Millimeter-millimeter-wave double-modulation double-resonance spectroscopy
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909402186907648 |
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| author | Zingsheim, Oliver Bonah, Luis Lewen, Frank Thorwirth, Sven Müller, Holger S. P. Schlemmer, Stephan |
| author_facet | Zingsheim, Oliver Bonah, Luis Lewen, Frank Thorwirth, Sven Müller, Holger S. P. Schlemmer, Stephan |
| contents | A new millimeter- to millimeter-wave double-modulation double-resonance (MMW-MMW DM-DR) scheme has been applied to record spectra of two astronomically relevant complex organic molecules (COMs), propanal (C2H5CHO) and ethyl cyanide (C2H5CN), to demonstrate advantages of the DM-DR experimental technique. The DR technique helps to identify target transitions in a forest of lines and the implementation of a DM procedure (modulation of the pump and probe source) allows for confusion- and baseline-free spectra containing only the line(s) of interest. In particular the unambiguous assignment of weak and blended transitions in very dense MMW spectra is highlighted. Details of the observed Autler-Townes line splitting and possible future applications, such as automated analyses and adaptions of DM-DR methods to other experimental setups, are discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_01297 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Millimeter-millimeter-wave double-modulation double-resonance spectroscopy Zingsheim, Oliver Bonah, Luis Lewen, Frank Thorwirth, Sven Müller, Holger S. P. Schlemmer, Stephan Chemical Physics Instrumentation and Methods for Astrophysics A new millimeter- to millimeter-wave double-modulation double-resonance (MMW-MMW DM-DR) scheme has been applied to record spectra of two astronomically relevant complex organic molecules (COMs), propanal (C2H5CHO) and ethyl cyanide (C2H5CN), to demonstrate advantages of the DM-DR experimental technique. The DR technique helps to identify target transitions in a forest of lines and the implementation of a DM procedure (modulation of the pump and probe source) allows for confusion- and baseline-free spectra containing only the line(s) of interest. In particular the unambiguous assignment of weak and blended transitions in very dense MMW spectra is highlighted. Details of the observed Autler-Townes line splitting and possible future applications, such as automated analyses and adaptions of DM-DR methods to other experimental setups, are discussed. |
| title | Millimeter-millimeter-wave double-modulation double-resonance spectroscopy |
| topic | Chemical Physics Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2407.01297 |