Document Details


Title:
ACCURACY + SENSITIVITY OF FILM MEASUREMENTS OF GAMMA RADIATION-PART I ( HEALTH PHYSICS, VOL. 9, P. 453-461, RECEIVED: 8/6/62, REVISED: 11/29/62 )
Author(s):
BRODSKY, A [UNIVERSITY OF PITTSBURGH]; KATHREN, R L [UNIVERSITY OF PITTSBURGH]
Subject Terms:
PHOTOGRAPHIC FILMS; RESEARCH PROGRAMS; RADIATION DOSES; DATA; CALCULATION METHODS; GRAPHS; RADIATION EFFECTS; SENSITIVITY; AIR
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
JOURNAL ARTICLE
Publication Date:
1962 Nov 29
Declassification Status:
Never classified
Document Pages:
0028
Accession Number:
NV0067299
Originating Research Org.:
HEALTH PHYSICS
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
EXPERIMENTS HAVE BEEN PERFORMED TO DETERMINE THE INHERENT VARIATIONS I N FILM MEASUREMENTS OF GAMMA RADIATION FOR SEVERAL TEMPERATURES AND HU MIDITIES AND FOR WEEKLY, BI-WEEKLY, 4-WEEKLY, 6-WEEKLY AND 12-WEEK REP LACEMENT INTERVALS. RESULTS SHOW THAT THE WEEKLY REPLACEMENT INTERVAL PRODUCES THE MOST PRECISE EVALUATION OF CUMULATIVE 12-WEEK EXPOSURES FOR UNPROTECTED PACKETS, PROVIDED THAT LOW DENSITIES AND DOSE ASSIGNM ENTS ARE RECORDED AS READ AND WEEKLY DOSE ASSIGNMENTS ARE PICKED FROM CALIBRATION CURVES PLOTTED FROM FILMS DEVELOPED ALONG WITH THE CORRES PONDING BATCHES. BI-WEEKLY FILMS GIVE QUARTERLY DOSE ESTIMATES THAT MA Y BE LOW BY 30 PER CENT, SHOWING THE INCREASING EFFECTS OF LATENT IMAG E FADING AFTER THE FIRST WEEK, PARTICULARLY AT HIGH HUMIDITIES. HUMIDI TY DEPENDENCE AND TEMPERATURE DEPENDENCE WERE FOUND TO BE INTERRELATED , AND AN INCREASED FOGGING WAS NOTED FOR THE 12-WEEK FILMS, WHICH PRED OMINATED OVER THE FADING EFFECT, AND WHICH WAS MORE PRONOUNCED AT THE HIGHER TEMPERATURE. UNPROTECTED FILMS EXPOSED FOR PERIODS LONGER THAN TWO WEEKS WERE GENERALLY FOUND TO GIVE UNRELIABLE MEASUREMENTS.


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