Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Michigan, Ann Arbor, MI (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States); Johannes Gutenberg Univ., Mainz (Germany)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Three-step resonance photoionization spectra of plutonium have been studied with Ti:Sapphire lasers for the development of efficient laser ionization schemes for ultra-trace analysis of Pu isotopes by resonance ionization mass spectrometry. We observed eighteen intermediate excited states of even parity in the energy range 35568–36701 cm-1, thirteen of them have not been previously documented, and a larger number of high-lying excited states and autoionizing states of odd-parity between 48238 and 49510 cm-1. Three-color, three-photon ionization schemes via six intermediate states were evaluated under similar ion source operating conditions. This led to a highly efficient three-step scheme with an overall ionization efficiency of 51.1±1.3%, which is an order of magnitude improvement over the previously reported ionization efficiency for Pu.
@article{osti_1836460,
author = {Galindo-Uribarri, Alfredo and Liu, Yuan and Romero, E. and Stracener, Dan},
title = {High efficiency laser resonance ionization of plutonium},
annote = {Three-step resonance photoionization spectra of plutonium have been studied with Ti:Sapphire lasers for the development of efficient laser ionization schemes for ultra-trace analysis of Pu isotopes by resonance ionization mass spectrometry. We observed eighteen intermediate excited states of even parity in the energy range 35568–36701 cm-1, thirteen of them have not been previously documented, and a larger number of high-lying excited states and autoionizing states of odd-parity between 48238 and 49510 cm-1. Three-color, three-photon ionization schemes via six intermediate states were evaluated under similar ion source operating conditions. This led to a highly efficient three-step scheme with an overall ionization efficiency of 51.1±1.3%, which is an order of magnitude improvement over the previously reported ionization efficiency for Pu.},
doi = {10.1038/s41598-021-01886-z},
url = {https://www.osti.gov/biblio/1836460},
journal = {Scientific Reports},
issn = {ISSN 2045-2322},
number = {1},
volume = {11},
place = {United States},
publisher = {Nature Publishing Group},
year = {2021},
month = {12}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 281, Issue 3https://doi.org/10.1016/0168-9002(89)91489-7
The ninth international symposium on resonance ionization spectroscopy:New directions and applications, AIP Conference Proceedingshttps://doi.org/10.1063/1.57161