SEARCH · Engineering Papers
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Multiphonon orbit-lattice relaxation of lower lying excited states of Dy doped lanthanum chloride investigated, using IR fluorescence and quantum counter techniques
Phonon spectrum of neodymium trichloride crystal lattice determined from polarized vibronic transition spectra and Zeeman effect of trivalent Pr and Nd impurity ions
Absorption spectra of rare earth trichlorides with trivalent Pr, observing vibronic transitions noting assignments of phonon branches
Divalent Eu ion ground state splitting in C3h symmetry sites and associated color centers in EPR spectrum study of Eu ion doped lanthanum trichloride
Far UV twilight airglow by rocket photometer measurements noting height profile similarity to dayglow
Multiphonon orbit-lattice relaxation rates in lanthanum bromide, lanthanum chloride and lanthanum fluoride determined using transition energy gap
Free ion and rare earth crystal energy levels spectra compared to divalent and trivalent spectra
Stark broadening measurement of two neutral helium lines in plasma
Far UV spectral intensity of B3 V star from Aerobee rocket scanning prism spectrometry, noting discrepancy with model atmosphere predictions
Relaxation effects of rare earth ions in crystals
Multiphonon orbit-lattice relaxation of excited states of rare earth ions in crystals, measuring fluorescence lifetimes, quantum efficiencies and transition rates
Phonon states effective density in neodymium trichloride from vibronic spectra accompanying electronic transitions in trivalent Pr and Nd ions
Magnon density of states of ferromagnetic gadolinium trichloride in magnetic field, using high resolution optical spectroscopy
Multiphonon orbit lattice relaxation of excited states of rare earth ions in crystals, using results to design quantum electronic devices
Venus and Jupiter low resolution UV spectra obtained with servocontrolled star tracking telescope in Aerobee rocket, noting Lyman alpha radiation characteristics
Nighttime molecular O densities between 100- 130 km determined from Schumann-Runge absorption data for successive far UV spectra of hot star
Magnetic ordering in dysprosium phosphate observed by high resolution spectral line intensity measurements, finding Neel temperature
Rocket telescope spectrometer precision pointing achieved by servocontrolling secondary mirror, discussing use for planetary atmospheres far UV spectrum studies