σ+u →(1)1Πg, E 1Σ+u →(3)1Σ+g, D 1Σ+u →(2)1Σ+g, C 1Σu →X 1Σ+g, and D 1Σ+u →X 1Σ+g transitions of Cs2 have been accurately measured with the techniques of Fourier transform spectroscopy, Doppler‐free polarization spectroscopy, and optical optical double resonance. The wave numbers of all these rotational lines were determined with an accuracy of 1 to 5×10−3 cm−1. A thorough and simultaneous analysis of all the measured data yields molecular constants, potential energy curves, and dissociation energies for six different excited electronic states of the Cs2 molecule.
Chemical Physics Letters, 1981
ABSTRACT The emission spectrum of NO excited by electric discharge has been recorded with a high-... more ABSTRACT The emission spectrum of NO excited by electric discharge has been recorded with a high-resolution Fourier transform interferometer. Strong perturbations are observed in the spectrum of the transition M2Σ+→ E2Σ+ (0—0), due to mixing of the Rydberg state M2Σ+(v = 0) with valence states B2Π(v = 22, 23) and L2Π(v = 3). Accurate energies for the M2Σ+ rotational levels are given.
Chemical Physics Letters, 1995
ABSTRACT From the published spectra of states of Rb2 that lie within 35 cm−1 of the dissociation ... more ABSTRACT From the published spectra of states of Rb2 that lie within 35 cm−1 of the dissociation limit it has been possible to derive the complete potential energy curves for the lg state (correlated to 1IIg at short intemuclear distance) and for the novel 0g− ‘pure long-range’ state, predicted by ab initio calculations. Reliable values of dissociation limit constants vD and C3 are derived and compared to the predictions of theoretical works.
The Astrophysical Journal Supplement Series, 1983
ABSTRACT Observations and analysis of the (0-0) Swan band of (C-12)2, (C-13)2, and (C-12)(C-13) a... more ABSTRACT Observations and analysis of the (0-0) Swan band of (C-12)2, (C-13)2, and (C-12)(C-13) are described. A Fourier transform interferometer was used for recording the spectra. The observed wavenumbers were reduced to molecular parameters using a nonlinear least squares fitting procedure. Molecular parameters for the (a-3)II(v=0), (d-3)II(v=0), and (b-3)sigma(-) levels are presented, along with observed perturbations in the (d-3)II(v=0) level and energies of perturbed and perturbing levels of the three investigated species.
Journal of Molecular Spectroscopy, 1982
The vibration-rotation emission spectrum of the nitric oxide molecule was recorded with a high-re... more The vibration-rotation emission spectrum of the nitric oxide molecule was recorded with a high-resolution Fourier transform interferometer (resolution 8 × 10-3 cm-1) in the spectral range 3800 to 5000 cm-1. Thirteen vibration-rotation bands of the Deltav = 3 sequence (10-7 to 22-19) were analyzed. Molecular parameters for the ground state X2Pi up to v = 22 are obtained by a
Author Institution: Laboratoire Aim\'e Cotton, B\^at 505This work presents an accurate study ... more Author Institution: Laboratoire Aim\'e Cotton, B\^at 505This work presents an accurate study of the 0−g(P3/2)0^{-}_{g} (P_{3/2})0−g(P3/2) pure long range electronic state of the 87Rb(5S)−87Rb(5P3/2)^{87}Rb(5S)-^{87}Rb(5P_{3/2})87Rb(5S)−87Rb(5P3/2) and 133Cs(6S)−133Cs(6P3/2)^{133}Cs(6S)-^{133}Cs(6P_{3/2})133Cs(6S)−133Cs(6P3/2) molecular systems. Generalized simulated annealing method was used in order to reduce the high resolution spectral data provided by photoassociative spectroscopy of ultra cold 87Rb^{87}Rb87Rb and 133Cs^{133}Cs133Cs atoms. The analysis has allowed the determination of the effective dispersion parameters, the chemical exchange energy contribution as well as the dissociation energy concerning the analytical potential representation of the 0−g(P3/2)0^{-}_{g} (P_{3/2})0−g(P3/2) state for both, Rb2Rb_{2}Rb2 and Cs2Cs_{2}Cs2, molecules. A detailed comparison with the potential curves obtained through RKR procedure is performed, and the consequences for ultracold molecules formation rates are discussed
Journal of Physics B: Atomic and Molecular Physics, 1977
ABSTRACT Twenty-one spectral quasi-coincidences between CO laser lines and NO absorption lines ar... more ABSTRACT Twenty-one spectral quasi-coincidences between CO laser lines and NO absorption lines are given, sixteen of which have never been reported previously. In three cases the discrepancies between the frequencies are smaller than the Doppler width. Lamb-dip spectroscopy should be possible and also stabilisation of the CO laser on a hyperfine component of NO.
