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Record Details

Record 43 of 4976
Measurements of the cosmic-ray Be/B ratio and the age of cosmic rays
Author and Affiliation:
Brown, J. W.
Stone, E. C.
Vogt, R. E.(California Institute of Technology, Pasadena, Calif., United States)
Abstract: The ratio Be/B depends on whether the confinement time of cosmic rays in the Galaxy is long or short compared to the radioactive half-life of Be-10. We report observations of this ratio which were obtained with a dE/dx-Cerenkov detector launched into a polar orbit on OGO-6 as part of the Caltech Solar and Galactic Cosmic Ray Experiment. Be/B ratios were determined for various rigidity thresholds up to 15 GV. We find no statistically significant rigidity dependence of the ratio, which is 0.41 plus or minus 0.02 when averaged over all observed cutoffs. Additional calculations suggest that if the present fragmentation parameters are correct, then the lifetime of cosmic rays in the Galaxy is less then 10 m.y.
Publication Date: Jan 01, 1974
Document ID:
19740047437
(Acquired Dec 04, 1995)
Accession Number: 74A30187
Subject Category: SPACE RADIATION
Document Type: Conference Proceedings
Publication Information: (SEE A74-30143 13-29)
Publisher Information: United States
Meeting Information: International Cosmic Ray Conference; 13th; August 17-30, 1973; Denver, CO
Contract/Grant/Task Num: NAS5-9312; NGR-05-002-160
Financial Sponsor: NASA; United States
Description: 6p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: BERYLLIUM; BORON; CHRONOLOGY; COSMIC RAYS; CERENKOV COUNTERS; MEAN FREE PATH; OGO-6; SATELLITE-BORNE INSTRUMENTS; SPACEBORNE TELESCOPES
Imprint And Other Notes: In: International Cosmic Ray Conference, 13th, Denver, Colo., August 17-30, 1973, Proceedings. Volume 1. (A74-30143 13-29) Denver, University of Denver, 1974, p. 484-489. NSF-supported research;
Availability Source: Other Sources
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