Progress in zirconium resonance ionization spectroscopy

Conference · Tue Dec 29 04:00:00 EST 1992

OSTI ID:6856765

Page, R H; Dropinski, S C; Worden, Jr, E F; Stockdale, J A.D.

We have examined the stepwise-resonant free-photon-ionization spectrum of neutral zirconium atoms using three separately-tunable pulsed visible dye lasers. The ground-level (first-step) transitions were chosen on the basis of demonstrated [sup 91]Zr selectivity. Lifetimes of even-parity levels around 36000 cm[sup [minus]1], measured with the delayed-photoionization technique, range from 10 to 100 ns. Direct ionization cross sections appear to be less than 10[sup [minus]17] cm[sup 2]; newly-detected autoionizing levels give peak ionization cross sections (inferred from saturation fluences) up to 10[sup [minus]15] cm[sup 2]. Portions of Rydberg series converging to the 315 and 763 cm[sup [minus]1] levels of Zr[sup +] were identified. Clumps'' of autoionizing levels are thought to be due to Rydberg-valence mixing.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6856765
• Report Number(s): UCRL-JC-112518; CONF-930159--25; ON: DE93011881
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPE SEPARATION
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STABLE ISOTOPES
ZIRCONIUM 91
ZIRCONIUM ISOTOPES