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46 results on '"Prymas, W."'

1. Muon transfer from deuterium to helium

Author

Augsburger, M., Ackerbauer, P., Breunlich, W. H., Cargnelli, M., Chatellard, D., Egger, J. -P., Gartner, B., Hartmann, F. J., Huot, O., Jacot-Guillarmod, R., Kammel, P., King, R., Knowles, P., Kosak, A., Lauss, B., Marton, J., Muehlbauer, M., Mulhauser, F., Petitjean, C., Prymas, W., Schaller, L. A., Schellenberg, L., Schneuwly, H., Tresch, S., von Egidy, T., and Zmeskal, J.

Subjects
Nuclear Experiment
Abstract

We report on an experiment at the Paul Scherrer Institute, Villigen, Switzerland measuring x rays from muon transfer from deuterium to helium. Both the ground state transfer via the exotic dmu3,4He* molecules and the excited state transfer from mud* were measured. The use of CCD detectors allowed x rays from 1.5 keV to 11 keV to be detected with sufficient energy resolution to separate the transitions to different final states in both deuterium and helium. The x-ray peaks of the dmu3He* and dmu4He* molecules were measured with good statistics. For the D2+3He mixture, the peak has its maximum at E_dmu3He = 6768 +- 12 eV with FWHM Gamma_dmu3He = 863 +- 10 eV. Furthermore the radiative branching ratio was found to be kappa_dmu3He = 0.301 +- 0.061. For the D_2+4He mixture, the maximum of the peak lies at E_dmu4He = 6831 +- 8 eV and the FWHM is Gamma_dmu4He = 856 +- 10 eV. The radiative branching ratio is kappa_dmu4He = 0.636 +- 0.097. The excited state transfer is limited by the probability to reach the deuterium ground state, q_1s. This coefficient was determined for both mixtures: q^3He_1s = 68.9 +- 2.7% and q^4He_1s = 90.1 +- 1.5., Comment: 9 pages, 11 figures

Published
2003
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2. Excited State Muon Transfer in Hydrogen/Deuterium Mixtures

Author

Lauss, B., Ackerbauer, P., Breunlich, W. H., Gartner, B., Jeitler, M., Kammel, P., Marton, J., Prymas, W., Zmeskal, J., Chatellard, D., Egger, J. -P., Jeannet, E., Daniel, H., Hartmann, F. J., Kosak, A., and Petitjean, C.

Subjects
Physics - Atomic Physics
Abstract

We report the first direct observation of excited state muon transfer in hydrogen/deuterium mixtures by direct measurement of q_1s, the probability that a mu-p atom, which is initially formed in an excited state, reaches the 1s ground state. The dependence of q_1s on deuterium concentration c_d was measured for two different densities at cryogenic temperatures using charge coupled devices (CCDs) to detect the muonic X rays. First results based on the analysis of the K_alpha-lines of the two isotopes are presented., Comment: 4 figures

Published
1997

3. X-ray emission during the muonic cascade in hydrogen

Author

Lauss, B., Ackerbauer, P., Breunlich, W. H., Gartner, B., Jeitler, M., Kammel, P., Marton, J., Prymas, W., Zmeskal, J., Chatellard, D., Egger, J. -P., Jeannet, E., Daniel, H., Hartmann, F. J., Kosak, A., and Petitjean, C.

Subjects
Physics - Atomic Physics
Abstract

We report our investigations of X rays emitted during the muonic cascade in hydrogen employing charge coupled devices as X-ray detectors. The density dependence of the relative X-ray yields for the muonic hydrogen lines (K_alpha, K_beta, K_gamma) has been measured at densities between 0.00115 and 0.97 of liquid hydrogen density. In this density region collisional processes dominate the cascade down to low energy levels. A comparison with recent calculations is given in order to demonstrate the influence of Coulomb deexcitation., Comment: 5 pages, Tex, 4 figures, submitted to Physical Review Letters

Published
1997
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4. A Precision Measurement of Nuclear Muon Capture on 3He

Author

Ackerbauer, P., Balin, D. V., Baturin, V. M., Beer, G. A., Breunlich, W. H., Case, T., Crowe, K., Daniel, H., Deutsch, J., Govaerts, J., Grigoriev, Yu. S., Hartmann, F. J., Kammel, P., King, R., Lauss, B., Maev, E. M., Markushin, V. E., Marton, J., Muehlbauer, 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.

