18,052 research outputs found
Consistency of spectroscopic factors from (e,e'p) reactions at different momentum transfers
The possibility to extract relevant information on spectroscopic factors from
(e,ep) reactions at high is studied. Recent O(e,ep) data
at (GeV/ are compared to a theoretical approach which
includes an eikonal description of the final-state interaction of the proton, a
microscopic nuclear matter calculation of the damping of this proton, and
high-quality quasihole wave functions for -shell nucleons in . Good agreement with the (GeV/ data is obtained when
spectroscopic factors are employed which are identical to those required to
describe earlier low experiments.Comment: 17 pages, 6 figures in .eps format, submitted to Phys. Rev.
Forebody and vertical stabilizer effects on directional stability of a reusable LOX/RP (061) booster AR 12161-2
Results are presented of a wind tunnel test on the directional stability of space shuttle booster configurations. The test was conducted at the 14-inch trisonic tunnel starting 6 December 1971 and continued through 11 December 1971 for a total of 66 occupancy hours. Configurations tested included a cylindrical body with two axisymmetrical noses, one with and without canopy, one delta wing, located in two positions, five vertical tails (including a V tail), two having split rudders, ventral fins, two sets of chines, three airbreathing engine pods, and rocket engine shrouds. The model scale was 0.003366
Mars: Seasonally variable radar reflectivity
Since reflectivity is a quantity characteristic of a given target at a particular geometry, the same (temporally unchanging) target examined by radar on different occasions should have the same reflectivity. Zisk and Mouginis-Mark noted that the average reflectivities in the Goldstone Mars data increased as the planet's S hemisphere passed from the late spring into early summer. The same data set was re-examined and the presence of the phenomenon of the apparent seasonal variability of radar reflectivity was confirmed. Two objections to these findings are addressed: (1) reflectivity variations may be present in the Goldstone Mars data as a result of an instrument/calibration error; and (2) the variations were introduced into the analysis through comparing reflectivities from two incompatible subsets of the data
Contaminants standards
Contaminant and toxic hazards during manned space flight
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