Physics – Atomic Physics
Scientific paper
Feb 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ucsd.rept.....s&link_type=abstract
Final Technical Report, 1 Oct. 1989 - 31 Dec. 1993 California Univ., San Diego, La Jolla. Dept. of Physics.
Physics
Atomic Physics
Elementary Particle Interactions, Molecules, Positron Annihilation, Positrons, Atomic Physics, Fluorine Compounds, Gamma Ray Astronomy, Gamma Ray Spectra, Hydrocarbons, Ionization Potentials, Mass Spectroscopy
Scientific paper
The objective of this research was to study the interaction of positrons with molecules at energies below the threshold for positronium atom formation. While there is evidence that positrons bind or form long-lived resonances with large atoms and molecules, this phenomenon is not understood. This phenomenon has a number of potentially important scientific and technological applications, including aspects of atomic and molecular physics, the formation of positive ions for mass spectrometry, and gamma ray astronomy. Many facets of the interaction of low energy positrons with molecules were illuminated, including the scaling of positron annihilation rate with molecular ionization potential and the identification of other trends as a function of chemical structure. Spectra of the gamma ray radiation resulting when a positron annihilates on a molecule were also measured. The measurements indicate that the site of positron binding is on the C-H bond in hydrocarbon molecules and on the fluorine atoms in fluorine compounds. The measured annihilation rates on large aromatics indicate that these molecules are likely to be an important source of the annihilation radiation observed from the interstellar medium.
No associations
LandOfFree
Positron-molecule interactions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Positron-molecule interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positron-molecule interactions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-957373