2,020 research outputs found
Terahertz Laser Generation By Optically Pumped Polar Molecules
No full textIn this work we report 12 new optically pumped far-infrared (FIR) laser lines from CH3OH and 19 from 13CH3OH. A 13CO2 laser of wide tunability (110 MHz) was used as pump source, and a Fabry-Perot open cavity was used as a FIR laser resonator. © 2007 Optical Society of America.Costa, L.F.L., Viscovini, R.C., Moraes, J.C.S., Cruz, F.C., Pereira, D., CH3OH Optically pumped by a 13CO2 laser: New laser lines and assignments (2006) Appl. Phys. B, , acceptedCosta, L.F.L., Viscovini, R.C., Moraes, J.C.S., Cruz, F.C., Pereira, D., Infrared and Far-Infrared Spectroscopy of 13CH3OH: Terahertz Laser Lines and Assignments (2006), submitted, NovemberGregory, I.S., Baker, C., Tribe, W.R., Bradley, I.V., Evans, M.J., Linfield, E.H., Davies, A.G., Missous, M., Optimization of Photomixers and Antennas for Continuous-Wave Terahertz Emission (2005) IEEE J. Quantum Electron, 41, pp. 717-728Kemp, M.C., Taday, P.F., Cole, B.E., Cluff, J.A., Fitzgerald, A.J., Tribe, W.R., Security applications of terahertz technology (2003) Proc SPIE, 5070, pp. 44-52Arnone, D.D., Ciesla, C.M., Pepper, M., Terahertz imaging comes into view (2000) Phys. World, 13, pp. 35-40Carelli, G., Ioli, N., Moretti, A., Pereira, D., Strumia, F., New large offset far-infrared laser lines CD3OH (1987) Appl. Phys. B., 44, pp. 111-117Inguscio, M., Moretti, A., Strumia, F., IR-FIR Tranferred Lamb-Dip Spectroscopy in Optically Pumped Molecular Lasers (1979) Opt. Commun., 30, pp. 355-35
R.C. Farrell Store
No full textPhotograph - People standing in front of R.C. Farrell, General Merchant store, Athabasca, Alberta. Left to right: Lance Smith, Louis Menard, Romeo Farrell, Athela LaRue Farrell, and Ray Vari
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
A Review of: Biobloc Therapy, by John R.C. Mew
No full textThis text, written and published by its British author, John R.C. Mew, details an integrated orthodontic and orofacial myofunctional treatment approach entitled Biobloc Therapy [...
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
Ch3oh Optically Pumped By A 13co2 Laser: New Laser Lines And Assignments
No full textWe 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
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
Experimental Research and Numerical Analysis on the Law of Deteriorated Performance for R.C. Frame Structure with Seismic Damages under Elevated Temperature (part II)
No full textThe cracks were pre-settled to the R.C. frame structure caused by earthquake which was defined as the damage index ω during the modeling process with analysis software-ANASYS. The temperature field contour curve were calculated for the column and beam, the law of deteriorated bearing capacity with time for the R.C. frame structure under elevated temperature were brought forward，which can adapt to R.C. frame structure with different damage index ω caused by earthquake.The relationship between ω and deteriorated bearing capacity for R.C. frame structure was also given, which was proved to be effective and correct according to comparison with the data recorded from the elevated temperature experiment designed by author.</jats:p
Internal Friction in The Region of The Grain Boundary Peaks in Pure Zirconium and Dilute Zirconium Alloys
No full textTitle: Internal Friction in The Region of The Grain Boundary Peaks in Pure Zirconium and Dilute Zirconium Alloys, Author: R.C. Robinson, Location: ThodeInternal friction, in the region of the
grain boundary peaks, has been examined in nominally
pure zirconium and dilute zirconium alloys. Experimental
observations were made using both torsion and
reed internal friction pendulums. The effect of various
heat treatments on the peaks were investigated. Strain
amplitude dependent damping in the region of the Low
Temperature Peak was observed. A qualitative model
is presented to explain the experimental observations.ThesisMaster of Engineering (ME
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