RADIATION ENHANCEMENT FOLLOWING JOHNSTON ISLAND THERMONUCLEAR EXPLOSION
An observation made at Hobart, Tasmania, of an enhancement in the counting rate of a balloon-borne Geiger courter at the time of the high-altitude thermonuciear explosion above Johnston Island on July 9, 1962, is reported. Significart features of the evert are the considerable atmospheric depth at which it was observed, the delay of between 20 and 30 sec between the instant of the expiosion and the commencement of the enhancement, and the peak intensity (averaged over 10-sec intervals) of about 50% above the normal background level near the Pfotzer maximum of the cosmic-ray transition curve. (L.T.W.)
- Research Organization:
- Univ. of Tasmania, Hobart, Australia
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-009010
- OSTI ID:
- 4734197
- Journal Information:
- Nature, Journal Name: Nature Vol. Vol: 196
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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