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2. Precise Measurement of Muon Capture on the Proton

Author

Kammel, P., Andreev, V. A., Balin, D. V., Carey, R. M., Case, T., Chitwood, D. B., Clayton, S. M., Crowe, K. M., Deutsch, J., Debevec, P. T., Dick, P. U., Dijksman, A., Egger, J., Fahrni, D., Fetisov, A. A., Freedman, S. J., Ganzha, V. A., Gartner, B., Govaerts, J., Gray, F. E., Hartmann, F. J., Herold, W. D., Hertzog, D. W., Jatsoura, V. I., Krivshich, A. G., Lauss, B., Maev, E. M., Maev, O. E., Markushin, V. E., Onderwater, C. J. G., Petitjean, C., Petrov, G. E., Polly, C. C., Prieels, R., Sadetsky, S. M., Schapkin, G. N., Schmidt, R., Semenchuk, G. G., Soroka, M., Vorobyov, A. A., and Voropaev, N. I.

Published
2001
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3. μCF Experiments in D2 and HD Gases – Final Results

Author

Voropaev, N. I., Balin, D. V., Breunlich, W. H., Case, T., Crowe, K. M., Faifman, M. P., Gartner, B., Hartmann, F. J., Kammel, P., Lauss, B., Maev, E. M., Markushin, V. E., Petitjean, C., Petrov, G. E., Schapkin, G. N., Semenchuk, G. G., Vorobyov, A. A., and Zmeskal, J.

Published
2001
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4. Development of a New Experimental Method for Studies of Muon Capture in Hydrogen

Author

Maev, E. M., Andreev, V. A., Case, T. A., Crowe, K. M., Dick, P. U., Dijksman, A., Egger, J., Fahrni, D., Fetisov, A. A., Ganzha, V. A., Hartmann, F. J., Kammel, P., Krivchitch, A. G., Maev, O. E., Petitjean, C., Petrov, G. E., Prieels, R., Sadetsky, S. M., Schapkin, G. N., Schmidt, R., Semenchuk, G. G., Soroka, M., Vorobyov, A. A., and Voropaev, N. I.

Published
2001
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6. Final results on the μ3He-capture experiment and perspectives for μ p-capture studies

Author

Vorobyov, A.A., Ackerbauer, P., Adamczak, A., Andreev, V.A., Balin, D.V., Beer, G.A., Breunlich, W.H., Case, T., Crowe, K.M., Daniel, H., Deutsch, J., Dick, P.U., Dijksman, A., Egger, J., von Egidy, T., Faifman, M.P., Fetisov, A.A., Ganzha, V.A., Govaerts, J., Gusev, V.V., Hartmann, F.J., Herold, W.D., Kammel, P., Krivshich, A.G., Lauss, B., Maev, E.M., Markushin, V.E., Martino, J., Marton, J., Menshikov, L.I., Mühlbauer, M., Petitjean, C., Petitjean, T., Petrov, G.E., Ponomarev, L.I., Prieels, R., Prymas, W., Schapkin, G.N., Schöps, W., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., and Voropaev, N.I.

Published
1999
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7. Search for muon catalyzed d 3He-fusion

Author

Maev, E.M., Balin, D.V., Case, T., Crowe, K.M., Del Rosso, A., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, O.E., Mühlbauer, M., Mulhauser, F., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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8. First observation of spin flip in dμ-atoms via formation and back decay of ddμ molecules

Author

Voropaev, N.I., Balin, D.V., Breunlich, W.N., Case, T., Crowe, K.M., Daniel, H., Ganzha, V.A., Gartner, B., Hartmann, F.J., Kammel, P., Kozlov, S.M., Lauss, B., Maev, E.M., Markushin, V.E., Misko, Yu.A., Mühlbauer, M., Petitjean, C., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Trofimov, V.A., Vasiliev, A.A., Vorobyov, A.A., and Zmeskal, J.

