Photoconductivity of additively-coloured alkali halide crystals

Guha, S.

doi:10.1088/0022-3727/1/12/304

Cited by 2 publications

(1 citation statement)

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“…As pointed out by, amongst others, Shukla and Mamun [7], in addition to the interstellar space, there are many situations in near space, planets, interplanetary medium, solar corona, comets, etc, where photoelectric emission from dust particles is the dominant process for electron generation. Photoelectric charging of dust (or colloidal particles) in gases [8] and alkali halide crystals [9], with colloidal particles of alkali metals are also significant areas of application. However, the theories have been based on the assumption that all the particles carry the same charge and that the temperature of the electrons and the dust particles is the same.…”

Section: Introductionmentioning

confidence: 99%

Charge distribution of particles in an irradiated dust cloud

Sodha¹,

Dixit²,

Srivastava

et al. 2009

Plasma Sources Sci. Technol.

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This communication is a discussion on the charge distribution of the dust particles in an illuminated dust cloud in near space when the photoelectric emission is the dominant mechanism for electron generation. An analytical model has been developed on the basis of charge neutrality condition and balance of number density and energy of electrons; the approach of statistical mechanics has been followed. Computations correspond to a metallic dust cloud in near space environment, where Lyman-α spectral line radiation is the dominant one for photoelectric emission. A comparison of results from the present statistical theory of charge distribution with the uniform charge theory has been presented. As an interesting conclusion, the theory predicts negative charging of a few dust particles for a certain range of parameters leading to the formation of bigger particles on account of electrostatic attraction between oppositely charged particles.

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Section: Introductionmentioning

confidence: 99%