6533b7d8fe1ef96bd1269722

RESEARCH PRODUCT

Excited atomic energy levels in protactinium by resonance ionization spectroscopy

Dominik StuderP. NaubereitT. GottwaldKlaus Wendt

subject

PhysicsRange (particle radiation)010308 nuclear & particles physicsProtactiniumchemistry.chemical_element01 natural scienceschemistryExcited state0103 physical sciencesResonance ionizationDensity of statesAtomic physics010306 general physicsSpectroscopyEnergy (signal processing)Excitation

description

We present high-resolution data of the single-excitation spectrum of protactinium, reaching slightly beyond the first-ionization threshold. Within this work, more than 1500 energy levels are recorded in different excitation energy ranges below $50\phantom{\rule{0.16em}{0ex}}000\phantom{\rule{4pt}{0ex}}{\mathrm{cm}}^{\ensuremath{-}1}$. Our experimental results show that the tabulated data in the literature severely underestimate the density of states particularly regarding the highly excited spectral range.

https://doi.org/10.1103/physreva.98.022505