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Radioactive Clock Isotope Abundance Measurements from the CRIS Experiment aboard the ACE Spacecraft

Binns, W. R. and Yanasak, N. E. and Christian, E. R. and Cummings, A. C. and George, J. S. and Hink, P. L. and Klarmann, J. and Leske, R. A. and Lijowski, M. and Mewaldt, R. A. and Stone, E. C. and von Rosenvinge, T. T. and Wiedenbeck, M. E. (1999) Radioactive Clock Isotope Abundance Measurements from the CRIS Experiment aboard the ACE Spacecraft. In: Proceedings of the 26th International Cosmic Ray Conference. Vol.3. International Union of Pure and Applied Physics , pp. 21-24.

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Radioactive cosmic ray nuclei produced by nuclear interactions during cosmic ray propagation through the galaxy can be used to study the mean interstellar gas density in the propagation volume and the time scales associated with the propagation process. The Cosmic Ray Isotope Spectrometer (CRIS) aboard the Advanced Composition Explorer (ACE) has made high-resolution abundance measurements of the beta-decay secondary isotopes ^(10)Be, ^(26)Al, ^(36)Cl, and ^(54)Mn over the energy range 70-400 MeV/nuc. The large geometrical factor of CRIS (~250 cm^2sr) and the 20 months of data collection at near solar minimum conditions have made it possible since launch in August, 1997 to accumulate data samples considerably larger than previous missions. The isotopic abundances derived from these data are presented and compared with previous measurements.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Binns, W. R.0000-0001-6110-3407
Christian, E. R.0000-0003-2134-3937
Cummings, A. C.0000-0002-3840-7696
Leske, R. A.0000-0002-0156-2414
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Wiedenbeck, M. E.0000-0002-2825-3128
Additional Information:© University of Utah. Provided by the NASA Astrophysics Data System. This research was supported by NASA at California Institute of Technology (grant NAGS-6912), Jet Propulsion Laboratory, Goddard Space Flight Center, and Washington University.
Group:Space Radiation Laboratory
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Space Radiation Laboratory1999-32
Record Number:CaltechAUTHORS:20150213-095550927
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:54823
Deposited By: Deborah Miles
Deposited On:13 Feb 2015 21:30
Last Modified:09 Mar 2020 13:19

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