High-Resolution Probe of Coherence in Low-Energy Charge Exchange Collisions with Oriented Targets

Leredde, A.; Fléchard, X.; Cassimi, A.; Hennecart, D.; Pons, B.

doi:10.1103/physrevlett.111.133201

Cited by 5 publications

(3 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, substantially lower temperatures (mK or below) can be achieved and target atoms can be prepared in excited and polarized states (e.g. [4][5][6]).…”

Section: Introductionmentioning

confidence: 99%

All-optical atom trap as a target for MOTRIMS-like collision experiments

et al. 2018

View full text Add to dashboard Cite

Momentum-resolved scattering experiments with laser-cooled atomic targets have been performed since almost two decades with MOTRIMS (Magneto-Optical Trap Recoil Ion Momentum Spectroscopy) setups. Compared to experiments with gas-jet targets, MOTRIMS features significantly lower target temperatures allowing for an excellent recoil ion momentum resolution. However, the coincident and momentum-resolved detection of electrons was long rendered impossible due to incompatible magnetic field requirements. Here we report on a novel experimental approach which is based on an all-optical 6 Li atom trap that -in contrast to magneto-optical traps -does not require magnetic field gradients in the trapping region. Atom temperatures of about 2 mK and number densities up to 10 9 cm −3 make this trap ideally suited for momentum-resolved electron-ion coincidence experiments. The overall configuration of the new trap is very similar to conventional magnetooptical traps. It mainly requires small modifications of laser beam geometries and polarization which makes it easily implementable in other existing MOTRIMS experiments.

show abstract

“…Here, substantially lower temperatures (mK or below) can be achieved and target atoms can be prepared in excited and polarized states (e.g. [4][5][6]).…”

Section: Introductionmentioning

confidence: 99%

All-optical atom trap as a target for MOTRIMS-like collision experiments

et al. 2018

View full text Add to dashboard Cite

show abstract

“…The corresponding duty cycle of less than 0.1 % could be increased by keeping the atoms in the vicinity of the trapping position e.g. by the synchronized switch-off of the laser beams 48 . However, without the optical molasses, i.e.…”

Section: The Operation Of the Reaction Microscope: Fast Magnetic Fielmentioning

confidence: 99%

Electron and recoil ion momentum imaging with a magneto-optically trapped target

Hubele

Schuricke

Goullon

et al. 2015

Review of Scientific Instruments

View full text Add to dashboard Cite

A reaction microscope (ReMi) has been combined with a magneto-optical trap (MOT) for the kinematically complete investigation of atomic break-up processes. With the novel MOTReMi apparatus, the momentum vectors of the fragments of laser-cooled and state-prepared lithium atoms are measured in coincidence and over the full solid angle. The first successful implementation of a MOTReMi could be realized due to an optimized design of the present setup, a nonstandard operation of the MOT, and by employing a switching cycle with alternating measuring and trapping periods. The very low target temperature in the MOT (∼ 2 mK) allow for an excellent momentum resolution. Optical preparation of the target atoms in the excited Li 2 2 P 3/2 state was demonstrated providing an atomic polarization of close to 100 %. While first experimental results were reported earlier, in this work we focus on the technical description of the setup and its performance in commissioning experiments involving target ionization in 266 nm laser pulses and in collisions with projectile ions.

show abstract

“…In the present study, we demonstrate that left-right asymmetries can already be generated in atomic ionization by purely linearly polarized light if the target atoms are initially polarized. On the experimental side, it has been shown previously that optical traps are an ideal tool to provide excited and polarized atomic targets for ionatom scattering [21,22] or photoionization experiments [23][24][25]. Here we use an all-optical atom trap (AOT) [26] to prepare an excited lithium target in the polarized 2p configuration with m = +1.…”

Section: Introductionmentioning

confidence: 99%

Magnetic dichroism in few-photon ionization of polarized atoms

et al. 2021

View full text Add to dashboard Cite

We consider few-photon ionization of atomic lithium by linearly polarized femtosecond laser pulses, and demonstrate that asymmetries of the electron angular distribution can occur for initially polarized (2p, m=+1) target atoms. The dependence of the photoelectron emission angle relative to the electric field direction is investigated at different laser intensities and wavelengths. The experimental spectra show excellent agreement with numerical solutions of the time-dependent Schrödinger equation. In the perturbative picture, the angular shift is traced back to interferences between partial waves with mean magnetic quantum number m = 0. This observation allows us to obtain quantum mechanical information on the final electronic state.

show abstract

High-Resolution Probe of Coherence in Low-Energy Charge Exchange Collisions with Oriented Targets

Cited by 5 publications

References 34 publications

All-optical atom trap as a target for MOTRIMS-like collision experiments

All-optical atom trap as a target for MOTRIMS-like collision experiments

Electron and recoil ion momentum imaging with a magneto-optically trapped target

Magnetic dichroism in few-photon ionization of polarized atoms

Contact Info

Product

Resources

About