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An Experiment to Measure the Elemental Abundances of Ultra-Heavy Cosmic Rays

Binns, W. R. and Hink, P. L. and Israel, M. H. and Mewaldt, R. A. and Garrard, T. L. and Leske, R. A. and Schindler, R. H. and Wiedenbeck, M. E. and Streitmatter, R. E. and Barbier, L. M. and Christian, E. R. and Mitchell, J. W. and Ormes, J. F. and Waddington, C. J. (1997) An Experiment to Measure the Elemental Abundances of Ultra-Heavy Cosmic Rays. In: Proceedings of the 25th International Cosmic Ray Conference. Vol.5. Potchefstroom University, Space Research Unit , Transvaal, South Africa, pp. 65-68.

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Measurements of the elemental abundances of galactic cosmic ray nuclei with charge 26≤z≤92 can provide important information that should help to resolve the question of cosmic-ray origin; i.e. whether cosmic rays originate from the acceleration of interstellar grain material or from preferential selection and acceleration of nuclei from stellar photosphere-chromosphere regions with T-10^4 based on first ionization potential. They will also refine tests of whether freshly synthesized rprocess material is a significant component in cosmic rays. The detector concept described utilizes an array of silicon detectors for dF/dx measurements, two Cherenkov counters with radiators of different refractive index for velocity determination (one using aerogel and one using a novel waveshifter readout approach), and scintillating fibers for a hodoscope/time-of-flight detector. The numbers of particles which can be collected with this approach and the expected charge resolution are discussed.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Binns, W. R.0000-0001-6110-3407
Israel, M. H.0000-0002-8104-208X
Mewaldt, R. A.0000-0003-2178-9111
Leske, R. A.0000-0002-0156-2414
Wiedenbeck, M. E.0000-0002-2825-3128
Christian, E. R.0000-0003-2134-3937
Additional Information:© Space Research Unit. Provided by the NASA Astrophysics Data System. This work was supported in part by NASA grants at Washington University, Caltech, GSFC, JPL, and in pan by the McDonnell Center for the Space Sciences at Washington University.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1997-22
Record Number:CaltechAUTHORS:20141022-162035331
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50708
Deposited By: Deborah Miles
Deposited On:27 Oct 2014 02:34
Last Modified:09 Mar 2020 13:19

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