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1

Digitale Medien

^7Li(p, α)^4He reaction with polarized protons from 0.8 to 3 MeV

Petitjean, C. ; Brown, L.

Amsterdam : Elsevier

Nuclear Physics, Section A 111 (1968), S. 177-183

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ISSN: 0375-9474

Schlagwort(e): Natural target ; ^7Li(polarized p, α), E = 0.8-3.0 MeV; measured σ (E;θ); deduced

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1016/S0375-9474(68)90678-7

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2

Digitale Medien

^7Li(p, α)^4He reaction with polarized protons from 0.8 to 3 MeV

Petitjean, C. ; Brown, L.

Amsterdam : Elsevier

Nuclear Physics, Section A 111 (1968), S. 177-183

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Details

ISSN: 0375-9474

Schlagwort(e): Natural target ; ^7Li(polarized p, α), E = 0.8-3.0 MeV; measured σ (E;θ); deduced

Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002

Thema: Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1016/S0375-9474(68)90678-7

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3

Digitale Medien

Measuring sticking and stripping in muon-catalyzed dt fusion with multilayer thin films (1996)

Fujiwara, M. C. ; Bailey, J. M. ; Beer, G. A. ; [weitere]

Springer

Hyperfine interactions 101-102 (1996), S. 613-621

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ISSN: 1572-9540

Schlagwort(e): muon catalyzed fusion ; sticking ; stripping ; multilayer film

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We propose a direct measurement of muon sticking to alpha particles in muon-catalyzed dt fusion at a high density. Exploiting the features of a multilayer thin-film target developed at TRIUMF, the sticking is determined directly by detection of charged fusion products. Experimental separation of initial sticking and stripping may become possible for the first time. Monte Carlo simulations, as well as preliminary results of test measurements are described.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02227674

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4

Digitale Medien

Hydrogen/deuterium-mixtures as a laboratory for the study of the muonic cascade and muon-catalyzed fusion (1999)

Lauss, B. ; Ackerbauer, P. ; Breunlich, W.H. ; [weitere]

Springer

Hyperfine interactions 118 (1999), S. 79-88

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ISSN: 1572-9540

Schlagwort(e): exotic atom ; cascade ; q1s ; hyperfine transition ; molecular formation ; muon-catalyzed fusion

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract We have performed an experiment to investigate various processes induced by muons in hydrogen-deuterium mixtures. Preliminary results are given for cascade X-ray yields, q1s, relative yields of conversion muons and fusion γ-rays, molecular formation and hyperfine transition rates.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012684503009

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5

Digitale Medien

Resonant formation measurements of $$dt\mu $$ via time of flight (1999)

Marshall, G.M. ; Porcelli, T.A. ; Adamczak, A. ; [weitere]

Springer

Hyperfine interactions 118 (1999), S. 89-101

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ISSN: 1572-9540

Schlagwort(e): muon catalyzed fusion ; resonant formation ; muonic atoms ; muonic hydrogen ; exotic atoms

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Solid hydrogen in the form of an inhomogeneous layered target offers several experimental advantages when compared with liquid or gas. Beams of non-thermalized muonic hydrogen atoms allow us to explore resonant molecular ion formation processes near eV kinetic energies. Isotopically specific layers make it possible to separate competing and confusing interactions and to employ the time of flight for comparison with predictions based on theoretical energy dependences. Unambiguous charged fusion product detection simplifies absolute intensity measurements. The systematic uncertainties encountered in resonant molecular ion formation measurements, using solid hydrogen target layers, are being investigated with simulations which use the many calculated energy-dependent rates and cross-sections which are now available. The importance of the rates for processes such as muon transfer and elastic scattering are discussed, and results of some recent analyses are presented.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012636619847

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6

Digitale Medien

Time-of-flight spectroscopy of muonic tritium (1999)

Fujiwara, M.C. ; Adamczak, A. ; Bailey, J.M. ; [weitere]

Springer

Hyperfine interactions 118 (1999), S. 151-157

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ISSN: 1572-9540

Schlagwort(e): muonic hydrogen ; muon catalyzed fusion ; Ramsauer-Townsend effect

