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Topic Area: Spectroscopy

Displaying records 41 to 50 of 113 records.
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41. Relative Photon-to-Carrier Efficiencies of Alternating Nanolayers of Zinc Phthalocyanine and C60 Multilayer Films Assessed by Time-Resolved Terahertz Spectroscopy
Topic: Spectroscopy
Published: 10/1/2009
Authors: Okan Esenturk, Joseph S Melinger, Paul A. Lane, Edwin J Heilweil
Abstract: Alternating multi-layer and 1:1 blended films of zinc phthalocyanine (ZnPc)and buckminsterfullerene (C60) were investigated as model active layers for solar cells by Time-Resolved Terahertz Spectroscopy (TRTS). Relative photon-to-carrier efficiencies ...

42. Spectrum Simulation in DTSA-II
Report Number: 832430
Topic: Spectroscopy
Published: 10/1/2009
Author: Nicholas W m Ritchie
Abstract: Spectrum simulation is a useful practical and pedagogical tool. Particularly with complex samples or trace constituents, a simulation can help to understand the limits of the technique and how to optimize the tools for the optimal measurement. DTSA- ...

43. Application of Histograms in Evaluation of Large Collections of Gas Chromatographic Retention Indices
Topic: Spectroscopy
Published: 9/18/2009
Authors: Zenkevich G. Igor, Valeri Ivan Babushok, Peter J Linstrom, Edward White, Stephen E Stein
Abstract: The effective use of gas chromatographic retention data presented in the form of reten¬tion indices (RI) requires the development of a compre¬hensive structure-based digital archive of retention parameters. Development of such an archive includes the ...

44. Microwave Spectrum of 1,2-Propanediol
Topic: Spectroscopy
Published: 9/1/2009
Authors: Francis John Lovas, David F Plusquellic, Brooks Pate, Justin L. Neill, Matt T. Muckle, Anthony J. Remijan
Abstract: The microwave spectrum of the sugar alcohol 1,2-propanediol (CH3CHOHCH2OH) has been measured over the frequency range 6.5 GHz to 25.0 GHz with several pulsed-beam Fourier-transform microwave spectrometers. Seven conformers of 1,2-propanediol have be ...

45. Scaling Factors and Uncertainties for ab Initio Anharmonic Vibrational Frequencies
Topic: Spectroscopy
Published: 8/21/2009
Authors: Russell D Johnson III, Karl K Irikura, Raghu N Kacker, Ruediger Kessel
Abstract: To predict the vibrational spectra of molecules, ab initio calculations are often used to compute harmonic frequencies, which are usually scaled by empirical factors as an approximate correction for errors in the force constants and for anharmonic ef ...

46. Procedures for Wavelength Calibration and Spectral Response Correction of CCD Array Spectrometers
Topic: Spectroscopy
Published: 7/31/2009
Authors: Adolfas Kastytis Gaigalas, Lili Wang, Hua-Jun He, Paul C DeRose
Abstract: This work describes a procedure for acquiring a spectrum of an analyte over an extended range of wavelengths and validating the wavelength and intensity assignments. To acquire a spectrum over an extended range of wavelengths with a spectrometer with ...

47. Progress in Quantitative Surface Analysis by X-ray Photoelectron Spectroscopy: Current Status and Perspectives
Topic: Spectroscopy
Published: 5/14/2009
Authors: Cedric John Powell, Aleksander Jablonski
Abstract: We give a survey of information needed for quantitative surface analyses by X-ray photoelectron spectroscopy (XPS). We describe four terms (the inelastic mean free path, the effective attenuation length, the mean escape depth, and the information dep ...

48. Spectroscopic Line Parameters of Water Vapor for Rotation-Vibration Transitions near 7180 cm^(-1)
Topic: Spectroscopy
Published: 5/13/2009
Authors: Daniel Lisak, Daniel K. Havey, Joseph Terence Hodges
Abstract: We present low uncertainty measurements of line parameters for fifteen rotation-vibration transitions of water vapor in the wave number range 7170.27 cm^(-1) to 7183.02 cm^(-1). These experiments incorporated frequency-stabilized cavity ring-down spe ...

49. Characterization of Standard Reference Material 2940, Mn-Ion-Doped Glass, Spectral Correction Standard for Fluorescence
Topic: Spectroscopy
Published: 4/1/2009
Authors: Paul C DeRose, Melody V Smith, Klaus Mielenz, Douglas H. Blackburn, Gary W Kramer
Abstract: Standard Reference Material (SRM) 2940 is a cuvette-shaped, Mn-ion-doped glass, recommended for use for relative spectral correction of emission and day-to-day performance validation of steady-state fluorescence spectrometers. Properties of this stan ...

50. High resolution spectroscopy using fiber-laser frequency combs
Topic: Spectroscopy
Published: 6/8/2008
Authors: Ian R Coddington, William C Swann, Nathan Reynolds Newbury
Abstract: The output of a femtosecond fiber laser can be both spectrally broadened and stabilized, thereby providing a broadband coherent source in the near infrared. In the frequency domain, the result is a frequency comb with frequency stabilities at the mil ...

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