Positron-molecule annihilation by capture into vibrational Feshbach resonances of infrared-active modes

Details Positron-molecule annihilation by capture into vibrational Feshbach resonances of infrared-active modes Positron-molecule annihilation by capture into vibrational Feshbach resonances of infrared-active modes

2006-08-29

arxiv.org/abs/physics/0608286v1

Phys. Rev. Lett. 97, 193201 (2006)

Physics

Atomic Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.97.193201

Enhanced positron annihilation on polyatomic molecules is a long-standing and complex problem. We report the results of calculations of resonant positron annihilation on methyl halides. A free parameter of our theory is the positron binding energy. A comparison with energy-resolved annihilation rates measured for CH$_3$F, CH$_3$Cl, CH$_3$Br [Barnes et al. Phys. Rev. A {\bf 74}, 012706 (2006)] shows good agreement and yields estimates of the binding energies.

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