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Conferences
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ICN-UNAM
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3
icrc2007@icrc2007.unam.mx
30th International Cosmic Ray Conference
The 30th International Cosmic Ray Conference will be held from July 3, 2007 to July 11, 2007 in Merida, Yucatan, Mexico.
True
Merida, Mexico
2007-07-03T08:00:00
2007-07-11T19:00:00
2005-09-26T05:04:53
2024-04-12T17:46:55
Mexico/General
Dr.
IGeof-UNAM
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87
false
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1
Poster
Effects of Nuclear Cross Sections at Different Energies on Space Radiation Exposure from Galactic Cosmic Rays
Dr.
University of Alabama in Huntsville/NASA Marshall Space Flight Center
c84795871cb7f8c81f705e490d452507
Dr.
University of Alabama in Huntsville/NASA Marshall Space Flight Center
c84795871cb7f8c81f705e490d452507
Dr.
NASA Marshall Space Flight Center
656b47928ed3fa3e289ad7225e0b2314
Merida, Mexico
Regency (Hyatt)
Space radiation from galactic cosmic rays (GCR) is a major hazard to space crews,
especially in long duration human space explorations. For this reason, they will be
protected by radiation shielding that fragments the GCR heavy ions. Here we
investigate how sensitive the crew’s radiation exposure is to nuclear fragmentation
cross sections at different energies. We find that in deep space cross sections
between about 0.2 and 1.2 GeV/u have the strongest effect on dose equivalent behind
shielding in solar minimum GCR environments, and cross sections between about 0.6 and
1.7 GeV/u are the most important at solar maximum. On the other hand, at the location
of the International Space Station, cross sections at higher energies, between about
0.6 and 1.7 GeV/u at solar minimum and between about 1.7 and 3.4 GeV/u at solar
maximum, are the most important. This is due to the average geomagnetic cutoff for
the ISS orbit. We also show the effect of uncertainties in the fragmentation cross
sections on the elemental energy spectra behind shielding. These results help to
focus the studies of fragmentation cross sections on the proper energy range in order
to improve our predictions of crew exposures.
1
More information about the venue
http://www.icrc2007.unam.mx/
link
http://www.icrc2007.unam.mx/
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