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Emission of muonic tritium from a solid hydrogen layer has been studied via imaging of the muon-decay electrons and the time-of-flight distributions have been compared with detailed Monte Carlo calculations. Results are consistent at the 10% level with the theoretical prediction of a Ramsauer-Townsend minimum cross-section energy.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012653023482

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7

Digitale Medien

Study of μ-catalyzed fusion in H-D mixtures (1999)

Olin, A. ; Adamczak, A. ; Beer, G.A. ; [weitere]

Springer

Hyperfine interactions 118 (1999), S. 163-170

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ISSN: 1572-9540

Schlagwort(e): muon catalyzed fusion ; astrophysical S-factor ; muonic molecule

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Muon-catalyzed fusion was first observed in the pdμ system, and remains a good test of our understanding of the underlying molecular and nuclear processes. In contrast to the ddμ and dtμ systems, no resonant behavior is expected, which considerably simplifies the dynamics. We will discuss data taken with solid H-D mixtures of 0.05%, 2%, 15% and 75% D2. In these measurements we observed simultaneously muons from pdμ→μ+ 3He and γs from pdμ→μ 3He + γ. A simulation code incorporating the relevant physics processes has been developed for the analysis of this data. Preliminary results are presented for the fusion and molecular formation rates. This new data stringently tests the currently-accepted fusion scheme. A new value of the astrophysical S-factor is derived.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012657124390

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8

Digitale Medien

Measurement of the fusion rate in μd3He (1999)

Del Rosso, A. ; Augsburger, M. ; Boreiko, V.F. ; [weitere]

Springer

Hyperfine interactions 118 (1999), S. 177-182

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ISSN: 1572-9540

Schlagwort(e): exotic atoms ; muon catalyzed fusion

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Many atomic and molecular processes may occur after a muon has been stopped in a mixture of hydrogen and helium isotopes. In particular, the muonic molecule μd3He can be formed. This molecule either decays or undergoes muon catalyzed fusion. Theory predicts a fusion rate much lower than the decay rate; moreover, the various theoretical predictions differ from each other by several orders of magnitude. With the experiment presented here we intend to measure the effective fusion rate via the detection of the 14.7 MeV fusion proton. A new target and gas mixing system, designed at JINR, were used in a ten-day test run at PSI. The fusion protons and products from other transfer and background reactions were measured with several different detectors (plastic scintillators, BGO, Germanium, neutron, and Silicon detectors). The formation rate of the μd 3He molecule and an upper limit for the effective fusion rate have been measured and are presented here.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012661325299

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9

Digitale Medien

Muon transfer from ground state deuterium to helium nuclei and its temperature dependence (1999)

Gartner, B. ; Ackerbauer, P. ; Augsburger, M. ; [weitere]

Springer

Hyperfine interactions 119 (1999), S. 103-108

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ISSN: 1572-9540

Schlagwort(e): muon transfer ; exotic atom ; muonic molecule

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The energy and time distributions of the decay X-rays of excited, metastable, molecular (dµHe)*-resonances were measured. The comparison of the observed energy spectra with calculated ones suggests that decay from the rotational state J = 1 dominates at the investigated conditions. The muon transfer rates from ground state deuterium to the helium isotopes 3He and 4He at low temperatures were determined from the time distributions of these spectra. Additionally, the temperature dependence of the muon transfer rate was clearly established in deuterium / 4He mixtures.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012614804343

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10

Digitale Medien

Kinetic energies of exotic H atoms at formation and cascade (1999)

Kottmann, F. ; Daniel, H. ; Hartmann, F.J. ; [weitere]

Springer

Hyperfine interactions 119 (1999), S. 3-10

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ISSN: 1572-9540

Schlagwort(e): exotic atom ; cascade

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract The complex balance of processes occurring at the cascade of exotic H-atoms is usually described by the so-called standard cascade model, but this model neglects variations of the kinetic energy T of the exotic atom during the cascade which are crucial for the analysis of several important experiments. New experimental results on T µp at H2 pressures between 0.063 and 4 hPa demonstrate the importance of acceleration due to Coulomb de-excitation processes at highly excited µp levels n 〉 9. The data at the lowest density are sensitive to the initial values of the kinetic energy and n-levels at the moment of atomic capture. From the measured low-energy tail of the T µp-distribution it can be concluded that a considerable part of the µp(2s) atoms is metastable at pressures of a few hPa.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1012651231659

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