Accession Number:

AD0617178

Title:

SPECTROMETER MEASUREMENTS

Descriptive Note:

Corporate Author:

NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CA

Personal Author(s):

Report Date:

1958-01-27

Pagination or Media Count:

22.0

Abstract:

This experiment was performed to obtain data on the spectral distribution of the radiation emitted in a nuclear explosion as a function of altitude. The radiant power versus time was measured with a time resolution of 100 micro sec in 22 narrow spectral bands between 0.25 and 2.5 microns for the high altitude detonation and for the low altitude correlation shots. This was accomplished with vacuum phototubes and lead sulphide photoconductive cells, each sampling a different spectral region in the focal plane of a medium quartz Hilger spectrograph. The voltages produced by these detectors were recorded on two Ampex Model 306 magnetic-tape recorders. The spectral distribution at any given instant was obtained by plotting the radiant power per unit wavelength interval as measured by each of these detectors at that time. The spectral distribution is published in this report at the time of the first maximum and at the time of minimum for Shots 1 and 10 and at the time of the second maximum and at several later times for Shots 1, 9, and 10. These spectral distributions indicate that the radiation reaching earth from the high altitude detonation was concentrated more in the shorter wavelengths than for the correlation shots.

Subject Categories:

  • Surface-Launched Guided Missiles
  • Test Facilities, Equipment and Methods
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE