29 research outputs found

    The Glass Transition Temperature in Dental Composites

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    Diode Laser And Fourier Transform Spectroscopy Of The 13ch3 Oh C-o Stretching Mode

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    In this work we present high resolution Doppler limited absorption spectra measurements of the C-O stretching mode of 13CH3OH, obtained from diode laser spectroscopy, and the Fourier Transform spectrum obtained at 0.12 cm-1 resolution. By using these data and previously known spectroscopic information, we determined the frequency and the J quantum number for the multiplets of the P and R(J) branches of the C-O stretching fundamental band. Infrared transitions in coincidence with emission lines of the regular CO2 laser and some of its isotope parents are pointed out.15241742

    Investigation of 13CH3OH methanol: new laser lines and assignments

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    Dcood Optically Pumped By A13co2 Laser: New Terahertz Laser Lines

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    In this work, we report new optically pumped terahertz laser lines from DCOOD. An isotopic 13CO2 laser was used for first time as pump source, and a Fabry-Perot open cavity was used as a terahertz laser resonator. Optoacoustic absorption spectra were used as a guide to search for new terahertz laser lines. We could observe six new laser lines in the range from 303.8μm (0.987 THz) to 725.1μm (0.413 THz). 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 both for this laser lines. © 2008 American Institute of Physics.99248949

    Ch3oh Optically Pumped By A 13co2 Laser: New Laser Lines And Assignments

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    We report 12 new THz (far-infrared) laser lines from methanol (CH 3OH), ranging from 58.1 μm (5.2 THz) to 624.6 μm (0.5 THz). A 13CO2 laser of wide tunability (110 MHz) has been used for optical pumping, allowing access to previously unexplored spectral regions. Optoacoustic absorption spectra were used as a guide to search for new THz laser lines, which have been characterized in wavelength, polarization, offset, relative intensity, and optimum operation pressure. For 20 laser lines previously observed, we have measured the absorption offset with respect to the 13CO2 laser line center. © Springer-Verlag 2007.864703706Gregory, I.S., Baker, C., Tribe, W.R., Bradley, I.V., Evans, M.J., Linfield, E.H., Davies, A.G., Missous, M., (2005) IEEE J. Quantum Electron, QE-41, p. 717Ostmann, T.K., Knobloch, P., Koch, M., Hoffmann, S., Breede, M., Hofmann, M., Hein, G., Donhuijsen, K., (2001) Electron. Lett, 37, p. 1461Walther, M., Plochocka, P., Fischer, B., Helm, H., Jepsen, P.U., (2002) Biopolymers, 67, p. 310Yuan, T., Xu, J.Z., Zhang, X.C., (2004) Infrared Phys, 45, p. 417Button, K.J., Inguscio, M., Strumia, F., (1984) Optically Pumped Far-Infrared Lasers, pp. 105-192. , Plenum Press, New YorkD. Pereira, J.C.S. Moraes, E.M. Telles, A. Scalabrin, F. Strumia, A. Moretti, G. Carelli, C.A. Massa, Int. J. Infrared Milli. 15, 1 (1994)S.C. Zerbetto, E.C.C. Vasconcellos, Int. J. Infrared Milli. 15, 889 (1994)Tang, F., Henningsen, J.O., (1986) IEEE J. Quantum Electron, QE-22, p. 2084E.M. Telles, L.R. Zink, K.M. Evenson, Int. J. Infrared Milli. 20, 741 (1999)Petersen, J.C., Duxbury, G., (1982) Appl. Phys. B, 27, p. 19Petersen, J.C., Duxbury, G., (1984) Appl. Phys. B, 34, p. 17D. Pereira, A. Scalabrin, G.P. Galvo, K.M. Evenson, Int. J. Infrared Milli. 13, 497 (1992)Moruzzi, G., Winnewisser, B.P., Winnewisser, M., Mukhopadhyay, I., Strumia, F., (1995) Microwave, Infrared and Laser Transitions of Methanol, pp. 7-52. , CRC Press, Boca RatonCosta, L.F.L., Cruz, F.C., Moraes, J.C.S., Pereira, D., (2004) IEEE J. Quantum Electron, QE-40, p. 946Viscovini, R.C., Cruz, F.C., Pereira, D., (2005) IEEE J. Quantum Electron, QE-41, p. 694R.C. Viscovini, A. Scalabrin, D. Pereira, Int. J. Infrared Milli. 17, 1821 (1996)Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1987) Appl. Phys. B, 44, p. 111Inguscio, M., Moretti, A., Strumia, F., (1979) Opt. Commun, 30, p. 355Moruzzi, G., Strumia, F., Carnesecchi, P., Carli, B., Carlotti, M., (1989) Infrared Phys, 29, p. 47Moruzzi, G., Riminucci, P., Strumia, F., Carli, B., Carlotti, M., Lees, R.M., Mukhopadhyay, I., Winnewisser, M., (1990) J. Mol. Spectrosc, 144, p. 139Moruzzi, G., Strumia, F., Carnesecchi, P., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., (1989) Infrared Phys, 29, p. 583Moruzzi, G., Strumia, F., Moraes, J.C.S., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., Winnewisser, B.P., Winnewisser, M., (1992) J. Mol. Spectrosc, 153, p. 511Ioli, N., Moruzzi, G., Riminucci, P., Strumia, F., Moraes, J.C.S., Winnewisser, B.P., Winnewisser, M., (1995) J. Mol. Spectrosc, 171, p. 130Moraes, 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. 177Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., (1985) Opt. Commun, 55, p. 127Mukhopadyay, I., Lees, R.M., Johns, J.W.C., (1987) IEEE J. Quantum Electron, QE-23, p. 137

