| Article | |
| Report number | CERN-PH-EP-2015-265 |
| Title | Laser excitation of the n=3 level of positronium for antihydrogen production |
| Related title | Laser excitation of the n=3 level of positronium |
| Author(s) |
Aghion, S (INFN, Milan ; Milan Polytechnic) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Bonomi, G (INFN, Pavia ; U. Brescia) ; Braunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Cabaret, L (U. Paris-Saclay, Orsay) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Caravita, R (Genoa U. ; INFN, Genoa) ; Castelli, F (Milan U. ; INFN, Milan) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Chlouba, K (Heidelberg, Max Planck Inst.) ; Cialdi, S (Milan U. ; INFN, Milan) ; Comparat, D (U. Paris-Saclay, Orsay) ; Consolati, G (INFN, Milan ; Milan Polytechnic) ; Demetrio, A (Kirchhoff Inst. Phys.) ; Di Noto, L (Genoa U. ; INFN, Genoa) ; Doser, M (CERN) ; Dudarev, A (CERN) ; Ereditato, A (Bern U., LHEP) ; Evans, C (Milan Polytechnic ; INFN, Milan) ; Ferragut, R (INFN, Milan ; Milan Polytechnic) ; Fesel, J (CERN) ; Fontana, A (INFN, Pavia) ; Forslund, O K (CERN) ; Gerber, S (CERN) ; Giammarchi, M (INFN, Milan ; Bern U., LHEP) ; Gligorova, A (Bergen U.) ; Gninenko, S N (Moscow, INR) ; Guatieri, F (Trento U. ; TIFPA-INFN, Trento) ; Haider, S (CERN) ; Holmestad, H (Oslo U.) ; Huse, T (Oslo U.) ; Jernelv, I L (CERN) ; Jordan, E (Heidelberg, Max Planck Inst.) ; Kellerbauer, A (Heidelberg, Max Planck Inst.) ; Kimura, M (Bern U., LHEP) ; Koetting, T (CERN) ; Krasnicky, D (INFN, Genoa ; Genoa U.) ; Lagomarsino, V (Genoa U. ; INFN, Genoa) ; Lansonneur, P (Lyon, IPN) ; Lebrun, P (Lyon, IPN) ; Lehner, S (Stefan Meyer Inst. Subatomare Phys.) ; Liberadzka, J (CERN) ; Malbrunot, C (Stefan Meyer Inst. Subatomare Phys. ; CERN) ; Mariazzi, S (Stefan Meyer Inst. Subatomare Phys.) ; Marx, L (CERN) ; Matveev, V A (Dubna, JINR ; Moscow, INR) ; Mazzotta, Z (INFN, Milan ; Milan U.) ; Nebbia, G (INFN, Padua) ; Nedelec, P (Lyon, IPN ; Lyon U.) ; Oberthaler, M K (Kirchhoff Inst. Phys.) ; Pacifico, N (Bergen U.) ; Pagano, D (U. Brescia ; INFN, Pavia) ; Penasa, L (Trento U. ; TIFPA-INFN, Trento) ; Petracek, V (Prague, Tech. U.) ; Pistillo, C (Bern U., LHEP) ; Prelz, F (INFN, Milan) ; Prevedelli, M (Bologna U.) ; Ravelli, L (Trento U. ; TIFPA-INFN, Trento) ; Resch, L (CERN) ; Rienacker, B (CERN) ; Røhne, O M (Oslo U.) ; Rotondi, A (Pavia U. ; INFN, Pavia) ; Sacerdoti, M (INFN, Milan ; Milan U.) ; Sandaker, H (Oslo U.) ; Santoro, R (INFN, Milan ; Insubria U., Como) ; Scampoli, P (Naples U. ; Bern U., LHEP) ; Smestad, L (CERN ; Research Council Norway, Lysaker) ; Sorrentino, F (Genoa U. ; INFN, Genoa) ; Spacek, M (CTU, Prague) ; Storey, J (Bern U., LHEP) ; Strojek, I M (CTU, Prague) ; Testera, G (INFN, Genoa) ; Tietje, I (CERN) ; Vamosi, S (Stefan Meyer Inst. Subatomare Phys.) ; Widmann, E (Stefan Meyer Inst. Subatomare Phys.) ; Yzombard, P (U. Paris-Saclay, Orsay) ; Zmeskal, J (Stefan Meyer Inst. Subatomare Phys.) ; Zurlo, N. (INFN, Pavia ; U. Brescia) |
| Publication | 2016 |
| Imprint | 17 Sep 2015 |
| Number of pages | 7 |
| In: | Phys. Rev. A 94 (2016) 012507 |
| DOI | 10.1103/PhysRevA.94.012507 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN AD ; AEGIS AD-6 |
| Free keywords | spectroscopy ; experimental results ; positronium, spectroscopy |
| Abstract | We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the $3^{3}P$ state. |
| Copyright/License | publication: © 2016-2024 The Author(s) (License: CC-BY-3.0) preprint: © 2015-2024 CERN (License: CC-BY-4.0) |
Corresponding record in: Inspire
Email contact: michael.doser@cern.ch
Record created 2015-09-18, last modified 2022-08-10