Collision integrals, effective cross sections, and angles of deviation for the Morse potential
Collision integrals, effective cross sections, and angles of deviation for Morse potential
Samuylov, Ye. V.↗
SEARCH · Engineering Papers
Results for “Cross Section”
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.
Optimum design of a vibrating bar with specified minimum cross section.
Optimal design expressions of vibrating bars extended to accommodate specified minimum cross section
Taylor, J. E.↗
A summary of research in electron transport and bremsstrahlung cross sections, relativity experiments, and plasma shielding
Calculations of electron transport and bremsstrahlung cross sections including relativity experiments and plasma shielding
Edmonson, N.↗
Absorption cross sections of O2 and O4 between 2000 and 2800 angstrom units
Absorption cross sections for single and double molecules of oxygen and in UV region noting disagreement with Beer law
SHARDANAND↗
Vacuum-ultraviolet absorption cross sections of CO, HCl, and ICN between 1050 and 2100 A
UV absorption cross sections of CO, HCl and ICN, analyzing reactions causing various spectral features
Myer, J. A.↗
Coulomb corrections to the Bethe-Heitler cross sections for electron-nucleus bremsstrahlung
Coulomb corrections to Bethe-Heitler cross sections for electron-nucleus bremsstrahlung
Morgan, S. H., Jr.↗
Measurement of atomic nitrogen and carbon photoionization cross sections using shock tube vacuum ultraviolet spectrometry
Atomic N and C photoionization cross sections by shock tube vacuum UV spectrometry
Marrone, P. V.↗
Stopping cross sections for 0.25-3.0-MeV He-4 ions in cadmium sulfide
Stopping cross sections of He-4 ions with energies between 0.25 and 3.0 MeV have been measured for cadmium sulfide with a probable error of plus or minus 7% to 8%. The experimental method utilized the Rutherford backscattering technique and measured the energy loss of elastically scattered He-4 ions from films of cadmium sulfide sputtered on carbon substrates. The experimental data are compared with recent experimental and theoretical results.
Miller, W. E.↗
A model function for ocean radar cross sections at 14.6 GHz
The relationship between the ocean's normalized radar cross section (NRCS) at 14.6 GHz and the surface wind vector is derived using the 3 months of Seasat microwave scatterometer (SASS) measurements. The derivation is based on the statistics of the SASS observations, and no in situ measurements are required, other than a mean global wind speed, which comes from climatology. The frequency distribution of the global wind vectors observed by SASS is assumed to be a bivariate normal probability function. A NRCS model function is found that maps the assumed wind vector statistics into the observed SASS NRCS statistics. This function is compared with a NRCS model coming from the Joint Air Sea Interaction Experiment (JASIN) and with aircraft scatterometer measurements. The results indicate that the statistically derived NRCS model is an improvement over the JASIN model, which was based on a limited number of in situ anemometer measurements.
Wentz, F. J.↗
Total absorption and photoionization cross sections of water vapor between 100 and 1000 A
Absolute photoabsorption and photoionization cross sections of water vapor are reported at a large number of discrete wavelengths between 100 and 1000 A with an estimate error of + or - 3 percent in regions free from any discrete structure. The double ionization chamber technique utilized is described. Recent calculations are shown to be in reasonable agreement with the present data.
Haddad, G. N.↗
A planar near-field scanning technique for bistatic radar cross section measurements
A progress report on the development of a bistatic radar cross section (RCS) measurement range is presented. A technique using one parabolic reflector and a planar scanning probe antenna is analyzed. The field pattern in the test zone is computed using a spatial array of signal sources. It achieved an illumination pattern with 1 dB amplitude and 15 degree phase ripple over the target zone. The required scan plane size is found to be proportional to the size of the desired test target. Scan plane probe sample spacing can be increased beyond the Nyquist lambda/2 limit permitting constant probe sample spacing over a range of frequencies.
Tuhela-Reuning, S.↗
Calculation of wing spars of variable cross-section and linear load
The calculation of wing spars of constant cross-section and load has been thoroughly treated by a large number of authors. Such is not the case,however, regarding the calculation of wing spars whose section and linear load diminish toward the ends, as in wings of trapezoidal contour and decreasing section.
SPARS↗
Ultraviolet absorption cross-sections of some carbonyl compounds and their temperature dependence
Ultraviolet absorption cross-section of phosgene (CCl2O), trichloroacetylchloride (CCl3-CClO) and trichloroacetaldehyde (CCl3-CHO) have been measured between 170 and 320 nm for temperature ranging from 210 to 295 K with classical double beam equipment. These data are compared with other available determinations performed at room temperature. Photodissociation coefficients are estimated and their temperature dependence is discussed. Impact of the photodissociation on the total atmospheric destruction of these compounds is illustrated.
Gillotay, D.↗
Measurement of the absorption cross-sections of CFC-11 at conditions representing various model atmospheres
Absorption cross-sections, K(sub V)(/(cm)(atm)), have been measured in the 9.2 and 11.8 micrometer bands of CFC-11 (CCl3F) using a high-resolution Fourier transform spectrometer. Temperature and total (N2-broadening) pressure have been varied to obtain results at conditions representative of the atmosphere. The measured absolute intensities (in units of 10(exp -17) cm/molecule of the 9.2 and 11.8 micrometer bands are 2.591 +/- 0.013 and 6.974 +/- 0.038, respectively.
Li, Zhenhua↗
Lunar Radar Cross Section at Low Frequency
Recent bistatic measurements of the lunar radar cross-section have extended the spectrum to long radio wavelength. We have utilized the HF Active Auroral Research Program (HAARP) radar facility near Gakona, Alaska to transmit high power pulses at 8.075 MHz to the Moon; the echo pulses were received onboard the NASA/WIND spacecraft by the WAVES HF receiver. This lunar radar experiment follows our previous use of earth-based HF radar with satellites to conduct space experiments. The spacecraft was approaching the Moon for a scheduled orbit perturbation when our experiment of 13 September 2001 was conducted. During the two-hour experiment, the radial distance of the satellite from the Moon varied from 28 to 24 Rm, where Rm is in lunar radii.
Rodriguez, P.↗
Electron Excitation Cross Sections for the 3s(sup 2)(sup 2) 3P 3s3p(sup 3) (sup 5)S Transition in S(sup 2+)
Experimental and theoretical collisional excitation cross sections are reported for the 3s square 3p- 3s3p cube 5S to the zero spin-forbidden transition in S square+.
excitation cross sections highly-charged ions IO t↗
Slender body treatment of some specialized problems associated with elliptic-cross-section missile configurations
Slender body methods were applied to some specialized problems associated with missile configurations with elliptic cross sections. Expressions are derived for computing the velocity distribution on the nose section when the ellipse eccentricity is varying longitudinally on the missile. The cross flow velocity on a triform fin section is also studied.
Barger, R. L.↗
The ENDF/B-VIII.0 Compendium Volume I: Neutron Cross Section Plots
Version 8 of the Evaluated Nuclear Data File (ENDF/B-VIII.0) contains a wealth of nuclear data representing the most recent collection of evaluated neutron cross section measurements, isotopic radioactive decay, and much more. This Compendium has been prepared as a easily-navigable reference of the contents of the ENDF/B-VIII.0 library, while making no statement regarding the accuracy of those contents. The Compendium is split into four volumes.
07 ISOTOPE AND RADIATION SOURCES↗