s41598-018-36783-5.pdf (2.42 MB)
Multi-photon ionisation spectroscopy for rotational state preparation of N+2
Version 2 2023-06-12, 08:55
Version 1 2023-06-09, 16:16
journal contribution
posted on 2023-06-12, 08:55 authored by Amy Gardner, Timothy Softley, Matthias KellerMatthias KellerIn this paper we investigate the 2?+?1' resonance enhanced multi-photon ionisation (REMPI) of molecular nitrogen via the a1?g(v?=?6) intermediate state and analyse its feasibility to generate molecular nitrogen ions in a well defined ro-vibrational state. This is an important tool for high precision experiments based on trapped molecular ions, and is crucial for studying the time variation of the fundamental constant mp/me using N+2. The transition is not reported in the literature and detailed spectral analysis has been conducted to extract the molecular constants of the intermediate state. By carefully choosing the intermediate ro-vibrational state, the ionisation laser wavelength and controlling the excitation laser pulse energy, unwanted formation of rotationally excited molecular ions can be suppressed and ro-vibrational ground state ions can be generated with high purity.
Funding
Low temperature Ion - Radical Collisions; G1744; EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL; EP/N004930/1
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Publication status
- Published
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- Published version
Journal
Scientific ReportsISSN
2045-2322Publisher
Nature ResearchExternal DOI
Issue
506Volume
9Page range
1-8Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Atomic, Molecular and Optical Physics Research Group Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2018-12-18First Open Access (FOA) Date
2019-01-25First Compliant Deposit (FCD) Date
2018-12-14Usage metrics
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