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We study the motion of electron-hole drops in pure Ge at 2^∘{}K. An analysis of their luminescence by a time- and space-resolved technique yields their diffusion coefficient (150 cm² / sec) and their lifetime (40 {μ}sec). We also measure the formation time (0.1-0.7 {μ}sec) of drops containing about 10⁶ electron-hole pairs. A discussion of these new results is given.
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Guillaume et al. (1971) studied this question.
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