THE H$sup 3$ AND Ar$sup 39$ IN IRON METEORITES

Journal Article · Fri Jan 01 04:00:00 EST 1960 · Radiokhimiya (U.S.S.R.) For English translation see Sov. Radiochem. (Engl. Transl.)

OSTI ID:4111263

Levskii, L K

The tritium and Ar/sup 39/ activity in the iron meteorite Sikhote-Alin (which fell Feb. 1947) was found to be 2.4 x 10/sup -2/ and 5.7 x 10/sup -3/ decays per gram per minute, respectively. On the basis of the measured activity and the content of Ar/sup 38/ in the meteorite, the irradiation time of Sikhote- Alin was calculated as 430 x 10/sup 6/ years. (R.V.J.) detonation are compared. (auth)3292 The facts revealed by ground and upper atmosphere investigations are reviewed. The magnetic field is briefly discuesed, and it is stated that variations in the magnetic field are produced by large electric currents in regions of high conductivity at ionospheric heights of 100 to 300 km. The regular part of these variations is produced by the dynamo action of the sun and moon gravitational fields, while the irregular part is produced by solar corpuscles. Factors determining the electric conductivity of the upper atmosphere are discussed. The refraction pcwer of the ionosphere for radio waves is also discussed. Knowledge of the atmosphere at altitudes above 500 km is almost nil, but some estimates on the nature of the nearer space are offered. From observations on zodiacal light, whistler propagation, and satellite retardation, it appears that the earth moves inside the outskirts of the solar corona and that, moving toward the sun, the density decreases to a minimum of approximately lO/sup 3/ molecules/cm/sup 3/ at a distance of 5 to 10 earth radii and then increases again toward the sun. The effects of solar corpuscles (sweeping out cavities in the interstellar magnetic field in which cosmic rays may be trapped and forming a ring currert at 5 earth radii from the earth) are treated. It is concluded that the only serious obstacle to interplanetary travel is the neceesity of using very high frequencies in communication systems because of the refraction of radio waves of long wavelength in the ionosphere. (D.L.C.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-15-003291
• OSTI ID: 4111263
• Journal Information: Radiokhimiya (U.S.S.R.) For English translation see Sov. Radiochem. (Engl. Transl.), Journal Name: Radiokhimiya (U.S.S.R.) For English translation see Sov. Radiochem. (Engl. Transl.) Vol. Vol: 2; ISSN RADKA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACTIVATION
ARGON
DECAY
HYDROGEN
IRON
MEASURED VALUES
METEORITES
PHYSICS
TRITIUM
USSR