Abstract
The fundamental vibrational interval of H2+ has been determined to be ΔG1/2=2191.126 614(17) cm-1 by continuous-wave laser spectroscopy of Stark manifolds of Rydberg states of H2 with the H2+ ion core in the ground and first vibrationally excited states. Extrapolation of the Stark shifts to zero field yields the zero-quantum-defect positions -RH2/n2, from which ionization energies can be determined. Our new result represents a 4-order-of-magnitude improvement compared to earlier measurements. It agrees, within the experimental uncertainty, with the value of 2191.126 626 344(17)(100) cm-1 determined in nonrelativistic quantum electrodynamic calculations [V. Korobov, L. Hilico and J.-Ph. Karr, Phys. Rev. Lett. 118, 233001 (2017)PRLTAO0031-900710.1103/PhysRevLett.118.233001].
| Original language | English |
|---|---|
| Article number | 073001 |
| Pages (from-to) | 1-7 |
| Number of pages | 7 |
| Journal | Physical review letters |
| Volume | 132 |
| Issue number | 7 |
| Early online date | 13 Feb 2024 |
| DOIs | |
| Publication status | Published - 16 Feb 2024 |
Bibliographical note
Publisher Copyright:© 2024 American Physical Society.
Funding
We thank J. A. Agner and H. Schmutz for their contributions to setting up and maintaining the experimental infrastructure and Professor Ch. Jungen for fruitful discussions. This work is supported financially by the Swiss National Science Foundation (Grant No. 200020B-200478).
| Funders | Funder number |
|---|---|
| Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung | 200020B-200478 |