Absorption spectrum in the vacuum ultraviolet and visible emission spectrum of the NO molecule. The 4d complex

1969 ◽  
Vol 47 (8) ◽  
pp. 881-891 ◽  
Author(s):  
R. Suter
Keyword(s):  
Nitric Oxide ◽  
Absorption Spectrum ◽  
Emission Spectrum ◽  
Vacuum Ultraviolet ◽  
Visible Emission ◽  
Resolving Power ◽  
Weak Band ◽  
Oxide Molecule ◽  
Rydberg Electron

The structure of the 4d Rydberg term complex of the nitric oxide molecule has been studied by rotational analyses of the following bands photographed with spectrographs of high resolving power: (i) the weak band 4d–X2Π observed at 1470 Å in the absorption spectrum, (ii) the group 4d–3p of Rydberg–Rydberg bands observed as 4d–C2Π (6400 Å) and 4d–D2Σ+ (6800 Å) bands in the emission spectrum of a discharge. A type of l uncoupling of the Rydberg electron of the molecule is found very similar to the case already known for the 3d complex of NO. Constants characterizing the d complexes are calculated, and a comparison of the 3d and 4d complex is made.

ABSORPTION SPECTRUM OF THE NO MOLECULE: II. NEW FINE-STRUCTURE ANALYSES BELOW 1600 Å

1962 ◽  
Vol 40 (3) ◽  
pp. 352-357 ◽  
Author(s):  
A. Lagerqvist ◽  
E. Miescher
Keyword(s):  
Nitric Oxide ◽  
Absorption Spectrum ◽  
Fine Structure ◽  
Oxide Molecule

Several new excited doublet states of the nitric oxide molecule are identified. Some of these are upper states of NO bands observed in the visible and infrared.

Absorption spectrum of the NO molecule. IX. The structure of the f complexes, the ionization potential of NO, and the quadrupole moment of NO+

1969 ◽  
Vol 47 (17) ◽  
pp. 1769-1787 ◽  
Author(s):  
Ch. Jungen ◽  
E. Miescher
Keyword(s):  
Nitric Oxide ◽  
Absorption Spectrum ◽  
Angular Momentum ◽  
High Resolution ◽  
Ionization Potential ◽  
Quadrupole Moment ◽  
Electron Spin ◽  
Rydberg Series ◽  
Molecular Core ◽  
Rydberg Electron

The 0–0 bands at 1474 Å and 1422 Å of the first two members of the nf–X2Π Rydberg series of NO have been observed under high resolution in the absorption spectrum of cold nitric oxide gas. They show an abnormal rotational structure which has been analyzed with the help of a computer program. The uncoupling of the angular momentum l = 3 of the f electron in the rotating molecule is discussed theoretically, including the effect of electron spin and interaction with the molecular core. The connection between the electronic energies TΛ of the f complex in the nonrotating molecule and the electronic energies [Formula: see text] in the rapidly rotating molecule is given. From the analysis a precise value of the ionization potential of NO is obtained, viz. T∞ = 9.2639 ± 0.0006 eV, and the quadrupole moment of the molecular ion NO+ is determined to be Qzz = +(0.79 ± 0.06) 10−26 e.s.u. cm2. The "atomic" and the "molecular" properties of a highly excited molecular Rydberg electron are discussed.

High resolution spectrum of GdO

1976 ◽  
Vol 54 (24) ◽  
pp. 2429-2434 ◽  
Author(s):  
B. R. Yadav ◽  
S. B. Rai ◽  
D. K. Rai
Keyword(s):  
High Resolution ◽  
Emission Spectrum ◽  
Visible Emission ◽  
High Resolution Spectrum ◽  
First Order ◽  
Isotopic Shifts ◽  
Vibrational Constants ◽  
Dc Arc

The visible emission spectrum of the GdO molecule has been produced in a DC arc source and has been photographed in the first order of a 10.6 m grating spectrograph. Bands are shown to have a six-headed structure and improved vibrational constants have been obtained in this study. Isotopic shifts have been calculated for the various isotopic molecules. Tentative suggestions regarding the nature of the transition have been made.

Vacuum ultraviolet absorption spectrum of p-benzoquinone

1986 ◽  
Vol 82 (3) ◽  
pp. 367 ◽  
Author(s):  
Paul Brint ◽  
Jean-Patrick Connerade ◽  
Pericles Tsekeris ◽  
Agisilaos Bolovinos ◽  
Aslam Baig
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
Ultraviolet Absorption ◽  
Ultraviolet Absorption Spectrum

A fluorescence enhancement assay of cell fusion

1977 ◽  
Vol 28 (1) ◽  
pp. 167-177
Author(s):  
P.M. Keller ◽  
S. Person ◽  
W. Snipes
Keyword(s):  
Absorption Spectrum ◽  
Energy Transfer ◽  
Emission Spectrum ◽  
Cell Fusion ◽  
Saturated Hydrocarbon ◽  
Photon Emission ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Hydrocarbon Chains ◽  
Fluorescent Molecules

Two probes were synthesized which consist of fluorescent molecules conjugated to saturated hydrocarbon chains, 18 carbons long, to ensure their localization into cellular membranes. There is an overlap between the emission spectrum of one probe (donor) and the absorption spectrum of the other probe (acceptor). By the use of appropriate wavelengths it is possible to specifically excite the donor probe and record the fluorescence of the acceptor probe. Two cell populations, each labelled with one of the probes, were infected with a virus that causes cell fusion, mixed in equal proportions, and the fluorescence of the acceptor probe measured as a function of time after infection. An increase in fluorescence was observed beginning at the time of onset of cell fusion indicating a mixing of the fluorescent membrane molecules. An investigation of the distance dependence indicated that the increase in fluorescence was mainly due to resonance energy transfer and not to photon emission and reabsorption. Resonance energy transfer requires that the 2 probes be close together and that there be an overlap of the emission spectrum of the donor probe and the absorption spectrum of the acceptor probe. The possible application of this assay to other types of membrane fusion is noted.

The K I absorption spectrum in the vacuum ultraviolet: 3p-subshell excitation

1975 ◽  
Vol 346 (1647) ◽  
pp. 539-553 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Vacuum Ultraviolet ◽  
Hartree Fock

The K I absorption spectrum has been photographed in the range 700–350 Å, revealing at least 140 new features. Comparisons with Hartree–Fock calculations are used for interpretation. All observed features can be attributed to excitation of the 3p-subshell and an assignment–often tentative–is given to nearly every observed feature.

Extensions to the spectrum of doubly excited Mg I in the vacuum ultraviolet

1978 ◽  
Vol 364 (1718) ◽  
pp. 353-366 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Ab Initio ◽  
Electron Impact ◽  
Vacuum Ultraviolet ◽  
Background Radiation ◽  
Valence Shell ◽  
Electron Synchrotron ◽  
Doubly Excited ◽  
High Series ◽  
The Continuum

The absorption spectrum of Mg I vapour between 2000 and 700 ņ has been reinvestigated, using the continuum emitted by the Bonn 500 MeV electron synchrotron as the source of background radiation. Extensions to the double excitation spectrum of the valence shell have resulted and are compared with recent data obtained by electron impact spectroscopy. Ab initio calculations of the doubly excited configurations have been extended to high series members, and the transition from LS to jj coupling is shown to be responsible for the appearance of a 1 S 0 - 3 P 1 series not previously detected by photoabsorption.

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