Production Cross Sections of Fragments from Beams of 400-650 MeV per Nucleon ^9Be, ^11B, ^12C, ^14N, ^15N, ^16O, ^20Ne, ^22Ne, ^56Fe, and ^58Ni Nuclei Interacting in a Liquid Hydrogen Target. II. Isotopic Cross Sections of Fragments

Details Production Cross Sections of Fragments from Beams of 400-650 MeV per Nucleon ^9Be, ^11B, ^12C, ^14N, ^15N, ^16O, ^20Ne, ^22Ne, ^56Fe, and ^58Ni Nuclei Interacting in a Liquid Hydrogen Target. II. Isotopic Cross Sections of Fragments Production Cross Sections of Fragments from Beams of 400-650 MeV per Nucleon ^9Be, ^11B, ^12C, ^14N, ^15N, ^16O, ^20Ne, ^22Ne, ^56Fe, and ^58Ni Nuclei Interacting in a Liquid Hydrogen Target. II. Isotopic Cross Sections of Fragments

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...508..949w&link_type=abstract

The Astrophysical Journal, Volume 508, Issue 2, pp. 949-958.

Astronomy and Astrophysics

Astronomy

24

Atomic Processes, Ism: Cosmic Rays, Methods: Laboratory

Scientific paper

We have measured the isotopic cross sections of 130 secondary fragmentation isotopes from 10 different beam nuclei from ^9Be to ^58Ni that were accelerated to between 400 and 650 MeV nucleon^-1 at the SATURNE Accelerator in France in 1993 and 1994. These beam nuclei interacted in a 1.52 g cm^-2 thick liquid hydrogen target, and the isotopic fragments were observed. This is the first use of a pure hydrogen target with a thickness approximating the amount of hydrogen traversed by cosmic rays in our Galaxy to measure cross sections. Several of the beam charges such as ^9Be, ^11B, ^15N, and ^22Ne have not had their fragmentation cross sections measured previously. The isotopic cross sections from the ^12C, ^14N, ^16O, ^20Ne, ^56Fe, and ^58Ni beam interactions are compared with earlier measurements by our group using a CH_2 - C target subtraction technique to determine the hydrogen cross sections. The overall agreement between the new measurements and the earlier measurements using a CH_2 - C target subtraction is excellent with a systematic consistency between measurements ~3%-5%. These new isotopic cross sections define the Galactic production of the secondary isotopes ^10Be, ^10B, ^11B, ^13C, ^14N, ^15N, and ^18O as well as Fe and Ni secondary decay isotopes from Cl to Co to a level of precision of ~3%-5%. These cosmic-ray isotopes are important for understanding the nucleosynthesis in the cosmic-ray sources as well as tracing the detailed propagation history of cosmic rays in the Galaxy.

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Production Cross Sections of Fragments from Beams of 400-650 MeV per Nucleon ^9Be, ^11B, ^12C, ^14N, ^15N, ^16O, ^20Ne, ^22Ne, ^56Fe, and ^58Ni Nuclei Interacting in a Liquid Hydrogen Target. II. Isotopic Cross Sections of Fragments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

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