Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition)
From February 1968 to January 1969, cosmic ray nucleonic component was observed at Syowa Station, Antarctica (69°00'S, 39°35'E), using a duplicate set of 5-NM-64 super neutron monitor with a multiplicity meter. Almost complete observations were achieved except the lack of 4 consecutive day...
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National Institute of Polar Research
1971
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Online Access: | https://doi.org/10.15094/00007638 https://doaj.org/article/a117a158790b4af9ac6fa9acaacd4600 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:a117a158790b4af9ac6fa9acaacd4600 2023-05-15T13:42:15+02:00 Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) Tomoshige SUDA Masahiro KODAMA 1971-12-01 https://doi.org/10.15094/00007638 https://doaj.org/article/a117a158790b4af9ac6fa9acaacd4600 en other eng National Institute of Polar Research doi:10.15094/00007638 0085-7289 2432-079X https://doaj.org/article/a117a158790b4af9ac6fa9acaacd4600 undefined Antarctic Record, Iss 42, Pp 1-15 (1971) geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 1971 fttriple https://doi.org/10.15094/00007638 2023-01-22T19:23:12Z From February 1968 to January 1969, cosmic ray nucleonic component was observed at Syowa Station, Antarctica (69°00'S, 39°35'E), using a duplicate set of 5-NM-64 super neutron monitor with a multiplicity meter. Almost complete observations were achieved except the lack of 4 consecutive days for one monitor. The mean multiplicity of the monitor is 1.42 ± 0.03 and is in agreement with the value of the standard 6-NM-64 monitor obtained by HATTON, et al. The mean life time of neutrons in the pile is found to be 547 ± ^_μs which is a little longer than that in the 6-NM-64 monitor. These results come from the pile which was constructed as a single pile consisting of 10-NM-64 neutron counters. The annual change of neutron intensity covers 9.0% in range, showing the maximum in April and the minimum in November, with larger disturbance in the later half year than in the former half. The multiplicity dependence of the barometric pressure effect and Forbush decreases are surveyed briefly. Using the data from three large Forbush decreases, the relation between the multiplicity events and their corresponding primary rigidities is discussed by comparing the latitude dependence of the amount of decrease. Descriptions and data of the solar cosmic ray event of November 18, 1968 are also given. Article in Journal/Newspaper Antarc* Antarctic Antarctica Unknown Antarctic Syowa Station |
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Open Polar |
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Unknown |
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language |
English |
topic |
geo |
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geo Tomoshige SUDA Masahiro KODAMA Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) |
topic_facet |
geo |
description |
From February 1968 to January 1969, cosmic ray nucleonic component was observed at Syowa Station, Antarctica (69°00'S, 39°35'E), using a duplicate set of 5-NM-64 super neutron monitor with a multiplicity meter. Almost complete observations were achieved except the lack of 4 consecutive days for one monitor. The mean multiplicity of the monitor is 1.42 ± 0.03 and is in agreement with the value of the standard 6-NM-64 monitor obtained by HATTON, et al. The mean life time of neutrons in the pile is found to be 547 ± ^_μs which is a little longer than that in the 6-NM-64 monitor. These results come from the pile which was constructed as a single pile consisting of 10-NM-64 neutron counters. The annual change of neutron intensity covers 9.0% in range, showing the maximum in April and the minimum in November, with larger disturbance in the later half year than in the former half. The multiplicity dependence of the barometric pressure effect and Forbush decreases are surveyed briefly. Using the data from three large Forbush decreases, the relation between the multiplicity events and their corresponding primary rigidities is discussed by comparing the latitude dependence of the amount of decrease. Descriptions and data of the solar cosmic ray event of November 18, 1968 are also given. |
format |
Article in Journal/Newspaper |
author |
Tomoshige SUDA Masahiro KODAMA |
author_facet |
Tomoshige SUDA Masahiro KODAMA |
author_sort |
Tomoshige SUDA |
title |
Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) |
title_short |
Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) |
title_full |
Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) |
title_fullStr |
Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) |
title_full_unstemmed |
Report of Cosmic-Ray Neutron Observation in the 9th Japanese Antarctic Research Expedition 1968-1969 (Reports of the Japanese Antarctic Research Expedition) |
title_sort |
report of cosmic-ray neutron observation in the 9th japanese antarctic research expedition 1968-1969 (reports of the japanese antarctic research expedition) |
publisher |
National Institute of Polar Research |
publishDate |
1971 |
url |
https://doi.org/10.15094/00007638 https://doaj.org/article/a117a158790b4af9ac6fa9acaacd4600 |
geographic |
Antarctic Syowa Station |
geographic_facet |
Antarctic Syowa Station |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
Antarctic Record, Iss 42, Pp 1-15 (1971) |
op_relation |
doi:10.15094/00007638 0085-7289 2432-079X https://doaj.org/article/a117a158790b4af9ac6fa9acaacd4600 |
op_rights |
undefined |
op_doi |
https://doi.org/10.15094/00007638 |
_version_ |
1766165883134148608 |