RADIOACTIVE FALLOUT IN CRIMEA DURING 1960-61

Journal Article · Sun Sep 01 04:00:00 EDT 1963 · At. Energ. (USSR)

OSTI ID:4128775

Belyaev, L I; Gedeonov, L I; Gritchenko, Z G; Maksimova, A M; Shvedov, V P; Yakovleva, G V

Daily radioactive fallout measurements were carried out during 1961 and 1962 in the vicinity of Simeiz. The samples were collected on a 1 m/sup 2/ surface metallic recipient. The fission product buildup was derived from absolute BETA -activity measurements. It was found that the fission-product ac tivity remained constant at about 0.1 C/km/sup 2/, except during February 1960 when it rose suddenly to 0.4 C/km/sup 2/. The constancy of the values is due to the temporary suspension of the bomb tests during the period; the increase was caused by the explosion of the French atomic bomb in the Sahara on February 13, 1960. Some of the samples collected were analyzed by scintillation gamma counters provided with NaI(Tl) and CsI(Tl) crystals. From the values of the Ru/ sup 103/ and (Zr + Nb)/sup 95/ photopeaks of the specimens collected after the Sahara explosion it was concluded that Pu/sup 239/ was used in the French bomb. The dose calculated at the Simeiz region attributable to the products of this explosion amounted to 0.82 mr for 1960. The Cs/sup 137/ and Sr/sup 90/ concentrations were found to change exponentially with a decay half life of 20 and 19 months, respectively. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-18-004031
• OSTI ID: 4128775
• Journal Information: At. Energ. (USSR), Journal Name: At. Energ. (USSR) Vol. Vol: 15
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACTIVATION
BETA PARTICLES
CESIUM 137
CESIUM IODIDES
CRYSTALS
DECAY
ENRICHMENT
FALLOUT
FISSION PRODUCTS
HALF-LIFE
HEALTH AND SAFETY
MEASURED VALUES
METALS
NIOBIUM 95
NUCLEAR EXPLOSIONS
NUMERICALS
PLUTONIUM 239
RADIATION DOSES
RADIOACTIVITY
RUTHENIUM 103
SCINTILLATION COUNTERS
SODIUM IODIDES
SURFACES
THALLIUM ISOTOPES
ZIRCONIUM 95