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An aperture placed in the beam to restrict the divergence to the maximum compatible with the selected resolution. When choosing lower resolution you can improve the S/N by opening the stop. Note that in many instances there is no physically separate stop but there will be some aperture, be it the source size, or the detector active area, that acts as the system J stop.

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Ordklasse: noun
Synonym(er): j_stop
Blossary:
Fagområde/Domene Chemistry
Category: Spectroscopy
Company: Newport
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