EFFECT OF WALL THICKNESS ON MEASUREMENT OF DOSE FOR HIGH ENERGY NEUTRONS

• DOI: 10.1097/hp.0b013e3181b8d032
• Publication Date: 2009-12-03T08:20:21Z
• Authors: Delia Perez-Nunez; Leslie A. Braby
• Keywords: Equivalent dose

Neutrons produced from the interaction between galactic cosmic rays and spacecraft materials are responsible for a very important portion of dose received by astronauts. The neutron energy spectrum depends on incident charged particle scattering environment but generally extends to beyond 100 MeV. Tissue-equivalent proportional counters (TEPC) used measure during space mission, their weight size factors design construction. To achieve ideal dosimetry, wall thickness should be at least range proton having maximum neutrons monitored. This is 0.1 cm 10 MeV 7.6 neutrons. A TEPC would provide equilibrium (CPE) up MeV, applications it not reasonable in terms size. In order estimate errors measured due absence CPE, MCNPX simulations deposited sites with 8.5 were performed. results show that deposition per approaches plateau as cm. For neutrons, decreases increases above attenuation.