首页|Odd-parity Rydberg and autoionizing states of thulium studied by laser resonance ionization spectroscopy
Odd-parity Rydberg and autoionizing states of thulium studied by laser resonance ionization spectroscopy
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NSTL
Elsevier
Laser resonance ionization spectroscopy of atomic thulium (Tm) has been performed at TRIUMF's off-line laser ion source test stand with a system of pulsed titanium sapphire (Ti:Sa) lasers. Automated continuous laser frequency scans across Rydberg states and autoionizing (AI) states were carried out using a pulsed, frequency doubled grating-tuned Ti:Sa laser. A combined analysis of the convergence limits resulting from odd-parity Rydberg series and AI Rydberg series improved the value for the ionization potential to 49,880.57(6)stat(4)sys cm-1, one order of magnitude more precise than the currently accepted value of 49,879.8(5) cm-1. An efficient resonance ionization scheme has been deduced from the photoionization spectra, and applied to online radioactive Tm isotope beam delivery at ISAC-TRIUMF. The ionization scheme will be useful for the extraction of Tm isotopes for nuclear medicine. The production yields of 153-165Tm were measured by evaluating the characteristic gamma lines of the Tm isotopes at the ISAC yield station.
ThuliumLaser resonance ionizationResonance ionization laser ion sourceTiSa laserRydberg stateAutoionizing stateIonization potentialIonization energy
NSTL
Elsevier
