Shape Resonances in as Photolysis Reaction Intermediates

K. F. Lai; E. J. Salumbides; W. Ubachs; M. Beyer

doi:10.1103/PhysRevLett.127.183001

Shape Resonances in as Photolysis Reaction Intermediates

K. F. Lai, E. J. Salumbides, W. Ubachs, M. Beyer

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Abstract

Shape resonances in , produced as reaction intermediates in the photolysis of precursor molecules, are measured in a half-collision approach. Before disintegrating into two ground state H atoms, the reaction is quenched by two-photon Doppler-free excitation to the electronically excited state of . For , 15, 17, 19, and 21, resonances with lifetimes in the range of nano- to milliseconds were observed with an accuracy of 30 MHz (1.4 mK). The experimental resonance positions are found to be in excellent agreement with theoretical predictions when nonadiabatic and quantum electrodynamical corrections are included. This is the first time such effects are observed in collisions between neutral atoms. From the potential energy curve of the molecule, now tested at high accuracy over a wide range of internuclear separations, the -wave scattering length for singlet scattering is determined at .

Original language	English
Article number	183001
Pages (from-to)	1-6
Number of pages	6
Journal	Physical review letters
Volume	127
Issue number	18
Early online date	26 Oct 2021
DOIs	https://doi.org/10.1103/PhysRevLett.127.183001
Publication status	Published - 29 Oct 2021

Bibliographical note

Funding Information:
H2020 European Research Council Nederlandse Organisatie voor Wetenschappelijk Onderzoek

Funding Information:
The authors thank Professor Frederic Merkt (ETH Zürich) for discussions motivating this work. This work is financially supported by the European Research Council through an ERC Advanced grant (No. 670168). M. B. acknowledges NWO for a VENI grant (VI.Veni.202.140).

Publisher Copyright:
© 2021 American Physical Society

Funding

H2020 European Research Council Nederlandse Organisatie voor Wetenschappelijk Onderzoek The authors thank Professor Frederic Merkt (ETH Zürich) for discussions motivating this work. This work is financially supported by the European Research Council through an ERC Advanced grant (No. 670168). M. B. acknowledges NWO for a VENI grant (VI.Veni.202.140).

Funders	Funder number
H2020 European Research Council Nederlandse Organisatie voor Wetenschappelijk Onderzoek
Horizon 2020 Framework Programme	670168
European Research Council
Nederlandse Organisatie voor Wetenschappelijk Onderzoek	VI.Veni.202.140

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10.1103/PhysRevLett.127.183001

Shape Resonances in as Photolysis Reaction IntermediatesFinal published version, 678 KBLicence: Article 25fa Dutch Copyright Act

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title = "Shape Resonances in as Photolysis Reaction Intermediates",

abstract = "Shape resonances in , produced as reaction intermediates in the photolysis of precursor molecules, are measured in a half-collision approach. Before disintegrating into two ground state H atoms, the reaction is quenched by two-photon Doppler-free excitation to the electronically excited state of . For , 15, 17, 19, and 21, resonances with lifetimes in the range of nano- to milliseconds were observed with an accuracy of 30 MHz (1.4 mK). The experimental resonance positions are found to be in excellent agreement with theoretical predictions when nonadiabatic and quantum electrodynamical corrections are included. This is the first time such effects are observed in collisions between neutral atoms. From the potential energy curve of the molecule, now tested at high accuracy over a wide range of internuclear separations, the -wave scattering length for singlet scattering is determined at .",

author = "Lai, {K. F.} and Salumbides, {E. J.} and W. Ubachs and M. Beyer",

note = "Funding Information: H2020 European Research Council Nederlandse Organisatie voor Wetenschappelijk Onderzoek Funding Information: The authors thank Professor Frederic Merkt (ETH Z{\"u}rich) for discussions motivating this work. This work is financially supported by the European Research Council through an ERC Advanced grant (No. 670168). M. B. acknowledges NWO for a VENI grant (VI.Veni.202.140). Publisher Copyright: {\textcopyright} 2021 American Physical Society",

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AU - Ubachs, W.

AU - Beyer, M.

N1 - Funding Information: H2020 European Research Council Nederlandse Organisatie voor Wetenschappelijk Onderzoek Funding Information: The authors thank Professor Frederic Merkt (ETH Zürich) for discussions motivating this work. This work is financially supported by the European Research Council through an ERC Advanced grant (No. 670168). M. B. acknowledges NWO for a VENI grant (VI.Veni.202.140). Publisher Copyright: © 2021 American Physical Society

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N2 - Shape resonances in , produced as reaction intermediates in the photolysis of precursor molecules, are measured in a half-collision approach. Before disintegrating into two ground state H atoms, the reaction is quenched by two-photon Doppler-free excitation to the electronically excited state of . For , 15, 17, 19, and 21, resonances with lifetimes in the range of nano- to milliseconds were observed with an accuracy of 30 MHz (1.4 mK). The experimental resonance positions are found to be in excellent agreement with theoretical predictions when nonadiabatic and quantum electrodynamical corrections are included. This is the first time such effects are observed in collisions between neutral atoms. From the potential energy curve of the molecule, now tested at high accuracy over a wide range of internuclear separations, the -wave scattering length for singlet scattering is determined at .

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Shape Resonances in as Photolysis Reaction Intermediates

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