(Spectroscopic and dynamical studies of highly energized small polyatomic molecules)

Technical Report · Mon Jan 01 04:00:00 EST 1990

DOI:https://doi.org/10.2172/5094578· OSTI ID:5094578

We have developed a new procedure to detect acetylene-vinylidene isomerization in stimulated emission pumping (SEP) spectra which we call spectral cross-correlation (SCC). SEP is used to access two disjoint sets of highly excited acetylene vibrational levels at an energy near the suspected isomerization threshold energy. In Part 2, we discuss a novel method for measuring the C-H bond energy in acetylene, Zeeman anti-crossing spectroscopy (ZAC) in which a magnetic field is used to tune a predissociated, optically inaccessible triplet level into resonance with an optically accessible singlet level. Parts 3 and 4 discuss Large Amplitude Motion in Acetylene'' and Excited Electronic States of Acetylene'' respectively. (JDL)

• Research Organization: Massachusetts Inst. of Tech., Cambridge, MA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: FG02-87ER13671
• OSTI ID: 5094578
• Report Number(s): DOE/ER/13671-3; ON: DE90006049
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400201 -- Chemical & Physicochemical Properties
ACETYLENE
ALKYNES
CHEMICAL BONDS
CHEMICAL REACTIONS
DISSOCIATION
DOCUMENT TYPES
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXCITED STATES
HYDROCARBONS
ISOMERIZATION
ORGANIC COMPOUNDS
PROGRESS REPORT
RADICALS
SPECTROSCOPY
VIBRATIONAL STATES
VINYLIDENE RADICALS