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Nonperturbative methods in HZE propagationAn analytical solution to the perturbative multiple collision series of a fragmenting HZE ion beam has limited usefulness since the first collision term has several hundred contributions, the second collision term has tens of thousands of contributions, and each successive collision term progresses to unwieldy computational proportions. Our previous work has revealed the multiple collision terms in the straight-ahead approximation to be simple products of a spatially dependent factor times a linear energy-dependent factor of limited domain and unit normalization. The properties of these forms allow the development of the nonperturbative summation of the series to all orders assuming energy-independent nuclear cross sections as matrix products of a scaled Green's function described herein. This nonperturbative Green's function with multiple scattering correction factors compares well with experiments using 670 MeV/u neon-20 ion beams in thick water targets.
Document ID
20050009832
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wilson, J. W.
(NASA Langley Research Center Hampton, VA United States)
Shavers, M. R.
Badavi, F. F.
Miller, J.
Shinn, J. L.
Costen, R. C.
Date Acquired
August 22, 2013
Publication Date
November 1, 1994
Publication Information
Publication: Radiation research
Volume: 140
Issue: 2
ISSN: 0033-7587
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Non-NASA Center
NASA Discipline Radiation Health

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