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taramalı elektron mikroskobu

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TERMOİONİK TABANCALAR<br />

Sıcaklık arttıkça filamentten ayrılan <strong>elektron</strong>ların<br />

sayısı artar.<br />

J<br />

=<br />

AT<br />

2<br />

e<br />

Φ<br />

−<br />

kT<br />

J=Elektron akışı<br />

A=Malzeme sabiti<br />

T=Filament sıcaklığı<br />

Φ=Đş fonksiyonu<br />

k=Boltzman sabiti (1.38 x10 -23 J/K)<br />

Bahar 2009

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