ANALYSIS OF STRATOSPHERIC STRONTIUM-90 MEASUREMENTS
Abstract
Various hypotheses advanced concerning the distribution of fall-out radioactivity in the stratosphere are reviewed. Estimated levels are compared with observed stratospheric concentrations. Project Ashcan, the program of the Atomic Energy Commission to measure the radioactive dust content or the stratosphere by means of balloon-borne filters, is discussed. The filters are analyzed for gross beta activity and for barium-140, zirconium-95, cerium-144, cesium-137, strontium-89, and strontium-90. Emphasis is placed on strontium-90 levels. An inspection of the data shows thai there is a large variability. This variability may be real and a measure of the true state of affairs in the stratosphere, or it may be a function ot thc collection or analysis techniques. Some of the variability is attributed to recent injections into the stratosphere. Problems of collection and comparisons of daia from theoretical and laboratory studies with data from collections made by aircraft and balloons are discussed. Data are tabulated from a series of measurements on filter efficiency. Data are included on the average concentration of debris in the stratosohere as a function of altitude and latitude for two six-month periods, January through June 1957 and January thnough June 1958. (C.H.)
- Authors:
- Publication Date:
- Research Org.:
- Weather Bureau, Washington, D.C.
- OSTI Identifier:
- 4225048
- Report Number(s):
- M-7090
- NSA Number:
- NSA-13-019074
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-59
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
- Subject:
- HEALTH AND SAFETY; AIRCRAFT; BALLOONS; BARIUM 140; BETA PARTICLES; CERIUM 144; CESIUM 137; DISTRIBUTION; DUSTS; EFFICIENCY; ERRORS; FALLOUT; FILTERS; MEASURED VALUES; RADIOACTIVITY; SAMPLING; STRATOSPHERE; STRONTIUM 89; STRONTIUM 90; TABLES; ZIRCONIUM 95
Citation Formats
Machta, L, and List, R J. ANALYSIS OF STRATOSPHERIC STRONTIUM-90 MEASUREMENTS. Country unknown/Code not available: N. p., 1959.
Web.
Machta, L, & List, R J. ANALYSIS OF STRATOSPHERIC STRONTIUM-90 MEASUREMENTS. Country unknown/Code not available.
Machta, L, and List, R J. 1959.
"ANALYSIS OF STRATOSPHERIC STRONTIUM-90 MEASUREMENTS". Country unknown/Code not available.
@article{osti_4225048,
title = {ANALYSIS OF STRATOSPHERIC STRONTIUM-90 MEASUREMENTS},
author = {Machta, L and List, R J},
abstractNote = {Various hypotheses advanced concerning the distribution of fall-out radioactivity in the stratosphere are reviewed. Estimated levels are compared with observed stratospheric concentrations. Project Ashcan, the program of the Atomic Energy Commission to measure the radioactive dust content or the stratosphere by means of balloon-borne filters, is discussed. The filters are analyzed for gross beta activity and for barium-140, zirconium-95, cerium-144, cesium-137, strontium-89, and strontium-90. Emphasis is placed on strontium-90 levels. An inspection of the data shows thai there is a large variability. This variability may be real and a measure of the true state of affairs in the stratosphere, or it may be a function ot thc collection or analysis techniques. Some of the variability is attributed to recent injections into the stratosphere. Problems of collection and comparisons of daia from theoretical and laboratory studies with data from collections made by aircraft and balloons are discussed. Data are tabulated from a series of measurements on filter efficiency. Data are included on the average concentration of debris in the stratosohere as a function of altitude and latitude for two six-month periods, January through June 1957 and January thnough June 1958. (C.H.)},
doi = {},
url = {https://www.osti.gov/biblio/4225048},
journal = {},
number = ,
volume = ,
place = {Country unknown/Code not available},
year = {Sun Mar 01 00:00:00 EST 1959},
month = {Sun Mar 01 00:00:00 EST 1959}
}