Physics
Scientific paper
Jan 1948
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1948rvmp...20..360b&link_type=abstract
Reviews of Modern Physics, vol. 20, Issue 1, pp. 360-366
Physics
11
Scientific paper
With an improved Geiger counter telescope, having an angular aperture of about +/-15° from its axis, a series of balloon flights was made in August and September, 1947, at seven stations extending from San Antonio, Texas, to Saskatoon, Canada. The axis of the telescope in all cases was oriented in a vertical direction. All sets of equipment were compared with a standard to reduce all results to a common basis. The standard sets, in turn, were compared with an accurately constructed telescope which had been used to make an absolute determination of cosmic-ray intensity at the vertical in Pasadena. Two flights were made from each of the seven stations. The agreement between flights made within a few hours of each other at a given station is very good. Results from two flights made at a given station several days apart are not in general as consistent. Likewise, no monotonic increase of the radiation with increase of latitude was observed. Evidence is presented for rather large fluctuations at high altitudes of the lower energy components of cosmic rays. Some of the reasons for these fluctuations are discussed.
Biehl A. T.
Montgomery R. A.
Neher Victor H.
Pickering William H.
Roesch W. C.
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