A Green's function method for heavy ion beam transport.

Abstract:

:The use of Green's function has played a fundamental role in transport calculations for high-charge high-energy (HZE) ions. Two recent developments have greatly advanced the practical aspects of implementation of these methods. The first was the formulation of a closed-form solution as a multiple fragmentation perturbation series. The second was the effective summation of the closed-form solution through nonperturbative techniques. The nonperturbative methods have been recently extended to an inhomogeneous, two-layer transport media to simulate the lead scattering foil present in the Lawrence Berkeley Laboratories (LBL) biomedical beam line used for cancer therapy. Such inhomogeneous codes are necessary for astronaut shielding in space. The transport codes utilize the Langley Research Center atomic and nuclear database. Transport code and database evaluation are performed by comparison with experiments performed at the LBL Bevalac facility using 670 A MeV 20Ne and 600 A MeV 56Fe ion beams. The comparison with a time-of-flight and delta E detector measurement for the 20Ne beam and the plastic nuclear track detectors for 56Fe show agreement up to 35%-40% in water and aluminium targets, respectively.

journal_name

Radiat Environ Biophys

authors

Shinn JL,Wilson JW,Schimmerling W,Shavers MR,Miller J,Benton EV,Frank AL,Badavi FF

doi

10.1007/BF01211542

subject

Has Abstract

pub_date

1995-08-01 00:00:00

pages

155-9

issue

3

eissn

0301-634X

issn

1432-2099

journal_volume

34

pub_type

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