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Global Representation of the Cross Sections for the Production of Fragments of UH Nuclei

Cummings, J. R. and Garrard, T. L. and Israel, M. H. and Klarmann, J. and Stone, E. C. and Waddington, C. J. and Binns, W. R. (1990) Global Representation of the Cross Sections for the Production of Fragments of UH Nuclei. In: Proceedings of the 21st International Cosmic Ray Conference. Vol.3. University of Adelaide , Northfield, South Australia, pp. 417-419. http://resolver.caltech.edu/CaltechAUTHORS:20140507-142235633

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Abstract

We have examined the fragmentation of relativistic iron, lanthanum, holmium and gold nuclei with energies between 500 and 1200 MeV/n incident on targets of polyethylene, carbon, aluminum, copper and lead. We have determined 1,256 elemental partial cross sections for the production of fragments from interactions in pure target materials. Deduced values have been found for another 417 cross sections in a hydrogen medium. The dependencies of these cross sections on energy, mass and charge have been studied. We have generated a seven parameter global fit to the cross sections for the heavy targets which fits a significant range of the data with a standard deviation of 7%. We have also generated a similar global fit to the cross sections for the hydrogen target which fits a slightly smaller range of the data with a standard deviation of 10%. These representations show that weak factorization can apply, but slightly better fits can be obtained without it. The mean mass losses observed for fragments that have lost a few protons, show that typically three or more neutrons are lost with each proton, producing fragment nuclei that must be highly proton rich, and consequently very unstable


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/abs/1990ICRC....3..416CADSArticle
Additional Information:© Organizing Committee of the 21st Int. Cosmic Ray Conf. Provided by the NASA Astrophysics Data System. We thank the staff at LBL, especially Hank Crawford, Jack Engelage, Mel Flores and Fred Lothrop for their help. This work was partially supported by NASA Grants NAG 8-498, -500, -502 and NGR 05-002-160, 24-005-050 and 26-008-001.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAG8-498
NASANAG8-500
NASANAG8-502
NASANGR 05-002-160
NASANGR 24-005-050
NASANGR 26-008-001
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1989-08
Record Number:CaltechAUTHORS:20140507-142235633
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140507-142235633
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45586
Collection:CaltechAUTHORS
Deposited By: Joy Painter
Deposited On:07 May 2014 21:38
Last Modified:07 May 2014 21:38

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