Results 211 to 220 of about 353,875 (266)

Meteor Ion Spectra

Nature, 1968
Ionic spectral lines emitted by vapors of high and low velocity meteoroids, investigating excited ions and metastable molecules production ...
HERBERT S. HOFFMAN, MARTIN S. LONGMIRE
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Heavy Ion RBE and Microdosimetric Spectra

Radiation Protection Dosimetry, 2002
Reliable values for the relative biological effectiveness (RBE) of the complex field of heavy ions is essential for radiation therapy with carbon beams. Clinical experience with this novel form of therapy is still quite narrow and it is, therefore, desirable to compare and combine relevant clinical findings and theoretical approaches.
R, Gerlach, H, Roos, A M, Kellerer
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Photoelectron Spectra and Ion Chemistry of Imidazolide

The Journal of Physical Chemistry A, 2005
The 351.1 nm photoelectron spectrum of imidazolide anion has been measured. The electron affinity (EA) of the imidazolyl radical is determined to be 2.613 +/- 0.006 eV. Vibrational frequencies of 955 +/- 15 and 1365 +/- 20 cm(-1) are observed in the spectrum of the (2)B1 ground state of the imidazolyl radical. The main features in the spectrum are well-
Adam J, Gianola, Takatoshi, Ichino, Rebecca L, Hoenigman, Shuji, Kato, Veronica M, Bierbaum, W Carl, Lineberger   +5 more
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Interpretation of secondary ion mass spectra by means of fingerprint spectra and secondary ion imaging

Applied physics, 1975
A passive layer, of several thousand A thickness, formed on a polycrystalline nickel electrode, has been examined using secondary ion mass spectrometry (SIMS) by spottering with a 5.5 keV, 13μA·cm−2,40Ar+ primary beam. Concentration profiles were detived by monitoring the intensities of atomic and molecular mass peaks as a function of sputtering time ...
H. W. Werner, A. E. Morgan, H. A. M. de Grefte   +2 more
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Intensities in the Spectra of Actinyl Ions

The Journal of Physical Chemistry A, 2000
The absorption spectra of species in aqueous solution are investigated theoretically and experimentally, and the spectrum of species is investigated theoretically. The spectrum of perchloric acid solution was taken from 350 to 1350 nm. Peak positions and optical densities are reported with overall uncertainties of 0.3 nm and 3%, respectively.
Spiridoula Matsika, Russell M. Pitzer, Donald T. Reed   +2 more
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Raman spectra of inorganic ions

Spectrochimica Acta Part A: Molecular Spectroscopy, 1993
Abstract This paper contains the Raman spectra of 79 inorganic salts and sulphur which may be used as an aid in qualitative inorganic analyses. These were obtained some years ago by conventional Raman spectroscopy. No such collection exists and the order of the reference spectra is identical to those in a collection of IR spectra.
I.A. Degen, G.A. Newman
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NMR spectra of AgF4− ion

Journal of Fluorine Chemistry, 1999
Abstract The 109 Ag and 19 F NMR spectra of KAgF4 dissolved in anhydrous HF are reported. The 109 Ag chemical shift, +5270 ppm, is far off from that of any other Ag(III) or Ag(I) species, thus reflecting the extreme chemical properties of the AgF4− anion.
Reint Eujen, Boris Zemva
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Vibrational spectra of the tetramethylpnikogenonium ions

Journal of Molecular Spectroscopy, 2003
Abstract The tetramethylpnikogenonium ions (CH 3 ) 4 X + (X = N, P, As, Sb) have been studied by infrared and Raman spectroscopy. Additionally, their structures and vibrational frequencies were ab initio calculated at the HF/6-31+G* and for (CH 3 ) 4 Sb + at the HF/6-31+G*/LANL2DZ level of theory.
Andreas Kornath, Oliver Blecher, Frank Neumann, Ralf Ludwig   +3 more
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The energy spectra of sputtered ions

Radiation Effects, 1972
Abstract The energy spectrum of Cu+ ions sputtered from Cu single crystals has been studied using a retarding potential energy selector method which incorporates a quadrupole mass filter as detector. The behaviour of the energy spectrum of Cu+ in the region of the 〈110〉, 〈100〉 focused ejection spots has been studied in detail and the results compared ...
E. Dennis, R. J. Macdonald
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Spectra of Molecular Ions

Berichte der Bunsengesellschaft für physikalische Chemie, 1974
AbstractHistorically the study of the spectra of diatomic molecular ions has been an important contributor to the development of molecular orbital theory. In view of the importance of molecular ions for radiation chemistry on the one hand and astrophysics (especially the study of the interstellar medium) on the other, we have started a program aimed at
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