Abstract
The dynamical behaviour of a hot exciton system is studied by measuring the time evolution of secondary emission after picosecond laser excitation in resonance with the indirect exciton. From analyzing the experimental data absolute transition rates are determined for exciton trapping at impurities or defects and scattering by LA(Λ) and TA(X) phonons. The deformation potentials for long wavelength acoustic and intervalley phonon scattering derived are 0.84 eV and 4.2 eV, respectively.
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