Cosmic ray isotope abundances from chromium to nickel

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

16

Abundance, Chromium Isotopes, Cosmic Rays, Nickel Isotopes, Balloon-Borne Instruments, Nuclear Fusion, Particle Telescopes, Solar System

Scientific paper

IRIS, a telescope consisting of a large-area precision Cerenkov detector, scintillators, spark chambers, and a passive stack of Lexan polycarbonate track detectors, was exposed to the primary cosmic radiation for 6.6 sq m sr hr in a balloon flight in 1976. This measurement has yielded the isotopic composition of the iron-group elements Cr, Mn, Fe, and Ni with an average mass resolution of 0.65 amu for the energies 320-500 MeV per amu at the detector. This experiment places the most severe constraints to date on deviation from solar-system composition of the source of the cosmic radiation. Upper limits of 10 percent are placed on the ratios Fe-54/Fe-56 and Fe-58/Fe-56, which are inconsistent with large departures from solar system source composition reported by other workers. The isotopic measurements of Fe and Ni preclude the possibility that these cosmic rays were produced in a single e-process zone. The mean mass of Mn is less than 55, indicating the presence of electron-capture species produced by spallation.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Cosmic ray isotope abundances from chromium to nickel 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 Cosmic ray isotope abundances from chromium to nickel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic ray isotope abundances from chromium to nickel will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1775766

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.