Subjects
High Energy Physics - Phenomenology, Nuclear Experiment
Abstract

The muon capture rate in the reaction mu- 3He -> nu + 3H has been measured at PSI using a modular high pressure ionization chamber. The rate corresponding to statistical hyperfine population of the mu-3He atom is (1496.0 +- 4.0) s^-1. This result confirms the PCAC prediction for the pseudoscalar form factors of the 3He-3H system and the nucleon., Comment: 13 pages, 6 PostScript figures

Published
1997
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5. Precision Measurement of Nuclear Muon Capture by 3He

Author

Balin, D. V., Baturin, V. N., Grigoriev, Yu. S., Maev, E. M., Petrov, G. E., Semenchuk, G. G., Smirenin, Yu. V., Vorobyov, A. A., 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., Beer, G. A., Mitter, H., editor, Plessas, W., editor, and Guardiola, Rafael, editor

Published
1996
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6. Direct Measurement of Sticking in Muon Catalyzed DT Fusion and Physics of 'Hot' µt Atoms

Author

Lou, K., Petitjean, C., Case, T., Crowe, K. M., 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., Wojciechowski, P., Osterwalder, K., editor, Schaller, Lukas A., editor, and Petitjean, Claude, editor

Published
1993
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7. Muon transfer from protium to helium isotopes at low temperature

Author

Tresch, S., Ackerbauer, P., Augsburger, M., Breunlich, W.H., Cargnelli, M., Chatellard, D., Egger, J.-P., von Egidy, T., Gartner, B., Hartmann, F.J., Jacot-Guillarmod, R., Jeannet, E., King, R., Lauss, B., Marton, J., Mühlbauer, M., Mulhauser, F., Petitjean, C., Piller, C., Prymas, W., Schaller, L.A., Schellenberg, L., Schneuwly, H., Schott, W., Thalmann, Y.-A., Werthmüller, A., and Zmeskal, J.

Published
1999
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8. 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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9. Muon transfer from ground state deuterium to helium nuclei and its temperature dependence

Author

Gartner, B., Ackerbauer, P., Augsburger, M., Breunlich, W.H., Cargnelli, M., Chatellard, D., Egger, J.-P., von Egidy, T., Hartmann, F.J., Jacot-Guillarmod, R., Jeannet, E., Kammel, P., King, R.C., Kosak, A., Lauss, B., Marton, J., Mühlbauer, M., Mulhauser, F., Petitjean, C., Piller, C., Prymas, W., Schaller, L.A., Schellenberg, L., Schneuwly, H., Schott, W., Thalmann, Y.A., Tresch, S., Werthmüller, A., and Zmeskal, J.

Published
1999
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10. 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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12. 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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13. 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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14. Experimental investigation of the muon transfer reaction from deuterium to helium isotopes

Author

Gartner, B., Ackerbauer, P., Breunlich, W. H., Cargnelli, M., Fischer, A., Kammel, P., King, R., Kminek, G., Lauss, B., Marton, J., Prymas, W., Steininger, E., Zmeskal, J., Petitjean, C., Chatellard, D., Egger, J. -P., Jeannet, E., Hartmann, F. J., Kosak, A., Mühlbauer, M., von Egidy, T., Piller, C., Schaller, L. A., Schellenberg, L., Schneuwly, H., Thalmann, Y. -A., Tresch, S., and Werthmüller, A.

Published
1996
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15. 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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16. 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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17. 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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18. Muon transfer from protium to helium

Author

Tresch, S., Ackerbauer, P., Breunlich, W. H., Cargnelli, M., Chatellard, D., Egger, J. -P., von Egidy, T., Fischer, A., Gartner, B., Hartmann, F. J., Jacot-Guillarmod, R., Jeannet, E., Kammel, P., King, R., Kminek, G., Lauss, B., Marton, J., Mühlbauer, M., Mulhauser, F., Petitjean, C., Piller, C., Prymas, W., Schaller, L. A., Schellenberg, L., Schneuwly, H., Steininger, E., Thalmann, Y. A., Werthmüller, A., and Zmeskal, J.

Published
1996
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20. 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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21. 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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22. 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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23. 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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24. 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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25. 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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26. Precision Measurement of Nuclear Muon Capture by 3He

Author

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

Published
1995
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27. Final results on the μ3He-capture experiment and perspectives for μp-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

28. Insights on dμt sticking from dμd stripping and μ3He 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

29. New precision measurements of d$\mu$d fusion in D$_{2}$ gas

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

Subjects
Nuclear Physics
Published
1995

30. Muon transfer from deuterium to helium

Author

Augsburger, M., primary, Ackerbauer, P., additional, Breunlich, W. H., additional, Cargnelli, M., additional, Chatellard, D., additional, Egger, J.-P., additional, Gartner, B., additional, Hartmann, F. J., additional, Huot, O., additional, Jacot-Guillarmod, R., additional, Kammel, P., additional, King, R., additional, Knowles, P., additional, Kosak, A., additional, Lauss, B., additional, Marton, J., additional, Mühlbauer, M., additional, Mulhauser, F., additional, Petitjean, C., additional, Prymas, W., additional, Schaller, L. A., additional, Schellenberg, L., additional, Schneuwly, H., additional, Tresch, S., additional, von Egidy, T., additional, and Zmeskal, J., additional

