Ambient dose equivalent on the lunar surface is estimated as contribution from galactic cosmic rays, secondary neutrons and y rays from the lunar surface. Since the cosmic ray flux on the lunar surface vanes with the phase of the solar activity, radiation doses on the surface are calculated of the three cases of this activity; the maximum, the minimum and the average. To estimate the doses of the secondary particles, Monte Carlo simulation library Geant4 is applied. As a result, total annual dose equivalent of about 225 mSv/yr on the lunar surface is expected during the quiet time of solar activity. The dose of neutrons and y rays reaches to 50 mSv/yr and 2 mSv/yr, respectively. In particular, fast neutrons have the largest contribution to the total neutron dose. The dependency of total neutron dose for mare and highland region of the Moon is small on the lunar surface as comparing with that for solar activity.
|ホスト出版物のタイトル||Astroparticle, Particle and Space Physics, Detectors and Medical Physics Applications - Proceedings of the 10th Conference|
|出版ステータス||Published - 2008|
|イベント||International Conference on Advanced Technology and Particle Physics, ICATPP 2007 - Como|
継続期間: 2007 10月 8 → 2007 10月 12
|Other||International Conference on Advanced Technology and Particle Physics, ICATPP 2007|
|Period||07/10/8 → 07/10/12|
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