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Induction of Micronuclei in Human Fibroblasts from the Los Alamos High Energy Neutron BeamThe space radiation field includes a broad spectrum of high energy neutrons. Interactions between these neutrons and a spacecraft, or other material, significantly contribute to the dose equivalent for astronauts. The 15 degree beam line in the Weapons Neutron Research beam at Los Alamos Nuclear Science Center generates a neutron spectrum relatively similar to that seen in space. Human foreskin fibroblast (AG1522) samples were irradiated behind 0 to 20 cm of water equivalent shielding. The cells were exposed to either a 0.05 or 0.2 Gy entrance dose. Following irradiation, micronuclei were counted to see how the water shield affects the beam and its damage to cell nuclei. Micronuclei induction was then compared with dose equivalent data provided from a tissue equivalent proportional counter.
Document ID
20090026545
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Cox, Bradley
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
July 15, 2009
Subject Category
Space Radiation
Report/Patent Number
JSC-CN-18592
Meeting Information
Meeting: SK Student Presentations
Location: Houston, TX
Country: United States
Start Date: July 15, 2009
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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