Published
2003
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31. Ground-state muon transfer from deuterium to3Heand4He

Author

Gartner, B., primary, Ackerbauer, P., additional, Breunlich, W. H., additional, Cargnelli, M., additional, Kammel, P., additional, King, R., additional, Lauss, B., additional, Marton, J., additional, Prymas, W., additional, Zmeskal, J., additional, Petitjean, C., additional, Augsburger, M., additional, Chatellard, D., additional, Egger, J.-P., additional, von Egidy, T., additional, Hartmann, F. J., additional, Kosak, A., additional, Mühlbauer, M., additional, Mulhauser, F., additional, Schaller, L. A., additional, Schellenberg, L., additional, Schneuwly, H., additional, Thalmann, Y.-A., additional, Tresch, S., additional, and Werthmüller, A., additional

Published
2000
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32. Cascade in muonic deuterium atoms

Author

Lauss, B., primary, Ackerbauer, P., additional, Breunlich, W. H., additional, Gartner, B., additional, Jeitler, M., additional, Kammel, P., additional, Marton, J., additional, Prymas, W., additional, Zmeskal, J., additional, Chatellard, D., additional, Egger, J.-P., additional, Daniel, H., additional, Hartmann, F. J., additional, Kosak, A., additional, and Petitjean, C., additional

Published
1999
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33. Measurement of the formation rate and the radiative decay of the muonic molecules(pμ3He)*and(pμ4He)*

Author

Tresch, S., primary, Mulhauser, F., additional, Piller, C., additional, Schaller, L. A., additional, Schellenberg, L., additional, Schneuwly, H., additional, Thalmann, Y.-A., additional, Werthmüller, A., additional, Ackerbauer, P., additional, Breunlich, W. H., additional, Cargnelli, M., additional, Gartner, B., additional, King, R., additional, Lauss, B., additional, Marton, J., additional, Prymas, W., additional, Zmeskal, J., additional, Petitjean, C., additional, Augsburger, M., additional, Chatellard, D., additional, Egger, J.-P., additional, Jeannet, E., additional, von Egidy, T., additional, Hartmann, F. J., additional, Mühlbauer, M., additional, and Schott, W., additional

Published
1998
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34. X-Ray Emission during the Muonic Cascade in Hydrogen

Author

Lauss, B., primary, Ackerbauer, P., additional, Breunlich, W. H., additional, Gartner, B., additional, Jeitler, M., additional, Kammel, P., additional, Marton, J., additional, Prymas, W., additional, Zmeskal, J., additional, Chatellard, D., additional, Egger, J.-P., additional, Jeannet, E., additional, Daniel, H., additional, Hartmann, F. J., additional, Kosak, A., additional, and Petitjean, C., additional

Published
1998
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35. Muon transfer rates from hydrogen to3Heand4Hemeasured at low temperature

Author

Tresch, S., primary, Jacot-Guillarmod, R., additional, Mulhauser, F., additional, Piller, C., additional, Schaller, L. A., additional, Schellenberg, L., additional, Schneuwly, H., additional, Thalmann, Y.-A., additional, Werthmüller, A., additional, Ackerbauer, P., additional, Breunlich, W. H., additional, Cargnelli, M., additional, Gartner, B., additional, King, R., additional, Lauss, B., additional, Marton, J., additional, Prymas, W., additional, Zmeskal, J., additional, Petitjean, C., additional, Chatellard, D., additional, Egger, J.-P., additional, Jeannet, E., additional, Hartmann, F. J., additional, and Mühlbauer, M., additional

Published
1998
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36. A precision measurement of nuclear muon capture on 3He

Author

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

Published
1998
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37. Excited State Muon Transfer in Hydrogen/Deuterium Mixtures

Author

Lauss, B., primary, Ackerbauer, P., additional, Breunlich, W. H., additional, Gartner, B., additional, Jeitler, M., additional, Kammel, P., additional, Marton, J., additional, Prymas, W., additional, Zmeskal, J., additional, Chatellard, D., additional, Egger, J.-P., additional, Jeannet, E., additional, Daniel, H., additional, Kosak, A., additional, Hartmann, F. J., additional, and Petitjean, C., additional

Published
1996
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38. 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., and Vasiliev, A.A.

Abstract

Data from the recent PSI high statistics experiment on d μ d fusion 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 t sticking 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. [ABSTRACT FROM AUTHOR]

Published
1999
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39. 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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40. 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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41. 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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42. 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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43. 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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44. 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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45. 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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46. Final results on the μ3He-capture experiment and perspectives for μp-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., Egidy, T., Faifman, M. P., Fetisov, A. A., Ganzha, V. A., Govaerts, J., Gusev, V. V., Hartmann, F. J., Herold, W. D., Peter Kammel, 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.

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