Accession Number : ADA323253

Title :   Spectroscopic and Kinetic Studies of Bismuth Dimers.

Descriptive Note : Doctoral thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Franklin, Robert E.

PDF Url : ADA323253

Report Date : FEB 1997

Pagination or Media Count : 201

Abstract : The spectroscopy of high rotational levels (J <= 211) in Bi2 X(Og(+)) and A(Ou(+)) was investigated for 2<=v"<=5 and 0<=v'<=4 by observing total fluorescence from laser excitation. Dunham coefficients were derived that fit all observed rotational lines to within 0.01 /cm. Franck-Condon factors were calculated and experimentally verified for transitions originating from the initially populated levels 0<=v'<=5. Vibrational energy transfer upon collision with rare gas collision partners was investigated for the low-lying vibrational levels of the A-state using spectrally resolved, continuous wave laser induced fluorescence. Vibrational transfer was adequately modeled by Landau-Teller scaling of the deltav=-1 vibrational transfer rates with fundamental rate coefficients ranging from kv=5.29x10(exp -12) cu cm/molec-sec for collisions with helium to 2.38x10(exp -12) cu cm/molec-sec for krypton. Electronic quenching and multi-quantum transfer rates were approximately an order of magnitude slower than single quantum transfer rates.

Descriptors :   *SPECTROSCOPY, *KINETIC ENERGY, *DIMERS, *BISMUTH, FLUORESCENCE, MOLECULAR VIBRATION, EXCITATION, QUANTUM THEORY, THESES, ENERGY TRANSFER, HELIUM, MOLECULAR ROTATION, ARGON, NEON, PARTICLE COLLISIONS, ATOMIC ENERGY LEVELS, KRYPTON.

Subject Categories : Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE