Measurement of the stopping power for ?? and ?+ at energies between 3 keV and 100 keV

Wojciechowski, Piotr; Baumann, P.; Daniel, H.; Hartmann, F. J.; Herrmann, Ch.; Mühlbauer, M.; Schott, W.; Fuchs, A.M.; Hauser, Peter C.; Lou, K.; Petitjean, C.; Taqqu, D.; Kottmann, F.

doi:10.1007/bf01027952

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…for v in the vicinity of the stopping power maximum, the ratio of the p stopping power to the corresponding stopping power of protons is considerably smaller than unity. A similar behaviour, commonly referred to as the Barkas effect [6], has been observed already in the stopping power in solid targets [7,8] and was also found in total cross sections for single ionization by protons and antiprotons in gas targets [9,10]. The Barkas effect reflects the polarization of the target electron cloud due to the attraction (repulsion) exerted on the cloud when the proton (antiproton) passes by at larger distances from the target nucleus.…”

Section: Introductionsupporting

confidence: 68%

Comprehensive analysis of the stopping power of antiprotons and negative muons in He and gas targets

Schiwietz¹,

Wille²,

Muiño³

et al. 1996

J. Phys. B: At. Mol. Opt. Phys.

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A comprehensive analysis of the stopping power of antiprotons and negative muons in He and gas targets for projectile velocities (equivalent antiproton energies) ranging from about 0.1 to 10 au (0.25 keV to 2.5 MeV) is performed. Recent experimental data are contrasted with theoretical results obtained from different approaches. The electronic stopping power is evaluated within the coupled-state atomic-orbital method and the distorted-wave Born approximation as well as, for low projectile velocities, within a generalized adiabatic-ionization model that takes into account collisional-broadening effects. The departure of the antiproton stopping power from the proton stopping power (`Barkas effect'), observed for intermediate projectile velocities, is discussed. The contribution to the stopping power arising from energy transfer to the translational degrees of freedom of the target system (`nuclear stopping') is evaluated. Our analysis results in a good understanding of the stopping mechanisms of negative heavy particles in gases, in particular in He. Discrepancies between theory and experiment in the case are attributed to effects of the molecular structure of the target.

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Section: Introductionsupporting

confidence: 68%

Comprehensive analysis of the stopping power of antiprotons and negative muons in He and gas targets

Schiwietz¹,

Wille²,

Muiño³

et al. 1996

J. Phys. B: At. Mol. Opt. Phys.

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“…Ref. [21] reports the results of measurements of the energy loss of low-energy muons in thin layers of carbon and gold. Using their data we obtained that muons with initial momentum p =1.94 MeV/c (the mean exit momentum for the 20 keV muons launched on the 3.5 µ g cm −2 carbon backing) cross the 10 µm thick gold foil with final momentum p ′ = 1.75 MeV/c, while eq.…”

Section: Jinst 11 P03019mentioning

confidence: 99%

Low-energy negative muon interaction with matter

et al. 2016

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Using simulated data, obtained with the FLUKA code, we derive empirical regularities about the propagation and stopping of low-energy negative muons in hydrogen and selected solid materials. The results are intended to help the preliminary stages of the set-up design for experimental studies of muon capture and muonic atom spectroscopy. Provided are approximate expressions for the parameters of the the momentum, spatial and angular distribution of the propagating muons. In comparison with the available data on the stopping power and range of muons (with which they agree in the considered energy range) these results have the advantage to also describe the statistical spread of the muon characteristics of interest.

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