GR-OST

Lab Key visual
Production and applications of translationally cold neutral molecules. – Study of chemical reactions below 1 K.

We study gas-phase chemical reactions in which we aim to control all degrees of freedom of the colliding particles, including internal states, relative velocity, and relative orientation. Observing a molecular scattering event with this degree of control provides the deepest insight into chemical reactions and allows us to study some of the most fundamental concepts in chemistry.

We investigate, in particular, polyatomic chemical reactions at energies as little as 80 mK above absolute zero. We reach these low collision energies merging two neutral supersonic expansions into a single beam such that relative molecular velocities are low even if the beams are fast in the laboratory.

2019

Energy and orientation independence of the channel branching in Ne* + ND3 chemi-ionisation

S. D. S. Gordon; A. Osterwalder 

Physical Chemistry Chemical Physics

2019-01-15

DOI : 10.1039/C8CP06666C

2018

Quantum-state-controlled channel branching in cold Ne(3P2)+Ar chemi-ionization

S. D. S. Gordon; J. J. Omiste; J. Zou; S. Tanteri; P. Brumer et al. 

Nature Chemistry

2018-10-08

Vol. 43 , p. 7279.

DOI : 10.1038/s41557-018-0152-2

Stereodynamics of Ne(3P2) reacting with Ar, Kr, Xe, and N2

J. Zou; S. D. S. Gordon; S. Tanteri; A. Osterwalder 

The Journal of Chemical Physics

2018-04-30

Vol. 148 , num. 16, p. 164310.

DOI : 10.1063/1.5026952

2017

Energy dependent stereodynamics of the Ne(3P2)+Ar reaction

S. D. S. Gordon; J. Zou; S. Tanteri; J. Jankunas; A. Osterwalder 

Physical Review Letters

2017

Vol. 119 , p. 053001.

DOI : 10.1103/PhysRevLett.119.053001

3D-Printed Beam Splitter for Polar Neutral Molecules

S. D. Gordon; A. Osterwalder 

Physical Review Applied

2017

Vol. 7 , num. 4, p. 044022.

DOI : 10.1103/PhysRevApplied.7.044022

Call for papers: Roll over hydrogen: a fundamental system in all states

O. Dulieu; A. Alnaser; J. Colgan; E. Grant; E. Krishnakumar et al. 

Journal Of Physics B-Atomic Molecular And Optical Physics

2017

Vol. 50 , num. 1, p. 010201.

DOI : 10.1088/1361-6455/50/1/010201

A 3D printed beam splitter for polar neutral molecules

S. D. S. Gordon; A. Osterwalder 

Physical Review Applied

2017

Vol. 7 , num. 4, p. 044022.

DOI : 10.1103/PhysRevApplied.7.044022

2016

Experimental and Theoretical Studies of Low-Energy Penning Ionization of NH3, CH3F, and CHF3

K. Jachymski; M. Hapka; J. Jankunas; A. Osterwalder 

ChemPhysChem

2016

Vol. 17 , p. 3776.

DOI : 10.1002/cphc.201600608

Importance of rotationally inelastic processes in low-energy Penning ionization of CHF3

J. Jankunas; K. Jachymski; M. Hapka; A. Osterwalder 

Journal of Chemical Physics

2016

Vol. 144 , p. 221102.

DOI : 10.1063/1.4953908

Oriented O(3P2), Ne(3P2), and He(3S1) atoms emerging from a bent magnetic guide

J. Jankunas; K. S. Reisyan; T. P. Rakitzis; A. Osterwalder 

Molecular Physics

2016

Vol. 114 , num. 2, p. 245-252.

DOI : 10.1080/00268976.2015.1095363

2015

Merged neutral beams

A. Osterwalder 

EPJ Techniques and Instrumentation

2015

Vol. 2 , num. 1, p. 10.

DOI : 10.1140/epjti/s40485-015-0022-x

Observation of orbiting resonances in He(3S1) + NH3 Penning ionization

J. Jankunas; K. Jachymski; M. Hapka; A. Osterwalder 

The Journal of Chemical Physics

2015

Vol. 142 , num. 16, p. 164305.

DOI : 10.1063/1.4919369

Cold and Controlled Molecular Beams: Production and Applications

J. Jankunas; A. Osterwalder 

Annual Review of Physical Chemistry

2015

Vol. 66 , num. 1, p. 241-262.

DOI : 10.1146/annurev-physchem-040214-121307

Preparation of state purified beams of He, Ne, C, N, and O atoms

J. Jankunas; K. S. Reisyan; A. Osterwalder 

The Journal of Chemical Physics

2015

Vol. 142 , num. 10, p. 104311.

