Slow and velocity-tunable beams of metastable He${}_2$ by multistage Zeeman deceleration

Abstract

Metastable helium molecules (He${}_2^{\ast }$) have been generated by striking a discharge in a supersonic expansion of helium gas from a pulsed valve. When operating the pulsed valve at room temperature, 77K, and 10K, the mean velocity of the supersonic beam was measured to be 1900m/s, 980m/s, and 530m/s, respectively. A 55-stage Zeeman decelerator operated in a phase-stable manner was then used to further reduce the beam velocity and tune it in the range between 100 and 150m/s. The internal-state distribution of the decelerated sample was established by photoionization spectroscopy.

10 pages, 7 figures

References in corpus (3)

• Sisyphus Cooling of Electrically Trapped Polyatomic Molecules
• Stopping supersonic oxygen with a series of pulsed electromagnetic coils: A molecular coilgun
• Precision spectroscopy of high rotational states in H_2 investigated by Doppler-free two-photon laser spectroscopy in the EF^1Σ_g^+ - X^1Σ_g^+ system

Cited by in corpus (14)

• Precision measurement of the ionization energy of Cs I
• Magnetic Trapping of Cold Methyl Radicals
• Cold collision and high-resolution spectroscopy of buffer gas cooled BaF Molecule
• Precision Measurements in Few-Electron Molecules: The Ionization Energy of Metastable ${}^4$He${}_2$ and the First Rotational Interval of ${}^4$He${{}_2}^{+}$
• A new concept multi-stage Zeeman decelerator
• Multistage Zeeman deceleration of NH $X{}^3{\Sigma }^{-}$ radicals
• Fluorescence-lifetime-limited trapping of Rydberg helium atoms on a chip
• High-resolution spectroscopy of He${}_2^{+}$ using Rydberg-series extrapolation and Zeeman-decelerated supersonic beams of metastable He${}_2$
• Precision measurement of the rotational energy-level structure of the three-electron molecule He${}_2^{+}$
• Zeeman deceleration of electron-impact-excited metastable helium atoms
• A New Design for a Traveling-Wave Zeeman Decelerator: II. Experiment
• Model for the overall phase-space acceptance in a Zeeman decelerator
• A New Design for a Traveling-Wave Zeeman Decelerator: I. Theory
• Characterization of the electronic ground state of He${}_2^{+}$ by high-resolution photoelectron spectroscopy