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Cold Ion Chemistry - Experiments within a Rydberg Orbit

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Publications

SI-traceable frequency dissemination at 1572.06 nm in a stabilized fiber network with ring topology

Author(s): Dominik Husmann; Laurent-Guy Bernier; Mathieu Bertrand; Davide Calonico; Konstantinos Chaloulos; Gloria Clausen; Cecilia Clivati; Jérôme Faist; Ernst Heiri; Urs Hollenstein; Anatoly Johnson; Fabian Mauchle; Ziv Meir; Frédéric Merkt; Alberto Mura; Giacomo Scalari; Simon Scheidegger; Hansjürg Schmutz; Mudit Sinhal; Stefan Willitsch; Jacques Morel
Published in: Optics Express, 29 (16), 2021, Page(s) 24592-24605, ISSN 1094-4087
Publisher: Optical Society of America
DOI: 10.1364/oe.427921

Characterization of the 3dδ Rydberg state of MgAr+ using a quantum-control optical scheme

Author(s): M. Génévriez, D. Wehrli, T. Berglitsch, F. Merkt
Published in: Physical Review A, 104, 2021, Page(s) 042811, ISSN 1094-1622
Publisher: American Physical Society
DOI: 10.1103/physreva.104.042811

Multipole-moment effects in ion–molecule reactions at low temperatures: part I – ion-dipole enhancement of the rate coefficients of the He+ + NH3 and He+ + ND3 reactions at collisional energies Ecoll/kB near 0 K

Author(s): Valentina Zhelyazkova, Fernanda B. V. Martins, Josef A. Agner, Hansjürg Schmutz, Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 23 (38), 2021, Page(s) 21606-21622, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/d1cp03116c

Charge-Transfer-Induced Predissociation in Rydberg States of Molecular Cations: MgAr+

Author(s): Dominik Wehrli, Matthieu Génévriez, Stefan Knecht, Markus Reiher, Frédéric Merkt
Published in: The Journal of Physical Chemistry A, 125 (31), 2021, Page(s) 6681-6696, ISSN 1089-5639
Publisher: American Chemical Society
DOI: 10.1021/acs.jpca.1c03859

Reactions of H2, HD, and D2 with H2+, HD+, and D2+: Product-Channel Branching Ratios and Simple Models

Author(s): Frédéric Merkt, Katharina Höveler, Johannes Deiglmayr
Published in: The Journal of Physical Chemistry Letters, 13, 2022, Page(s) 864-871, ISSN 1948-7185
Publisher: American Chemical Society
DOI: 10.1021/acs.jpclett.1c03374

Line shapes and line positions in PFI-ZEKE photoelectron and MATI spectra of positively charged ions

Author(s): D. Wehrli; U. Hollenstein; F. Merkt
Published in: Molecular Physics, 119 (10), 2021, Page(s) e1900613, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.3929/ethz-b-000492301

Multipole-moment effects in ion–molecule reactions at low temperatures: part I – ion-dipole enhancement of the rate coefficients of the He+ + NH3 and He+ + ND3 reactions at collisional energies Ecoll/kB near 0 K

Author(s): Valentina Zhelyazkova; Fernanda B. V. Martins; Josef A. Agner; Hansjürg Schmutz; Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 23(38), 2021, Page(s) 21606-21622, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/d1cp03116c

The H2+ + HD reaction at low collision energies: H3+/H2D+ branching ratio and product-kinetic energy distributions

Author(s): Katharina Höveler, Johannes Deiglmayr, Josef A. Agner, Hansjürg Schmutz, Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 23 (4), 2021, Page(s) 2676-2685, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/d0cp06107g

Ion-Molecule Reactions below 1 K: Strong Enhancement of the Reaction Rate of the Ion-Dipole Reaction He + + CH 3 F

Author(s): Valentina Zhelyazkova; Fernanda B. V. Martins; Josef A. Agner; Hansjürg Schmutz; Frédéric Merkt
Published in: Physical Review Letters, 125, 2020, Page(s) 263401, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.125.263401

SI-traceable frequency dissemination at 1572.06 nm in a stabilized fiber network with ring topology

