Le Duc, Viet; Zou, Junwen; Osterwalder, Andreas; (2024) Alignment of ND3 molecules in dc-electric fields. The Journal of Chemical Physics , 160 (20) , Article 204305. 10.1063/5.0210431.

Text 204305_1_5.0210431.pdf - Published Version Access restricted to UCL open access staff until 29 May 2025. Download (4MB)

Abstract

The control of movement and orientation of gas-phase molecules has become the focus of many research areas in molecular physics. Here, ND3 molecules are polarized in a segmented, curved electrostatic guide and adiabatically aligned inside a rotatable mass spectrometer (MS). Alignment is probed by photoionization using a linearly polarized laser. Rotation of the polarization at fixed MS orientation has the same effect as the rotation of the MS at fixed polarization, proving that the molecular alignment adiabatically follows the MS axis. Polarization-dependent ion signals reveal state-specific populations and allow for a quantification of the aligned sample in the space-fixed reference frame.

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