Results 11 to 20 of about 116 (97)
Zeeman deceleration beyond periodic phase space stability
New Journal of Physics, 2017 In Zeeman deceleration, time-varying spatially inhomogeneous magnetic fields are used to create packets of translationally cold, quantum-state-selected paramagnetic particles with a tuneable forward velocity, which are ideal for cold reaction dynamics ...
Jutta Toscano +5 more
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Zeeman deceleration of electron-impact-excited metastable helium atoms
New Journal of Physics, 2015 We present experimental results that demonstrate—for the first time—the Zeeman deceleration of helium atoms in the metastable 2 ^3 S _1 state. A more than 40% decrease of the kinetic energy of the beam is achieved for deceleration from 490 m s ^−1 to a ...
Katrin Dulitz +2 more
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Evolutionary Algorithm Optimization of Zeeman Deceleration: Is It Worthwhile for Longer Decelerators? [PDF]
J Phys Chem A, 2019 In Zeeman deceleration, only a small subset of low-field-seeking particles in the incoming beam possess initial velocities and positions that place them within the phase-space acceptance of the device. In order to maximize the number of particles that are successfully decelerated to a selected final velocity, we seek to optimize the phase-space ...
Toscano J +3 more
europepmc +5 more sources
Low-Energy Collisions of Zeeman-Decelerated NH Radicals with He Atoms. [PDF]
J Phys Chem A, 2023 We report an experimental study of state-to-state inelastic scattering of NH (X 3Σ-, N = 0, j = 1) radicals with He atoms. Using a crossed molecular beam apparatus that combines a Zeeman decelerator and velocity map imaging, we study both integral and differential cross sections in the N = 0, j = 1 → N = 2, j = 3 inelastic channel. We developed various
Plomp V +3 more
europepmc +5 more sources
Zeeman-Sisyphus Deceleration of Molecular Beams [PDF]
Physical Review Letters, 2021 We present a robust, continuous molecular decelerator that employs high magnetic fields and few optical pumping steps. CaOH molecules are slowed, accumulating at low velocities in a range sufficient for loading both magnetic and magneto-optical traps. During the slowing, the molecules scatter only 7 photons, removing around 8 K of energy. Because large
Benjamin L. Augenbraun +7 more
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Optimizing the intensity and purity of a Zeeman-decelerated beam [PDF]
Review of Scientific Instruments, 2021 A pure, state-selected beam of gas-phase radicals is an important tool for the precise study of radical reactions that are astrochemically and atmospherically relevant. Generating such a beam has proven to be an ongoing challenge for the scientific community. Using evolutionary algorithms to optimize the variable experimental parameters, the passage of
Mohamed, O +3 more
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Multistage Zeeman deceleration of metastable neon [PDF]
The Journal of Chemical Physics, 2011 A supersonic beam of metastable neon atoms has been decelerated by exploiting the interaction between the magnetic moment of the atoms and time-dependent inhomogeneous magnetic fields in a multistage Zeeman decelerator. Using 91 deceleration solenoids, the atoms were decelerated from an initial velocity of \documentclass[12pt]{minimal}\begin{document}$\
Wiederkehr Alex W. +7 more
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Imaging Resonance Effects in C + H2 Collisions Using a Zeeman Decelerator. [PDF]
J Phys Chem LettAn intriguing phenomenon in molecular collisions is the occurrence of scattering resonances, which originate from bound and quasi-bound states supported by the interaction potential at low collision energies. The resonance effects in the scattering behaviour are extraordinarily sensitive to the interaction potential, and their observation provides one ...
Plomp V +6 more
europepmc +6 more sources
Magnetic Trapping of Hydrogen after Multistage Zeeman Deceleration [PDF]
Physical Review Letters, 2008 We report the first experimental realization of magnetic trapping of a sample of cold radicals following multistage Zeeman deceleration of a pulsed supersonic beam. H atoms seeded in a supersonic expansion of Kr have been decelerated from an initial velocity of 520 m/s to 100 m/s in a 12-stage Zeeman decelerator and loaded into a magnetic quadrupole ...
Hogan, SD +3 more
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Simultaneous deceleration of atoms and molecules in a supersonic beam
New Journal of Physics, 2015 A unique property of Zeeman effect based manipulation of paramagnetic particle’s motion is the ability to control velocities of both atoms and molecules.
Nitzan Akerman +5 more
doaj +1 more source