Published
1999
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9. Measurement of the muon transfer rate from deuterium to 3 at low temperature

Author

Maev, E.M., Balin, D.V., Case, T., Crowe, K.M., Del Rosso, A., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, O.E., Mühlbauer, M., Mulhauser, F., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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10. Insights on d μ t sticking from d μ d stripping and μ,3He capture

Author

Case, T., Balin, D.V., Breunlich, W.H., Crowe, K.M., Daniel, H., Gartner, B., Hartmann, F.J., Kammel, P., Lauss, B., Maev, E.M., Markushin, V.E., Mühlbauer, M., Petitjean, C., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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11. Study of muon catalyzed dd-fusion in HD gas

Author

Semenchuk, G.G., Balin, D.V., Case, T., Crowe, K.M., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, E.M., Mühlbauer, M., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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12. Muon catalyzed fusion in deuterium gas

Author

Petitjean, C., Balin, D.V., Breunlich, W.H., Case, T., Crowe, K.M., Daniel, H., Faifman, M.P., Ganzha, V.A., Gartner, B., Hartmann, F.J., Kammel, P., Kozlov, S., Lauss, B., Maev, E.M., Markushin, V.E., Misko, Yu.A., Mühlbauer, M., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Trofimov, V.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Published
1999
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13. Precision measurement of nuclear muon capture by3He

Author

Vorobyov, A. A., Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Voropaev, N. I., Deutsch, J., Govaerts, J., Prieels, R., Ackerbauer, P., Breunlich, W. H., Kammel, P., Lauss, B., Marton, J., Prymas, W., Egger, J., Petitjean, C., Petitjean, Th., van den Brandt, B., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., von Egidy, T., Wojciechowski, P., Case, T., Crowe, K. M., Markushin, V. E., and Beer, G. A.

Published
1996
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14. New precision measurements of dµd fusion

Author

Petitjean, C., Ackerbauer, P., Balin, D. V., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., von Egidy, T., Gartner, B., Hartmann, F. J., Kammel, P., Kminek, G., Lauss, B., Maev, E. M., Markushin, V. E., Marton, J., Mühlbauer, M., Petrov, G. E., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., and Zmeskal, J.

Published
1996
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15. Measurement of the heavy neutrino admixture upper limit from muon capture by3He

Author

Schott, W., Müller, S., Daniel, H., Ackerbauer, P., Balin, D. V., Baturin, V. N., Beer, G. A., Breunlich, W. H., Case, T., Crowe, K. M., Deutsch, J., Egger, J., von Egidy, T., Govaerts, J., Grigoriev, Yu. S., Hartmann, F. J., Kammel, P., Lauss, B., Maev, E. M., Markushin, V., Marton, J., Mühlbauer, M., Petitjean, C., Petitjean, T., Petrov, G. E., Prieels, R., Prymas, W., Semenchuk, G. G., Smirenin, Yu. V., Van den Brandt, B., Vorobyov, A. A., Voropaev, N. I., and Wojciechowski, P.

Published
1996
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16. Measurement of the breakup channels in nuclear muon capture by3He and4He

Author

Maev, E. M., Ackerbauer, P., Balin, D. V., Baturin, V. N., Beer, G. A., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., Deutsch, J., von Egidy, T., Govaerts, J., Grigoriev, Yu. S., Hartmann, F. J., Kammel, P., Lauss, B., Marton, J., Mühlbauer, M., Petitjean, C., Petitjean, Th., Petrov, G. E., Prieels, R., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., and Wojciechowski, P.

