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51.
Shayesteh A Appadoo DR Gordon IE Bernath PF 《Journal of the American Chemical Society》2004,126(44):14356-14357
Gaseous ZnH2 and ZnD2 have been discovered in an emission source that combines an electrical discharge with a high-temperature furnace. High-resolution infrared emission spectra of ZnH2 and ZnD2 have been recorded with a Fourier transform spectrometer, and the antisymmetric stretching fundamental bands of 64ZnH2 and 64ZnD2 were detected near 1889.4 and 1371.6 cm-1, respectively. Rotational analysis of the bands yielded r0 bond distances of 1.535 271(1) and 1.531 836(9) A for linear 64ZnH2 and 64ZnD2, respectively. 相似文献
52.
The submillimeter-wave rotational transitions of TiCl in the ground state were observed using a double-modulation technique. TiCl was generated in a DC-discharge of a mixture of TiCl4 vapor (less than 1 mTorr) and Ar buffer gas (80 mTorr) at a current of 200 mA. The 4Φ3/2, 4Φ5/2, 4Φ7/2, and 4Φ9/2 spin components of Ti35Cl (v=0, 1, 2) and Ti37Cl (v=0) were detected. The data were analyzed using effective rotational constants for each spin component as well as with the usual N2 reduced Hamiltonian. Recent Fourier transform and laser data were included in our fits and we confirm that the ground state of TiCl is a 4Φr electronic state. 相似文献
53.
54.
Chowdhury PK Merer AJ Rixon SJ Bernath PF Ram RS 《Physical chemistry chemical physics : PCCP》2006,8(7):822-826
The (1,0) band of the A6sigma+-X6sigma+ electronic transition of CrH has been observed by laser-induced fluorescence following the reaction of laser-ablated Cr atoms with methanol under supersonic free-jet cooled conditions. Rotational assignments of the levels with N < or = 3 have been made by combination differences and dispersed fluorescence experiments on selected lines. These assignments complement those made from previously-recorded Fourier transform emission spectra, in which higher-N lines were assigned. The low-N rotational levels are extensively perturbed, presumably by levels of the a4sigma+, upsilon = 1 and B6pi, upsilon = 0 states. 相似文献
55.
The emission spectrum of the B2Σ+-X2Σ+ system of CN has been observed at high-resolution using a Fourier transform spectrometer. The rotational structure of a large number of bands involving vibrational levels v = 0-15 of both electronic states has been analyzed, and improved spectroscopic constants have been determined by combining the microwave and infrared measurements from previous studies. Improved spectroscopic constants for vibrational levels up to v″ = 18 in the X2Σ+ state and v′ = 19 in the B2Σ+ state have been determined by combining the measurements of the 16-13, 18-17, 18-18, 19-15, and 19-18 bands of Douglas and Routly [Astrophys. J. Suppl. 1 (1955) 295-318] and 17-14 and 17-16 bands of Ito et al. [J. Chem. Phys. 96 (1992) 4195] with our data. The band constants obtained have been used to estimate equilibrium ground state constants for CN. 相似文献
56.
57.
Nikolai F. Zobov Roman I. Ovsannikov Oleg L. Polyansky Andrew Janka Peter F. Bernath 《Journal of Molecular Spectroscopy》2006,240(1):112-119
An emission spectrum of hot D2O (1500 °C) has been analyzed in the 2077-4323 cm−1 region. A considerable number of new vibration-rotation energy levels have been determined and two new vibrational levels identified. The new (0 4 1) and (0 2 2) vibrational levels have estimated band origins of 7343.93 ± 0.01 and 7826.38 ± 0.02 cm−1, respectively. 相似文献
58.
59.
The emission spectrum of BN has been investigated in the 1800–9000 cm−1region using a Fourier transform spectrometer. BN was formed in a microwave discharge of He with a trace of BCl3and N2. The bands observed in the 3000–7800 cm−1interval have been assigned as theb1Π–a1Σ+transition, with the 0–0 band at 3513.99040(43) cm−1. This transition is analogous to theA1Πu–X1Σ+g(Phillips) system of the isoelectronic C2molecule. The rotational analysis of the 0–0, 1–1, 1–0, 2–1, 3–2, 2–0, 3–1, 4–2, and 4–1 bands has been obtained and the molecular constants for theb1Π anda1Σ+states have been determined. A local perturbation has been observed in thev= 1 vibrational level of theb1Π state nearJ= 18 caused by the interaction with thev= 3 vibrational level of thea1Σ+state. The principal equilibrium constants for thea1Σ+state are: ωe= 1705.4032(11) cm−1, ωexe= 10.55338(52) cm−1,Be= 1.683771(10), αe= 0.013857(16) cm−1, andre= 1.2745081(37) Å. Although theb1Π–a1Σ+transition has recently been seen in emission from boron nitride trapped in solid neon matrices [J. Chem. Phys.104,3143–3146 (1996)], our work represents the first observation of this transition of BN in the gas phase. 相似文献
60.
The emission spectrum of TaCl has been recorded at high resolution in the 3000-35 000 cm−1 region using a Fourier transform spectrometer. The bands were observed by microwave excitation of a mixture of TaCl5 vapor and 3.0 Torr of He. Several TaCl bands have also been recorded using the laser ablation/molecular beam source at the University of New Brunswick. A rotational analysis of a number of bands has been obtained and the majority of the stronger bands have been classified into three groups with different lower state spectroscopic constants. The three lower states have been identified as having Ω″ = 0+, Ω″ = 2, and (tentatively) Ω″ = 3. The Ω″ = 0+ and Ω″ = 2 states are very close in energy and one of these two states is the ground state of TaCl. 相似文献