    Infrared And Far-infrared Spectroscopy Of 13ch3oh: Terahertz Laser Lines And Assignments

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    We use a 13CO2 laser as optical pumping source to search for new THz laser lines generated from 13CH3OH. Nineteen new THz laser lines (also identified as far-infrared, FIR) ranging from 42.3 μm (7.1 THz) to 717.7 μm (0.42 THz) are reported. They are characterized in wavelength, offset, relative polarization, relative intensity, and optimum working pressure. We have assigned eight laser lines to specific rotational energy levels in the excited state associated with the C-O stretching mode. © 2006 Elsevier Inc. All rights reserved.2412151154Chang, T.Y., Bridges, T.J., Burkhardt, E.G., (1970) Appl. Phys. Lett., 17, pp. 249-251Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. Infrared Millim. Waves, 15, pp. 1-44Zerbetto, S.C., Vasconcellos, E.C.C., (1994) Int. J. Infrared Millim. Waves, 15, pp. 889-899Costa, L.F.L., Cruz, F.C., Moraes, J.C.S., Pereira, D., (2004) IEEE J. Quantum Eletron., 40, pp. 946-948Viscovini, R.C., Cruz, F.C., Pereira, D., (2005) IEEE J. Quantum Electron., 41, pp. 694-696Ioli, N., Moruzzi, G., Strumia, F., (1980) Lett. Nuovo Cimento, 28, p. 257Strumia, F., Ioli, N., Moretti, A., (1985) NATO ASI Series, 132. , Abraham N.B., Arecchi F.T., Mooradian A., and Sona A. (Eds), Plenum Press, New YorkCarelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., (1991) Int. J. Infrared Millim. Waves, 12, pp. 557-571Michele, A., Carelli, G., Moretti, A., Strumia, F., Pereira, D., (2004) J. Phys. B: At. Mol. Opt., 37, pp. 1979-1984Petersen, J.C., Duxbury, G., (1982) Appl. Phys. B, 27, pp. 19-25Petersen, J.C., Duxbury, G., (1984) Appl. Phys., B34, pp. 17-21Pereira, D., Scalabrin, A., Galvão, G.P., Evenson, K.M., (1992) Int. J. Infrared and Millim. Waves, 13, pp. 497-506Arnone, D.D., Ciesla, C.M., Pepper, M., (2000) Phys. World, 13, p. 35Walther, M., Fischer, B., Schall, M., Helm, H., Jepsen, P.U., (2000) Chem. Phys. Lett., 332, pp. 389-395Moruzzi, G., Winnewisser, B.P., Winnewisser, M., Mukhopadhyay, I., Strumia, F., (1995) Microwave, Infrared and Laser Transitions of Methanol, , CRC Press, New YorkInguscio, M., Moretti, A., Strumia, F., (1979) Opt. Commun., 30, pp. 355-360Henningsen, J.O., Molecular spectroscopy by far infrared laser emission (1982) Infrared and Millimeter Waves, 5, pp. 29-128. , Button K.J. (Ed), Academic Press, New YorkMoruzzi, G., Xu, L.H., Lees, R.M., Winnewisser, B.P., Winnewisser, M., (1994) J. Mol. Spectrosc., 167, pp. 156-175Moraes, J.C.S., Pereira, D., Scalabrin, A., Moruzzi, G., Strumia, F., Winnewisser, B.P., Winnewisser, M., Gupta, P.K., (1995) J. Mol. Spectrosc., 174, pp. 177-195Moraes, J.C.S., Moruzzi, G., Strumia, F., Winnewisser, B.P., (2005) J. Mol. Spectrosc., 234, pp. 25-33Michele, A., Carelli, G., Moretti, A., Moruzzi, G., (2006) Appl. Phys. B, 83, pp. 495-497Xu, L.H., Moruzzi, G., (2000) J. Mol. Spectrosc., 204, pp. 48-54Moraes, J.C.S., Carelli, G., Moretti, A., Moruzzi, G., Strumia, F., (1996) J. Mol. Spectrosc., 177, pp. 302-30

