Accession Number:

ADA235453

Title:

Calculations of the Relative Effectiveness of Alanine for Neutrons with Energies Up to 17.1 MeV

Descriptive Note:

Corporate Author:

ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD

Personal Author(s):

• Gerstenberg, H. M.
• Hansen, J. W.
• Coyne, J. J.
• Zoetelief, J.

Report Date:

1990-01-01

Pagination or Media Count:

7.0

Abstract:

The relative effectiveness RE of alanine has been calculated for neutrons using the RE of alanine for charged particles. The neutrons interact with one or more of the elements hydrogen, carbon, nitrogen and oxygen that compose the alanine. These interactions produce spectra of secondary charged particles consisting of ions of H, D, He, Be, B, C, N, and O. From a combination of the calculated secondary charged particle spectra generated by the slowing down neutrons, and the calculated RE of the ions produced, a RE for the neutrons can be obtained. In addition, lineal energy spectra were determined for neutrons with energies up to 17.1 MeV interacting with alanine. An analytical code was used to calculate these spectra for a 1 microns diameter alanine cell surrounded by an alanine medium. For comparison, similar calculations were made for muscle tissue. Finally, the calculated differential RE was folded with dose distributions to obtain RE-weighted distributions for alanine.

Descriptors:

• *ALANINES
• REPRINTS
• TISSUES(BIOLOGY)
• DISTRIBUTION
• SECONDARY
• ENERGY
• CHARGED PARTICLES
• CARBON
• NITROGEN
• HYDROGEN
• OXYGEN
• CODING
• PARTICLE SPECTRA
• SPECTRA
• DOSAGE
• MUSCLES
• NEUTRONS
• LINEAR SYSTEMS
• IONS

Subject Categories:

• Biochemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE