light which is scattered has different energy from incident ray
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How is a spectra formed?
the difference in energy between the incident ray and the scattered light forms the basis for the spectra
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Process
sample irradiated with monochromatic light, the inelastically scattered light is collected and converted into a spectra
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Which part of the spectra is formed by inelastically scattered light
RHS
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the first peak on the LHS ....
is produced by elastically scattered light, and we ignore this
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Elastically scattered light
has no energy change, and is aka Raleigh scattering
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Process of inelastical scattereing
IR from source hits sample, set amount of energy is absorbed to set the molecule into a mode of vibration - meaning there is an energy change when it bounces back
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Main use of raman spec
for producing fingerprint
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Difference between IR spec and R.spec
IR spec - IR passes thru sample . RS - IR bounces back off sample . RS produces much more detailed peaks
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advantages of RS
minimal sample prep. Rich in info. Aq samples can be used
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