The possible use of high altitude lakes as solar neutron detectors

Details The possible use of high altitude lakes as solar neutron detectors The possible use of high altitude lakes as solar neutron detectors

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....8.3073w&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

The possibility is investigated of installing a huge solar neutron detector in lakes located high mountains. Instead of using conventional neutron monitors, ¡ He proportional counters are supposed to be placed in the lake water. High energy (¢ 100 MeV) neutrons entering into the water are thermalized and detected by the counters aligned as far apart as possible. The optimal alignment of counters was determined using the Geant3 Monte Carlo simulator. We have found, however, the large cross section for thermal neutrons in water does not allow the installation of the counters at wide separation. With the optimal separation of 15 cm, an extremely large detector cannot be realized. A test experiment has been performed with a ¡ He proportional counter, which is set in a water tank at Mt. Norikura in Japan.

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