Molecular Physics, 1986
ABSTRACT Infrared fluorescence of Rb 2 in the region 4700 to 6500cm -1 , which arises when levels... more ABSTRACT Infrared fluorescence of Rb 2 in the region 4700 to 6500cm -1 , which arises when levels of C 1 Π u state are pumped by the 4765 and 4880 Å lines of an argon-ion laser, has been recorded at high resolution by Fourier transform spectrometry. It is assigned to the system C 1 Π u → 1 1 Π g , and the positions of levels up to ν = 68 in 1 1 Π g have been determined. Constants for the 1 1 Π g state of 85 Rb 2 are as follows: The dissociation energy, D e , for this state is estimated to be 1290 ± 30 cm -1 .
Chem Phys Lett, 1999
Infrared fluorescence of the KRb molecule in the spectral range 6500-8000 cm -1, arising when the... more Infrared fluorescence of the KRb molecule in the spectral range 6500-8000 cm -1, arising when the levels of the (3) 1Pi state are excited by the 457.9, 465.8, 472.7, and 476.5 nm lines of an argon-ion laser, has been recorded by Fourier transform spectrometry. A part of the fluorescence is assigned to the system (3) 1Pi-->(3) 1Sigma+. The (3) 1Sigma+ state energy levels up to v=15 have been determined. The main spectroscopic constants for this state are Te=13995.465 (10) cm -1, omegae=40.76310 (40) cm -1, omegaexe=-0.26988 (71)×10 -1 cm -1, Be=22.8215 (28)×10 -3 cm -1, Re=4.17125 Å. The unusual spacing of the vibrational levels reflects the ionic character of the state. Preliminary values for the strongly perturbed (3) 1Pi state are Te=21762.0, omegae=41.36, omegaexe=0.184, Be=28.82×10 -3 cm -1.
Prehistoire Et Protohistoire En Champagne Ardenne, 2001
Paléo, 1993
Dans cet article on decrit la methode de debitage de l'industrie du gisement de Montsaugeon (... more Dans cet article on decrit la methode de debitage de l'industrie du gisement de Montsaugeon (Haute-Marne). Il s'agit d'un systeme par surface de debitage alterne similaire a celui utilise dans le Clactonien de High-Lodge.
Journal of Molecular Spectroscopy, 2000
High-resolution spectra of the (3)1Pi --> (2)3Sigma+ system of the KRb molecule, obtained ... more High-resolution spectra of the (3)1Pi --> (2)3Sigma+ system of the KRb molecule, obtained after excitation with fixed frequencies Ar+ laser lines, were recorded on a Connes-type Fourier transform interferometer. Molecular constants of the first 14 vibrational levels of the (2)3Sigma+ state are determined. The RKR potential energy curve is derived. The main spectroscopic constants for this triplet electronic state of
Journal of Molecular Spectroscopy, 1986
The Asundi system (a' '2+-a311) of 13C160 has been studied between 3500 and 12 000 cm-' by high-r... more The Asundi system (a' '2+-a311) of 13C160 has been studied between 3500 and 12 000 cm-' by high-resolution Fourier transform spectroscopy. The 10 bands, O-O, O-l, t-0, I-1, l-2, 2-0, 2-1, 3-0,4-O, and 4-2, were analyzed taking into account the strong perturbations appearing in the a' 3Z+ (u = 0,. ,4) levels. Accurate perturbation parameters were obtained for all interacting states. 01 1986 Academic Press, Inc.
