Techniques for Production and Detection of 23S Positronium |
S. Mariazzia, b, R. Caravitac, A. Vespertinia, A. Camperc, B. Rienackerc, R.S. Brusaa, b, M. Antonellod, e, A. Belovf, G. Bonomig, h, M. Cacciad, e, F. Castellid, i, G. Cerchiarij, D. Comparatk, G. Consolatil, d, A. Demetriom, j, Di Noton, o, M. Doserc, M. Fanìc, n, o, J. Feselc, S. Gerberc, A. Gligorovap, F. Guatieria, b, P. Hackstockp, S. Haiderc, A. Hinterbergerc, A. Kellerbauerj, O. Khalidovac, D. Krasnickyo, V. Lagomarsinon, o, P. Lebrunq, C. Malbrunotc, p, V. Matveevf, r, S.R. Mullerm, G. Nebbias, P. Nedelecq, M. Oberthalerm, E. Oswaldc, D. Paganog, h, L. Penasaa, b, V. Petracekt, F. Prelzd, M. Prevedelliu, J. Robertk, O.M. Røhnev, A. Rotondih, w, H. Sandakerv, R. Santorod, e, G. Testerao, I.C. Tietjec, E. Widmannp, T. Wolzc, P. Yzombardj, C. Zimmerc, j, x, N. Zurloh, y
aDepartment of Physics, University of Trento, via Sommarive 14, 38123 Povo, Trento, Italy bTIFPA/INFN Trento, via Sommarive 14, 38123 Povo, Trento, Italy cPhysics Department, CERN, 1211 Geneva 23, Switzerland dINFN Milano, via Celoria 16, 20133 Milano, Italy eDepartment of Science, University of Insubria, Via Valleggio 11, 22100 Como, Italy fInstitute for Nuclear Research of the Russian Academy of Science, Moscow 117312, Russia gDepartment of Mechanical and Industrial Engineering, University of Brescia, via Branze 38, 25123 Brescia, Italy hINFN Pavia, via Bassi 6, 27100 Pavia, Italy iDepartment of Physics ``Aldo Pontremoli'', University of Milano, via Celoria 16, 20133 Milano, Italy jMax Planck Institute for Nuclear Physics, Saupfercheckweg 1, 69117 Heidelberg, Germany kLaboratoire Aime Cotton, Université Paris-Sud, ENS Paris Saclay, CNRS, Université Paris-Saclay, 91405 Orsay Cedex, France lDepartment of Aerospace Science and Technology, Politecnico di Milano, via La Masa 34, 20156 Milano, Italy mKirchhoff Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany nDepartment of Physics, University of Genova, via Dodecaneso 33, 16146 Genova, Italy oINFN Genova, via Dodecaneso 33, 16146 Genova, Italy pStefan Meyer Institute for Subatomic Physics, Austrian Academy of Sciences, Boltzmanngasse 3, 1090 Vienna, Austria qInstitute of Nuclear Physics, CNRS/IN2p3, University of Lyon 1, 69622 Villeurbanne, France rJoint Institute for Nuclear Research, Dubna 141980, Russia sINFN Padova, via Marzolo 8, 35131 Padova, Italy tCzech Technical University, Prague, Brehova 7, 11519 Prague 1, Czech Republic uUniversity of Bologna, Viale Berti Pichat 6/2, 40126 Bologna, Italy vDepartment of Physics, University of Oslo, Sem Sælandsvei 24, 0371 Oslo, Norway wDepartment of Physics, University of Pavia, via Bassi 6, 27100 Pavia, Italy xDepartment of Physics, Heidelberg University, Im Neuenheimer Feld 226, 69120 Heidelberg, Germany yDepartment of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, via Branze 43, 25123 Brescia, Italy |
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In this work, we show recent measurements of 23S long-lived positronium production via spontaneous decay from the 33P level. The possibility to tune the velocity of the 23S positronium, excited following this scheme, is presented. In the light of these results, we discuss the use of the 33P→23S transition to realize a monochromatic pulsed 23S positronium beam with low angular divergence. Preliminary tests of 23S beam production are presented. The possibility to overcome the natural 33P→23S branching ratio via stimulated emission, and thus increasing the intensity of the 23S source, is also shown. A position-sensitive detector for a pulsed beam of positronium, with spatial resolution of ~90 μm, is finally described in view of its possible application for the spatial characterization of the 23S beam. |
DOI:10.12693/APhysPolA.137.91 PACS numbers: 37.20.+j, 36.10.Dr, 78.70.Bj |