High-LET dose-response characteristics described by track structure theory of heavy charged particles

J.W. Hansen; K.J. Olsen

High-LET dose-response characteristics described by track structure theory of heavy charged particles

J.W. Hansen, K.J. Olsen

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Abstract

The track structure theory developed by Katz and coworkers describes the effect of high-LET radiation to the highly inhomogeneous dose distribution due to low energy δ-rays ejected from the particle track. The theory predicts the effectiveness of high-LET radiation by using the ion parameters z_eff effective charge of the ion, and β = v/c, the relative ion velocity, together with the characteristic dose D₃₇ derived from low-LET dose-response characteristic of the detector and the approximate size a of the sensitive element of the detector. ⁶⁰Co gamma-irradiation is used as a reference low-LET radiation, while high-LET radiation ranging from 16MeV protons to 4MeV/amu ¹⁶O-ions covering an initial LET range of 30-5500 MeVcm²/g is obtained from a tandem Van de Graff accelerator.
A thin film (5mg/cm²) radiochromic dye cyanide plastic dosemeter was used as detector with the characteristic dose of 16.8 Mrad and a sensitive element size of 10^-7.
Theoretical and experimental effectiveness, RBE. agreed within 10 to 25% depending on LET.

Original language	English

Place of Publication	Roskilde, Denmark
Publisher	Risø National Laboratory
Number of pages	19
ISBN (Print)	87-550-0788-0
Publication status	Published - 1981

Series	Risø-M
Number	2308
ISSN	0418-6435

Keywords

Risø-M-2308
Colorimetric dosemeters
Cyanides
Dose-response relationships
Dyes
Ionizing radiators
Let
Particle tracs
Radiation detectors

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title = "High-LET dose-response characteristics described by track structure theory of heavy charged particles",

abstract = "The track structure theory developed by Katz and coworkers describes the effect of high-LET radiation to the highly inhomogeneous dose distribution due to low energy δ-rays ejected from the particle track. The theory predicts the effectiveness of high-LET radiation by using the ion parameters zeff effective charge of the ion, and β = v/c, the relative ion velocity, together with the characteristic dose D37 derived from low-LET dose-response characteristic of the detector and the approximate size a of the sensitive element of the detector. 60Co gamma-irradiation is used as a reference low-LET radiation, while high-LET radiation ranging from 16MeV protons to 4MeV/amu 16O-ions covering an initial LET range of 30-5500 MeVcm2/g is obtained from a tandem Van de Graff accelerator. A thin film (5mg/cm2) radiochromic dye cyanide plastic dosemeter was used as detector with the characteristic dose of 16.8 Mrad and a sensitive element size of 10-7.Theoretical and experimental effectiveness, RBE. agreed within 10 to 25% depending on LET. ",

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T1 - High-LET dose-response characteristics described by track structure theory of heavy charged particles

AU - Hansen, J.W.

AU - Olsen, K.J.

PY - 1981

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N2 - The track structure theory developed by Katz and coworkers describes the effect of high-LET radiation to the highly inhomogeneous dose distribution due to low energy δ-rays ejected from the particle track. The theory predicts the effectiveness of high-LET radiation by using the ion parameters zeff effective charge of the ion, and β = v/c, the relative ion velocity, together with the characteristic dose D37 derived from low-LET dose-response characteristic of the detector and the approximate size a of the sensitive element of the detector. 60Co gamma-irradiation is used as a reference low-LET radiation, while high-LET radiation ranging from 16MeV protons to 4MeV/amu 16O-ions covering an initial LET range of 30-5500 MeVcm2/g is obtained from a tandem Van de Graff accelerator. A thin film (5mg/cm2) radiochromic dye cyanide plastic dosemeter was used as detector with the characteristic dose of 16.8 Mrad and a sensitive element size of 10-7.Theoretical and experimental effectiveness, RBE. agreed within 10 to 25% depending on LET.

AB - The track structure theory developed by Katz and coworkers describes the effect of high-LET radiation to the highly inhomogeneous dose distribution due to low energy δ-rays ejected from the particle track. The theory predicts the effectiveness of high-LET radiation by using the ion parameters zeff effective charge of the ion, and β = v/c, the relative ion velocity, together with the characteristic dose D37 derived from low-LET dose-response characteristic of the detector and the approximate size a of the sensitive element of the detector. 60Co gamma-irradiation is used as a reference low-LET radiation, while high-LET radiation ranging from 16MeV protons to 4MeV/amu 16O-ions covering an initial LET range of 30-5500 MeVcm2/g is obtained from a tandem Van de Graff accelerator. A thin film (5mg/cm2) radiochromic dye cyanide plastic dosemeter was used as detector with the characteristic dose of 16.8 Mrad and a sensitive element size of 10-7.Theoretical and experimental effectiveness, RBE. agreed within 10 to 25% depending on LET.

KW - Risø-M-2308

KW - Colorimetric dosemeters

KW - Cyanides

KW - Dose-response relationships

KW - Dyes

KW - Ionizing radiators

KW - Let

KW - Particle tracs

KW - Radiation detectors

M3 - Report

SN - 87-550-0788-0

T3 - Risø-M

BT - High-LET dose-response characteristics described by track structure theory of heavy charged particles

PB - Risø National Laboratory

CY - Roskilde, Denmark

ER -

High-LET dose-response characteristics described by track structure theory of heavy charged particles

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Keywords

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