METHOD FOR PREPARING LOW-ACTIVITY POLONIUM /cap alpha/-RAY SOURCES

Journal Article · Sun Apr 01 04:00:00 EST 1962 · Atomnaya Energ.

OSTI ID:4830000

Plaksin, I N; Deev, Yu S; Starchik, L P

Preparation of low-activity alpha sources by electrochemical or sublimation techniques usually presents serious experimental problems. In order to overcome these difficulties, a Po source was prepared by making use of the recoil of Po/sup 210/; a low-activity alpha -emitting preparation is formed by precipitating the Po atoms onto a supporting surface. As the number of Po atoms removed from the material is proportional to the time if the time is kept sufficiently short in comparison with the half life of the material, the specific activity of the new source is a function of the time of contact between the original preparation and the suppurting plate. The recoil atoms leaving the surface lose their electrons because of ionization and interaction with molecules and electrical methods may be used. Thus, a 100 v/mm charge was applied, using the supporting plate as the negative electrode. This method increased the rate of deposition by a factor of much more than 10, making it possible to prepare even high-activity sources within relatively short time periods. (TTT)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-019485
• OSTI ID: 4830000
• Journal Information: Atomnaya Energ., Journal Name: Atomnaya Energ. Vol. Vol: 12
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALPHA PARTICLES
ALPHA SOURCES
ELECTRIC FIELDS
ELECTRODEPOSITION
ELECTRODES
HALF-LIFE
INTERACTIONS
IONIZATION
MOLECULES
PARTICLE SOURCES
PHYSICS
PLATES
POLONIUM
POLONIUM 210
PRECIPITATION
PREPARATION
RADIOACTIVITY
RECOILS