1,721,067 research outputs found
Infrared Optoacoustic Spectroscopy Of 13cd3od Around 9p Co2 Laser Lines
No full textIn this work we present the results of an investigation about Doppler limited infrared absorbing transitions of the in-plane methyl-rocking and the asymmetric methyl deformation modes of 13CD3OD by means of optoacoustic detection. This is an alternative and attractive technique to be applied to this methanol isotopromer, in comparison to Fourier transform spectroscopy. In fact the contamination problem associated with the fast exchange of OD by OH in the molecule limits the use of the Fourier transform technique. Using a waveguide CO2 laser of 290 MHz tunability on each line we were able to observe 20 IR absorptions, most of them of large offset. The data will be useful in theoretical analysis of this molecule, as well as in the generation of FIR laser radiation in optically pumped molecular laser.214621632Borden, A., Baker, F.E., (1939) J.Chem Phys., 6, p. 553Koehler, J.S., Dennison, D.M., (1940) Phys. Rev., 57, p. 1006Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. of Infrared and Millimeter Waves, 15 (1), p. 1Moruzzi, G., Moraes, J.C.S., Strumia, F., (1992) Int. J. of Infrared and Millimeter Waves, 13 (9), p. 1269Henkel, C., Jacq, T., Nuersberger, R., Menten, K.M., Steppe, H., (1987) Astron. Astrophys., 188 (1), pp. L1Sutton, E.C., Herbst, E., (1988) Astrophys. J., 333 (1), p. 359Moruzzi, G., Strumia, F., Carnesecchi, P., Mukhopadyay, I., Lees, R.M., Johns, J.W.C., (1989) Infrared Phys., 29 (2), p. 583Moruzzi, G., Riminucchi, P., Strumia, F., Carli, B., Carlotti, M., Lees, R.M., Mukhopadyay, I., Winnewisser, M., (1990) J.Mol. Spectrosc., 144 (1), p. 139Moraes, J.C.S., Scalabrin, A., Pereira, D., Dilonardo, G., Fusina, L., (1991) Infrared Phys., 31 (4), p. 365Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, Strumia, F., (1992) Appl. Phys. B, 54 (1), p. 24Mukhopadyay, I., Lees, R.M., Llewis-Bevan, W., Johns, J.W., (1995) J. Chem. Phys., 102 (16), p. 6444Moraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewisser, M., Gupta, P.K., (1995) J. Mol. Spectrosc., 174 (1), p. 177Moraes, J.C.S., Carelli, G., Moretti, A., Moruzzi, G., Strumia, F., (1996) J.Mol. Spectrosc. J. Mol. Spectrosc., 177 (2), p. 302Carelli, G., Ioli, N., Moretti, A., Moruzzi, G., Strumia, F., Zhao, S., Lees, R.M., Goulding, R.R., (1995) Infrared Phys.Tech., 35 (6), p. 743Carelli, G., Moretti, A., Strumia, F., Zhao, S., Lees, R.M., (1996) J. Mol. Spectrosc., 177 (1), p. 79Cruz, F.C., Scalabrin, A., Pereira, D., Vazquez, P.A.M., Hase, Y., Strumia, F., (1992) J. Mol. Spectrosc., 156 (1), p. 22Viscovini, R.C., Scalabrin, A., Pereira, D., (1996) Int. J. of Infrared and Millimeter Waves, 17 (11), p. 1821Carelli, G., Ioli, N., Messina, A., Moretti, A., Strumia, F., Telles, E.M., Moraes, J.C.S., Pereira, D., (1991) Infrared Phys., 31 (4), p. 323Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, A., Strumia, F., (1994) IEEE J. Quantum Electron, QE30 (12), p. 2946Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1992) Int. J. Infrared and Millimeter Waves, 13 (11), p. 1801Viscovini, R.C., Scalabrin, A., Pereira, D., (1997) IEEE J. Quantum Electron, QE33 (6), p. 916Viscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., (1997) Appl. Phys. B, 65 (1), p. 33Viscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., (1999) IEEE J. Quantum Electron, QE35 (11), p. 1613Viscovini, R.C., Cruz, F.C., Moraes, J.C.S., Scalabrin, A., Pereira, D., (1999) Int. J. Infrared and Millimeter Waves, 20 (2), p. 193Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., (1991) Appl. Phys. B, 52 (1), p. 36Pereira, D., Scalabrin, A., (1992) Infrared Phys., 33 (6), p. 549Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1987) Appl. Phys. B, 44 (2), p. 11
