Accession Number:

AD0477432

Title:

SPATIAL DISTRIBUTION AND TIME DECAY OF THE INTENSITIES OF GEOMAGNETICALLY TRAPPED ELECTRONS FROM THE HIGH ALTITUDE NUCLEAR BURST OF JULY 1962

Descriptive Note:

Corporate Author:

IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY

Personal Author(s):

Report Date:

1965-12-01

Pagination or Media Count:

40.0

Abstract:

A one-year observational study of the artificial radiation belt produced by the nuclear burst Starfish on 9 July 1962 is reported. It is estimated that 1.3 x 10 to the 25th power electrons from radioactive fission products, or some 2.6 of the total yield, were presented in geomagnetically trapped orbits at 10 hours after the burst. These electrons disappeared in the manner expected from the atmospheric loss theory of Walt for values of the magnetic shell parameter L 1.25 earth radii. At increasing values of L the rate of disappearance was progressively more rapid than expected by this theory. The maximum observed value of the apparent mean lifetime of approx. 2 MeV electrons in the time range 4000 delta t 10,000 hours was 2 years at L 1. 5. About 15 of the initially injected electrons or 0.4 of 1 of the total survived the first 5-12 months, about 10 the first year. Detailed spatial distribution and temporal data are given in a series of plots. Author

Subject Categories:

  • Atmospheric Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE