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Measurement of the absolute vertical integral and differential cosmic-ray single-muon flux at 3.6 GeV and a measurement of the showerless penetrating particle-pair flux above 3.6 GeV

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Il Nuovo Cimento B (1971-1996)

Summary

We have measured the absolute vertical integral and differential cosmic-ray single-muon flux at 3.6 GeV. The apparatus consisted of two 100 in. high iron absorbers placed between large counter arrays. The iron absorbers could be magnetized with current-carrying coils wrapped around term. The differential flux was obtained from flux measurements at different magnetic-field values. Adjacent counters were used to correct the data for cosmic-ray showers and to provide parallel counter telescopes to look for penetrating pairs due to μ,’s or quarks. The measured integral flux at 3.6GeV was (1.83±0.4).10-3/cm2.sr.s, and the differential flux was (l.28±0.25).10-3cm-2.sr.GeV.s. The showerless μ-pair flux was measured to be (0.58.10-6±0.58.10-5)/cm2.sr.s for pairs between 0in. and 30 in. apart, and (1.68 -10-6 ±1.68. 10-5)/cm2.sr.s for pairs between 30 in. and 60 in.

Riassunto

Si è misurato il flusso assoluto verticale integrale e differenziale dei singoli muoni della radiazione cosmica a 3.6 GeV. L’apparato era costituito da due assorbitori di ferro alti 100in., disposti tra grandi schiere di contatori. Gli assorbitori di forro potevano essere magnetizzati mediante spire conduttrici avvolte attorno ad essi. Il flusso differenziale si ottieno da misure di flusso per diversi valori del campo magnetico. Contatori adiacenti furono impiegati per eorreggere i dati per gli sciami di raggi cosmici e fare in modo che contatori telescopici paralleli potessero rivelare le coppie penetranti dovute a muoni e quark. Il flusso integrale misurato a 3.6 GeV risultö pari a (1.83±0.4)-10-3/cm2.sr.s e quello diflerenziale pari a (1.28 ± 0.25) .10-3/cm2.sr.GeV.s. Il flusso di coppie muoni che senza sciami risultò alla misura pari a (0.58 .10-6 ± ±0.58).10-5/cm2.sr.s per coppie distanti tra 0 in. e 30 in. e (1.68.10-6 ± 1.68.10-5)/cm2· ·sr·s per coppie tra 30 in. e 60 in.

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Authors and Affiliations

  1. Department of Physics, Lehigh University, Bethlehem, Pa.

    A. S. Kanofsky

  2. Brookhaven National Laboratory, Upton, N. Y.

    A. S. Kanofsky

  3. Department of Physics, Joseph Henry Laboratories, Princeton University, Princeton, N. J.

    P. C. Colter

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  1. A. S. Kanofsky
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  2. P. C. Colter
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Work supported in part by the Atomic Energy Commission.

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Kanofsky, A.S., Colter, P.C. Measurement of the absolute vertical integral and differential cosmic-ray single-muon flux at 3.6 GeV and a measurement of the showerless penetrating particle-pair flux above 3.6 GeV. Nuov Cim B 17, 219–228 (1973). https://doi.org/10.1007/BF02906443

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  • DOI: https://doi.org/10.1007/BF02906443

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