    Assignment And Frequency Measurement Of Rotational Transitions Of 13cd3oh By Intracavity Laser Stark Spectroscopy

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    We present the results of an intracavity Stark spectroscopy experiment on the fundamental state of 13CD3OH. We use an optically pumped hybrid waveguide FIR laser, CH2F2 as active molecule, and 13CD3OH as absorbent molecule. No Brewster window is needed to separate the lasing gas from the absorbing deuterated methanol. An absorption line is assigned as E1 symmetry (n, K, J): (1,4,18) → (1,5,18) and its frequency is measured as 63.08631 cm-1 with a precision of a few parts in 107; two more absorptions are reported and a tentative assignment is given for one of them.374547551Moruzzi, G., Moraes, J.C.S., Strumia, F., (1992) Int. J. Infrared Millim. Waves, 13, pp. 1269-1312Pereira, D., Moraes, J.C.S., Telles, E.M., Scalabrin, A., Strumia, F., Moretti, A., Carelli, G., Massa, C.A., (1994) Int. J. Infrared Millim. Waves, 15, pp. 1-44Carli, B., Carlotti, M., Mencaraglia, F., Rossi, E., (1987) Appl. Opt., 26, pp. 3818-3822Inguscio, M., Ioli, N., Moretti, A., Strumia, F., D'Amato, F., (1984) Int. J. Infrared Millim. Waves, 5, pp. 1695-11639Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1992) Int. J. Infrared Millim. Waves, 13, pp. 1801-1823Inguscio, M., Moretti, A., Moruzzi, G., Strumia, F., (1981) Int. J. Infrared Millim. Waves, 2, pp. 943-986Inguscio, M., Moruzzi, G., Evenson, K.M., Jennings, D.A., (1986) J. Appl. Phys., 60, pp. R161-R192Xu, L.H., Lees, R.M., Mukhopadhyay, I., Johns, J.W.C., Moruzzi, G., (1993) J. Mol. Spectrosc., 157, pp. 447-466Moraes, J.C.S., Scalabrin, A., Pereira, D., Di Lonardo, G., Fusina, L., (1991) Infrared Phys., 31, pp. 365-372Moraes, J.C.S., Telles, E.M., Cruz, F.C., Scalabrin, A., Pereira, D., Carelli, G., Ioli, N., Strumia, F., (1991) Int. J. Infrared Millim. Waves, 12, pp. 1475-1486Telles, E.M., Moraes, J.C.S., Scalabrin, A., Pereira, D., Carelli, G., Massa, C.A., Moretti, A., Strumia, F., (1994) XIX Int. Conf. IRMMW (Sendai, Japan), pp. 524-525. , K. Sakai and T. Yoneyama edsInguscio, M., Minguzzi, P., Moretti, A., Strumia, F., Tonelli, M., (1979) Appl. Phys., 18, pp. 261-270Redon, M., Gastaud, C., Fourrier, M., (1979) IEEE J. Quantum Electron., QE-15, pp. 412-414Ioli, N., Moretti, A., Roselli, P., Strumia, F., (1986) J. Opt. Soc. Am. B, 3, pp. 867-869Inguscio, M., Ioli, N., Moretti, A., Strumia, F., D'Amato, F., (1986) Appl. Phys. B, 40, pp. 165-169Xu, L.H., (1992), PhD Thesis, University of New Brunswick, CAXu, L.H., private communicatio

