Scientific Results

Laser sources for efficient two-step Positronium excitation to Rydberg states

Year: 2011

Authors: Becucci M., Ferrari G., Boscolo I., Castelli F., Cialdi S., Villa F., Giammarchi M.G.

Autors Affiliation: LENS-Università di Firenze, via Carrara 1, 50019 Sesto Fiorentino, Italy; Dipartimento di Chimica Ugo Schiff Università di Firenze, via della Lastruccia 3, 50019 Sesto Fiorentino, Italy; INO-CNR BEC Center, via Sommarive 14, 38123 Povo, Italy; INFN-Sezione di Firenze, via Carrara 1, 50019 Sesto Fiorentino, Italy; Università degli Studi di Milano, via Celoria 16, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, sezione di Milano, via Celoria 16, 20133 Milano, Italy

Abstract: Antihydrogen production by charge exchange reaction between Positronium atoms and antiprotons benefits from an efficient excitation of Positronium atoms to high-n levels (Rydberg levels). A two-step optical excitation, the first from ground to n = 3 and the second from this level to a Rydberg level, is proposed and a proper laser system to be developed is discussed. The requirements on the energy and bandwidth of the excitation laser suggest the use of optical parametric generation technology for both wavelengths. The laser system is composed of two subsystems: one for the generation of 205 nm radiation and the other for the generation of 1670 nm radiation. We report on the progress towards the realization of the short wavelength source. (C) 2011 Elsevier B.V. All rights reserved.

Journal/Review: JOURNAL OF MOLECULAR STRUCTURE

Volume: 993 (1-3)      Pages from: 495  to: 499

KeyWords: Positronium; Rydberg states; Zeeman and Stark effects; Antihydrogen;
DOI: 10.1016/j.molstruc.2011.01.064

Citations: 3
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