Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10).
Two Bonner sphere spectrometers (BSSs) have recently been installed to measure secondary neutrons from cosmic radiation continuously, one at the environmental research station ‘Schneefernerhaus’ at an altitude of 2650 m in Germany and the other at the Koldewey station close to the North Pole in Ny-Å...
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Oxford Univ Press
2009
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fthzmuenchen:oai:opus-zb.helmholtz-muenchen.de:2081 2023-05-15T17:39:44+02:00 Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). Rühm, W. Mares, V. Pioch, C. Simmer, G. Weitzenegger, E. 2009-01-01 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=2081 https://doi.org/10.1093/rpd/ncp161 eng eng Oxford Univ Press info:eu-repo/semantics/altIdentifier/doi/10.1093/rpd/ncp161 info:eu-repo/semantics/altIdentifier/wos/undefined info:eu-repo/semantics/altIdentifier/isbn/0144-8420 info:eu-repo/semantics/altIdentifier/pissn/0144-8420 info:eu-repo/semantics/altIdentifier/e https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=2081 doi:10.1093/rpd/ncp161 urn:isbn:0144-8420 urn:issn:0144-8420 urn:issn:1742-3406 info:eu-repo/semantics/closedAccess Radiat. Prot. Dosim. 136, 256-261 (2009) Text info:eu-repo/semantics/article 2009 fthzmuenchen https://doi.org/10.1093/rpd/ncp161 2022-11-20T08:51:29Z Two Bonner sphere spectrometers (BSSs) have recently been installed to measure secondary neutrons from cosmic radiation continuously, one at the environmental research station ‘Schneefernerhaus’ at an altitude of 2650 m in Germany and the other at the Koldewey station close to the North Pole in Ny-Ålesund, Spitsbergen. After unfolding, both systems provide neutron fluence energy distributions as a function of time. Based on these distributions and on fluence-to-dose conversion coefficients, mean ambient dose equivalent rate values of 75.0 ± 2.9 nSv h–1 and 8.7 ± 0.6 nSv h–1 were obtained for October 2008, respectively (quoted uncertainties represent standard deviations of 124 values obtained during the measurement period). Ambient dose equivalent rates measured by means of an extended rem counter at the Schneefernerhaus agree with those based on the BSS neutron energy distributions within 5 %. The ambient dose equivalent rate was also calculated based on simulated FLUKA neutron energy distributions in the atmosphere. Even without detailed modelling of the local environment, an agreement better than 30 % was obtained between the ambient dose equivalent rate based on the FLUKA distributions and those based on the BSS measurements at the Schneefernerhaus, for neutrons above about 20 MeV. This agreement is expected to be even better if the influence of the local environment on the measured neutron fluence energy distribution will be calculated. Article in Journal/Newspaper North Pole Ny Ålesund Ny-Ålesund Spitsbergen PuSH - Publikationsserver des Helmholtz Zentrums München Fluka ENVELOPE(17.567,17.567,66.017,66.017) North Pole Ny-Ålesund Radiation Protection Dosimetry 136 4 256 261 |
institution |
Open Polar |
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PuSH - Publikationsserver des Helmholtz Zentrums München |
op_collection_id |
fthzmuenchen |
language |
English |
description |
Two Bonner sphere spectrometers (BSSs) have recently been installed to measure secondary neutrons from cosmic radiation continuously, one at the environmental research station ‘Schneefernerhaus’ at an altitude of 2650 m in Germany and the other at the Koldewey station close to the North Pole in Ny-Ålesund, Spitsbergen. After unfolding, both systems provide neutron fluence energy distributions as a function of time. Based on these distributions and on fluence-to-dose conversion coefficients, mean ambient dose equivalent rate values of 75.0 ± 2.9 nSv h–1 and 8.7 ± 0.6 nSv h–1 were obtained for October 2008, respectively (quoted uncertainties represent standard deviations of 124 values obtained during the measurement period). Ambient dose equivalent rates measured by means of an extended rem counter at the Schneefernerhaus agree with those based on the BSS neutron energy distributions within 5 %. The ambient dose equivalent rate was also calculated based on simulated FLUKA neutron energy distributions in the atmosphere. Even without detailed modelling of the local environment, an agreement better than 30 % was obtained between the ambient dose equivalent rate based on the FLUKA distributions and those based on the BSS measurements at the Schneefernerhaus, for neutrons above about 20 MeV. This agreement is expected to be even better if the influence of the local environment on the measured neutron fluence energy distribution will be calculated. |
format |
Article in Journal/Newspaper |
author |
Rühm, W. Mares, V. Pioch, C. Simmer, G. Weitzenegger, E. |
spellingShingle |
Rühm, W. Mares, V. Pioch, C. Simmer, G. Weitzenegger, E. Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). |
author_facet |
Rühm, W. Mares, V. Pioch, C. Simmer, G. Weitzenegger, E. |
author_sort |
Rühm, W. |
title |
Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). |
title_short |
Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). |
title_full |
Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). |
title_fullStr |
Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). |
title_full_unstemmed |
Continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of H*(10). |
title_sort |
continuous measurement of secondary neutrons from cosmic radiation at mountain altitudes and close to the north pole - a discussion in terms of h*(10). |
publisher |
Oxford Univ Press |
publishDate |
2009 |
url |
https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=2081 https://doi.org/10.1093/rpd/ncp161 |
long_lat |
ENVELOPE(17.567,17.567,66.017,66.017) |
geographic |
Fluka North Pole Ny-Ålesund |
geographic_facet |
Fluka North Pole Ny-Ålesund |
genre |
North Pole Ny Ålesund Ny-Ålesund Spitsbergen |
genre_facet |
North Pole Ny Ålesund Ny-Ålesund Spitsbergen |
op_source |
Radiat. Prot. Dosim. 136, 256-261 (2009) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1093/rpd/ncp161 info:eu-repo/semantics/altIdentifier/wos/undefined info:eu-repo/semantics/altIdentifier/isbn/0144-8420 info:eu-repo/semantics/altIdentifier/pissn/0144-8420 info:eu-repo/semantics/altIdentifier/e https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=2081 doi:10.1093/rpd/ncp161 urn:isbn:0144-8420 urn:issn:0144-8420 urn:issn:1742-3406 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1093/rpd/ncp161 |
container_title |
Radiation Protection Dosimetry |
container_volume |
136 |
container_issue |
4 |
container_start_page |
256 |
op_container_end_page |
261 |
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1766140514878357504 |