Hubert G., Herbert Gaëlle, Tilhac A., Rey R., Bourlès Bernard. (2026). Analysis of cosmic ray-induced neutron spectra recorded during PIRATA oceanographic cruises. Journal of Atmospheric and Solar-Terrestrial Physics, 278, p. 106690 [12 p.]. ISSN 1364-6826.
Titre du document
Analysis of cosmic ray-induced neutron spectra recorded during PIRATA oceanographic cruises
Hubert G., Herbert Gaëlle, Tilhac A., Rey R., Bourlès Bernard
Source
Journal of Atmospheric and Solar-Terrestrial Physics, 2026,
278, p. 106690 [12 p.] ISSN 1364-6826
This paper presents the operation of a neutron spectrometer onboard the R/V La Thalassa during the PIRATA (Prediction and Research Moored Array in the Tropical Atlantic) oceanographic cruises in the equatorial Atlantic. The cruises took place from February to April in 2019 and 2020. We analyze cosmic ray-induced neutrons measured by the spectrometer, accounting for various physical factors influencing neutron detection, including environmental and systematic effects primarily driven by atmospheric pressure and water vapor content variations. Additionally, the study incorporates the influence of short-term fluctuations in primary cosmic rays to investigate the geomagnetic cutoff rigidity dependence. Detailed analyses of count rates, fluxes, and neutron spectra are provided, facilitating cross-comparison of radiation fields. The mobile neutron spectrometer enables latitude-dependent surveys, assessing the impact of geomagnetic cutoff rigidity on neutron spectra. Equivalent 3NM64 count rates were derived from PIRATA measurements and compared with previous results.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Sciences du milieu [021]
;
Limnologie / Océanographie : généralités [030]