    Vibrational And Rotational Spectroscopy Of 13cd3od

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    We 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 Fourier Transform Spectroscopy Of 13cd3oh In The 10 μm Region

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    The high resolution IR Fourier transform spectrum of 13CD3OH was recorded in the region between 910 and 1070cm-1. By using all the previously known spectroscopic data of 13CD3OH, we determined the frequency and the J quantum number for the multiplets of the P and R branches of the CO stretching fundamental band. Transitions in coincidence with the line frequencies of a waveguide CO2 laser were also identified. © 1991.314365372Borden, Barker, The Infra-Red Absorption Spectrum of Methyl Alcohol (1939) The Journal of Chemical Physics, 6, p. 553Koehler, Dennison, (1940) Phys. Rev., 57, p. 1006Chang, Bridges, (1970) Opt. Commun., 1, p. 423Inguscio, Moruzzi, Evenson, Jennings, (1986) J. appl. Phys., 60, p. R161Inguscio, Strumia, Henningsen, (1984) Reviews of Infrared and MM Waves, 2, pp. 105-150. , K.J. Button, M. Inguscio, F. Strumia, Plenum Press, New YorkLees, Baker, (1968) J. chem. Phys., 48, p. 5299Kwan, Dennison, (1972) J. molec. Spectrosc., 43, p. 291Henningsen, (1982) Infrared and MM Waves, 5, pp. 29-124. , K.J. Button, Academic Press, New YorkPickett, Cohen, Brinza, Schaefer, (1981) J. molec. Spectrosc., 89, p. 542Moruzzi, Strumia, Bonetti, Carli, Mencaraglia, Carlotti, Di Lonardo, Trombetti, (1984) J. molec. Spectrosc., 105, p. 24Moruzzi, Strumia, Carnesecchi, Carli, Carlotti, (1989) Infrared Phys., 29, p. 47Moruzzi, Prevedelli, Evenson, Jennings, Vanek, Inguscio, (1989) Infrared Phys., 29, p. 541Moruzzi, Strumia, Carnesecchi, Lees, Mukhopadhyay, Johns, (1989) Infrared Phys., 29, p. 583Mukhopadhyay, Lees, Johns, High-resolution far-infrared spectroscopy of C-13 methanol (1989) International Journal of Infrared and Millimeter Waves, 9, p. 1119Mukhopadhyay, Mollabashi, Lees, Johns, (1989) J. molec. Spectrosc., 138, p. 521Inguscio, Evenson, Petersen, Strumia, Vasconcellos, (1984) Int. J. infrared millimeter Waves, 5, p. 1289Mukhopadhyay, Lees, Lewis-Bevan, (1988) Int. J. infrared millimeter Waves, 9, p. 545Cruz, Scalabrin, Pereira, 14th Int. Conf. on Infrared and Millimeter Waves (1989) 14th Int. Conf. on Infrared and Millimeter Waves, pp. 358-359. , Würzburg, Germany, Conf. DigestBradley, Soohoo, Freed, Absolute frequencies of lasing transitions in nine CO<inf>2</inf>isotopic species (1986) IEEE Journal of Quantum Electronics, 22 QE, p. 234Ioli, Moruzzi, Strumia, (1980) Lett. Nuovo Cimento, 28, p. 257Strumia, Ioli, Physics of New Laser Sources (1985) NATO ASI Series, 132. , N.B. Abraham, F.T. Arecchi, A. Moradian, A. Sona, Plenum Press, New YorkWalker, Straw, (1970) Spectroscopy, pp. 99-104. , Chapman & Hall, LondonIoli, Moretti, Strumia, (1989) Appl. Phys. B, 48, p. 30
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