laser Raman microanalysis (LRMA)
Any technique in which a specimen is bombarded with a finely focused @L03459@ beam (diameter less than \(10\ \unicode[Times]{x3BC}\text{m}\)) in the @UT07492@ or @VT07496@ range and the intensity versus @W06659@ function of the Raman radiation is recorded yielding information about vibrational states of the excited substance and therefore also about functional groups and chemical bonding.
Orange Book, 2nd ed., p. 249 [Terms] [Book]