Efficient mass-selective three-photon ionization of zirconium atoms

Patent · Tue Dec 27 04:00:00 EST 1994

OSTI ID:6893271

Page, R H

In an AVLIS process, [sup 91]Zr is selectively removed from natural zirconium by a three-step photoionization wherein Zr atoms are irradiated by a laser beam having a wavelength [lambda][sub 1], selectively raising [sup 91]Zr atoms to an odd-parity E[sub 1] energy level in the range of 16000--19000 cm[sup [minus]1], are irradiated by a laser beam having a wavelength [lambda][sub 2] to raise the atoms from an E[sub l] level to an even-parity E[sub 2] energy level in the range of 35000--37000 cm[sup [minus]1] and are irradiated by a laser beam having a wavelength [lambda][sub 3] to cause a resonant transition of atoms from an E[sub 2] level to an autoionizing level above 53506 cm[sup [minus]1][lambda][sub 3] wavelengths of 5607, 6511 or 5756 [angstrom] will excite a zirconium atom from an E[sub 2] energy state of 36344 cm[sup [minus]1] to an autoionizing level; a [lambda][sub 3] wavelength of 5666 [angstrom] will cause an autoionizing transition from an E[sub 2] level of 36068 cm[sup [minus]1]; and a [lambda][sub 3] wavelength of 5662 [angstrom] will cause an ionizing resonance of an atom at an E[sub 2] level of 35904 cm[sup [minus]1]. 4 figures.

• DOE Contract Number: W-7405-ENG-48
• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): A; US 5376246
• Application Number: PPN: US 7-984170
• OSTI ID: 6893271
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
070100* -- Physical Isotope Separation
AUTOIONIZATION
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
EXCITATION
INTERMEDIATE MASS NUCLEI
IONIZATION
ISOTOPE SEPARATION
ISOTOPES
LASER ISOTOPE SEPARATION
LASER RADIATION
MULTI-PHOTON PROCESSES
NUCLEI
RADIATIONS
SEPARATION PROCESSES
STABLE ISOTOPES
ZIRCONIUM 91
ZIRCONIUM ISOTOPES