Prog. Theor. Phys. Vol. 5 No. 3 (1950) pp. 428-436
On the East-West Effect of the Cosmic-Radiation in the Upper Atmosphere
Institute of Theoretical Physics, Nagoya University
(Received February 28, 1950)
The fact that in the upper atmosphere there is a symmetry of the east-west intensity of the cosmic-ray, brings a difficulty to the Proton Primary Hypothesis which is assumed from the experimental results of the east-west asymmetry on each latitude and at each altitude from sea-level to 10,000 m height. To remedy the situation, Arley assumed that there exist negative protons in the primaries. But the mechanism, by which negative proton directly gives the soft component, has no clearness. In order to make clear to what extent we can solve the problem of east-west effect from the standpoint which is now accepted–that is, primary proton gives π-meson and π-meson decays into µ-meson which gives the soft component by disintegration,–we have investigated the angular distribution between the primary proton and the produced soft component.
DOI : 10.1143/PTP.5.428
T. H. Johnson and J. G. Barry, Phys. Rev. 56 (1939), 219[APS].
J. Winkler, Phys. Rev. 74 (1948), 1214[APS].
W. C. Barker, Phys. Rev. 75 (1949), 590[APS].
M. Schein and V. H. Yngve and Kraybill, Phys. Rev. 73 (1948), 928[APS].
N. Arley, Phys. Rev. 70 (1946), 975[APS].
B. Rossi, Rev. Mod. Phys. 20 (1948), 537[APS].
T. H. Johnson and J. O. Barry, Phys. Rev. 56 (1939), 219[APS].
Lemaitre and Vallarta, Phys. Rev. 50 (1936), 493[APS].
Neher and Pickering, Phys. Rev. 61 (1942), 407[APS].
Lewis, Oppenheimer and Wouthuysen, Phys. Rev. 73 (1948), 127[APS].
- S. Hayakawa and J. Nishimura, Prog. Theor. Phys. 4 (1949), 232[PTP].
Tiomno and Wheeler, Rev. Mod. Phys. 21 (1949), 144[APS].
T. H. Johnson, Phys. Rev. 56 (1939), 226[APS].
W. F. G. Swann, Phys. Rev. 76 (1949), 157[APS].
Freier, Lofgren, Ney and Oppenheimer, Phys. Rev. 74 (1948), 1818[APS].
Citing Article(s) :
Progress of Theoretical Physics Vol. 13 No. 2 (1955) pp. 205-216
The Energy Balance of Cosmic Rays