Vibrational And Rotational Spectroscopy Of 13cd3od
No full textWe have used Fourier Transform spectral data on the C-O stretching mode of 13CD3OD in order to perform a vibro-rotational analysis for this molecule. We have estimated a few molecular parameters of the ground and C-O stretching vibrational modes. Based on these parameters, and by using the Kwan-Dennison model, we propose assignments for a number of far-infrared laser transitions of 13CD3OD.202193201Moruzzi, G., Winnewisser, B.P., Winnewiesser, M., Mukhopadhyay, I., Strumia, F., (1995) Microwave - Infrared and Laser Transistions of Methanol., , CRC Press, IncMoraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewiesser, M., Gupta, P.K., (1995) J. Mol. Spectrosc., 174, p. 177Lees, R.M., Mukhopadhyay, I., Predoi, A., Lewisbevan, W., Johns, J.W.C., (1996) J. Chem. Phys., 105, p. 3406Xu, L.-H., (1994) J. Mol. Spectrosc., 164, p. 287Xu, L.-H., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., Moruzzi, G., (1993) J. Mol. Spectrosc., 157, p. 447Kwan, Y.Y., Dennison, D.M., (1972) J. Mol. Spectrosc., 43, p. 291Moruzzi, G., Xu, L.-H., Lees, R.M., Winnewisser, B.P., Winnewiesser, M., (1994) J. Mol. Spectrosc., 167, p. 156Viscovini, R.C., Scalabrin, A., Pereira, D., (1996) Int. J. Infrared Millimeter Waves, 17, p. 1821Cruz, F.C., Scalabrin, A., Pereira, D., Vazquez, P.A.M., Hase, Y., Strumia, F., (1992) J. Mol. Spectrosc., 156, p. 22Mukhopadhyay, I., (1997) Spectroc. Acta A, 53, p. 979Jackson, M., Sudhakaran, G.R., Gansen, E., (1996) J. Mol. Spectrosc., 176, p. 439Moraes, J.C.S., Scalabrin, A., Pereira, D., Di Leonardo, G., Fusina, L., (1991) Infr. Phys., 31, p. 365Walker, S., Straw, H., (1970) Spectroscopy, , Chapman & Hall, LondonLees, R.M., Baker, J.G., (1968) J. Chem. Phys., 48, p. 5299Lees, R.M., (1972) J. Chem. Phys., 56, p. 5887Viscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., (1997) Appl. Phys. B, 65, p. 33Viscovini, R.C., Scalabrin, A., Pereira, D., (1997) IEEE J. Quantum Electron., 33, p. 91
Infrared Optoacoustic Spectroscopy Of 13cd3od Around The 10r And 10p Co2 Laser Lines
No full textIn this work we present the results of an investigation about Doppler limited infrared absorbing transitions of the C-O stretching vibrational mode of 13CD3OD by means of optoacoustic detection. This technique is an alternative, more sensitive and of higher resolution than the Fourier transform spectroscopy which is applied to this methanol isotopomer, due to the contamination problem associated with the fast exchange of OD by OH in the molecule. Using a waveguide CO2 laser of 290 MHz tunability on each line we were able to observe 69 absorptions, most of then of large offset. The data will be useful in theoretical analysis of this sample, as well as a guide in the search for new FIR laser lines. © 1996 Plenum Publishing Corporation.171118211838Borden, A., Baker, F.E., (1939) J.Chem Phys., 6, p. 553Koehler, J.S., Dennison, D.M., (1940) Phys. Rev., 57, p. 1006Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. of Infrared and Millimeter Waves, 15 (1), p. 1Moruzzi, G., Moraes, J.C.S., Strumia, F., (1992) Int. J. of Infrared and Millimeter Waves, 13 (9), p. 1269Henkel, C., Jacq, T., Nuersberger, R., Menten, K.M., Steppe, H., (1987) Astron. Astrophys., 188, pp. L1Sutton, E.C., Herbst, E., (1988) Astrophys. J., 333, p. 