Fundamental atom chemistry - applications to chemistry of the upper atmosphere
Ortho-paraconversion of nitrogen and tritium, metastable molecules and nitrogen-hydrocarbon reactions, and chemiluminescence of lead, bismuth, and sulfur
LEAD↗
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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Dissociation of CH4 by electron impact: Production of metastable hydrogen and carbon fragments
Metastable fragments produced by electron impact excitation of CH4 have been investigated for incident electron energies from threshold to 300 eV. Only metastable hydrogen and carbon atoms were observed. Onset energies for the production of metastable hydrogen atoms were observed at electron impact energies of 22.0 + or - .5 eV, 25.5 + or - .6 eV, 36.7 + or - .6 eV and 66 + or - 3 eV, and at 26.6 + or - .6 eV for the production of metastable carbon atoms. Most of the fragments appear to have been formed in high-lying Rydberg states. The total metastable hydrogen cross section reaches a maximum value of approximately 1 X 10 to the minus 18th power sq cm at 100 eV. At the same energy, the metastable carbon cross section is 2 x 10 to the minus 19th power sq cm.
Finn, T. G.↗
Research on the properties and interactions of simple atomic and ionic systems
Simple ionic systems were studied, such as metastable autoionizing states of the negative He ion, two-photon decay spectrum of metastable He ion, optical excitation with low energy ions, and lifetime measurements of singly ionized Li and metastable He ion. Simple atomic systems were also investigated. Metastable autoionizing atomic energy levels in alkali elements were included, along with lifetime measurements of Cr-53, group 2A isotopes, and alkali metal atoms using level crossing and optical double resonance spectroscopy.
Novick, R.↗
Experiments on the production and extinction of the 2s state of the hydrogen atom.
Production and extinction of 2s state of hydrogen atom during passage of initial proton beam through molecular hydrogen
IONIZATION CROSS SECTION↗
Formation of ionized excited states through the loss of the metastable electron in noble-gas atoms.
Noble gas atom simultaneous ionization and excitation by removal of metastable electron in fast collision
Koozekanani, S. H.↗
LOW FIELD HELIUM MAGNETOMETER FOR SPACE APPLICATIONS
Measurement of low magnetic fields using a magnetometer which utilizes the optical pumping of metastable helium atoms
MAGNETOMETER↗
Observations on the /1s2s2p/ 4 p 5 over 2 metastable state in lithium
Observations of metastable state of lithium
METASTABLE ATOM↗
Hyperfine splittings and gf values of metastable h2
Coupling constants of hyperfine structure evaluated by using single configuration electronic wave function for metastable molecular hydrogen
METASTABLE ATOM↗
Suppression of excited species from sputter-ion pump by a zeolite trap.
Zeolite trap of migrating photon radiated by metastable argon atoms from sputter ion pump to ion collector
PHOTON-ELECTRON INTERACTION↗
Application of a logarithmic transfer response circuit to the recording of mass spectra and especially peaks from metastable ions.
Logarithmic transfer response circuit applied to recording mass spectra, especially peaks from metastable ions
METASTABLE ATOM↗
Polarization of he super 3 negative ions.
Polarized helium 3 negative ion beam production utilizing differential metastability of hyperfine and fine structure levels
POLARIZED RADIATION↗
Spectroscopic study of the early helium afterflow.
Time-resolved spectroscopic measurement of absolute intensity, spectral profiles and self- absorption for He I lines in early helium afterglow
HELIUM AFTERGLOW↗
Direct detection of two-photon emission from the metastable state of singly ionized helium.
Detection by coincidence counting techniques of two-photon decay of metastable state of singly ionized helium
PHOTON BEAM↗
Gravitation research
Gravitation research - experimental test of Freundlich red-shift hypothesis and measurement of metastable vs ground-state electron exchange cross sections for helium and neon
HELIUM↗
Metastable measurements in flowing helium afterglow.
Microwave and optical measurements of decay of neutral metastable and charged species in flowing He afterglow
OPTICAL MEASUREMENT↗
Formation of excited molecular states in the positive column of a helium discharge.
Molecular metastables produced in positive column of helium discharge by electron excitation
ION RECOMBINATION↗
Gamma decay of Se super 73m, g and Se super 81m, g isomeric pairs.
Gamma decay of Se 73 and Se 81 isomeric pairs with half-lives, energies and decay schemes
GAMMA RADIATION↗
An excitation mechanism for the A super plus laser.
Direct excitation in argon gas from metastable state to upper laser state compared with two-step excitation
METASTABLE ATOM↗