Published
1996
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17. A new project for the investigation of unsolved problems of ddµ and pdµ catalysis in D2 and H/D mixtures

Author

Semenchuk, G. G., Balin, D. V., Baturin, V. N., Ganzha, V. A., Kozlov, S. M., Maev, E. M., Misko, Yu. A., Petrov, G. E., Smirenin, Yu. V., Schapkin, G. N., Trofimov, V. A., Vasiliev, A. A., Vorobyov, A. A., Voropaev, N. I., Ackerbauer, P., Breunlich, W. H., Gartner, B., Kammel, P., Lauss, B., Marton, J., Prymas, W., Steininger, E., Zmeskal, J., Petitjean, C., Brunnhuber, A., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., von Egidy, T., Case, T., and Crowe, K.

Published
1996
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20. Final dt stickingω s using the “survived moun method”

Author

Lou, K., Balin, D. V., Baturin, V. N., Baumann, P., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., Grigoriev, Yu. S., Hartmann, F. J., Ilyin, A. I., Jeitler, M., Kammel, P., Lauss, B., Marton, J., Mühlbauer, M., Petitjean, C., Petrov, G. E., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Wojciechowski, P., and Zmeskal, J.

Published
1993
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21. Survey of experimental results on μCF including hyperfine effects

Author

Ackerbauer, P., Breunlich, W. H., Fuchs, M., Fussy, S., Jeitler, M., Kammel, P., Lauss, B., Marton, J., Prymas, W., Werner, J., Zmeskal, J., Lou, K., Petitjean, C., Baumann, P., Daniel, H., Hartmann, F. J., Schott, W., von Egidy, T., Wojciechowski, P., Chatellard, D., Egger, J. P., Jeannet, E., Case, T., Crowe, K. M., Sherman, R. H., and Markushin, V.

Published
1993
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22. Systematic analysis of the PSI experiment to directly measure the sticking probabilityω s in dt fusion

Author

Case, T., Crowe, K. M., Lou, K., Petitjean, C., Breunlich, W. H., Jeitler, M., Kammel, P., Lauss, B., Marton, J., Prymas, W., Zmeskal, J., Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Ilyin, A. I., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., Baumann, P., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., and Wojciechowski, P.

Published
1993
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23. Experimental survey of the sticking problem in muon catalyzed dt fusion

Author

Petitjean, C., Balin, D. V., Baturin, V. N., Baumann, P., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., Grigoriev, Yu. S., Hartmann, F. J., Ilyin, A. I., Jeitler, M., Kammel, P., Lauss, B., Lou, K., Maev, E. M., Marton, J., Mühlbauer, M., Petrov, G. E., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., Wojciechowski, P., and Zmeskal, J.

Published
1993
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24. μCF Experiments in D2and HD Gases – Final Results

Author

Voropaev, N., Balin, D., Breunlich, W., Case, T., Crowe, K., Faifman, M., Gartner, B., Hartmann, F., Kammel, P., Lauss, B., Maev, E., Markushin, V., Petitjean, C., Petrov, G., Schapkin, G., Semenchuk, G., Vorobyov, A., and Zmeskal, J.

Abstract

During 1994–1996, a series of μCF experiments were performed at PSI by the PSI-PNPI-IMEP-LBNL-TUM collaboration. These experiments aimed at high-precision studies of the d–μ–d fusion in D2and HD gases in a wide temperature range. The Gatchina ionization time projection chamber has been used to detect the dd-fusion reaction products. The main parameters of the d–μ–d fusion have been measured with high absolute precision. In this report, we present the results of the final analysis of the experimental data. The obtained results are compared with the calculations based on a recent μCF-theory.

Published
2001
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25. Insights on d μ tsticking from d μ dstripping and μ,3He capture

Author

Case, T., Balin, D.V., Breunlich, W.H., Crowe, K.M., Daniel, H., Gartner, B., Hartmann, F.J., Kammel, P., Lauss, B., Maev, E.M., Markushin, V.E., Mühlbauer, M., Petitjean, C., Petrov, G.E., Prymas, W., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Abstract

Data from the recent PSI high statistics experiment on d μ dfusion are used to measure the stripping process in d μ d→n+μ,3He and test current calculations of the stripping process. The PSI results in μ3He capture are also used to remove a troubling background from this measurement. Combination of these results with the old dμ tsticking analysis slightly raise and improve that result to ωs= (0.58± 0.04)% and indicate that theory and experiment can meet if theoretical stripping is increased only at the beginning of the track. This conclusion is in accord with the new stripping calculations where excited state stripping is increased significantly.

