Présidents de session
Spectroscopy of heavy and superheavy elements
- Iain Moore (University of Jyväskylä)
Spectroscopy of heavy and superheavy elements
- Hervé Savajols (GANIL/CNRS)
Exploiting closed-path ion trajectories in an electrostatic ion trap, the multi-reflection time-of-flight mass spectrograph (MRTOF-MS) [1] is one of the most promising techniques for precise mass measurements of short-lived isotopes. Exotic ions produced at radioisotope facilities are stored in an electrostatic trap at kinetic energies on the order of a few keV, reflected back and forth...
The existence and stability of heavy nuclei is a forefront topic in physics. Modern laser spectroscopy techniques provide a unique tool to study nuclear shell effects by measuring isotope shifts to infer mean-square charge radii and hence deduce nuclear size and shape. Laser spectroscopy measurements of the isotope shift of an atomic transition of the actinide element fermium (Z=100) have been...
The Super Separator Spectrometer-Low Energy Branch (S$^3$-LEB) is a low-energy radioactive ion beam experiment under commissioning as part of the GANIL-SPIRAL2 facility [1-3]. It will be used for the production and study of exotic nuclei by in-gas laser ionization and spectroscopy (IGLIS), decay spectroscopy, and mass spectrometry.
Development work has been ongoing at the S$^3$-LEB setup...
Optical spectroscopy of superheavy elements is an experimental challenge. The production yields of the elements are about one atom per second or even less, the half-lives are extremely short, and the atomic structure is uncharted experimental territory. Conventional spectroscopy techniques based on fluorescence detection are no longer suitable because they lack the sensitivity required to...
The study of the structure of neutron-deficient actinides is of particular interest since several theoretical calculations predict strong octupole deformations in this region of the nuclear chart [1, 2, 3]. However experimental data are scarce due to very low production rates.
There is an ongoing program at the IGISOL (Ion Guide Isotope Separation On-Line) facility, University of Jyväskylä,...
The superconducting LINAC (LINear ACcelerator) of SPIRAL2-GANIL will deliver very intense heavy-ion beams up to uranium by virtue of the additional NEWGAIN (NEW GAnil Injector) with mass to charge ratio (A/Q = 7)[1]. The S$^3$ (Super Separator Spectrometer) of SPIRAL2 was designed to have high transmission, high beam rejection and high mass resolving power capabilities to study rare isotopes...
The mutli-reflection time-of-flight mass spectrograph (MRTOF-MS) has proven to be a valuable tool for online atomic mass measurements. We have shown it to be capable of approaching $R_m$=10$^6$ with measurements times $t<20$ ms, allowing high-precision determinations of the masses of even very short-lived species. The MRTOF-MS has been shown to be a particularly powerful tool for online...
