9 research outputs found
A supersonic laser ablation beam source with narrow velocity spreads
A supersonic beam source for SrF and BaF molecules is constructed by combining the expansion of carrier gas (a mixture of 2% SF6 and 98% argon) from an Even-Lavie valve with laser ablation of a barium/strontium metal target at a repetition rate of 10 Hz. Molecular beams with a narrow translational velocity spread are produced at relative values of Δv/v = 0.053(11) and 0.054(9) for SrF and BaF, respectively. The relative velocity spread of the beams produced in our source is lower in comparison with the results from other metal fluoride beams produced in supersonic laser ablation sources. The rotational temperature of BaF is measured to be 3.5 K. The source produces 6 × 108 and 107 molecules per steradian per pulse in the X2ς+ (ν = 0, N = 1) state of BaF and SrF molecules, respectively, a state amenable to Stark deceleration and laser cooling
Lifetime measurements of the A (2)Pi(1/2) and A (2)Pi(3/2) states in BaF
Time resolved detection of laser induced fluorescence from pulsed excitation
of electronic states in barium monofluoride (BaF) molecules has been performed
in order to determine the lifetimes of the and
states. The method permits control over experimental parameters such that
systematic biases in the interpretation of the data can be controlled to below
relative accuracy. The statistically limited values for the lifetimes
of the and states are 57.1(3) ns
and 47.9(7)~ns, respectively. The ratio of these values is in good agreement
with scaling for the different excitation energies. The investigated molecular
states are of relevance for an experimental search for a permanent electric
dipole moment (EDM) of the electron in BaF
Investigation into the bimodal transportation process by modelling rail module states
The bimodal transportation process, which takes into account the modelling of rail module states, has been studied. The article demonstrates marked graphs of rail module states with and without running gear change in operation. It has been established which states have the greatest impact on the probability of a steady mode. The work has considered fractality of arrivals and its range in the queueing system with priorities
A supersonic laser ablation beam source with narrow velocity spreads
A supersonic beam source for SrF and BaF molecules is constructed by combining the expansion of carrier gas (a mixture of 2% SF6 and 98% argon) from an Even-Lavie valve with laser ablation of a barium/strontium metal target at a repetition rate of 10 Hz. Molecular beams with a narrow translational velocity spread are produced at relative values of Δv/v = 0.053(11) and 0.054(9) for SrF and BaF, respectively. The relative velocity spread of the beams produced in our source is lower in comparison with the results from other metal fluoride beams produced in supersonic laser ablation sources. The rotational temperature of BaF is measured to be 3.5 K. The source produces 6 × 108 and 107 molecules per steradian per pulse in the X2ς+ (ν = 0, N = 1) state of BaF and SrF molecules, respectively, a state amenable to Stark deceleration and laser cooling