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Title: Resonance ionization of titanium: high useful yield and new autoionizing states

Abstract

The isotopic composition of titanium in meteoritic phases can be used to decipher processes such as stellar nucleosynthesis and galactic chemical evolution. In order to facilitate analyses of trace amounts of titanium in atom-limited samples, here we established a new three-step resonance ionization scheme. The scheme was developed using titanium–sapphire lasers and we show that it can be easily saturated and that it yields stable isotope measurements. Using the LION (Laser Ionization Of Neutrals) instrument we demonstrate a useful yield of 10.1% ± 1.6% when ionizing from the ground state. We determined the population of two low-lying electronic states within the ground state multiplet and show that accessing all three levels of the ground state manifold would result in an overall useful yield of ~18%. The useful yield agrees well with expectations based on prior analyses of uranium using LION. In addition, we report the energy levels of nine new autoionizing states between 56 217 cm-1 and 57 086 cm-1.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). Nuclear and Chemical Sciences Division
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1489456
Alternate Identifier(s):
OSTI ID: 1471744
Report Number(s):
LLNL-JRNL-756574
Journal ID: ISSN 0267-9477; 943686
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Analytical Atomic Spectrometry
Additional Journal Information:
Journal Volume: 33; Journal Issue: 11; Journal ID: ISSN 0267-9477
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 47 OTHER INSTRUMENTATION

Citation Formats

Trappitsch, Reto, Savina, Michael R., and Isselhardt, Brett H. Resonance ionization of titanium: high useful yield and new autoionizing states. United States: N. p., 2018. Web. doi:10.1039/C8JA00269J.
Trappitsch, Reto, Savina, Michael R., & Isselhardt, Brett H. Resonance ionization of titanium: high useful yield and new autoionizing states. United States. doi:10.1039/C8JA00269J.
Trappitsch, Reto, Savina, Michael R., and Isselhardt, Brett H. Thu . "Resonance ionization of titanium: high useful yield and new autoionizing states". United States. doi:10.1039/C8JA00269J. https://www.osti.gov/servlets/purl/1489456.
@article{osti_1489456,
title = {Resonance ionization of titanium: high useful yield and new autoionizing states},
author = {Trappitsch, Reto and Savina, Michael R. and Isselhardt, Brett H.},
abstractNote = {The isotopic composition of titanium in meteoritic phases can be used to decipher processes such as stellar nucleosynthesis and galactic chemical evolution. In order to facilitate analyses of trace amounts of titanium in atom-limited samples, here we established a new three-step resonance ionization scheme. The scheme was developed using titanium–sapphire lasers and we show that it can be easily saturated and that it yields stable isotope measurements. Using the LION (Laser Ionization Of Neutrals) instrument we demonstrate a useful yield of 10.1% ± 1.6% when ionizing from the ground state. We determined the population of two low-lying electronic states within the ground state multiplet and show that accessing all three levels of the ground state manifold would result in an overall useful yield of ~18%. The useful yield agrees well with expectations based on prior analyses of uranium using LION. In addition, we report the energy levels of nine new autoionizing states between 56 217 cm-1 and 57 086 cm-1.},
doi = {10.1039/C8JA00269J},
journal = {Journal of Analytical Atomic Spectrometry},
number = 11,
volume = 33,
place = {United States},
year = {2018},
month = {9}
}

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