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THEORETICAL AND EXPERIMENTAL ASPECTS OF THE ROTATIONAL SPECTROSCOPY OF SMALL MOLECULESFry, Herbert Alan January 1981 (has links)
Theoretical and experimental aspects of high resolution spectroscopy are discussed. The theoretical work concentrates on the matrix elements of the rigid rotor and molecular hyperfine terms of the Hamiltonian of a rotating molecule. The experimental work consists of Stark cell and beam maser microwave spectroscopy on C1CN and HDO respectively. The theory of rotational spectroscopy is developed in a uniform manner based on the irreducible tensor method. It is shown how the effect of molecular symmetry may be incorporated into this method. The instrumentation required to observe the hyperfine splittings is discussed. This includes descriptions of the Stark cell and molecular beam maser microwave spectrometers. A new tunable C-band resonant cavity is described. The following molecular constants are reported for both common species of C1CN: rotational constant Bₒ, centrifugal distortion constant D(J), quadrupole coupling constant eqQ(k), and spin-rotation constant C(x). Values in MHz for C1CN are as follows: ³⁵C1CN; Bₒ = 5 907.820 ± 0.010, eqQ(C1) = -83.26 ± 0.06, eqQ(N) = -3.59 ± 0.08, C(C1) = -0.006 ± 0.006, C(N) = 0.013 ± 0.010; ³⁷C1CN; Bₒ = 5 847.246 ± 0.008, eqQ(C1) = -65.61 ± 0.06, eqQ(N) = -3.61 ± 0.08, C(C1) = -0.004 ± 0.006, C(N) = 0.010 ± 0.010. The following molecular constants for HDO are reported: quadrupole coupling tensor elements eqQ(D)(gg) and spin-rotation tensor elements C(x)(gg). The values in KHz are as follows: eqQ(D)(aa) = 276.45 ± .88, eqQ(D)(bb) = -110.97 ± 1.46, eqQ(D)(cc) = -165.77 ± 1.10, C(D)(aa) = 1.33 ± .20, C(D)(bb) = -4.38 ± .36, C(D)(cc) = -2.99 ± .24, C(H)(aa) = -58.42 ± .47, C(H)(bb) = -5.46 ± .83, C(H)(cc) = -23.28 ± .10. The values for the constants for C1CN agree with previous values but are more precise. Those for HDO do not agree with previous values but are thought to be more accurate since they are obtained for a larger data base.
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Centrifugal distortion in asymmetric moleculesJanuary 1950 (has links)
R.E. Hillger, M.W.P. Strandberg. / II. HDS. / "October 5, 1950." / Includes bibliography. / Army Signal Corps Contract DA36-039 sc-100 Project no. 8-102B-0. Dept. of the Army Project 3-99-10-022.
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The dissociative single and double ionization of some simple molecules by fast ion and VUV photonsBrowne, Clive R. H. January 1998 (has links)
No description available.
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Observation of the infrared spectrum of the doubly charged molecular ion D'3'7Cl'2'+Smith, Fiona Elizabeth January 2000 (has links)
No description available.
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