The response of a spherical tissue-equivalent proportional counter to 56-Fe particles from 200-1000 MeV/nucleon
- LBNL Library
The radiation environment aboard the space shuttle and the International Space Station includes high-Z and high-energy (HZE) particles that are part of the galactic cosmic radiation (GCR) spectrum. Iron-56 is considered to be one of the most biologically important parts of the GCR spectrum. Tissue-equivalent proportional counters (TEPC) are used as active dosimeters on manned space flights. These TEPC's are further used to determine average quality factor for each space mission. A TEPC simulating a 1 micron diameter sphere of tissue was exposed as part of a particle spectrometer to iron-56 at energies from 200-1000 MeV/nucleon. The response of TEPC in terms of frequency-averaged lineal energy, dose-averaged lineal energy, as well as energy deposited at different impact parameters through detector was determined for six different incident energies of iron-56 in this energy range. Calculations determined that charged particle equilibrium was achieved for each of the six experiments. Energy depositions at different impact parameters were calculated using a radial dose distribution model and the results compared to experimental data.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- USDOE; National Aeronautics and Space Administration Grants L14230C and H31909D, National Science Foundation Grant INT-9910062, National Institute of Radiological Sciences Japan
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 838526
- Report Number(s):
- LBNL--48876
- Journal Information:
- Radiation Research, Journal Name: Radiation Research Journal Issue: 3 Vol. 157
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED PARTICLES
COSMIC RADIATION
DOSEMETERS
ENERGY RANGE
IMPACT PARAMETER
INTERNATIONAL SPACE STATION
IRON 56
PROPORTIONAL COUNTERS
QUALITY FACTOR
RADIATION DOSE DISTRIBUTIONS
RADIATIONS
SPACE FLIGHT
SPACE SHUTTLES
SPECTROMETERS
TEPC heavy ions response function space radiation