Gardner, Amy, Softley, Timothy and Keller, Matthias (2019) Multi-photon ionisation spectroscopy for rotational state preparation of N+2. Scientific Reports, 9 (506). pp. 1-8. ISSN 2045-2322
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Abstract
In this paper we investigate the 2 + 1′ resonance enhanced multi-photon ionisation (REMPI) of molecular nitrogen via the a1Πg(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.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Research Centres and Groups: | Atomic, Molecular and Optical Physics Research Group |
Subjects: | Q Science > QC Physics |
Depositing User: | Alice Jackson |
Date Deposited: | 18 Dec 2018 11:32 |
Last Modified: | 08 Apr 2019 13:01 |
URI: | http://srodev.sussex.ac.uk/id/eprint/80809 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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Low temperature Ion - Radical Collisions | G1744 | EPSRC-ENGINEERING & PHYSICAL SCIENCES RESEARCH COUNCIL | EP/N004930/1 |