Document Details
Title:
OPERATION SANDSTONE, SCI DIR REPORT OF ATOMIC WEAPON TESTS AT ENIWETOK, 1948; ANNEX 8--GAMMA RAY MEASUREMENTS: PARTS 1, II, III, IV, AND V (DELETED)
Author(s):
SHONKA, F R [LOS ALAMOS SCIENTIFIC LABORATORY]; PAWLICKI, G S [LOS ALAMOS SCIENTIFIC LABORATORY]
Subject Terms:
SANDSTONE OPERATION; X-RAY EVENT; YOKE EVENT; ZEBRA EVENT; GAMMA RADIATION; RADIATION MONITORING; RADIATION DETECTION; ABSORPTION
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:
Declassification Status:
Sanitized
Document Pages:
0246
Accession Number:
NV0051073
Document Number(s):
SANDSTONE29EX
Originating Research Org.:
LOS ALAMOS SCIENTIFIC LABORATORY
OpenNet Entry Date:
1994 Aug 26
OpenNet Modified Date:
2003 Sep 18
Description/Abstract:
CURVES OF ABSORPTION OF GAMMA RAYS IN BORON CARBIDE AND A FEW POINTS O N THE ABSORPTION CURVE IN LEAD WERE OBTAINED DURING THE THREE ATOMIC E XPLOSIONS OF OPERATION SANDSTONE. RADIATION WAS DETECTED BY INTEGRATI NG IONIZATION CHAMBERS AND BY PHOTOGRAPHIC EMULSIONS. A FEW RECORDING -TYPE IONIZATION CHAMBERS WERE USED TO GIVE INTENSITIES AS A FUNCTION OF TIME. RADIATION DETECTORS WERE LOCATED INSIDE OF SHELTERS WHICH PR OTECTED THEM FROM BLAST AND SHIELDED THEM FROM SCATTERED RADIATION. T UBES THROUGH THE WALLS OF THESE SHELTERS WHICH FACED THE ZERO TOWERS S ERVED AS COLLIMATORS. SOME OF THESE TUBES WERE AIMED AT THE CABS ATOP THE ZERO TOWERS AND OTHERS WERE DIRECTED AT SEVERAL ANGLES OF ELEVATI ON ABOVE THE CABS. TO GET THE ABSORPTION CURVE AT A GIVEN ANGLE OF EL EVATION, DIFFERENT THICKNESSES OF ABSORBER WERE LOADED INTO THE COLLIM ATING TUBES AT THAT ANGLE, AND THE OBSERVED INTENSITY OF RADIATION TOG ETHER WITH THE ABSORBER THICKNESS IN A GIVEN BEAM DEFINED A POINT ON T HE ABSORPTION CURVE. INTENSITY MEASUREMENTS WERE TAKEN AT A POSITION SEVERAL FEET FROM ABSORBERS IN ORDER TO MINIMIZE THE GEOMETRY FOR RADI ATION SCATTERED BY THE ABSORBER. BECAUSE OF GEOMETRY, SCATTERED RADIA TION WAS NEGLIGIBLE AND THE ANALYSIS OF ABSORPTION CURVES YIELDS THE T RUE TOTAL ABSORPTION COEFFICIENT FOR THE RADIATION.