Raman Spectroscopy is a spectroscopic technique in condensed matter physics and chemistry. It studies vibrational, rotational & low-frequency modes in systems.

I don't think it is. Microwave energy levels correspond to rotational modes, and for rotational spectroscopy, a molecule has to have a dipole moment... homonuclear diatomics like Br2 don't, and thus do not exhibit a pure rotational spectrum.

no,it is reflection spectroscopy

I can't think of anything that could be those two and nothing but those two. Electronic structure spectroscopy is generally in the UV/Visible band, but I suppose it could extend down into the near IR. Vibrational spectroscopy (with rotational fine structure) is in the IR, but doesn't make it up into the visible region.

James P. Reilly has written:

'Free radical and overtone spectroscopy' -- subject(s): Photoacoustic spectroscopy, Rotational spectra, Spectral bands, Vibrational spectra

'Ockham bibliography, 1950-1967' -- subject(s): Bibliography

'Saint Thomas on law' -- subject(s): Natural law