Journal of Molecular Spectroscopy, 1991
ABSTRACT Laser induced fluorescence spectra of the A1Σu+ → X1Σg+ system have been recorded by Fou... more ABSTRACT Laser induced fluorescence spectra of the A1Σu+ → X1Σg+ system have been recorded by Fourier transform spectrometry. The ground electronic state of the 39K2 molecule is characterized up to v = 75, encompassing 99.3% of the potential depth. A long-range study of the potential energy curve gave the coefficients of the multipolar expansion and the dissociation energy is found to be De = 4451 ± 1.5 cm−1 (0.5519 ± 0.0002 eV).
Journal of Molecular Spectroscopy, 1976
ABSTRACT
Journal of Molecular Spectroscopy, 1976
The infrared spectrum of 64 bands of the isotopic species 15N216O of nitrous oxide and of 37 band... more The infrared spectrum of 64 bands of the isotopic species 15N216O of nitrous oxide and of 37 bands of 14N218O have been analyzed. The studied spectral range extends from 1750 to 6000 cm-1 for 15N216O and from 1750 to 3100 cm-1 for 14N218O. The effective rotational constants are given for 44 levels of 15N216O comprising 21Sigma, 12Pi, 7Delta, 4Phi levels
The Journal of Chemical Physics, 1990
... Courbe potentiel. ; Constante moléculaire. ; Constante anharmonicité. ; Constante distorsion ... more ... Courbe potentiel. ; Constante moléculaire. ; Constante anharmonicité. ; Constante distorsion centrifuge. ; Constante rotation. ; Energie transition. ; ... Constante moléculaire. ; Constante anharmonicité. ; Constante distorsion centrifuge. ; Constante rotation. ; Energie transition. ; ...
The Journal of Chemical Physics, 1988
ABSTRACT The fluorescence spectra of the two electronic systems (3) 1&Pgr;u↠X 1∑g appeari... more ABSTRACT The fluorescence spectra of the two electronic systems (3) 1&Pgr;u↠X 1∑g appearing in the visible range and (3) 1&Pgr;u↠(2) 1∑g in the near infrared has been observed using an argon ion laser to excite Cs2 molecules. Fluorescence lines were accurately measured with a high resolution Fourier transform interferometer. Accurate molecular constants and potential energy curves have been determined for the (3) 1&Pgr;u electronic state. The main constants are as follows: Te(cm−1) =20 684.669; we(cm−1) =30.398; Be(cm−1) =0.009 12; Re(A˚) =5.2735. Possible correlation with the atomic limit 7 2P1/2+6 2S1/2 yields a dissociation energy De=4730±1 cm−1.
The Journal of Chemical Physics, 1988
ABSTRACT More than 8000 completely resolved rotational lines in the E 1Σ+u →X 1Σ+g, E 1Σ+g →(2)1Σ... more ABSTRACT More than 8000 completely resolved rotational lines in the E 1Σ+u →X 1Σ+g, E 1Σ+g →(2)1Σ+g, E 1Σ+u →(1)1Πg, E 1Σ+u →(3)1Σ+g, D 1Σ+u →(2)1Σ+g, C 1Σu →X 1Σ+g, and D 1Σ+u →X 1Σ+g transitions of Cs2 have been accurately measured with the techniques of Fourier transform spectroscopy, Doppler‐free polarization spectroscopy, and optical optical double resonance. The wave numbers of all these rotational lines were determined with an accuracy of 1 to 5×10−3 cm−1. A thorough and simultaneous analysis of all the measured data yields molecular constants, potential energy curves, and dissociation energies for six different excited electronic states of the Cs2 molecule.
