中性子線量計
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Neutron Dosimeter

Neutron dose near the AOS and the OSF was measured with a Fuji Electric NSN10014 neutron dosimeter. The detector of NSN10014 is a spherical ³He proportional counter covered in spherical polyethylene and having a neutron energy range from 0.025 eV to 8 MeV with an energy response in accordance with ICRP 51 standard. Measured neutron dose rates were 0.80 mSv yr^-1 at Pampa La Bola, and 0.25 mSv yr^-1 at San Pedro de Atacama, respectively, whereas it was 0.01 mSv yr^-1 at Santiago. These values are even higher than world average dose rates at comparable altitudes, probably reflecting enhancement of incoming primary cosmic rays near the South Atlantic Anomaly.

Specifications

Technical Description

References

• Sakamoto, S., Iguchi, S., Wajima, K., Koshiishi, H., Goka, T., Matsumoto, H., & Kitamura, H. 2003, "Levels of radiation exposure near AOS and OSF," ALMA Memo 446

Data