Author(s): Dominik Husmann, Laurent-Guy Bernier, Mathieu Bertrand, Davide Calonico, Konstantinos Chaloulos, Gloria Clausen, Cecilia Clivati, Jérôme Faist, Ernst Heiri, Urs Hollenstein, Anatoly Johnson, Fabian Mauchle, Ziv Meir, Frédéric Merkt, Alberto Mura, Giacomo Scalari, Simon Scheidegger, Hansjürg Schmutz, Mudit Sinhal, Stefan Willitsch, Jacques Morel
Published in: Optics Express, 29 (16), 2021, Page(s) 24592-24605, ISSN 1094-4087
Publisher: Optical Society of America
DOI: 10.1364/oe.427921

Manipulating beams of paramagnetic atoms and molecules using inhomogeneous magnetic fields

Author(s): Paul Jansen; Frédéric Merkt
Published in: Progress in Nuclear Magnetic Resonance Spectroscopy, 120-121, 2021, Page(s) 118-148, ISSN 0079-6565
Publisher: Elsevier BV
DOI: 10.3929/ethz-b-000446029

The H2+ + HD reaction at low collision energies: H3+/H2D+ branching ratio and product-kinetic-energy distributions.

Author(s): Katharina Höveler; Johannes Deiglmayr; Josef A. Agner; Hansjürg Schmutz; Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 23 (4), 2021, Page(s) 2676-2685, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/d0cp06107g

Manipulating beams of paramagnetic atoms and molecules using inhomogeneous magnetic fields

Author(s): Paul Jansen, Frédéric Merkt
Published in: Progress in Nuclear Magnetic Resonance Spectroscopy, 120-121, 2020, Page(s) 118-148, ISSN 0079-6565
Publisher: Elsevier BV
DOI: 10.1016/j.pnmrs.2020.08.002

Charge-Transfer-Induced Predissociation in Rydberg States of Molecular Cations: MgAr

Author(s): Dominik Wehrli; Matthieu Génévriez; Stefan Knecht; Markus Reiher; Frédéric Merkt
Published in: The Journal of Physical Chemistry A, 125 (31), 2021, Page(s) 6681–6696, ISSN 1089-5639
Publisher: American Chemical Society
DOI: 10.1021/acs.jpca.1c03859

Deviation of the rate of the reaction from Langevin behaviour below 1 K, branching ratios for the and product channels, and product-kinetic-energy distributions

Author(s): Katharina Höveler; Johannes Deiglmayr; Frédéric Merkt
Published in: Molecular Physics, 119(17-18), 2021, Page(s) e1954708, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.1080/00268976.2021.1954708

Characterization of the 3dδ Rydberg state of MgAr+ using a quantum-control optical scheme

Author(s): M. Génévriez; D. Wehrli; T. Berglitsch; F. Merkt
Published in: Physical Review A, 104, 2021, Page(s) 042811, ISSN 1094-1622
Publisher: American Physical Society
DOI: 10.1103/physreva.104.042811

Rydberg-Stark deceleration and trapping of helium in magnetic fields

Author(s): Matija Žeško; Ondřej Tkáč; Josef A. Agner; Hansjürg Schmutz; Frédéric Merkt
Published in: Journal of Physics B: Atomic, Molecular and Optical Physics, 53 (19), 2020, Page(s) 195003, ISSN 0953-4075
Publisher: Institute of Physics Publishing
DOI: 10.1088/1361-6455/aba662

Complete characterization of the 3p Rydberg complex of a molecular ion: MgAr + . I. Observation of the Mg(3pσ)Ar + B + state and determination of its structure and dynamics

Author(s): Dominik Wehrli, Matthieu Génévriez, Stefan Knecht, Markus Reiher, Frédéric Merkt
Published in: The Journal of Chemical Physics, 153/7, 2020, Page(s) 074310, ISSN 0021-9606
Publisher: American Institute of Physics
DOI: 10.1063/5.0015603

Communication: Heavy-Rydberg states of HD and the electron affinity of the deuterium atom

Author(s): Maximilian Beyer, Frédéric Merkt
Published in: The Journal of Chemical Physics, 149/3, 2018, Page(s) 031102, ISSN 0021-9606
Publisher: American Institute of Physics
DOI: 10.1063/1.5043186

Metrology of high- n Rydberg states of molecular hydrogen with Δ ν / ν = 2 × 10 −

