Analysis of Airborne Radioactivity in Japan due to Nuclear Testings

Journal Article · Sat Dec 31 23:00:00 EST 1960 · Nippon Genshiryoku Gakkai-Shi

DOI:https://doi.org/10.3327/jaesj.3.711· OSTI ID:4832493

AOKI, Ryozo

The level of surface airborne radioactivty in Tokyo, Japan, during April 1959 to June 196l was investigated. In spring l961 and 1960, a maximum peak of aetivity was detected with an increase of 4 to 5 times of the background. The half elimination time of the storage above tropopause is estimated about 300 to 400 days. From the gamma -spectrum of the sample collected in Mar. l959, Ce/sup 144/-Pr/sup 144/, Ru/sup 106/stimated. From the lected during Feb. to July 1960, Ce/sup 144/-Pr/sup 144/, Ru/sup 106-Rh/sup 106/, cribed well-type scintillator was taken into consideration in estimating the crystal peak efficiency for gamma -spectrum assaying.

• Research Organization: Hitachi Central Lab., Tokyo
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-003297
• OSTI ID: 4832493
• Journal Information: Nippon Genshiryoku Gakkai-Shi, Journal Name: Nippon Genshiryoku Gakkai-Shi Journal Issue: 9 Vol. 3; ISSN 0004-7120
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ATMOSPHERE
BARIUM 137
CERIUM 144
CESIUM 137
CRYSTALS
DETECTION
EFFICIENCY
GAMMA SPECTROMETERS
HALF-LIFE
HEALTH AND SAFETY
JAPAN
NIOBIUM 95
NUCLEAR EXPLOSIONS
PROMETHIUM 144
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RADIATION DOSES
RADIOACTIVITY
RHODIUM 106
RUTHENIUM 106
SAMPLING
SCINTILLATION COUNTERS
SENSITIVITY
STORAGE