Terahertz (THz) spectroscopy of Freon-11 (CCl3F, CFC-11) at room temperature

Date

2006-08-31

Author

Altan, Hakan
Alfano, S. A.
Alfano, R. R.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

195
views

0
downloads

The rotational spectrum for the lowest vibrational mode for CCl3F has been measured in the 0.1-2 THz frequency range using a compact time-resolved terahertz spectrometer. The peak of the population spectrum for the ground state rotational manifold was observed at 0.3 THz. The observed absorption profile was modeled with rotational and vapor pressure parameters. The limits of detectivity of the compact THz system are discussed in context of atmospheric sensing.

Subject Keywords

Spectrum

URI

https://hdl.handle.net/11511/33105

Journal

CHEMICAL PHYSICS LETTERS

DOI

https://doi.org/10.1016/j.cplett.2006.06.064

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Analysis and Fault Tolerant Control of a Five-Phase Axial Flux Permanent Magnet Synchronous Machine Bayazıt, Göksenin Hande; Keysan, Ozan; Department of Electrical and Electronics Engineering (2021-9-06) This study investigates the fault-tolerance capability of an air-cored, axial flux, five-phase permanent magnet synchronous machine. The air-cored stator is designed by adopting a novel winding topology that is called flat winding. The coils of flat winding are made by bending and grouping one within another of the flat wires made of a laser-cut thin aluminum sheet. This topology provides superior current ratings, better cooling performance, and a robust structure for the stator. As the coils are covered w...
FILTERING OF FUNCTIONAL NEAR INFRARED SPECTROSCOPY SIGNALS BY EIGENVALUE BASED METHODS Eken, Aykut (2014-04-25) Functional Near Infrared Spectroscopy is used in neuroimaging studies to observe the oxyhemoglobin (HB02) and deoxyhemoglobin (HB) changes. Blood oxygen level dependency (BOLD) signal that is collected by using this system shows response in related region in brain against an applied stimulus. Therefore in these signals, signal to noise ratio (SNR) is quite important to decide the behavior of brain in related region In this study, fNIRS data was filtered by using eigenvalue based methods such as Principal Co...
Broadband spectral splitting of light using wavefront shaping Başay, Yalın; Yüce, Emre; Yerci, Selçuk; Department of Micro and Nanotechnology (2018) Splitting of light to different frequencies is an important tool for several photonic research and applications. One of those applications is increasing the absorption of light via spectral splitting in solar energy systems. Nowadays, this splitting process is realized by fixed diffraction gratings. However, these structures can't adapt to the environmental changes and their efficiencies differ from season to season. A structure that can adapt to environmental changes would certainly increase the efficiency...
The optical spectroscopic and photometric observations of the optical counterparts to the be/x-ray binary systems: gro j2058+42 and v0332+53 Özbey, Mehtap; Kızıloğlu, Ümit; Department of Physics (2008) The spectroscopic and photometric observations of the optical counterparts to the Be/X-ray binary systems GRO J2058+42 and V0332+53 (BQ Cam), taken with RTT150 (Russian-Turkish 1.5 meter Telescope), are presented in this study. The distance, color and the reddening estimates for both sources, obtained via photometric observations, are consistent with the previous results. The results of our spectroscopic observations performed between May 2006 and June 2008 for optical counterpart to GRO J2058+42 indicate t...
Terahertz Resonances in the Dielectric Response Due to Second Order Phonons in a GaSe Crystal Yu, Baolong L; Altan, Hakan; Zeng, Fanang; Kartazayev, Vladimir; Alfano, Robert R; Mandal, Krishna C (2006-09-12) The dielectric function and momentum relaxation time of carriers for a single-crystal GaSe were investigated using terahertz time-domain spectroscopy over the frequency range from 0.4 to 2.4 THz. The key parameters determined from THz data using the Drude model are: the plasma frequency ωp = 6.1 ± 0.5 THz, the average momentum relaxation time <τ> = 51 +± 6 fs for electrons. The THz absorption spectrum showed resonance structures attributed to the difference frequency combinations associated with acoustical ...

Citation Formats

H. Altan, S. A. Alfano, and R. R. Alfano, “Terahertz (THz) spectroscopy of Freon-11 (CCl3F, CFC-11) at room temperature,” CHEMICAL PHYSICS LETTERS, pp. 241–245, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33105.