Latitude effect on neutron albedo flux

Boella, G.; Antoni, G. Degli; Dilworth, C.; Scarsi, L.; Pizzi, Giulia; Tagliabue, M

doi:10.1007/bf02773205

Cited by 7 publications

(1 citation statement)

References 6 publications

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“…Greenhill et al [1965] and the present authors agree within experimental errors (+15%) at X • 50 ø. I-Iowever, Greenhill and colleagues appear to have underestimated the contributions to the counting rate from local production at higher latitudes, so that their observations should be decreased by 10-15%. A normalization of the measurement in 1963 by Boella et al [1965a] to sunspot minimum increases it from 0.58 to 0.66 (cm' sec)-L Even so, it is smaller than the other values. The data of Holt et al [1966] are much larger at high latitudes.…”

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confidence: 73%

Cosmic-ray neutron flux measurements above the atmosphere

Lockwood¹,

Friling²

1968

J. Geophys. Res.

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Measurements have been made of the neutron intensities above the atmosphere at rocket altitudes with a moderated He³ neutron detector. The He³ proportional counter was encased in a polyethylene moderator, and the moderator and neutron detector were surrounded by a ring of charged particle counters to discriminate against neutrons produced in the detector assembly by galactic and solar cosmic rays. Flights were made from 1965–1967 at 0°, 20°, 50°, and 70° geomagnetic latitudes (λ). The neutron counting rates at these latitudes are 0.3, <0.7, 1.7, and 3.0 sec−1, respectively. These counting rates can be converted to a neutron leakage flux in the energy range 10 to 5 × 106 ev by using the neutron detector calibration curve and Lingenfelter's calculated neutron energy spectrums at different latitudes. The neutron leakage flux is 0.08 ± 0.02 and 0.80 ± 0.10 neutrons/cm² sec at λ = 0° and λ = 70°, respectively. This latitude effect is about 10/1, less than the 13/1 ratio calculated by Lingenfelter in 1963. For λ < 50°, the measured and the calculated neutron fluxes agree.

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confidence: 73%