Operation Greenhouse: Scientific Director's Report. Annex 1.5. Neutron Measurements. Part 2. Spectrum and Air Attenuation Static Measurements. Section 2. Nuclear Explosions, 1951 (Sanitized Version
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Subject Categories: ATOMIC AND MOLECULAR PHYSICS AND SPECTROSCOPY
NUCLEAR PHYSICS & ELEMENTARY PARTICLE PHYSICS
Corporate Author: LOS ALAMOS SCIENTIFIC LAB ALBUQUERQUE NM
Title: Operation Greenhouse: Scientific Director's Report. Annex 1.5. Neutron
Measurements. Part 2. Spectrum and Air Attenuation Static Measurements. Section
2. Nuclear Explosions, 1951 (Sanitized Version).
Personal Authors: Allred, John C.; Phillips, Donald D.; Rosen, Louis
Report Date: 1951
Pages: 108 PAGES
Monitor Acronym: X0
Monitor Series: XD
Descriptors: *SPECTRA, *ATTENUATION, *NEUTRON SPECTRUM, *PROMPT NEUTRONS, TEST
AND EVALUATION, NUCLEAR EXPLOSIONS, MEASUREMENT, AIR, PHOTOGRAPHY, PHILOSOPHY,
GREENHOUSE EFFECT, MEAN FREE PATH, THERMONUCLEAR REACTIONS.
Abstract: A preliminary report on the photographic neutron experiment was
written Feb. 1, 1951. Since neither the philosophy of the experiment nor the
method of carrying it out underwent significant changes after January 1951, the
preliminary report is reproduced here as the first three chapters of this
report. Chapter 4 outlines the changes which were introduced as well as the
expanded objectives which dictated the nature of the most important of these
changes. The Greenhouse series of experiments involved four nuclear detonations.
These may be briefly described as follows neutron spectra generated in various
types of nuclear detonations with particular emphasis on the scheduled
thermonuclear tests. All measurements are to be made in collimated geometry and
at a number of distances from the various explosions, thus making possible
observations of essentially the prompt neutrons only, as well as a determination
of the mean free path of these neutrons in air as a function of their energy.
Mean-free-path determinations are essential if it is to be possible to deduce
the absolute number of neutrons, as a function of energy, emanating from a bomb.
It is fortunate for calculatory purposes that considerable data are already
available on the mean free path of neutrons in air over a reasonable region of
the energy spectrum under consideration.
Limitation Code: APPROVED FOR PUBLIC RELEASE
Source Code: 394961
Citation Creation Date: 01 SEP 1999