Measurement of the alpha particle flux at 41°N geomagnetic latitude using nuclear emulsions
Tóm tắt
Values obtained for theα-particle flux by counter measurements at 41°N over the U.S.A. are significantly higher than those obtained using nuclear emulsions at 41°N over Sardinia. We have measured theα-particle flux at 41°N over the U.S.A. using nuclear emulsions and the results in agreement with counter measurements are higher than those over Sardinia. These measurements are of interest in view of the proposed modifications to geomagnetic co-ordinates.
Tài liệu tham khảo
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RecentlyAly andWaddington have obtained a value of (72 ± 9) for the α-particle flux from an emulsion stack flown in Sardinia. Although much higher than that found byde Marco et al. it is still significantly lower than our value over the U.S.A. Private communicationC. J. Waddington (1957).