DOI : 10.1063/1.4914332

2014

Viewpoint: Slowing Continuous Molecular Beams in a Rotating Spira

A. Osterwalder 

Physics

2014

Vol. 7 , p. 2.

Study of the Ne(3P2) + CH3F Electron-Transfer Reaction below 1 K

J. Jankunas; B. Bertsche; A. Osterwalder 

The Journal of Physical Chemistry A

2014

Vol. 118 , num. 22, p. 3875-3879.

DOI : 10.1021/jp502989g

Dynamics of gas phase Ne* + NH3 and Ne* + ND3 Penning ionisation at low temperatures

J. Jankunas; B. Bertsche; K. Jachymski; M. Hapka; A. Osterwalder 

Journal of Chemical Physics

2014

Vol. 140 , p. 244302.

DOI : 10.1063/1.4883517

Low-temperature Collisions between Neutral Molecules in Merged Molecular Beams

B. Bertsche; J. Jankunas; A. Osterwalder 

Chimia

2014

Vol. 68 , num. 4, p. 256-259.

DOI : 10.2533/chimia.2014.256

2012

Traveling-wave deceleration of heavy polar molecules in low-field-seeking states

N. E. Bulleid; R. J. Hendricks; E. A. Hinds; S. A. Meek; G. Meijer et al. 

Physical Review A

2012

Vol. 86 , num. 2.

DOI : 10.1103/PhysRevA.86.021404

LASER PARTICLE ACCELERATION Pushing atoms with light

A. Osterwalder 

Nature Photonics

2012

Vol. 6 , p. 344-347.

DOI : 10.1038/nphoton.2012.115

2011

Preparation of Translationally Cold Neutral Molecules

G. Di Domenicantonio; B. Bertsche; A. Osterwalder 

Chimia

2011

Vol. 65 , p. 725-729.

DOI : 10.2533/chimia.2011.725

Dynamics of individual rotational states in an electrostatic guide for neutral molecules

B. Bertsche; A. Osterwalder 

Physical Chemistry Chemical Physics

2011

Vol. 13 , p. 18954.

DOI : 10.1039/c1cp21277j

A traveling wave decelerator for neutral polar molecules

S. A. Meek; M. F. Parsons; G. Heyne; V. Platschkowski; H. Haak et al. 

Review of Scientific Instruments

2011

Vol. 82 , num. 9, p. 093108.

DOI : 10.1063/1.3640413

2010

State-selective detection of velocity-filtered ND3 molecules

B. Bertsche; A. Osterwalder 

Physical Review A

2010

Vol. 82 , num. 3, p. 033418.

DOI : 10.1103/PhysRevA.82.033418

Deceleration of neutral molecules in macroscopic traveling traps

A. Osterwalder; S. A. Meek; G. Hammer; H. Haak; G. Meijer 

Physical Review A

2010

Vol. 81 , num. 5, p. 051401.

DOI : 10.1103/PhysRevA.81.051401

2006

Slow electron velocity-map imaging photoelectron spectra of the methoxide anion

M. J. Nee; A. Osterwalder; J. Zhou; D. M. Neumark 

Journal of Chemical Physics

2006

Vol. 125 , num. 1, p. 014306/1-014306/9.

DOI : 10.1063/1.2212411

2005

High resolution photoelectron spectra of carbon cluster anions and their monohydrides

M. J. Nee; A. Osterwalder; J. Zhou; D. M. Neumark 

Abstracts of Papers, 229th ACS National Meeting, San Diego, CA, United States, March 13-17, 2005

2005

p. PHYS-385

2004

Theoretical and experimental study of the IR spectrum of the BrHI and BrDI anions

T. Xie; A. L. Kaledin; J. M. Bowman; S. Carter; M. J. Nee et al. 

Abstracts of Papers, 228th ACS National Meeting, Philadelphia, PA, United States, August 22-26, 2004

2004

p. PHYS-528

High resolution photodetachment spectroscopy of negative ions via slow photoelectron imaging

A. Osterwalder; M. J. Nee; J. Zhou; D. M. Neumark 

Journal of Chemical Physics

2004

Vol. 121 , num. 13, p. 6317-6322.

DOI : 10.1063/1.1787491

2001

Threshold photoionization at high resolution

F. Merkt; A. Osterwalder; U. Hollenstein; R. Seiler; M. Sommavilla 

Abstracts of Papers, 221st ACS National Meeting, San Diego, CA, United States, April 1-5, 2001

2001

p. PHYS-041

High-resolution vacuum ultraviolet photoelectron spectroscopy

U. Hollenstein; R. Seiler; A. Osterwalder; M. Sommavilla; A. Wuest et al. 

Chimia

2001

Vol. 55 , num. 10, p. 759-762.