359Moruzzi, G., Strumia, F., Carnesecchi, P., Mukhopadyay, I., Lees, R.M., Johns, J.W.C., (1989) Infrared Phys., 29 (2), p. 583Moruzzi, G., Riminucchi, P., Strumia, F., Carli, B., Carlotti, M., Lees, R.M., Mukhopadyay, I., Winnewisser, M., (1990) J.Mol. Spectrosc., 144, p. 139Moraes, J.C.S., Scalabrin, A., Pereira, D., DiLonardo, G., Fusina, L., (1991) Infrared Phys., 31 (4), p. 365Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, Strumia, F., (1992) Appl. Phys. B, 54, p. 24(1992) Infrared Phys., 33 (2), p. 133Mukhopadyay, I., Lees, R.M., Llewis-Bevan, W., Johns, J.W., (1995) J. Chem. Phys., 102, p. 6444Moraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewisser, M., Gupta, P.K., (1995) J. Mol. Spectrosc., 174, p. 177Moraes, J.C.S., Carelli, G., Moretti, A., Moruzzi, G., Strumia, F., J.Mol. Spectrosc., , in pressCarelli, G., Ioli, N., Moretti, A., Moruzzi, G., Strumia, F., Zhao, S., Lees, R.M., Goulding, R.R., (1995) Infrared Phys.Tech., 35, p. 743Carelli, G., Moretti, A., Strumia, F., Zhao, S., Lees, R.M., (1996) J. Mol. Spectrosc., 177, p. 79Cruz, F.C., Scalabrin, A., Pereira, D., Vazquez, P.A.M., Hase, Y., Strumia, F., (1992) J. Mol. Spectrosc., 156, p. 22Carelli, G., Ioli, N., Messina, A., Moretti, A., Strumia, F., Telles, E.M., Moraes, J.C.S., Pereira, D., (1991) Infrared Phys., 31 (4), p. 323Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, A., Strumia, F., (1994) IEEE J. Quantum Electron., QE30 (12), p. 2946Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1992) Int. J. Infrared and Millimeter Waves, 13 (11), p. 1801Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., (1991) Appl. Phys. B, 52, p. 36Pereira, D., Scalabrin, A., (1992) Infrared Phys., 33 (6), p. 549Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1987) Appl. Phys. B, 44, p. 11
Large Offset Far Infrared Laser Lines Generation From The C-o Stretching Q-branch Of 13cd3od
No full textUsing for the first time a waveguide CO2 laser of wide tunability to pump 13CD3OD we could observe 10 new far infrared laser lines ranging from 109 μm to 472 μm. The lines were generated by pumping infrared absorbing transitions of large offset appertaining to the C-O stretching Q-branch. All lines were characterised in wavelength, polarisation, optimum pressure of operation and precise offset measurements. © Springer-Verlag 1997.6513335Moruzzi, G., Strumia, F., Carnesecchi, P., Lees, R.M., Mukhopadyay, I., Johns, J.W., (1989) Infrared Phys., 29 (2), p. 583Moraes, J.C.S., Scalabrin, A., Pereira, D., Di Lonardo, O., Fusina, L., (1991) Infrared Phys., 31 (4), p. 365Mukhopadyay, I., Lees, R.M., Lewis-Bevan, W., Johns, J.W., (1995) J. Chem. Phys., 102, p. 6444Zhao, S., (1993), Ph.D Thesis- University of New BranswickZhao, S., Lees, R.M., (1994) J. Mol. Spectrosc., 163, p. 67Moruzzi, G., Moraes, J.C.S., Strumia, F., (1992) Int. J. Infrared and Millimeter Waves, 13 (9), p. 1269Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, A., (1994) Int. J. Infrared and Millimeter Waves, 15 (1), p. 1Zerbetto, S.C., Vasconcellos, B.C.C., (1994) Int. J. Infrared and Millimeter Waves, 15 (4), p. 889Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1987) Appl. Phys. B, 44, p. 111Ioli, N., Moretti, A., Pereira, D., Strumia, F., Carelli, G., (1989) Appl. Phys. B, 48, p. 299Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., (1991) Appl. B, 52, p. 36Carelli, G., Ioli, N., Moretti, A., Moruzzi, G., Strumia, F., Pereira, D., (1991) Int. J. Infrared and Millimeter Waves, 12 (5), p. 449Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, A., Strumia, F., (1992) Infrared Phys., 33 (2), p. 