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Papadopoulos, A.* ; Kyriakou, I.* ; Incerti, S.* ; Santin, G.* ; Nieminen, P.* ; Daglis, I.A.* ; Li, W.B. ; Emfietzoglou, D.*

Space radiation quality factor for Galactic Cosmic Rays and typical space mission scenarios using a microdosimetric approach.

Radiat. Environ. Biophys. 62, 221-234 (2023)
Verlagsversion DOI PMC
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Space radiation exposure from omnipresent Galactic Cosmic Rays (GCRs) in interplanetary space poses a serious carcinogenic risk to astronauts due to the-limited or absent-protective effect of the Earth's magnetosphere and, in particular, the terrestrial atmosphere. The radiation risk is directly influenced by the quality of the radiation, i.e., its pattern of energy deposition at the micron/DNA scale. For stochastic biological effects, radiation quality is described by the quality factor, [Formula: see text], which can be defined as a function of Linear Energy Transfer (LET) or the microdosimetric lineal energy ([Formula: see text]). In the present work, the average [Formula: see text] of GCR for different mission scenarios was calculated using a modified version of the microdosimetric Theory of Dual Radiation Action (TDRA). NASA's OLTARIS platform was utilized to generate the radiation environment behind different aluminum shielding (0-30 g/cm2) for a typical mission scenario in low-earth orbit (LEO) and in deep space. The microdosimetric lineal energy spectra of ions ([Formula: see text]) in 1 μm liquid water spheres were calculated by a generalized analytical model which considers energy-loss fluctuations and δ-ray transport inside the irradiated medium. The present TDRA-based [Formula: see text]-values for the LEO and deep space missions were found to differ by up to 10% and 14% from the corresponding ICRP-based [Formula: see text]-values and up to 3% and 6% from NASA's [Formula: see text]-model. In addition, they were found to be in good agreement with the [Formula: see text]-values measured in the International Space Station (ISS) and by the Mars Science Laboratory (MSL) Radiation Assessment Detector (RAD) which represent, respectively, a LEO and deep space orbit.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Korrespondenzautor
Schlagwörter Carcinogenic Risk ; Galactic Cosmic Rays ; Manned Space Missions ; Microdosimetry ; Quality Factor ; Space Radiation; Low-earth-orbit; Energy Deposition; Shuttle Missions; Dose-equivalent; Track Structure; Environment; Station; Protection; Dosimetry; Spectra
ISSN (print) / ISBN 0301-634X
e-ISSN 1432-2099
Zeitschrift Radiation and Environmental Biophysics
Quellenangaben Band: 62, Heft: 2, Seiten: 221-234 Artikelnummer: , Supplement: ,
Verlag Springer
Verlagsort One New York Plaza, Suite 4600, New York, Ny, United States
Nichtpatentliteratur Publikationen
Begutachtungsstatus Peer reviewed
Institut(e) Institute of Radiation Medicine (IRM)
Förderungen European Space Agency (ESA)
European Union (European Regional Development Fund)
Operational Programme "Competitiveness, Entrepreneurship and Innovation" (NSRF 2014- 2020)
HEAL-Link Greece