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Title:
ACUTE MORTALITY AND RECOVERY STUDIES IN SHEEP IRRADIATED WITH COLBALT-60 GAMMA OR 1 MVP X-RAYS
Subject Terms:
SHEEP; COBALT 60; RADIATION DOSES; DEATH; RESEARCH PROGRAMS; IRRADIATION; DOSE-RESPONSE RELATIONSHIPS; BIOLOGICAL EFFECTS; EARLY RADIATION EFFECTS; RADIATION INJURIES
Document Location:
Location - DOE/NNSA 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 - NTA@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1965 Aug 12
Declassification Status:
Never classified
Document Pages:
0027
Accession Number:
NV0008150
Document Number(s):
USNRDLTR854
Originating Research Org.:
UNITED STATES NAVAL RADIOLOGICAL DEFENSE LABORATOR
OpenNet Entry Date:
1994 Aug 26
OpenNet Modified Date:
2023 Jun 29
Description/Abstract:
THE ACUTE LD-50 HAS BEEN DETERMINED FOR THE DOMESTIC SHEEP IRRADIATED AT 11.0 R/MIN. WITH CO-60 GAMMA AND AT 7.5 R/MIN. WITH 1 MVP X RAYS. IT WAS FOUND THAT MORE THAN 10 OF THE DEATHS OCCURRED AFTER 60 DAYS, INDICATING THAT THE LD-50/60 IS A MORE ACCURATE EXPRESSION OF THE RADI ATION LETHALITY OF THE DOMESTIC SHEEP THAN THE LD-50/30. THE RESPECTI VE MIDLINE AIR DOSE LD-50/60'S ARE 237 AND 251 R. MEAN SURVIVAL TIMES WERE DOSE DEPENDENT, VARYING INVERSELY FROM 17-36 DAYS WITH INCREASIN G DOSE. RESIDUAL INJURY HAS BEEN DETERMINED BY RE-IRRADIATION 30 DAYS AFTER GIVING TWO-THIRDS OF THE LD-50/30 DOSE FOR BOTH RADIATION SOURC ES. THESE DATA THAT INDICATE 60-70 RECOVERY HAS OCCURRED IN 30 DAYS.


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