Altitude variation of cosmic-ray neutrons.
Health Phys
; 53(5): 509-17, 1987 Nov.
Article
em En
| MEDLINE
| ID: mdl-3667276
ABSTRACT
The altitude variation of the cosmic-ray neutron energy spectrum and the dose equivalent rate was measured at an average geomagnetic latitude of 24 degrees N by using the high-efficiency multi-sphere neutron spectrometer and neutron dose-equivalent counter developed by the authors. The data were obtained from a 2-h flight over Japan on 27 February 1985. The neutron energy spectra measured at sea level and at altitudes of 4,880 m and at 11,280 m were compared with the calculated spectra of O'Brien and with other experimental spectra, and they are in moderately good agreement with them. The dose equivalent rate increases according to a quadratic curve up to about 6,000 m and then increases linearly between 6,000 m and 11,280 m. The dependence of dose equivalent rates at sea level and at an altitude of 12,500 m on geomagnetic latitude also is given by referring to other experimental results.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Radiação Cósmica
/
Altitude
/
Nêutrons
Idioma:
En
Revista:
Health Phys
Ano de publicação:
1987
Tipo de documento:
Article
País de afiliação:
Japão