Results 281 to 290 of about 167,062 (317)
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2013
Contents Microwave spectroscopy 396 Selection rules 396 Brief illustration 42.1: Gross selection rules for microwave spectroscopy 397 The appearance of microwave spectra 398 Example 42.1: Predicting the appearance of a rotational spectrum 398
Peter Atkins +2 more
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Contents Microwave spectroscopy 396 Selection rules 396 Brief illustration 42.1: Gross selection rules for microwave spectroscopy 397 The appearance of microwave spectra 398 Example 42.1: Predicting the appearance of a rotational spectrum 398
Peter Atkins +2 more
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Rotational spectroscopy meets theory
Physical Chemistry Chemical Physics, 2013Rotational spectroscopy is known to be a technique that is widely used to infer information on molecular structure and dynamics. In the last few decades, its role in the field of atmospheric and astrophysical investigations has rapidly grown. However, several are the challenging aspects in rotational spectroscopy, since the detection and analysis of ...
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1998
This chapter cites a gas phase sample that demonstrates molecules in continual motion, appropriate to its thermal energy. It describes the continual motion of the molecules as rotational energy, which is the kinetic energy associated with the tumbling motion of the molecules relative to an observer in the laboratory.
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This chapter cites a gas phase sample that demonstrates molecules in continual motion, appropriate to its thermal energy. It describes the continual motion of the molecules as rotational energy, which is the kinetic energy associated with the tumbling motion of the molecules relative to an observer in the laboratory.
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Vibration-Rotation Spectroscopy
Annual Review of Physical Chemistry, 1955Since the general background of vibration-rotation spectroscopy has quite recently been brought up to date in reviews of this series it seems possible to dispense with any general introduction to this subject. In this review it is proposed to indicate some present trends and to give a reasonably complete though not exhaustive account of recent ...
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SPIE Proceedings, 1990
This paper pertains to rotational coherence spectroscopy, a time-domain method of high resolution rotational spectroscopy based on the quantum beat phenomenon. We present a brief discussion of the theoretical basis of the method and a consideration of its advantages over spectral domain methods. We also present experimental results on two species - 1,2-
Peter M. Felker +3 more
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This paper pertains to rotational coherence spectroscopy, a time-domain method of high resolution rotational spectroscopy based on the quantum beat phenomenon. We present a brief discussion of the theoretical basis of the method and a consideration of its advantages over spectral domain methods. We also present experimental results on two species - 1,2-
Peter M. Felker +3 more
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Collisions and rotational spectroscopy
Journal of Molecular Spectroscopy, 1992Abstract Motivated by Oka's early work on molecular collisions and especially collision-induced rotational transitions, this paper addresses progress in these areas. Particular attention is paid to recent extensions to lower energy collisions of astrophysical significance and to questions about the relation between experimental observables and the ...
Thomas M. Goyette +3 more
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Photoacoustic rotational Raman spectroscopy
The Journal of the Acoustical Society of America, 1981A method and apparatus for spectroscopic material analysis are provided. Two coherent beams of monochromatic radiation are directed through a sample of material. A tuning mechanism adjusts the frequency difference between the radiation beams to equal substantially the rotational frequency of a preselected constituent of the material.
Joseph J. Barrett, Gary A. West
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Abstract This chapter starts with a discussion of classical rotation of rigid bodies and moments of inertia. Asymmetric, symmetric, and spherical tops are defined. Rotational energy levels of diatomic and linear molecules are derived, along with selection rules and spectra. Rotational energy levels of symmetric tops are derived including
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Rotational and vibrational spectroscopy
2015This chapter presents a brief introduction to rotational and vibrational spectroscopy. It explains how pure rotational spectroscopy can be used in the precise determination of molecular geometry in small molecules and provide a direct means to deduce the shape of larger molecules.
Simon Duckett +2 more
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Rotational spectroscopy and astrochemistry
Journal of Molecular Structure, 1995Abstract During the last 25 years, the close collaboration between laboratory spectrocopists and astrophysicists allowed the detection of about one hundred different molecular species in the interstellar medium, largely via their rotational emission spectra.
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