Author(s): Maximilian Beyer, Nicolas Hölsch, Josef A. Agner, Johannes Deiglmayr, Hansjürg Schmutz, Frédéric Merkt
Published in: Physical Review A, 97/1, 2018, Page(s) 012501, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/physreva.97.012501

Hyperfine-interaction-induced g/u mixing and its implication on the existence of the first excited vibrational level of the A+ Σu+2 state of H2+ and on the scattering length of the H + H + collision

Author(s): Maximilian Beyer, Frédéric Merkt
Published in: The Journal of Chemical Physics, 149/21, 2018, Page(s) 214301, ISSN 0021-9606
Publisher: American Institute of Physics
DOI: 10.1063/1.5046147

Dissociation Energy of the Hydrogen Molecule at 10 − 9 Accuracy

Author(s): C.-F. Cheng, J. Hussels, M. Niu, H. L. Bethlem, K. S. E. Eikema, E. J. Salumbides, W. Ubachs, M. Beyer, N. Hölsch, J. A. Agner, F. Merkt, L.-G. Tao, S.-M. Hu, Ch. Jungen
Published in: Physical Review Letters, 121/1, 2018, Page(s) 013001, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.121.013001

Nonadiabatic effects on the positions and lifetimes of the low-lying rovibrational levels of the GK 1 Σ+g and H 1 Σ+g states of H 2

Author(s): Nicolas Hölsch, Maximilian Beyer, Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 20/42, 2018, Page(s) 26837-26845, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/c8cp05233f

High-resolution photoelectron spectroscopy and calculations of the highest bound levels of ${{\rm{D}}}_{2}^{+}$ below the first dissociation threshold

Author(s): Maximilian Beyer, Frédéric Merkt
Published in: Journal of Physics B: Atomic, Molecular and Optical Physics, 50/15, 2017, Page(s) 154005, ISSN 0953-4075
Publisher: Institute of Physics Publishing
DOI: 10.1088/1361-6455/aa7ac9

Molecular-beam resonance method with Zeeman-decelerated samples: Application to metastable helium molecules

Author(s): Luca Semeria, Paul Jansen, Gloria Clausen, Josef A. Agner, Hansjürg Schmutz, Frédéric Merkt
Published in: Physical Review A, 98/6, 2018, Page(s) 062518, ISSN 2469-9926
Publisher: American Physics Society
DOI: 10.1103/physreva.98.062518

Fundamental vibration frequency and rotational structure of the first excited vibrational level of the molecular helium ion (He2+)

Author(s): Paul Jansen, Luca Semeria, Frédéric Merkt
Published in: The Journal of Chemical Physics, 149/15, 2018, Page(s) 154302, ISSN 0021-9606
Publisher: American Institute of Physics
DOI: 10.1063/1.5051089

PFI-ZEKE photoelectron spectroscopy of positively charged ions: illustration with Mg+

Author(s): M. Génévriez, D. Wehrli, J.A. Agner, F. Merkt
Published in: International Journal of Mass Spectrometry, 435, 2019, Page(s) 209-216, ISSN 1387-3806
Publisher: Elsevier BV
DOI: 10.1016/j.ijms.2018.10.017

Half-Collision Approach to Cold Chemistry: Shape Resonances, Elastic Scattering, and Radiative Association in the H + + H

Author(s): Maximilian Beyer, Frédéric Merkt
Published in: Physical Review X, 8/3, 2018, Page(s) 031085, ISSN 2160-3308
Publisher: American Physical Society
DOI: 10.1103/physrevx.8.031085

Determination of the Spin-Rotation Fine Structure of He 2 +

Author(s): Paul Jansen, Luca Semeria, Frédéric Merkt
Published in: Physical Review Letters, 120/4, 2018, Page(s) 043001, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.120.043001

Fluorescence-lifetime-limited trapping of Rydberg helium atoms on a chip

Author(s): V. Zhelyazkova, M. Žeško*, H. Schmutz, J. A. Agner, F. Merkt
Published in: Molecular Physics, 117/21, 2019, Page(s) 2980-2989, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.1080/00268976.2019.1600060

