Nuclear recoil chemical activation studies. Vibrational energy transfer from cyclobutane-t

Journal Article · Fri Apr 15 04:00:00 EST 1977 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.434396· OSTI ID:7224661

Nogar, N S; Spicer, L D

A method is demonstrated for the determination of intermolecular energy transfer efficiencies in systems chemically activated by nuclear recoil reaction. Relative vibrational energy transfer efficiencies are determined for highly excited cyclobutane-t formed with approx.5 eV of internal energy in the hot tritium for hydrogen replacement reaction on cyclobutane in the presence of several inert bath gases. The pressure dependence of the hot yields is used to probe the overall reaction mechanism and results indicate that a sizable fraction of the hot reaction product does not undergo competitive unimolecular decomposition. The general systematics of these side reactions are discussed. From the composition dependence of the unimolecular reaction at a constant pressure of 800 torr, the relative energy transfer efficiencies for the respective bath gases are found to be c-C/sub 4/H/sub 8/, 1.0; CF/sub 4/, 1.05; N/sub 2/, 0.32; He, 0.12; Ne, 0.24; Ar, 0.25; Kr, 0.31; Xe, 0.39. Simple collision models for the cyclobutane--noble gas cases suggest V--T transfer occurs most efficiently through delocalized interactions. Furthermore, angular momentum considerations indicate low impact parameter collisions are most effective in forming transition modes through which statistical redistribution of energy can occur.

• Research Organization: Department of Chemistry, University of Utah, Salt Lake City, Utah 84112
• OSTI ID: 7224661
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 66:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400701* -- Radiochemistry & Nuclear Chemistry-- Hot-Atom Chemistry
ALKANES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CHEMICAL ACTIVATION
CHEMISTRY
CYCLOALKANES
ENERGY LEVELS
ENERGY TRANSFER
EXCITED STATES
HOT ATOM CHEMISTRY
HYDROCARBONS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
RADIOCHEMISTRY
RADIOISOTOPES
RECOILS
TRITIUM
VIBRATIONAL STATES
YEARS LIVING RADIOISOTOPES