Published
1999
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26. Measurement of the muon transfer rate from deuterium to 3at low temperature

Author

Maev, E.M., Balin, D.V., Case, T., Crowe, K.M., Del Rosso, A., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, O.E., Mühlbauer, M., Mulhauser, F., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Abstract

The muon transfer rate $$(\tilde \lambda _{d{\text{ }}^{\text{3}} {\text{He}}} )$$ from deuterium to 3at temperatures of 39.5 K and 50.0 K, respectively, has been determined as a by-product of the experiment aimed to search for muon catalyzed d3He-fusion. The measurements were performed in the muon beam at PSI with a multi-anode high pressure ionization chamber as a target and detector of the incoming muons and the charged reaction products. The chamber was filled with the HD + 3He(5.6%) gas mixture of 9.21% LHD density. The analysis of time distributions of dd-fusion events was able to determine the transfer rates: $$\tilde \lambda _{d{\text{ }}^{\text{3}} {\text{He}}} $$ (50 K)=(2.32± 0.09)× 108s-1, $$\tilde \lambda _{d{\text{ }}^{\text{3}} {\text{He}}} $$ (39.5 K)=(2.33± 0.16)·108s-1. These values, normalized to liquid hydrogen density (LHD, 4.25· 1022atoms/cm3), significantly exceed the transfer rates at room temperature, in agreement with theoretical predictions.

Published
1999
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27. Search for muon catalyzed d3He-fusion

Author

Maev, E.M., Balin, D.V., Case, T., Crowe, K.M., Del Rosso, A., Ganzha, V.A., Hartmann, F.J., Kozlov, S.M., Lauss, B., Maev, O.E., Mühlbauer, M., Mulhauser, F., Petitjean, C., Petrov, G.E., Sadetsky, S.M., Schapkin, G.N., Schott, W., Semenchuk, G.G., Smirenin, Yu.V., Soroka, M.A., Vasiliev, A.A., Vorobyov, A.A., Voropaev, N.I., and Zmeskal, J.

Abstract

We report on the results of an experiment aimed at observing muon-catalyzed d3He-fusion with a setup previously used for studies of the muon-catalyzed dd-fusion. The basic element of the setup is a high pressure ionization chamber operating as an active target. In this experiment the chamber was filled with an HD + 3He (5.6%) gas mixture at 13.2 bar pressure and 50 K temperature. These conditions were chosen as optimal for formation of the 3Heμd-molecules with a low level of background from the d-μ-dfusion. The chamber was exposed to the negative muon beam at PSI. During a 3-week data-taking period, 9.7 × 108muon stops have been selected. The analysis of the data was able to determine a new upper limit for the d3He-fusion rate in the 3Heμd-molecule (λf≤ 6× 104s-1), which is more than three orders of magnitude lower than the previously existed limit.

Published
1999
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28. Precision measurement of nuclear muon capture by3He

Author

Vorobyov, A., Balin, D., Baturin, V., Grigoriev, Yu., Maev, E., Petrov, G., Semenchuk, G., Smirenin, Yu., Voropaev, N., Deutsch, J., Govaerts, J., Prieels, R., Ackerbauer, P., Breunlich, W., Kammel, P., Lauss, B., Marton, J., Prymas, W., Egger, J., Petitjean, C., Petitjean, Th., van den Brandt, B., Daniel, H., Hartmann, F., Mühlbauer, M., Schott, W., von Egidy, T., Wojciechowski, P., Case, T., Crowe, K., Markushin, V., and Beer, G.

