A survey on the recent measurements of the absolute vertical cosmic-ray muon flux at sea level

Allkofer, O. C.; Jokisch, H.

doi:10.1007/bf02734678

Cited by 24 publications

(6 citation statements)

References 27 publications

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“…The neutron modulation was determined from a study of the data from 35 neutron monitors around the globe [16] using similar methods to those described in [17]. A fit to the measurements of the peak to peak modulation versus SSN gives ∆N/N = 1.15 10 −3 − 0.061 10 −3 • V per SSN, where V is the VRCO The muon modulation is a factor 3 lower than this [18] due to the higher primary energy needed to produce muons. Ionization is also produced from the electromagnetic component of CR whose long term modulation has not been measured.…”

Section: The Correlation Between Cosmic Rays (Cr) and Low Cloud Cover...mentioning

confidence: 99%

Testing the proposed causal link between cosmic rays and cloud cover

Sloan

Wolfendale

2008

Environ. Res. Lett.

107

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A decrease in the globally averaged low level cloud cover, deduced from the ISCCP infrared data, as the cosmic ray intensity decreased during the solar cycle 22 was observed by two groups. The groups went on to hypothesize that the decrease in ionization due to cosmic rays causes the decrease in cloud cover, thereby explaining a large part of the currently observed global warming. We have examined this hypothesis to look for evidence to corroborate it. None has been found and so our conclusions are to doubt it. From the absence of corroborative evidence, we estimate that less than 23%, at the 95% confidence level, of the 11 year cycle change in the globally averaged cloud cover observed in solar cycle 22 is due to the change in the rate of ionization from the solar modulation of cosmic rays.

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Section: The Correlation Between Cosmic Rays (Cr) and Low Cloud Cover...mentioning

confidence: 99%

Testing the proposed causal link between cosmic rays and cloud cover

Sloan

Wolfendale

2008

Environ. Res. Lett.

107

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“…Only a few experiments have been performed at low latitudes near the equator, showing the expected reduction of the muon intensity in the low-energy region. The measured latitude effect includes the geomagnetic effect on the production spectrum of muons and the atmospheric latitude effect on their survival probability.The latitude dependence of the sea level muon flux has been considered byAllkofer and Jokisch [1973]. Measurements performed at Kiel (high latitude) and at the equator with the same spectrograph allow us to obtain the effect without any experimental bias[Allkofer et al, 1975].Figure 4gives the ratio of the muon intensity at low latitude (equator) to that at high latitude (---45øN)…”

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confidence: 99%

Flux of the vertical negative muons stopping at depths 0.35–1000 hg/cm²

Bilokon¹,

Castagnoli²,

Castellina³

et al. 1989

J. Geophys. Res.

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The vertical negative muon stopping rate at depths 0.35–1000 hg/cm2 of standard rock has been evaluated by means of a Monte Carlo simulation of the muon transport underground. The muon energy losses take into account both continuous (ionization and pair production) and stochastic (bremmstrahlung and nuclear interaction) processes. The dependence of the charge ratio μ+/μ− on the muon momentum is included. The effect of muon multiple scattering has been estimated. Results are given both for high‐latitude and equatorial sites, and they are compared to previous calculations and to experimental data.

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“…Considering the first derivative of this I (E min ) relationship (using the best linear fit on three consecutive points delimiting a small energy interval), we deduced the muon differential flux values reported in Figure 9. Experimental data measured in other published works [3,4,5] are also shown for comparison. Our values ideally complete the muon spectrum in an energy domain where only a few and sparse data were previously reported, especially below 200 MeV.…”

Section: Experimental Results: Sea Level Measurementsmentioning

confidence: 99%

“…An abundant literature exists for muons at ground level and underground but the overwhelming majority of works rather concerns high-energy physics with energy ranges above a few GeV and beyond [2]. Literature surveys on atmospheric muons [2][3][4][5][6][7] show that there is a clear lack of experimental data typically below a few hundred MeV. In another field of interest, i.e.…”

Section: Introductionmentioning

confidence: 99%

A water tank muon spectrometer for the characterization of low energy atmospheric muons

Munteanu

Moindjie

Autran

2019

Nuclear Instruments and Methods in Physics Research Section A:

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In this work, a water tank muon spectrometer was designed, assembled and operated to measure the energy distribution of low energy atmospheric muon flux induced by cosmic-rays at sea level in the energy range 100-500 MeV. The principle of this experiment is to use water as muon moderator inserted between two coincidence detectors to select the cutoff energy below which muons can no longer be detected. The differential and integral muon spectra are then derived from successive measurements by varying the liquid height within the water tank. The instrument was entirely characterized and modeled in terms of detector efficiency, cutoff energy and counting rate. Experimental data are reported for the energy distribution of muon flux at sea level (43°N of latitude) and finally compared with literature survey.

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A survey on the recent measurements of the absolute vertical cosmic-ray muon flux at sea level

Cited by 24 publications

References 27 publications

Testing the proposed causal link between cosmic rays and cloud cover

Testing the proposed causal link between cosmic rays and cloud cover

Flux of the vertical negative muons stopping at depths 0.35–1000 hg/cm²

A water tank muon spectrometer for the characterization of low energy atmospheric muons

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A survey on the recent measurements of the absolute vertical cosmic-ray muon flux at sea level

Cited by 24 publications

References 27 publications

Testing the proposed causal link between cosmic rays and cloud cover

Testing the proposed causal link between cosmic rays and cloud cover

Flux of the vertical negative muons stopping at depths 0.35–1000 hg/cm2

A water tank muon spectrometer for the characterization of low energy atmospheric muons

Contact Info

Product

Resources

About

Flux of the vertical negative muons stopping at depths 0.35–1000 hg/cm²