Precision measurement of the ionization energy and quantum defects of K 39 i

Author(s): Michael Peper, Felix Helmrich, Jonas Butscher, Josef Anton Agner, Hansjürg Schmutz, Frédéric Merkt, Johannes Deiglmayr
Published in: Physical Review A, 100/1, 2019, ISSN 2469-9926
Publisher: American Physical Society
DOI: 10.1103/PhysRevA.100.012501

Roadmap on photonic, electronic and atomic collision physics: III. Heavy particles: with zero to relativistic speeds

Author(s): Friedrich Aumayr, Kiyoshi Ueda, Emma Sokell, Stefan Schippers, Hossein Sadeghpour, Frédéric Merkt, Thomas F Gallagher, F Barry Dunning, Paul Scheier, Olof Echt, Tom Kirchner, Stephan Fritzsche, Andrey Surzhykov, Xinwen Ma, Roberto Rivarola, Omar Fojon, Lokesh Tribedi, Emily Lamour, José R Crespo López-Urrutia, Yuri A Litvinov, Vladimir Shabaev, Henrik Cederquist, Henning Zettergren, Marika S
Published in: Journal of Physics B: Atomic, Molecular and Optical Physics, 52/17, 2019, Page(s) 171003, ISSN 0953-4075
Publisher: Institute of Physics Publishing
DOI: 10.1088/1361-6455/ab26ea

Autoionization rates of core-excited magnesium Rydberg atoms in electric fields using the core fluorescence as a reference

Author(s): D. Wehrli, M. Génévriez, F. Merkt
Published in: Physical Review A, 100/1, 2019, ISSN 2469-9926
Publisher: American Institute of Physics
DOI: 10.1103/PhysRevA.100.012515

Benchmarking Theory with an Improved Measurement of the Ionization and Dissociation Energies of H 2

Author(s): Nicolas Hölsch, Maximilian Beyer, Edcel J. Salumbides, Kjeld S. E. Eikema, Wim Ubachs, Christian Jungen, Frédéric Merkt
Published in: Physical Review Letters, 122/10, 2019, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/PhysRevLett.122.103002

The adiabatic ionisation energy of CO 2

Author(s): U. Hollenstein, K. Dulitz, F. Merkt
Published in: Molecular Physics, 117/21, 2019, Page(s) 2956-2960, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.1080/00268976.2019.1600061

High-resolution spectroscopy of the transition of MgAr+ by isolated-core multiphoton Rydberg dissociation

Author(s): M. Génévriez, D. Wehrli, F. Merkt
Published in: Molecular Physics, HRMS2019, 2019, Page(s) 1-8, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.1080/00268976.2019.1703051

Determination of the Interval between the Ground States of Para- and Ortho- H 2

Author(s): M. Beyer, N. Hölsch, J. Hussels, C.-F. Cheng, E. J. Salumbides, K. S. E. Eikema, W. Ubachs, Ch. Jungen, F. Merkt
Published in: Physical Review Letters, 123/16, 2019, Page(s) 163002, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.123.163002

Determination of the Interaction Potential and Rovibrational Structure of the Ground Electronic State of MgAr + Using PFI-ZEKE Photoelectron Spectroscopy

Author(s): Dominik Wehrli, Matthieu Génévriez, Carla Kreis, Josef A. Agner, Frédéric Merkt
Published in: The Journal of Physical Chemistry A, 124/2, 2019, Page(s) 379-385, ISSN 1089-5639
Publisher: American Chemical Society
DOI: 10.1021/acs.jpca.9b10435

Experimental and theoretical study of core-excited 3 p n d Rydberg series of Mg

Author(s): Matthieu Génévriez, Dominik Wehrli, Frédéric Merkt
Published in: Physical Review A, 100/3, 2019, Page(s) 032517, ISSN 2469-9926
Publisher: American Institute of Physics
DOI: 10.1103/physreva.100.032517

Magic Rydberg-Rydberg transitions in electric fields

Author(s): Michael Peper, Johannes Deiglmayr, Frédéric Merkt, Carla Sanna, H. B. van Linden van den Heuvell
Published in: Physical Review A, 100/3, 2019, Page(s) 032512, ISSN 2469-9926
Publisher: American Institute of Physics
DOI: 10.1103/physreva.100.032512

Precision Measurements in Few-Electron Molecules: The Ionization Energy of Metastable He 4