Abstract

Abstract: In this article we report the results of an experiment performed in 1993 at PSI. The goal was to determine the absolute rate of nuclear muon capture by3He. In the experiment we used a new technique recently developed at Gatchina. As a preliminary result from this experiment we obtainedlambdac=(1496±3(stat)-3(syst)) s–1.

Published
1996
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29. Measurement of the heavy neutrino admixture upper limit from muon capture by3He

Author

Schott, W., Müller, S., Daniel, H., Ackerbauer, P., Balin, D., Baturin, V., Beer, G., Breunlich, W., Case, T., Crowe, K., Deutsch, J., Egger, J., von Egidy, T., Govaerts, J., Grigoriev, Yu., Hartmann, F., Kammel, P., Lauss, B., Maev, E., Markushin, V., Marton, J., Mühlbauer, M., Petitjean, C., Petitjean, T., Petrov, G., Prieels, R., Prymas, W., Semenchuk, G., Smirenin, Yu., Van den Brandt, B., Vorobyov, A., Voropaev, N., and Wojciechowski, P.

Abstract

Abstract: The triton energy spectrum of the muon capture reaction µ3Herarrt+ngrµ where µ3He is the ground state of muonic3He, has been measured by means of a high-pressure ionization chamber in order to investigate a possible heavyv admixture into the µ flavor with high sensitivity. The upper limit of the µ-heavy vi mixing matrix element squared was obtained to be midUµimid2les10–3 for heavy neutrino masses in the range of 25les E0Vles75 MeV.

Published
1996
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30. A new project for the investigation of unsolved problems of ddµ and pdµ catalysis in D2 and H/D mixtures

Author

Semenchuk, G., Balin, D., Baturin, V., Ganzha, V., Kozlov, S., Maev, E., Misko, Yu., Petrov, G., Smirenin, Yu., Schapkin, G., Trofimov, V., Vasiliev, A., Vorobyov, A., Voropaev, N., Ackerbauer, P., Breunlich, W., Gartner, B., Kammel, P., Lauss, B., Marton, J., Prymas, W., Steininger, E., Zmeskal, J., Petitjean, C., Brunnhuber, A., Daniel, H., Hartmann, F., Mühlbauer, M., Schott, W., von Egidy, T., Case, T., and Crowe, K.

Abstract

Abstract: We propose to study a number of open problems in ddµ and pdµ fusion using the new high-pressure ionization chamber for charged particle identification in coincidence with the n-/e-counter array for the detection of neutrons and µ-decay electrons. Our first objective will be a precise measurement of the absolute rates of resonant and non-resonant ddµ formation in D2 and HD-gases and their temperature dependence from 40 to 350 K. Both output channels of the dd-reaction:3He + n and t + p will be observed and their ratio sensitive to contributions of S and P-waves will be determined. Simultaneously, we shall investigate the pdµ-cycle and determine the absolute pd-fusion yields in different molecular H/D compositions, observing tritons from nuclear muon capture in3Heµ: pdµ rarr3Heµ + gamma. We have developed a special system for the preparation of HD-gas with high concentration (96%) of HD and a purity (10–6).

Published
1996
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31. Measurement of the breakup channels in nuclear muon capture by3He and4He

Author

Maev, E., Ackerbauer, P., Balin, D., Baturin, V., Beer, G., Breunlich, W., Case, T., Crowe, K., Daniel, H., Deutsch, J., von Egidy, T., Govaerts, J., Grigoriev, Yu., Hartmann, F., Kammel, P., Lauss, B., Marton, J., Mühlbauer, M., Petitjean, C., Petitjean, Th., Petrov, G., Prieels, R., Prymas, W., Schott, W., Semenchuk, G., Smirenin, Yu., Vorobyov, A., Voropaev, N., and Wojciechowski, P.