133Cruz, F.C., Scalabrin, A., Pereira, D., Vazquez, P.M., Hase, Y., Strumia, F., (1992) J. Mol. Spectrosc., 156, p. 22Vasconcellos, E.C.C., Evenson, K.M., (1985) Int. J. Infrared and Millimeter Waves, 6 (11), p. 1157Vasconcellos, E.C., Zerbetto, S.C., Zink, L.R., Evenson, K.M., (1996) Proc. of the 5 Ith State University Int. Symposium on Mol. Spectrosc.Telles, E.M., Scalabrin, A., Pereira, D., (1995) IEEE J. Quantum Electron., 31 (4), p. 754Viscovini, R.C., Scalabrin, A., Pereira, D., (1996) Int. J. Infrared and Millimeter Waves, 17 (11), p. 1821Inguscio, M., Moretti, A., Strumia, F., (1979) Opt. Comm., 30, p. 35
13cd3od Optically Pumped By A Waveguide Co2 Laser: New Fir Laser Lines
No full textA waveguide CO2 laser of wide tunability was used to pump infrared transitions of the 13CD3OD C-O stretching vibrational mode. The optoacoustic signal associated with the absorbing transitions served as a guide to search for new laser lines. We could observe 36 new far-infrared laser lines ranging from 57 to 1192 μm. All lines were characterized in wavelength, relative polarization, intensity, optimum pressure of operation, and precise offset measurements.336916918Moruzzi, G., Moraes, J.C.S., Strumia, F., Far-infrared laser lines and assignments of CH3OH - A review (1992) Int. J. Infrared Millimeter Waves, 13 (9), pp. 1269-1312Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., A review of optically pumped far-infrared laser lines from methanol isotopes (1994) Int. Infrared Millimeter Waves, 15 (1), pp. 1-44Zerbetto, S.C., Vasconcellos, E.C.C., Far-infrared laser lines produced by methanol and its isotopic-species (1994) Int. J. Infrared Millimeter Waves, 15 (5), pp. 889-899Carelli, G., Ioll, N., Moretti, A., Pereira, D., Strumia, F., New large far-infrared laser lines from CD3OH (1987) Appl. Phys. B, 44 (2), pp. 111-117Ioli, N., Moretti, A., Pereira, D., Strumia, F., Carelli, G., A new efficient far-infrared optically pumped laser gas - CH3 18OH (1989) Appl. Phys. B, 48 (4), pp. 299-304Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., New FIR laser lines from CD3OD optically pumped by a CO2 wave-guide laser (1991) Appl. Phys. B, 52 (1), pp. 36-41Carelli, G., Ioli, N., Moretti, A., Moruzzi, G., Strumia, F., Pereira, D., Acousto-optic extension of the frequency tunability of cw CO2-lasers - New FIR Lasers emissions from CH3OH and 13CH3OH (1991) Int. J. Infrared Millimeter Waves, 12 (5), pp. 449-471Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Moretti, A., Strumia, F., Spectroscopy of the excited C-O stretching Q-branch of 13CD3OH - Measurement and assignment of new FIR laser lines (1992) Infrared Phys., 33 (2), pp. 133-139Viscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., Large offset far-infrared laser lines generation from the C-O stretching Q-branch of 13CD3OD Appl. Phys. B, , to be publishedVasconcellos, E.C.C., Evenson, K.M., New far-infrared lines obtained by optically pumping 13CD3OD (1985) Int. J. Infrared Millimeter Waves, 6 (11), pp. 1157-1167Vasconcellos, E.C.C., Zerbetto, S.C., Zink, L.R., Evenson, K.M., New laser lines and frequency measurements of fully deuterated isotopomers of methanol (1996) Proc. 51th Ohio Stale University Symp. Mol. Spectroscopy, , JuneTelles, E.M., Scalabrin, A., Pereira, D., Frequency measurements of optically pumped far-infrared laser lines (1995) IEEE J. Quantum Electron., 31 (4), pp. 754-757Viscovini, R.C., Scalabrin, A., Pereira, D., Infrared optoacoustic spectroscopy of "CD3OD around the 10R and 10P laser lines Int. J. Infrared Millimeter Waves, , submitted for publicationInguscio, M., Moretti, A., Strumia, F., IR-FIR transferred lambdip spectroscopy in optically pumped molecular lasers (1979) Opt. Commun., 30 (3), p. 35
