Secondary neutral mass spectrometry using three-color resonance ionization: Os detection at the ppb level and Fe detection in Si at the 40 ppt level
Conference
·
OSTI ID:7140872
- Argonne National Lab., IL (USA)
- California Inst. of Tech., Pasadena, CA (USA)
Among the many uses of resonantly enhanced multiphoton ionization (REMPI) spectroscopy, secondary neutral mass spectrometry (SNMS) is both one of the most demanding and one of the most important. Recently, we have demonstrated that the selectivity of REMPI, and thus the sensitivity of SNMS, can be greatly enhanced using resonant excitation schemes involving multiply resonant processes. Of particular interest, is the use of autoionizing resonances, resonances with energies in excess of the ionization potential of the atom, in the REMPI process. The use of autoionizing resonances can reduce the laser intensity required to saturate the ionization process by more than an order of magnitude. This reduction can strongly reduce nonresonant ionization of background substituents enhancing the signal to noise of the SNMS measurement. While this approach to laser ionization SNMS is generally applicable, the three-color ionization method has been demonstrated using two widely disparate yet important systems. 42 refs., 8 figs.
- Research Organization:
- Argonne National Lab., IL (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7140872
- Report Number(s):
- CONF-9005198-1; ON: DE90011167
- Country of Publication:
- United States
- Language:
- English
Similar Records
Secondary neutral mass spectrometry using three-color resonance ionization: Osmium detection at the p. p. b. level and iron detection in silicon at the lt 200 p. p. t. level
Two-color studies of autoionizing states of small molecules
Two-color studies of autoionizing states in small molecules
Journal Article
·
Sun Dec 31 23:00:00 EST 1989
· Philosophical Transactions of the Royal Society of London. Series A, Physical Sciences and Engineering; (United Kingdom)
·
OSTI ID:7039106
Two-color studies of autoionizing states of small molecules
Conference
·
Fri Mar 31 23:00:00 EST 1989
·
OSTI ID:6191346
Two-color studies of autoionizing states in small molecules
Conference
·
Fri Oct 20 00:00:00 EDT 1989
· AIP Conference Proceedings (American Institute of Physics); (USA)
·
OSTI ID:6996858
Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DYNAMIC MASS SPECTROMETERS
ELEMENTS
ION SOURCES
IONIZATION
IRON
LASERS
MASS SPECTROMETERS
MASS SPECTROSCOPY
MEASURING INSTRUMENTS
METALS
MULTI-PHOTON PROCESSES
OSMIUM
PHOTOIONIZATION
PLATINUM METALS
RHENIUM
SEMIMETALS
SILICON
SPECTROMETERS
SPECTROSCOPY
TIME-OF-FLIGHT MASS SPECTROMETERS
TIME-OF-FLIGHT SPECTROMETERS
TRANSITION ELEMENTS
400105* -- Separation Procedures
440800 -- Miscellaneous Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DYNAMIC MASS SPECTROMETERS
ELEMENTS
ION SOURCES
IONIZATION
IRON
LASERS
MASS SPECTROMETERS
MASS SPECTROSCOPY
MEASURING INSTRUMENTS
METALS
MULTI-PHOTON PROCESSES
OSMIUM
PHOTOIONIZATION
PLATINUM METALS
RHENIUM
SEMIMETALS
SILICON
SPECTROMETERS
SPECTROSCOPY
TIME-OF-FLIGHT MASS SPECTROMETERS
TIME-OF-FLIGHT SPECTROMETERS
TRANSITION ELEMENTS