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We report the first isolation of individual Raman optical activity (ROA) invariants. In the far-from-resonance approximation, where ROA intensity is comprised of three invariants, a specific procedure for isolating all three invariants is proposed. For depolarized right-angle incident or scattered circular polarization (ICP or SCP) and backscattering in-phase dual circular polarization (DCPI) ROA only two invariants contribute, the anisotropic magnetic-dipole and the electric-quadrupole optical-activity tensor invariants. These two invariants are isolated experimentally for (+)-trans-pinane and (−)-α-pinene.
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Che et al. (1992) studied this question.
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