2021-10-26T00:54:49Zhttps://soar-ir.repo.nii.ac.jp/oaioai:soar-ir.repo.nii.ac.jp:000122612021-03-01T11:31:14ZTheoretical Calculation of Cosmic-Ray Solar Semi-Diurnal Variation -Nucleonic ComponentMORI, SATORU37290YASUE, SHIN-ICHI37291Theoretical calculations of the solar semi-diurnal variation expected at 41 stations for the nucleonic component have been made for two types of spectra, the power- and exponential-type. The latitude distribution of the semi-diurnal anisotropy has also been considered of both forms of the cosine- and the square of the cosine-function of the geographic latitude. Calculated results for four cases of the combination of these spectral and latitude dependences are compared. It is found that a difference in the results for the two types of the latitude distribution is appreciably large, particularly in the amplitude at high and very high latitude stations. A tendency is also shown in comparison of the results for the two types of spectral dependences that the calculated values with some higher cut-off rigidity in the power-type spectrum rather corresponds to the values with the rigidity giving the peak intensity in the exponential-type spectrum. Finally the expected relative amplitude and average deflection angle are tabulated for the case where the spectral form is of the exponential-type of R^γexp(-R/R_0) and the latitude distribution has a form of (√3)/2cos^2λ.Article信州大学理学部紀要 5(1): 37-64(1970)departmental bulletin paper信州大学理学部1970-10-05application/pdf信州大学理学部紀要1537640583-063XAA00697923https://soar-ir.repo.nii.ac.jp/record/12261/files/Science05-01-06.pdfeng