Physics
Scientific paper
Dec 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.294..518m&link_type=abstract
Nature, vol. 294, Dec. 10, 1981, p. 518, 519.
Physics
1
Abundance, Cosmic Rays, Interstellar Matter, Isotopes, Solar System, Chemical Elements, International Sun Earth Explorer 3, Nuclear Fusion
Scientific paper
Possible origins for cosmic rays are reviewed, noting that samples of every element of the periodic table have been detected in cosmic rays. Differences in cosmic ray elemental and isotopic abundances from solar system and interstellar matter abundances have been examined. Studies of relative abundances of atomic nuclei between numbers 26 and 40, based on high-resolution data from the ISEE-3 spacecraft, revealed a cosmic ray neutron-rich isotope ratio 1.6 times that of the solar system ratios. Spectroscopic examinations of interstellar clouds have revealed Si-29 and Si-30 enhancements, similar to cosmic ray abundances. Measurements of the chemical abundance distributions of rare ultraheavy elements on the HEAO-3 and Ariel 6 spacecraft yielded results consistent with r-process nucleosynthesis, similar to solar system material. More accurate measurements, including isotopic ratios of the ultraheavy elements, are recommended.
No associations
LandOfFree
Clues for the origin of cosmic rays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Clues for the origin of cosmic rays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clues for the origin of cosmic rays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1264808