The momentum spectra of cosmic-ray particles at sea level in the momentum range (0.05÷6) GeV/c

1970 ◽  
Vol 3 (1) ◽  
pp. 6-8 ◽  
Author(s):  
O. C. Allkofer ◽  
P. Knoblich
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Momentum Range ◽  
Momentum Spectra

Sea level muon spectrum from pion and kaon spectra in the atmosphere

1976 ◽  
Vol 54 (18) ◽  
pp. 1880-1883 ◽  
Author(s):  
Deba Prasad Bhattacharyya
Keyword(s):  
Diffusion Equation ◽  
Sea Level ◽  
Satellite Data ◽  
Cosmic Ray ◽  
Muon Spectrum ◽  
Momentum Range ◽  
Type Distribution ◽  
Muon Momentum ◽  
Muon Intensity

The pion and kaon spectra in the top of the atmosphere have been derived from the satellite data of cosmic ray nucleons by using the Bose-type distribution of secondary mesons produced in the inclusive reactions p + p → π− + X and p + p → K− + X. The derived pion and kaon spectra follow the relations of the form π(Eπ) dEπ = 0.184Eπ−2.6 dEπ and K(Ek) dEk = 0.036 Ek−2.6 dEk. With the help of the diffusion equation for pions and kaons in the atmosphere, the sea level muon spectrum has been derived and the results have been compared with the magnetic spectrograph data of Allkofer, Carstensen, and Dau in the muon momentum range 15–1000 GeV/c. The sea level muon intensity arising from kaon parentage increases with energy.

Measurements of the Momentum Spectrum and Charge Ratio of Cosmic Ray Muons at Sea Level in the Momentum Range 10 GeV/c-1000 GeV/c

1961 ◽  
Vol 78 (4) ◽  
pp. 505-515 ◽  
Author(s):  
J E R Holmes ◽  
B G Owen ◽  
A L Rodgers
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Momentum Spectrum ◽  
Charge Ratio ◽  
Momentum Range

Sea-level cosmic ray spectra at large zenith angles

1961 ◽  
Vol 265 (1320) ◽  
pp. 117-132 ◽  
Keyword(s):  
Sea Level ◽  
Meson Production ◽  
Cosmic Ray ◽  
Great Accuracy ◽  
Statistical Fluctuation ◽  
Momentum Range ◽  
Production Spectrum ◽  
A Value ◽  
The Mean ◽  
Particle Intensity

Measurements have been made at Durham (200ft. above sea level) with an emulsion spectrograph of the absolute cosmic ray particle intensity in the momentum range 1 to 100 GeV/ c at zenith angles of between 65° and 85°. It is found that a differential π-meson production spectrum of the form I 0 E -y fits closely the present results as well as the accepted vertical spectrum. The values of the parameters when E lies between 6 and 1000 GeV are given by the equations I 0 = 0.425 — 01.25 log 10 E and y = 3.92 — 0.944 (1 — 0.125 log 10 E ) -1 and their approximate constant values in this range are 0T5 and 2*55 respectively. The analysis is based on the model of Barrett, Bollinger, Cocconi, Eisenberg & Greisen (1952) but, in addition, the effects of scattering and geomagnetic deflexion of u-mesons in the atmosphere have been taken into account as well as their production over a range of atmospheric depths. Although in principle it should be possible from the form of the sea-level spectra at large zenith angles to determine the relative numbers of π- and K -mesons at production, it is shown that very great accuracy is required in order to do so. Nevertheless, the agreement between the theoretical curves and the experimental measurements indicates that the main assumptions concerning the production and propagation of mesons in the atmosphere are correct. The mean positive to negative ratio is 1.39±0.08, a value rather larger than is found by other observers at 68°, but within statistical fluctuation.

Momentum Spectra of Cosmic-Ray Mesons and Protons at Sea Level and 3.4-km Altitude

1952 ◽  
Vol 86 (6) ◽  
pp. 940-946 ◽  
Author(s):  
W. L. Whittemore ◽  
R. P. Shutt
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Momentum Spectra

The Momentum Spectrum of Cosmic Ray Muons near Sea Level in the Momentum Range 0.4-10 GeV/c

1962 ◽  
Vol 80 (3) ◽  
pp. 697-709 ◽  
Author(s):  
M Gardener ◽  
D G Jones ◽  
F E Taylor ◽  
A W Wolfendale
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Momentum Spectrum ◽  
Momentum Range

The Momentum Spectrum of Cosmic Ray Muons near Sea Level in the Momentum Range 5-1000 GeV/c

1962 ◽  
Vol 80 (3) ◽  
pp. 710-728 ◽  
Author(s):  
P J Hayman ◽  
A W Wolfendale
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Momentum Spectrum ◽  
Momentum Range

The Momentum Spectrum and Positive Excess of Cosmic Ray Mesons at Sea-Level

1951 ◽  
Vol 4 (1) ◽  
pp. 16
Author(s):  
DE Caro ◽  
JK Parry ◽  
HD Rathgeber
Keyword(s):  
Sea Level ◽  
Momentum Distribution ◽  
Cosmic Ray ◽  
Momentum Spectrum ◽  
Air Gap ◽  
Momentum Range

A spectrometer for momentum measurements on cosmic ray particles is described. Charged C.R. particles are deflected in the air gap of an electromagnet and the deflection is recorded by an array of G.M. counters. The momentum distribution and positive excess of particles which penetrate 10 cm. of lead is determined over a momentum range 2.4 x 108 eV/c. to 5 X 1010 eV./c. from measurements on 6056 particles.

The momentum spectrum of cosmic ray protons near sea level in the momentum range 0.6-150 GeV/c

1964 ◽  
Vol 83 (5) ◽  
pp. 843-851 ◽  
Author(s):  
G Brooke ◽  
A W Wolfendale
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Momentum Spectrum ◽  
Momentum Range

Primary cosmic-ray nucleon spectrum from the sea-level muon spectrum using the scaling model

1979 ◽  
Vol 5 (3) ◽  
pp. 445-456 ◽  
Author(s):  
A K Das ◽  
A K De
Keyword(s):  
Sea Level ◽  
Cosmic Ray ◽  
Muon Spectrum ◽  
Scaling Model ◽  
Nucleon Spectrum
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