10 research outputs found
First results on Ge resonant laser photoionization in hollow cathode lamp
In the framework of the research and development activities of the SPES project regarding the
optimization of the radioactive beam production, a dedicated experimental study has been recently
started in order to investigate the possibility of in-source ionization of germanium using a set of
tunable dye lasers. Germanium is one of the beams to be accelerated by the SPES ISOL facility, which
is under construction at Legnaro INFN Laboratories. The three-step, two color ionization schemes
have been tested using a Ge hollow cathode lamp. The slow and the fast optogalvanic signals were
detected and averaged by an oscilloscope as a proof of the laser ionization inside the lamp. As a
result, several wavelength scans across the resonances of ionization schemes were collected with the
fast optogalvanic signal. Some comparisons of ionization e
ffi
ciency for di
ff
erent ionization schemes
were made. Furthermore, saturation curves of the first excitation transitions have been obtained. This
investigation method and the setup built in the laser laboratory of the SPES project can be applied
for the photo-ionization scheme studies also for the other possible radioactive element
First results on Ge resonant laser photoionization in hollow cathode lamp
In the framework of the research and development activities of the SPES project regarding the optimization of the radioactive beam production, a dedicated experimental study has been recently started in order to investigate the possibility of in-source ionization of germanium using a set of tunable dye lasers. Germanium is one of the beams to be accelerated by the SPES ISOL facility, which is under construction at Legnaro INFN Laboratories. The three-step, two color ionization schemes have been tested using a Ge hollow cathode lamp. The slow and the fast optogalvanic signals were detected and averaged by an oscilloscope as a proof of the laser ionization inside the lamp. As a result, several wavelength scans across the resonances of ionization schemes were collected with the fast optogalvanic signal. Some comparisons of ionization efficiency for different ionization schemes were made. Furthermore, saturation curves of the first excitation transitions have been obtained. This investigation method and the setup built in the laser laboratory of the SPES project can be applied for the photo-ionization scheme studies also for the other possible radioactive elements. (C) 2015 AIP Publishing LLC
In-source laser spectroscopy of dysprosium isotopes at the ISOLDE-RILIS
A number of radiogenically produced dysprosium isotopes have been studied by in-source laser spectroscopy at ISOLDE using the Resonance Ionization Laser Ion Source (RILIS). Isotope shifts were measured relative to Dy in the 4 f6s I (gs) 4 f6s6p (8,1) (418.8 nm) resonance transition. The electronic factor, F, and mass shift factor, M, were extracted and used for determining the changes in mean-squared charge radii for Dy and Dy for the ïŹrst time.A number of radiogenically produced dysprosium isotopes have been studied by in-source laser spectroscopy at ISOLDE using the Resonance Ionization Laser Ion Source (RILIS). Isotope shifts were measured relative to Dy in the 46 I (gs)â 466(8,1) (418.8nm) resonance transition. The electronic factor, , and mass shift factor, , were extracted and used for determining the changes in mean-squared charge radii for Dy and Dy for the first time
In-source laser photoionization spectroscopy of Bi isotopes:accuracy of the technique and methods of data analysis
The in-source laser photoionization spectroscopy was applied to study neutron-deficient Bi isotopes. Data analysis and accuracy-related aspects of this technique are discussed. The accuracy of the peak position evaluation is estimated. An âintegration methodâ for nuclear spin determination in the case of partially resolved hyperfine spectra is discussed in detail.</p
In-source laser photoionization spectroscopy of Bi isotopes: accuracy of the technique and methods of data analysis
The in-source laser photoionization spectroscopy was applied to study neutron-deficient Bi isotopes. Data analysis and accuracy-related aspects of this technique are discussed. The accuracy of the peak position evaluation is estimated. An âintegration methodâ for nuclear spin determination in the case of partially resolved hyperfine spectra is discussed in detail