Author(s): Luca Semeria, Paul Jansen, Gian-Marco Camenisch, Federico Mellini, Hansjürg Schmutz, Frédéric Merkt
Published in: Physical Review Letters, 124/21, 2020, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.124.213001

Spectroscopy of Highly Excited States of the Hydrogen Atom

Author(s): Simon Scheidegger, Frédéric Merkt
Published in: CHIMIA International Journal for Chemistry, 74/4, 2020, Page(s) 285-288, ISSN 0009-4293
Publisher: Schweizerische Chemische Gedellschaft
DOI: 10.2533/chimia.2020.285

Deviation of the rate of the H2+ + D2 reaction from Langevin behaviour below 1 K, branching ratios for the HD2+ + H and H2D+ + D product channels, and product-​kinetic-energy distributions

Author(s): Katharina Höveler, Johannes Deiglmayr, Frédéric Merkt
Published in: Molecular Physics, 119 (17-18), 2021, Page(s) e1954708, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.1080/00268976.2021.1954708

Ion-Molecule Reactions below 1 K: Strong Enhancement of the Reaction Rate of the Ion-Dipole Reaction He+ + CH3F

Author(s): Valentina Zhelyazkova, Fernanda B. V. Martins, Josef A. Agner, Hansjürg Schmutz, Frédéric Merkt
Published in: Physical Review Letters, 125, 2020, Page(s) 263401, ISSN 0031-9007
Publisher: American Physical Society
DOI: 10.1103/physrevlett.125.263401

Spectroscopic characterization of a thermodynamically stable doubly charged diatomic molecule: MgAr2+

Author(s): Dominik Wehrli, Matthieu Génévriez, Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 23 (18), 2021, Page(s) 10978-10987, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/d1cp00730k

Complete characterization of the 3 p Rydberg complex of a molecular ion: MgAr + . II. Global analysis of the A + 2 Π and B + 2 Σ + (3pσ,π) states

Author(s): Matthieu Génévriez, Dominik Wehrli, Frédéric Merkt
Published in: The Journal of Chemical Physics, 153/7, 2020, Page(s) 074311, ISSN 0021-9606
Publisher: American Institute of Physics
DOI: 10.1063/5.0015608

Cold ion chemistry within a Rydberg-electron orbit: test of the spectator role of the Rydberg electron in the He(n) + CO → C(n') + O + He reaction

Author(s): Fernanda B V Martins; Valentina Zhelyazkova; Christian Seiler; Frédéric Merkt
Published in: New Journal of Physics,, 23 (9), 2021, Page(s) 095011, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ac231d

Spectroscopic characterization of a thermodynamically stable doubly charged diatomic molecule: MgAr2+

Author(s): Dominik Wehrli; Matthieu Génévriez; Frédéric Merkt
Published in: Physical Chemistry Chemical Physics, 23 (18), 2021, Page(s) 10978-10987, ISSN 1463-9076
Publisher: Royal Society of Chemistry
DOI: 10.1039/d1cp00730k

Cold ion chemistry within a Rydberg-electron orbit: test of the spectator role of the Rydberg electron in the He(n) + CO → C(n') + O + He reaction

Author(s): Fernanda B V Martins, Valentina Zhelyazkova, Christian Seiler, Frédéric Merkt
Published in: New Journal of Physics, 23 (9), 2021, Page(s) 095011, ISSN 1367-2630
Publisher: Institute of Physics Publishing
DOI: 10.1088/1367-2630/ac231d

Line shapes and line positions in PFI-ZEKE photoelectron and MATI spectra of positively charged ions

Author(s): D. Wehrli, U. Hollenstein, F. Merkt
Published in: Molecular Physics, 119 (10), 2021, Page(s) e1900613, ISSN 0026-8976
Publisher: Taylor & Francis
DOI: 10.1080/00268976.2021.1900613

Rydberg–Stark deceleration and trapping of helium in magnetic fields

Author(s): Matija Žeško, Ondřej Tkáč, Josef A Agner, Hansjürg Schmutz, Frédéric Merkt
Published in: Journal of Physics B: Atomic, Molecular and Optical Physics, 53 (19), 2020, Page(s) 195003, ISSN 0953-4075
Publisher: Institute of Physics Publishing
DOI: 10.1088/1361-6455/aba662