A cosmic-ray age based on the abundance of Be-10

Details A cosmic-ray age based on the abundance of Be-10 A cosmic-ray age based on the abundance of Be-10

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239l.139w&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 239, Aug. 1, 1980, p. L139-L142.

Astronomy and Astrophysics

Astrophysics

58

Abundance, Beryllium 10, Cosmic Rays, Milky Way Galaxy, Radioactive Age Determination, Satellite-Borne Instruments, Beryllium 7, Beryllium 9, Gas Density, High Resolution, International Sun Earth Explorer 3, Interstellar Gas, Mathematical Models, Wave Propagation

Scientific paper

The paper discusses a measurement of the isotopic composition of galactic cosmic-ray beryllium made with high resolution aboard the ISEE 3 spacecraft. The isotope fractions of Be-7, Be-9, and Be-10 were determined; the abundance of the radioactive isotope Be-10 is used to deduce the cosmic-ray confinement time of 8,400,000/yr and an interstellar gas density of 0.33 atoms/cu cm in the confinement volume. Errors in the propagation model parameters which result in comparable uncertainties are discussed.

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