12 research outputs found
Hyperfine splitting and isotope shift in the atomic line of Na and the quadrupole moment of Na
The hyperfine structure of the optical line in Na and
Na has been investigated using high resolution laser spectroscopy
of a well-collimated atomic beam. The hyperfine splitting constants
and for the excited
level for both investigated sodium
isotopes have been obtained. They are as follows: MHz,
MHz, MHz, MHz.
With this data, using the high precision MCHF calculations for the
electric field gradient at the nucleus, the electric quadrupole moment
of Na has been deduced: b. The sign of ,
determined for the first time, indicates a prolate nuclear
deformation. A precise value of the isotope shift Na in the line
has also been obtained
First results from laser spectroscopy on bunched radioactive beams from the JYFL ion-beam cooler
A new RFQ ion-beam cooler and buncher, installed after the mass-separating
magnet of the ion guide isotope separator, IGISOL, JYFL, has dramatically
increased the scope of on-line laser spectroscopy at this facility.
The device, operated in a bunching mode, has permitted new measurements
on short-lived radionuclei in the Ti, Zr and Hf chains at a sensitivity
two orders of magnitude greater than that previously achieved. The device
has also opened new prospects for laser-based nuclear spectroscopy
at the facility, particularly collinear resonance ionisation spectroscopy