3 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
Pulse-height defect in single-crystal CVD diamond detectors
International audienceThe pulse-height versus deposited energy response of a single-crystal chemical vapor deposition (scCVD) diamond detector was measured for ions of Ti, Cu, Nb, Ag, Xe, Au, and of fission fragments of Cf at different energies. For the fission fragments, data were also measured at different electric field strengths of the detector. Heavy ions have a significant pulse-height defect in CVD diamond material, which increases with increasing energy of the ions. It also depends on the electrical field strength applied at the detector. The measured pulse-height defects were explained in the framework of recombination models. Calibration methods known from silicon detectors were modified and applied. A comparison with data for the pulse-height defect in silicon detectors was performed