MEASUREMENT OF THE ABSOLUTE VERTICAL INTENSITY AND MOMENTUM SPECTRUM OF COSMIC-RAY MUONS AT SEA LEVEL OF BEIJING DISTRICT

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Second Experimental Group of the Institute of High Energy Physics. MEASUREMENT OF THE ABSOLUTE VERTICAL INTENSITY AND MOMENTUM SPECTRUM OF COSMIC-RAY MUONS AT SEA LEVEL OF BEIJING DISTRICT[J]. Chinese Physics C, 1983, 7(4): 401-407.
Second Experimental Group of the Institute of High Energy Physics. MEASUREMENT OF THE ABSOLUTE VERTICAL INTENSITY AND MOMENTUM SPECTRUM OF COSMIC-RAY MUONS AT SEA LEVEL OF BEIJING DISTRICT[J]. Chinese Physics C, 1983, 7(4): 401-407. shu
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Received: 1900-01-01
Revised: 1900-01-01
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MEASUREMENT OF THE ABSOLUTE VERTICAL INTENSITY AND MOMENTUM SPECTRUM OF COSMIC-RAY MUONS AT SEA LEVEL OF BEIJING DISTRICT

  • Second Experimental Group of the Institute of High Energy Physics

Abstract: The absolute vertical intensity and momentum spectrum of cosmic-ray muons at sea level of Beijing district has measured with a range spectrometer composed by a counter telescope system of four large area scintillation counters (two plastic and two liquid scintillators) and a pile of Pb absorber. In addition, a 70×50×30cm3 streamer chamber was used as a track detector for shower rejection. The integral spectrum of the momentum was measured from 0.2GeV/c to 1.3 GeV/c. The integral flux at 0.3 GeV/c is 9.2××10-3sr-1cm-2s-1. The ratio of shower rejection is about 30% obtained by scanning streamer tracks from 1.6×104 photographs.

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