Deller, A;
Alonso, AM;
Cooper, BS;
Hogan, SD;
Cassidy, DB;
(2016)
Electrostatically Guided Rydberg Positronium.
Physical Review Letters
, 117
(7)
, Article 073202. 10.1103/PhysRevLett.117.073202.
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Abstract
We report experiments in which positronium (Ps) atoms were guided using inhomogeneous electric fields. Ps atoms in Rydberg-Stark states with principal quantum number n=10 and electric dipole moments up to 610 D were prepared via two-color two-photon optical excitation in the presence of a 670 V cm−1 electric field. The Ps atoms were created at the entrance of a 0.4 m long electrostatic quadrupole guide, and were detected at the end of the guide via annihilation gamma radiation. When the lasers were tuned to excite low-field-seeking Stark states, a fivefold increase in the number of atoms reaching the end of the guide was observed, whereas no signal was detected when high-field-seeking states were produced. The data are consistent with the calculated geometrical guide acceptance.
| Type: | Article |
|---|---|
| Title: | Electrostatically Guided Rydberg Positronium |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.117.073202 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.117.073202 |
| Language: | English |
| Additional information: | © 2016 American Physical Society. V. Zhelyazkova and S. D. Hogan: Preparation of circular Rydberg states in helium using the crossed-fields method, in: PHYSICAL REVIEW A 94, 023415 (2016). The final publication is available at APS via http://dx.doi.org/10.1103/PhysRevLett.117.073202 |
| Keywords: | science & technology, physical sciences, physics, multidisciplinary, physics, inhomogeneous electric-fields, cold positronium, P-state, molecules, annihilation, atoms, manipulation, deceleration, deflection, desorption |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1508671 |
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