OSU Navigation Bar

The Ohio State University University Libraries Knowledge Bank

The Knowledge Bank is scheduled for regular maintenance on Sunday, April 20th, 8:00 am to 12:00 pm EDT. During this time users will not be able to register, login, or submit content.

INVESTIGATION OF THE MECHANISM OF INTERSYSTEM CROSSING IN $S_{1}$ ACETYLENE

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/19489

Show full item record

Files Size Format View
1999-TG-11.jpg 131.1Kb JPEG image Thumbnail of INVESTIGATION OF THE MECHANISM OF INTERSYSTEM CROSSING IN $S_{1}$ ACETYLENE

Title: INVESTIGATION OF THE MECHANISM OF INTERSYSTEM CROSSING IN $S_{1}$ ACETYLENE
Creators: Altunata, Selen; Cunningham, Kevin L.; Drucker, Stephen; Field, R. W.
Issue Date: 1999
Abstract: The simultaneously recorded Surface Electron Ejection by Laser-Excited Metastables (SEELEM, abbreviated LEM) and Laser-Induced Fluorescence (LIF) spectra of $C_{2}H_{2}$ provide information about the manifold of triplet states near-degenerate with the first excited singlet electronic state of this molecule. SEELEM detects states with long lifetimes due to large fractional triplet character (and less than 0.01 singlet character), and LIF detects states with short lifetimes due to large fractional singlet character. Therefore, SEELEM and LiF in combination allow one to study the intersystem crossing in $C_{2}H_{2}$ from a mechanistic point of view. SEELEM and LIF spectra have been subjected to a statistical analysis technique that has been developed to extract both qualitative and quantitative information about the nature of the singlet $\sim$ triplet coupling in $S_{1}$ acetylene. The new statistical method eliminates the need for assignment and fitting of all observed eigenstates. The type of questions related to the mechanism of intersystem crossing in $C_{2}H_{2}$ that the analysis technique addresses will be outlined. We will propose several optimized statistical schemes for processing either LIF spectra alone or the LIF/LEM combination, which enable the first step toward mechanism beyond the standard model of a bright state interacting with a statistical bath of dark states.
URI: http://hdl.handle.net/1811/19489
Other Identifiers: 1999-TG-11
Bookmark and Share