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Absolute differential sea level muon spectra at zenith angles 45$sup 0$W and 60$sup 0$W near the geomagnetic equator

Journal Article · · J. Phys., A (London), v. 7, no. 1, pp. 158-166
OSTI ID:4325697
The absolute sea level differential cosmic muon spectra at zenith angles 45 deg and 60 deg in the western azimuth have been determined near the geomagnetic equator (at 12 deg N) by using the range spectrograph in the momentum interval 0.5 to 3 GeV/c. The experimental muon spectra after corrections agree well with the spectra, calculated after Jabs theory for the same location, above muon momentum 1.8 GeV/c. The results have been compared with others obtained at higher latitudes. It is found that the variation of differential muon intensity with 1g sec theta ( theta is the zenith angle of the spectrograph axis) diminishes slowly with the increase of muon momentum from 1 to 3 GeV./c. The variation of the cosine exponent in the expression I( theta ) = I( theta ) cos/ sup n/ theta agrees with that calculated after Jabs. The present spectra after latitude corrections for 55 deg N agree well with that magnetic spectrograph result of Allkofer and Andresen (Nuovo Cim. B; 51: Judge and Nash (Nuovo Cim.; 35: 999-1024 (1965)) for 60 deg W. (auth)
Research Organization:
Presidency Coll., Calcutta
NSA Number:
NSA-29-021731
OSTI ID:
4325697
Journal Information:
J. Phys., A (London), v. 7, no. 1, pp. 158-166, Journal Name: J. Phys., A (London), v. 7, no. 1, pp. 158-166; ISSN JPAGB
Country of Publication:
United Kingdom
Language:
English

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