Ar-37 and Ar-39 in meteorites and the spatial cosmic ray gradient

Details Ar-37 and Ar-39 in meteorites and the spatial cosmic ray gradient Ar-37 and Ar-39 in meteorites and the spatial cosmic ray gradient

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..33..420h&link_type=abstract

Earth and Planetary Science Letters, vol. 33, no. 3, Jan. 1977, p. 420-427.

Computer Science

Argon Isotopes, Cosmic Rays, Meteoritic Composition, Stony Meteorites, Abundance, Histograms, Iron, Nickel, Pribram Meteorite

Scientific paper

Cosmic-ray-produced Ar-37 and Ar-39 in the Fe-Ni phase of meteorites are studied in connection with their implications for the radial gradient of cosmic-ray particles. For the Canon City chondrite, about 20.1 dpm/kg FeNi of Ar-37 and about 22.5 dpm/kg FeNi of Ar-39 are found. Although the Ar-37/Ar-39 ratio is usually employed to deduce a spatial gradient, previously reported Ar-37 data are inconsistent because they fluctuate much more than could be accounted for by different orbits and because the anticipated correlation with cosmic-ray neutron detections is quite weak. As a result, the Ar-37/Ar-39-derived gradient has a low confidence level, but Ar-39 activities group close to a mean value of 22.5 dpm/kg FeNi and appear to be almost independent of the different meteoroid orbits. A comparison of Ar-39 activities in meteorites with those calculated for orbits obtained from fireball data shows that a gradient of 10% per AU or less can be reconciled with the experimental findings.

Affiliated with

Also associated with

No associations

Rating

Ar-37 and Ar-39 in meteorites and the spatial cosmic ray gradient 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 Ar-37 and Ar-39 in meteorites and the spatial cosmic ray gradient, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ar-37 and Ar-39 in meteorites and the spatial cosmic ray gradient will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-952081