Abstract

Abstract: The rates of the breakup reactions lambdaB(3He) and lambdaB(4He) in nuclear muon capture by3He and4He have been measured. The measurements were performed on the muon beam of PSI with a multi-anode high-pressure ionization chamber filled with isotopically pure3He or4He at 120 bar. The chamber was used as a target and detector for both the incoming muons and for the charged reaction products (tritons, deuterons and protons) of the breakup reactions LambdaB(3He) and LambdaB(4He). Our statistics, about 5 × 105 of breakup events, provides a possibility to improve the precision of evaluated rates. The preliminary results: lambdaB(3He)=720 ± 70 s–1, lambdaB(4He)=415 ± 40 s–1 are compared to theoretical predictions and to previous experiments.

Published
1996
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32. Systematic analysis of the PSI experiment to directly measure the sticking probabilityωs in dt fusion

Author

Case, T., Crowe, K. M., Lou, K., Petitjean, C., Breunlich, W. H., Jeitler, M., Kammel, P., Lauss, B., Marton, J., Prymas, W., Zmeskal, J., Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Ilyin, A. I., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Voropaev, N. I., Baumann, P., Daniel, H., Hartmann, F. J., Mühlbauer, M., Schott, W., and Wojciechowski, P.

Abstract

Starting in 1989 an experiment was run at PSI to directly measure the final sticking probability in muon catalyzed dt fusion. This experiment was based on an “active-target” ionization chamber (IC) built at Gatchina, Russia, and an array of plastic neutron counters. In three runs approximately 5×106 isolated alpha signals were recorded with around one half of these occurring in the inner chamber region where we have more complete understanding of the systematic errors. Particularly from a long run in 1992 we were able to obtain a very clean sticking peak of some 5000 μα events. However, to reach an accurate value of sticking, all systematic effects and several major backgrounds had to be understood in detail. To this end a Monte Carlo code was written to simulate the full electrostatic environment of the IC and to recreate completely each signal type including the actual tritium decay noise from the live experiment. A slightly model dependent value of approx. 0.56±0.04% is obtained for final sticking.

Published
1993
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33. Final dt stickingωs using the “survived moun method”

Author

Lou, K., Balin, D. V., Baturin, V. N., Baumann, P., Breunlich, W. H., Case, T., Crowe, K. M., Daniel, H., Grigoriev, Yu. S., Hartmann, F. J., Ilyin, A. I., Jeitler, M., Kammel, P., Lauss, B., Marton, J., Mühlbauer, M., Petitjean, C., Petrov, G. E., Prymas, W., Schott, W., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Wojciechowski, P., and Zmeskal, J.

Abstract

A new direct measurement of the final dt sticking probability ωs using a special data analysis called the “survived muon method” is presented. The data were obtained at PSI using a high pressure ionization chamber with H/D/T gas mixtures. The method can provide information on final sticking dμt → μα+n independent of theoretical models of stripping and initial sticking. It was found:ωs=(0.57±0.07±0.02)%. The experiment and the analysis method are discussed in detail.

Published
1993
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34. Feasibility of an experiment to determine the branching ratio for the emission of a heavy neutrino after muon capture in3He

Author

Schott, W., Baturin, V. N., Breunlich, W. H., Case, T., Daniel, H., Hartmann, F. J., Jeitler, M., Kammel, P., Lou, K., Maev, E. M., Marton, J., Mühlbauer, M., Petitjean, C., Petrov, G. E., Petrov, Yu. V., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., Wojciechowski, P., and Zmeskal, J.

Abstract

The triton energy of the muon capture reaction µ3He ? t+vµ, where µ3 He is the ground state of muonic3He, has been measured in order to investigate a possible heavy v admixture into the µ flavour with high sensitivity. µ3 He has been formed via the pµd fusion reaction by stopping µ- in an ionization chamber (IC) filled with an H/D gas mixture of 3% D concentration at a pressure of 161 bar. In a first short experiment 650 triton events were observed yielding an upper limit for the µ-heavy v mixing strength of 2.3×10-3 atE0v=60 MeV.

Published
1993
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