1. FAMU: study of the energy dependent transfer rate Λ μp → μO
- Author
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Roberto Benocci, F. Somma, M. Zuffa, C. D. Vecchi, Massimiliano Clemenza, Miltcho B. Danailov, Dimitar Bakalov, F. Fuschino, M. Stoilov, K. Ishida, Ezio Previtali, L. Stoychev, L. P. Rignanese, Roberta Ramponi, Alessandro Menegolli, C. Pizzolotto, Andrzej Adamczak, K. S. Gadedjisso-Tossou, R. Nardò, D. Guffaanti, A. Rachevski, A. Tomaselli, F. Chignoli, M. I. Moretti, Paolo Rossi, A. Iaciofano, M. Rossella, S. Meneghini, M. Furini, R. Mazza, T. Cervi, G. Zampa, Valter Maggi, I. D'Antone, A. D. Bari, Giovanni Baccolo, E. Mocchiutti, Maurizio Bonesini, Claudio Labanti, M. D. Vincenzi, Giuseppe Baldazzi, V. Bonvicini, E. Furlanetto, A. Curioni, E. Vallazza, Riccardo Campana, Joseph Niemela, Gianluca Morgante, L. Tortora, A. Vacchi, L. Colace, P. Danev, Anselmo Margotti, Massimiliano Nastasi, R. Bertoni, Mocchiutti, E., Bonvicini, V., Danailov, M., Furlanetto, E., Gadedjisso-Tossou, K. S., Guffaanti, D., Pizzolotto, C., Rachevski, A., Stoychev, L., Vallazza, E., Zampa, G., Niemela, J., Ishida, K., Adamczak, A., Baccolo, G., Benocci, R., Bertoni, R., Bonesini, M., Chignoli, F., Clemenza, M., Curioni, A., Maggi, V., Mazza, R., Moretti, M., Nastasi, M., Previtali, E., Bakalov, D., Danev, P., Stoilov, M., Baldazzi, G., Campana, R., D'Antone, I., Furini, M., Fuschino, F., Labanti, C., Margotti, A., Meneghini, S., Morgante, G., Rignanese, L. P., Rossi, P. L., Zuffa, M., Cervi, T., Bari, A. D., Menegolli, A., Vecchi, C. D., DI NARDO, Roberto, Rossella, M., Tomaselli, A., Colace, L., Vincenzi, M. D., Iaciofano, A., Somma, F., Tortora, L., Ramponi, R., Vacchi, A., Mocchiutti, E, Bonvicini, V, Danailov, M, Furlanetto, E, Gadedjisso-Tossou, K, Guffaanti, D, Pizzolotto, C, Rachevski, A, Stoychev, L, Vallazza, E, Zampa, G, Niemela, J, Ishida, K, Adamczak, A, Baccolo, G, Benocci, R, Bertoni, R, Bonesini, M, Chignoli, F, Clemenza, M, Curioni, A, Maggi, V, Mazza, R, Moretti, M, Nastasi, M, Previtali, E, Bakalov, D, Danev, P, Stoilov, M, Baldazzi, G, Campana, R, D’Antone, I, Furini, M, Fuschino, F, Labanti, C, Margotti, A, Meneghini, S, Morgante, G, Rignanese, L, Rossi, P, Zuffa, M, Cervi, T, Bari, A, Menegolli, A, Vecchi, C, Nardò, R, Rossella, M, Tomaselli, A, Colace, L, Vincenzi, M, Iaciofano, A, Somma, F, Tortora, L, Ramponi, R, Vacchi, A, Gadedjisso-Tossou, K.S., Rignanese, L.P., Rossi, P.L., Bari, A De, Vecchi, C De, Nardò, R., and Vincenzi, M De
- Subjects
Energy dependent ,Physics ,History ,muonic atom ,Kinetics, Energy dependence ,Time distribution, X rays ,Muon transfer ,Muonic Hydrogen, Muon transfer ,Computer Science Applications ,Education ,Hyperfine splitting ,Laser wavelength ,Spectroscopic measurement ,Transfer (computing) ,Atomic physic ,Atomic physics ,Physical proce ,Kinetic energy ,muonic hydrogen ,Exotic atom - Abstract
The main goal of the FAMU experiment is the measurement of the hyperfine splitting (hfs) in the 1S state of muonic hydrogen ΔE hfs (μ - p)1S. The physical process behind this experiment is the following: μp are formed in a mixture of hydrogen and a higher-Z gas. When absorbing a photon at resonance-energy ΔE hfs ≈ 0.182 eV, in subsequent collisions with the surrounding H 2 molecules, the μp is quickly de-excited and accelerated by ∼ 2/3 of the excitation energy. The observable is the time distribution of the K-lines X-rays emitted from the μZ formed by muon transfer (μp) + Z → (μZ)∗ + p, a reaction whose rate depends on the μp kinetic energy. The maximal response, to the tuned laser wavelength, of the time distribution of X-ray from K-lines of the (μZ)∗ cascade indicate the resonance. During the preparatory phase of the FAMU experiment, several measurements have been performed both to validate the methodology and to prepare the best configuration of target and detectors for the spectroscopic measurement. We present here the crucial study of the energy dependence of the transfer rate from muonic hydrogen to oxygen (Λ μp → μ0 ), precisely measured for the first time.
- Published
- 2018
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