A5026769325- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Molecular Physics
- Advanced Chemical Physics Studies
- Atomic and Subatomic Physics Research
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Advanced Frequency and Time Standards
- Various Chemistry Research Topics
- Laser-Matter Interactions and Applications
- Radioactive Decay and Measurement Techniques
- Photocathodes and Microchannel Plates
- Quantum Mechanics and Applications
- Neutrino Physics Research
- Quantum, superfluid, helium dynamics
- Microfluidic and Capillary Electrophoresis Applications
- Quantum Information and Cryptography
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Advanced NMR Techniques and Applications
- Solid-state spectroscopy and crystallography
- NMR spectroscopy and applications
National Institute for Subatomic Physics
2019-2024
University of Groningen
2019-2024
Tel Aviv University
2021
Vrije Universiteit Amsterdam
2021
The NL-eEDM collaboration is building an experimental setup to search for the permanent electric dipole moment of electron in a slow beam cold barium fluoride molecules [Eur. Phys. J. D, 72, 197 (2018)]. Knowledge molecular properties BaF thus needed plan measurements and particular determine optimal laser-cooling scheme. Accurate reliable theoretical predictions these require incorporation both high-order correlation relativistic effects calculations. In this work investigations ground...
We report on the electrostatic trapping of neutral SrF molecules. The molecules are captured from a cryogenic buffer-gas beam source into moving traps 4.5-m-long traveling-wave Stark decelerator. in X^{2}Σ^{+}(v=0,N=1) state brought to rest as velocity is gradually reduced 190 m/s zero. held for up 50 ms multiple electric trapped packets have volume (FWHM) 1 mm^{3} and spread 5(1) m/s, which corresponds temperature 60(20) mK. Our result demonstrates factor 3 increase molecular mass that has...
We demonstrate a novel method to determine the longitudinal phase-space distribution of cryogenic buffer gas beam barium-fluoride molecules based on two-step laser excitation scheme. The spatial resolution is achieved by transversely aligned that drives from ground state $X^2\Sigma^+$ $A^2\Pi_{1/2}$ around 860 nm, while velocity obtained counter-propagating with respect molecular and Doppler shifted $D^2\Sigma^+$ transition 797 nm. Molecules in $D$-state are detected virtually...
Abstract Recently, we have demonstrated a method to record the longitudinal phase-space distribution of pulsed cryogenic buffer gas cooled beam barium fluoride molecules with high resolution. In this paper, use determine influence various source parameters. Besides expected dependence on temperature and pressure, forward velocity is strongly correlated time they exit cell, revealing dynamics inside cell. Three observations are particularly noteworthy: (1) The increases rapidly as function...
A supersonic beam source for SrF and BaF molecules is constructed by combining the expansion of carrier gas (a mixture 2% SF6 98% argon) from an Even–Lavie valve with laser ablation a barium/strontium metal target at repetition rate 10 Hz. Molecular beams narrow translational velocity spread are produced relative values Δv/v = 0.053(11) 0.054(9) BaF, respectively. The in our lower comparison results other fluoride sources. rotational temperature measured to be 3.5 K. produces 6 × 108 107 per...
Abstract An electrostatic hexapole lens is used to manipulate the transverse properties of a beam barium fluoride molecules from cryogenic buffer gas source. The spatial distribution measured by recording state-selective laser-induced fluorescence on an emccd camera, providing insight into intensity and position spread molecular beam. Although high mass unfavorable Stark shift pose considerable challenge, number in low-field seeking component N = 1 state that pass 4 mm diameter aperture 712...
We present an investigation of the performance relativistic multi-reference Fock-space coupled cluster (FSCC) method for predicting molecular hyperfine structure (HFS) constants, including a thorough computational study to estimate associated uncertainties. In particular, we considered $^{19}$F HFS constant in ground and excited states BaF. Due larger basis set dependence, uncertainties on state results (16-85%) were found be significantly than those constants ($\sim$2%). The ab initio...
Time resolved detection of laser induced fluorescence from pulsed excitation electronic states in barium monofluoride (BaF) molecules has been performed order to determine the lifetimes $A^2\Pi_{1/2}$ and $A^2\Pi_{3/2}$ states. The method permits control over experimental parameters such that systematic biases interpretation data can be controlled below $10^{-3}$ relative accuracy. statistically limited values for $A^2\Pi_{1/2}(\nu=0)$ $A^2\Pi_{3/2}(\nu=0)$ are 57.1(3) ns 47.9(7)~ns,...
We demonstrate a spin-precession method to observe and analyze multi-level coherence between all hyperfine levels in the $X ^2\Sigma^+,N=0$ ground state of barium monofluoride ($^{138}$Ba$^{19}$F). The signal is sensitive state-preparation Rabi frequency external electric magnetic fields applied searches for permanent dipole moment (EDM). In obtained interference spectrum, field become observable simultaneously with EDM. This reduces systematic biases number auxiliary measurements such...
Recently, we have demonstrated a method to record the longitudinal phase-space distribution of pulsed cryogenic buffer gas cooled beam barium fluoride molecules. In this paper, use determine influence various source parameters. Besides expected dependence on temperature and pressure, forward velocity molecules is strongly correlated with time they exit cell, revealing dynamics inside cell. Three observations are particularly noteworthy: (1) The increases rapidly as function time, reaches...
An electrostatic hexapole lens is used to manipulate the transverse properties of a beam barium fluoride molecules from cryogenic buffer gas source. The spatial distribution measured by recording state-selective laser-induced fluorescence on an emccd camera, providing insight into intensity and position spread molecular beam. Although high mass unfavorable Stark shift pose considerable challenge, number in low-field seeking component N=1 state that pass 4 mm diameter aperture 712 behind...
Abstract We demonstrate a method to determine the longitudinal phase-space distribution of cryogenic buffer gas cooled beam barium-fluoride molecules based on two-step laser excitation scheme. Temporal resolution is achieved by transversely aligned that drives from ground state $X^2\Sigma^+$ $A^2\Pi_{1/2}$ around 860\;nm, while velocity obtained counter-propagating with respect molecular and Doppler shifted $D^2\Sigma^+$ transition 797\;nm. Molecules in $D$-state are detected background-free...
A measurement of the magnitude electric dipole moment electron (eEDM) larger than that predicted by Standard Model (SM) particle physics is expected to have a huge impact on search for beyond SM. Polar diatomic molecules containing heavy elements experience enhanced sensitivity parity ($P$) and time-reversal ($T$)-violating phenomena, such as eEDM scalar-pseudoscalar (S-PS) interaction between nucleons electrons, are thus promising candidates measurements. The NL-\textit{e}EDM collaboration...