Ulysses HET Measurements of Electron-capture Secondary Isotopes: Testing the Role of Cosmic Ray Reacceleration

Details Ulysses HET Measurements of Electron-capture Secondary Isotopes: Testing the Role of Cosmic Ray Reacceleration Ulysses HET Measurements of Electron-capture Secondary Isotopes: Testing the Role of Cosmic Ray Reacceleration

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....3...33c&link_type=abstract

Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o

Physics

Scientific paper

In recent publications, we have reported consistent cosmic ray Galactic confinement times from Ulysses HET measurements of 10Be, 26Al and 36Cl. The abundances of other secondary radio-isotopes, specifically electron-capture isotopes such as 49V and 51Cr, are a crucial test of cosmic ray reacceleration. Reacceleration is implicit in interstellar shock or MHD acceleration models, but its significance for interstellar propagation is largely unknown. Electron-capture is suppressed during interstellar propagation. However, if cosmic rays experience significant reacceleration, nuclei will have spent time at lower energies where electron pick-up, and hence electron capture, is more likely than at higher energies. Thus, electron capture secondary isotopes would be less abundant (and their daughters, more abundant) than otherwise predicted. We show that the abundance ratio of 49V to 51V is a particularly sensitive test of this effect. For the first time in the literature we present evidence of reacceleration using Ulysses High Energy Telescope (HET) data.

Affiliated with

Also associated with

No associations

Rating

Ulysses HET Measurements of Electron-capture Secondary Isotopes: Testing the Role of Cosmic Ray Reacceleration 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 Ulysses HET Measurements of Electron-capture Secondary Isotopes: Testing the Role of Cosmic Ray Reacceleration, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ulysses HET Measurements of Electron-capture Secondary Isotopes: Testing the Role of Cosmic Ray Reacceleration will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1267669