Lecture26 - ENU 4612C/5615C Nuclear Radiation Detection and...

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ENU 4612C/5615C Nuclear Radiation Detection and Instrumentation Lecture 26 Semiconductor Detectors (5)
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Lithium – Drifted Detectors rays - X or electrons for needed not volume large - ion configurat Planar - ely continuous cooled Normally - py spectrosco ray - X and electron to ns applicatio restricts silicon of (14) value - Z Low - Si(Li) tion redistribu lithium prevent ely to continuous cooled be Must - HPGe by replaced largely Now - py spectrosco ray - for s 1960' early since Used - Ge(Li) γ
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Dopant Compensation atoms donor Li by matched exactly is impurity acceptor residual a in which , technique drifting ion the instead Use l impractica is material the of on compensati Bulk : region d compensate or intrinsic" " the achieve To
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The Lithium – Drifting Process ion concentrat Lithium impurity residual type - p with Ge or Si purity - High vapor Li : drifting Before : drifting After A N A N
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p-i-n Configuration region Intrinsic - drifted Lithium Bias Signal ion concentrat Lithium A N D N Layer n + Region Type p +
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n i p Density Charge Potential Electric Field Electric ρ ϕ ξ
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Lecture26 - ENU 4612C/5615C Nuclear Radiation Detection and...

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