D E Shemansky
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Explore the profile of D E Shemansky including associated specialties, affiliations and a list of published articles.
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10
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29
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Recent Articles
1.
Ajello J, Shemansky D, Franklin B, Watkins J, Srivastava S, James G, et al.
Appl Opt
. 2010 Jun;
27(5):890-914.
PMID: 20523705
We have developed a simple compact electron impact laboratory source of UV radiation whose relative intensity as a function of wavelength has an accuracy traceable to the fundamental physical constants...
2.
Sandel B, Broadfoot A, Shemansky D
Appl Opt
. 2010 Feb;
16(5):1435-7.
PMID: 20168714
We have investigated the manner in which the gain of a microchannel plate (MCP) changes as the plate is operated at moderate output currents. We find that the total charge...
3.
Hord C, Barth C, Esposito L, McClintock W, Pryor W, Simmons K, et al.
Science
. 1991 Sep;
253(5027):1548-50.
PMID: 17784100
The Galileo Extreme Ultraviolet Spectrometer obtained a spectrum of Venus atmospheric emissions in the 55.0- to 125.0-nanometer (nm) wavelength region. Emissions of helium (58.4 nm), ionized atomic oxygen (83.4 nm),...
4.
Schneider N, Trauger J, Wilson J, Brown D, Evans R, Shemansky D
Science
. 1991 Sep;
253(5026):1394-7.
PMID: 17793479
Neutral sodium emissions encircling Jupiter exhibit an intricate and variable structure that is well matched by a simple loss process from Io's atmosphere. These observations imply that fast neutral sodium...
5.
Broadfoot A, Atreya S, Bertaux J, Blamont J, Dessler A, Donahue T, et al.
Science
. 1989 Dec;
246(4936):1459-66.
PMID: 17756000
Results from the occultation of the sun by Neptune imply a temperature of 750 +/- 150 kelvins in the upper levels of the atmosphere (composed mostly of atomic and molecular...
6.
Broadfoot A, HERBERT F, Holberg J, Hunten D, Kumar S, Sandel B, et al.
Science
. 1986 Jul;
233(4759):74-9.
PMID: 17812892
Data from solar and stellar occultations of Uranus indicate a temperature of about 750 kelvins in the upper levels of the atmosphere (composed mostly of atomic and molecular hydrogen) and...
7.
Sandel B, Shemansky D, Broadfoot A, Holberg J, Smith G, McConnell J, et al.
Science
. 1982 Jan;
215(4532):548-53.
PMID: 17771276
Combined analysis of helium (584 angstroms) airglow and the atmospheric occultations of the star delta Scorpii imply a vertical mixing parameter in Saturn's upper atmosphere of K (eddy diffusion coefficient)...
8.
Broadfoot A, Sandel B, Shemansky D, Holberg J, Smith G, Strobel D, et al.
Science
. 1981 Apr;
212(4491):206-11.
PMID: 17783831
The global hydrogen Lyman alpha, helium (584 angstroms), and molecular hydrogen band emissions from Saturn are qualitatively similar to those of Jupiter, but the Saturn observations emphasize that the H(2)...
9.
Sandel B, Shemansky D, Broadfoot A, Bertaux J, Blamont J, Belton M, et al.
Science
. 1979 Nov;
206(4421):962-6.
PMID: 17733915
Extreme ultraviolet spectral observations of the Jovian planetary system made during the Voyager 2 encounter have extended our knowledge of many of the phenomena and physical processes discovered by the...
10.
Broadfoot A, Belton M, Takacs P, Sandel B, Shemansky D, Holberg J, et al.
Science
. 1979 Jun;
204(4396):979-82.
PMID: 17800434
Observations of the optical extreme ultraviolet spectrum of the Jupiter planetary system during the Voyager 1 encounter have revealed previously undetected physical processes of significant proportions. Bright emission lines of...