Gas Phase Infrared Fourier Transform Spectra Of H12cooh And H13cooh
No full textFormic acid and its isotopic species are important molecules for which several theoretical and experimental spectroscopic studies were performed. The rotational spectra of the fundamental vibrational modes of these molecules were reported, as well as the infrared spectra of the main monomer and its deuterium derivatives. On the other hand there are almost no available infrared data for the 13C species. In this work we present the gas phase Fourier transform (FT) spectra of H12COOH and H13COOH in the 450 cm-1 to 5000 cm-1 region, The spectra were obtained using a Bomem DA-8 spectrometer at 3.0 cm-1, 0.1 cm-1, and 0.03 cm-1 resolution. All the vibrational modes are identified and the vibrational frequencies are used to apply the product rule.3814549Hisatsune, I.C., Heicklein, J., (1973) Can. J. Spectrosc., 18, p. 135Redington, R.L., (1977) J. Mol. Spectrosc., 65, p. 171Willemot, E., Dangoisse, D., Bellet, J., (1978) J. Mol. Spectrosc., 73, p. 96(1979) J. Mol. Spectrosc., 77, p. 161Willemot, E., Dangoisse, D., Monnantemil, N., Bellet, J., (1980) J. Chem. Phys. Ref. Data, 9, p. 59Zuckerman, B., Bell, J.A., Gottlieb, A., (1971) Astrophys. J., 163, p. 141Dangoisse, D., Glorieux, P., (1984) Reviews of Infrared and Millimeter Waves, 2, p. 429. , K.J. Button (Ed), Plenum Press, and references thereinWoodward, L.A., (1972) Introduction to the Theory of Molecular Vibrations and Vibrational Spectroscopy, , Oxford Univ. PressTelles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., (1991) Appl. Phys. B, 52, p. 36Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., (1992) Appl. Phys. B, 54, p. 24Luis, G.R.M.S., Telles, E.M., Scalabrin, A., Pereira, D., IEEE J. Quantum Electron., , to be submittedRedington, R.L., (1978) J. Mol. Spectrosc., 65, p. 17
Characterization Of New Fir Laser Lines From Cd3-rocking And Asymmetric Cd3 Deformation Modes Of 13cd3od
No full textIn this paper, we report new optically pumped far-infrared (FIR) laser lines from the in-plane CD3-rocking and asymmetric CD3 deformation absorption vibrational bands of 13CD3OD. A waveguide CO2 laser of wide tunability (290 MHz) was used as the pump source, and a Fabry-Perot open cavity as the FIR laser resonator. Optoacoustic absorption spectrum was used as a guide to search for new FIR laser lines. We could observe 14 new laser lines in the range 103-491 μm. The lines were characterized according to wavelength, relative polarization, relative intensity, and optimum working pressure. The transferred lamb-dip technique was used to measure the frequency absorption transition for both new and previously reported laser lines.351116131615Moruzzi, G., Moraes, J.C.S., Strumia, F., Far-infrared laser lines and assignments of CH3OH - A review (1992) Int. J. Infrared Millimeter Waves, 13 (9), pp. 1269-1312Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., A review of optically pumped far-infrared laser lines from methanol isotopes (1994) Int. J. Infrared Millimeter Waves, 15 (1), pp. 1-44Zerbetto, S.C., Vasconcellos, E.C.C., Far-infrared laser lines produced by methanol and its isotopic-species - A review (1994) Int. J. Infrared Millimeter Waves, 15 (5), pp. 889-899Henningsen, J.O., Methanol laser lines from torsionally excited CO stretchstates, and from OH-bend, CH3-rock, and CH3-deformation states (1986) Int. J. Infrared Millimeter Waves, 7 (10), pp. 1605-1629Mukhopadhyay, I., Lees, R.M., Johns, J.W.C., Confirmation of far-infrared laser assignments from CH3-deformation and CH3-rocking states of optically pumped methanol (1988) Appl. Phys. B, 47 (4), pp. 319-324Cruz, F.C., Scalabrin, A., Pereira, D., Vazquez, P.A.M., Hase, Y., Strumia, F., The infrared absorption spectra and normal coordinate analysis of 13CH3OH, 13CD3OH and 13CD3OD (1992) J. Mol. Spectrosc., 156 (1), pp. 22-38Predoi, A., Lees, R.M., Xu, L.H., Far-infrared laser assignments and predictions for CO-stretching and CH3-rocking states of optically pumped 13CH3OH (1996) Infrared Phys. Technol., 37 (3), pp. 351-366Viscovini, R.C., Scalabrin, A., Pereira, D., 13CD3OD optically pumped by a waveguide CO2 laser: New FIR laser lines (1997) IEEE J. Quantum Electron., 33, pp. 916-918. , JuneViscovini, R.C., Telles, E.M., Scalabrin, A., Pereira, D., Large offset far-infrared laser lines generation from the C-O stretching Q-branch of 13CD3OD (1997) Appl. Phys. B, 65 (1), pp. 33-35Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Moretti, A., Strumia, F., New FIR laser lines from CD3OD optically pumped by a CO2 waveguide laser (1991) Appl. Phys. B, 52 (1), pp. 36-41Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., New large offset far-infrared laser lines from CD3OH (1987) Appl. Phys. B, 44 (2), pp. 111-117Viscovini, R.C., Scalabrin, Pereira, D., Infrared optoacoustic spectroscopy of 13CD3OD around the 10R and 10P CO2 laser lines (1996) Int. J. Infrared Millimeter Waves, 17 (11), pp. 1821-1838Inguscio, M., Moretti, A., Strumia, F., IR-FIR transferred lamb-dip spectroscopy in optically pumped molecular lasers (1979) Opt. Commun., 30 (3), p. 355Vasconcellos, E.C.C., Evenson, K.M., New far infrared laser lines obtained by optically pumping 13CD3OD (1985) Int. J. Infrared Millimeter Waves, 6 (11), pp. 1157-116
Saturation Measurements Of The A 3p0-y 3do 1 Ti I Transition By Optogalvanic Spectroscopy
No full textThe optogalvanic signal (OGS) induced in a Ti-Ar hollow-cathode discharge, stimulated by modulated cw laser light tuned to the a 3P0-y 3Do 1 Ti I transition, was measured as a function of the light intensity. By solving analytically the rate equations of a three-level system, which include the Ti I ground state, the lower metastable a 3P0 and the upper y 3Do 1 levels, an expression was obtained that relates the magnitude of the OGS to the laser intensity and the saturation parameter (1/σ0τ). The σ0τ product was determined by fitting the theoretical curve to the experimental data. © 1998 Elsevier Science B.V. All rights reserved.1534-6231234Mirage, A., Pereira, D., Cruz, F.C., Scalabrin A. II, (1992) Nuovo Cimento, 14 D, p. 605Barbieri, B., Beverini, N., Sasso, A., (1990) Rev. Mod. Phys., 70, p. 603Keller, R.A., Zalewski, E.F., (1980) Appl. Optics, 19, p. 3301Drèze, C., Demers, Y., Gagné, J.M., (1982) J. Opt. Soc. Am., 72, p. 912Kopeika, N.S., (1982) Appl. Optics, 21, p. 3989Siegman, A.E., (1986) Lasers, , University Science Books, Mill Valley, Chap. 4Erez, G., Lavi, S., Miron, E., (1979) IEEE J. Quantum Electron., 15, p. 1328Salih, S., Lawler, J.E., (1990) Astron. Astrophys., 239, p. 407Blackwell, D.E., Menon, S.L.R., Petford, A.D., (1983) Mon. Not. R. Astron. Soc., 204, p. 883Mitchell, A.C.G., Zemansky, M.W., (1961) Resonance Radiation and Excited Atoms, , Cambridge University Press, Chap. IIICruz, F.C., Mirage, A., Gomide, J.V.B., Scalabrin, A., Pereira, D., (1994) Optics Comm., 106, p. 5
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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