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Proceedings in Radiochemistry

A Supplement to Radiochimica Acta

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Dosimetry of cosmic radiation in the troposphere based on the measurements at the summit of Mt. Fuji

H. Yasuda / K. Yajima / S. Yoshida
Published Online: 2011-09-08 | DOI: https://doi.org/10.1524/rcpr.2011.0011


Dose rate of cosmic-ray origin neutrons (abbreviated to “cosmic neutrons”) at aviation altitude was estimated based on the measurements at Mt. Fuji. Cosmic neutrons were measured in a facility of the Mt. Fuji Weather Station located at the summit of Mt. Fuji, the highest mountain in Japan (3776 m in altitude), in the summer of 2008 and 2009. The average of 1 cm ambient dose equivalent H*(10) for two measurements was verified by numerical model simulation and then used to empirically estimate the solar force field potential (FFP). The H*(10) rates at aviation altitude estimated from the measurements at Mt. Fuji were compared to those obtained in in-flight measurements onboard a civilian aircraft flying near Mt. Fuji at the time between the two measurements at the mountain. According to the results obtained, we expect that the empirical estimation based on the measurements at Mt. Fuji will work effectively for dosimetry of cosmic radiation in troposphere.

Keywords: Cosmic radiation; Troposphere; Neutron; Dose; Aircraft

About the article

* Correspondence address: National Institute of Radiological Sciences, Research Center for Radiation Protection, 9-1 Anagawa 4, Inage-ku, Chiba 263-8555, Japan,

Published Online: 2011-09-08

Published in Print: 2011-09-01

Citation Information: Proceedings in Radiochemistry A Supplement to Radiochimica Acta, Volume 1, Issue 1, Pages 67–70, ISSN (Print) xxxx-xxxx, DOI: https://doi.org/10.1524/rcpr.2011.0011.

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