Progress in zirconium resonance ionization spectroscopy

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

OSTI ID:10148663

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: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10148663
• Report Number(s): UCRL-JC--112518; CONF-930159--25; ON: DE93011881
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400202
663110
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY-LEVEL TRANSITIONS
GENERAL AND AVERAGE PROPERTIES OF NUCLEI AND NUCLEAR ENERGY LEVELS
ISOTOPE EFFECTS, ISOTOPE EXCHANGE, AND ISOTOPE SEPARATION
LASER ISOTOPE SEPARATION
PHYSICAL PROPERTIES
RESONANCE IONIZATION MASS SPECTROSCOPY
ZIRCONIUM 91