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Propagation of the Heaviest UH-Cosmic Ray Nuclei

Waddington, I. and Cummings, J. R. and Garrard, T. L. and Hink, P. and Nilsen, B. S. (1997) Propagation of the Heaviest UH-Cosmic Ray Nuclei. In: Proceedings of the 25th International Cosmic Ray Conference. Vol.4. Potchefstroom University, Space Research Unit , Transvaal, South Africa, pp. 345-348.

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Our previous studies showed that the fragmentation cross sections of gold nuclei interacting in hydrogen have large variations between the values measured at 0.9 and 10.6 GeV/n, which has very significant implications on calculations of the propagation of the heaviest UH cosmic ray nuclei, such as Pb and Pt We have now completed a series of runs at the Brookhaven AGS using beams of gold nuclei of intermediate energy. The data from these runs will allow us to establish the excitation functions for these cross sections in a wide range of targets and hence model propagation more accurately than hitherto. In addition we will be able to study the energy dependence of nuclear charge pickup, electromagnetic dissociation and fission. Beams of gold nuclei with seven energies between 4.0 and 0.9 Ge V /n were studied interacting in targets ranging in mass from hydrogen to lead. We will present data on the cross sections derived from several of these beams and discuss some of the implications.

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Additional Information:© Space Research Unit. Provided by the NASA Astrophysics Data System. This work partially supponed by NASA under Grants NASA/NAGW-3014 and 5-5077. We are indebted to Joe Klarmann and David Lawrence of Washington U for assistance, and to the staff of the AGS for generous exposures and exceptional help during the Great Blizzard of '96.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1997-14
Record Number:CaltechAUTHORS:20140717-154827635
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47309
Deposited By: Deborah Miles
Deposited On:27 Jul 2014 19:01
Last Modified:03 Oct 2019 06:52

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