@article{oai:repo.qst.go.jp:00043119,
 author = {藤元, 憲三 and Ｏ'ＢＲＩＥＮ, Ｋｅｒｅｎ and 藤元 憲三},
 issue = {4},
 journal = {保健物理},
 month = {},
 note = {Dose rates due to cosmic rays at all municipalities in Japan are
estimated using a computer code (PLOTINUS) developed by K. O'Brien.
Latitude, longitude and altitude data for all municipalities are assumed to
be represented by the location of the city office and categorized into 417
data sets every degree for latitude, every two degrees for longitude, and
every 50-m for altitude as input data for computation. The outputs for each
cosmic ray component are grouped into two categories, ionizing component
including photons and neutron component. The population weighted average
dose in Japan is estimated to be 29.2 nSv h-1 for the ionizing component,
6.1 nSv h-1 for the neutron component and 35.3 nSv h-1 for the total. The
highest value among prefecture averages is found in Nagano Prefecture to be
44.0 nSv h-1 although it is not located at the highest latitude but at the
highest altitude. Based on the assumption in the UNSCEAR 2000 Report for
dose estimation due to cosmic rays, the doses in Japan are estimated to be
0.21 mSv a-1 for the ionizing component, 0.045 mSv a-1 for the neutron
component and 0.26 mSv a-1 for the total.},
 pages = {325--334},
 title = {我が国における宇宙線からの線量評価},
 volume = {37},
 year = {2002}
}