Chemical Physics Letters, 1981
ABSTRACT The emission spectrum of NO excited by electric discharge has been recorded with a high-... more ABSTRACT The emission spectrum of NO excited by electric discharge has been recorded with a high-resolution Fourier transform interferometer. Strong perturbations are observed in the spectrum of the transition M2Σ+→ E2Σ+ (0—0), due to mixing of the Rydberg state M2Σ+(v = 0) with valence states B2Π(v = 22, 23) and L2Π(v = 3). Accurate energies for the M2Σ+ rotational levels are given.
Chemical Physics Letters, 1995
ABSTRACT From the published spectra of states of Rb2 that lie within 35 cm−1 of the dissociation ... more ABSTRACT From the published spectra of states of Rb2 that lie within 35 cm−1 of the dissociation limit it has been possible to derive the complete potential energy curves for the lg state (correlated to 1IIg at short intemuclear distance) and for the novel 0g− ‘pure long-range’ state, predicted by ab initio calculations. Reliable values of dissociation limit constants vD and C3 are derived and compared to the predictions of theoretical works.
The Astrophysical Journal Supplement Series, 1983
ABSTRACT Observations and analysis of the (0-0) Swan band of (C-12)2, (C-13)2, and (C-12)(C-13) a... more ABSTRACT Observations and analysis of the (0-0) Swan band of (C-12)2, (C-13)2, and (C-12)(C-13) are described. A Fourier transform interferometer was used for recording the spectra. The observed wavenumbers were reduced to molecular parameters using a nonlinear least squares fitting procedure. Molecular parameters for the (a-3)II(v=0), (d-3)II(v=0), and (b-3)sigma(-) levels are presented, along with observed perturbations in the (d-3)II(v=0) level and energies of perturbed and perturbing levels of the three investigated species.
Journal of Molecular Spectroscopy, 1982
The vibration-rotation emission spectrum of the nitric oxide molecule was recorded with a high-re... more The vibration-rotation emission spectrum of the nitric oxide molecule was recorded with a high-resolution Fourier transform interferometer (resolution 8 × 10-3 cm-1) in the spectral range 3800 to 5000 cm-1. Thirteen vibration-rotation bands of the Deltav = 3 sequence (10-7 to 22-19) were analyzed. Molecular parameters for the ground state X2Pi up to v = 22 are obtained by a
Author Institution: Laboratoire Aim\'e Cotton, B\^at 505This work presents an accurate study ... more Author Institution: Laboratoire Aim\'e Cotton, B\^at 505This work presents an accurate study of the 0−g(P3/2)0^{-}_{g} (P_{3/2})0−g(P3/2) pure long range electronic state of the 87Rb(5S)−87Rb(5P3/2)^{87}Rb(5S)-^{87}Rb(5P_{3/2})87Rb(5S)−87Rb(5P3/2) and 133Cs(6S)−133Cs(6P3/2)^{133}Cs(6S)-^{133}Cs(6P_{3/2})133Cs(6S)−133Cs(6P3/2) molecular systems. Generalized simulated annealing method was used in order to reduce the high resolution spectral data provided by photoassociative spectroscopy of ultra cold 87Rb^{87}Rb87Rb and 133Cs^{133}Cs133Cs atoms. The analysis has allowed the determination of the effective dispersion parameters, the chemical exchange energy contribution as well as the dissociation energy concerning the analytical potential representation of the 0−g(P3/2)0^{-}_{g} (P_{3/2})0−g(P3/2) state for both, Rb2Rb_{2}Rb2 and Cs2Cs_{2}Cs2, molecules. A detailed comparison with the potential curves obtained through RKR procedure is performed, and the consequences for ultracold molecules formation rates are discussed