Inelastic Scattering with Ultraviolet Radiation

Inelastic Scattering with Ultraviolet Radiation (IUVS) beamline at Elettra Sincrotrone Trieste

The IUVS beamline is dedicated to the study of inelastic scattering with ultraviolet radiation, in a time-space domain not accessible at present by other facilities. In the inelastic scattering process, an incident photon, with energy Ei and momentum Ki interacts with the matter. In this interaction the photons can be diffused, with energy Es and momentum Ks. Here q=Ks-Ki is called “exchanged moment” and is of considerable importance in the study of inelastic diffusion. We refer to “inelastic scattering” when there is an energy variation. The peculiarity of IUVS is the specific kinematic region that can be investigated. IUVS beamline delivers photons with incident energy between 5 and 11 eV.  The incident photons that are inelastically diffused by the sample can be analysed by exploiting the two different and complementary experimental set-up available on the beamline, i.e. UV Brillouin and UV Resonant Raman scattering instruments, in order to probe both the acoustic and optical phonons propagating in the system. This allows to acquire information about the structure and dynamics of the constituent matter over different length scales through the analysis of its collective and molecular vibrations.

Technical specifications

UV Brillouin

The almost-backscattering configuration of Brillouin setup, with scattering angle theta of 178 degree, allows an exchanged momentum range of 2*10-2-2*10-1nm-1, corresponding to 10-1000 µeV scattered energy. Therefore it can investigate a S(q,ω) kinematic region not accessible at present by other experimental techniques as Brillouin scattering with visible light, X-Ray scattering and neutron scattering.

UV Resonant Raman scattering

The more recently realized experimental setup that enables to perform UV Resonant Raman spectroscopy using synchrotron radiation in the range of wavelengths 200-270 nm provides a fine tunable source in the deep-UV for mapping a wide resonance landscape range in different samples, from nanostructures and strongly correlated materials to biophysical and biochemical systems.

For more detailed information visit the beamline’s main homepage

Information for users

We invite users and collabrators to discuss thier proposals with the beamline local contacts well in advance before the submission deadline. This is crucial for a careful assesment of the experiment feasibility and may lead to improvements in the proposed experimental plan. In a restricted number of cases, when doubts arise about the suitability of your samples (sample absorption etc), it may be possible for you to arrange a test. Our website provides a wealth of informaiton on experiment feasibilty and proposal submission.


Claudio Masciovecchio
Tel: +39 040 375 8093 (office) | +39 040 375 8516 (beamline)

Barbara Rossi
Tel: +39 040 375 8042 (office) | +39 040 375 8516 (beamline)

Francesco D’Amico
Tel: +39 040 375 8837 (office) | +39 040 375 8516 (beamline)

This instrument is also available for single instrument proposals in offline mode (with conventional light sources)