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A proposed performance index for galactic cosmic ray shielding materials
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Wilson, John W. Nealy, John E. Wood, J. S. Shinn, Judy L. Cucinotta, Francis A. |
| Copyright Year | 1993 |
| Description | In past studies, the reductions in absorbed dose and dose equivalent due to choice of material composition have been used to indicate shield effectiveness against exposure to galactic cosmic rays. However, these quantities are highly inaccurate in assessing shield effectiveness for protection against the biological effects of long-term exposure to the galactic heavy ions. A new quantity for shield performance is defined that correlates well with cell killing and cell transformation behind various shield thicknesses and materials. In addition, a relative performance index is identified that is inversely related to biological injury for different materials at a fixed shield mass and is directly related to the ratio of the fourth- and the second-order linear energy transfer (LET) moments. |
| File Size | 559650 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940006806 |
| Archival Resource Key | ark:/13960/t9h46nf7n |
| Language | English |
| Publisher Date | 1993-08-01 |
| Access Restriction | Open |
| Subject Keyword | Space Radiation Biological Effects Heavy Ions Linear Energy Transfer Let Galactic Cosmic Rays Radiation Shielding Radiation Protection Radiation Dosage Injuries Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
