CERM joins the Magnetic Resonance Community in the mourning for the loss of Nicolaas Bloembergen.

Among his many fundamental contributions to Physics we like to recall his pioneering insights into the theory of electron and nuclear relaxation, which, soon after the Second World War, started a whole new area of research and has been - and still is - inspiring for us CERMians over many decades.

Among his seminal papers are the milestone work with Purcell and Pound on paramagnetic relaxation:
N. Bloembergen, E. M. Purcell, and R. V. Pound, Relaxation effects in Nuclear Magnetic Resonance Absorption, Phys. Rev., 73, 679 (1948);

the treatment of Fermi contact:
I. Solomon and N. Bloembergen, Nuclear Magnetic Interactions in the HF Molecule, J. Chem. Phys., 25, 261 (1956),
developed together with Solomon, who had derived the treatment of dipole-dipole relaxation the year before;

his work on nuclear relaxation in paramagnetic solutions:
N. Bloembergen, Proton Relaxation Times in Paramagnetic Solutions, J. Chem. Phys., 27, 572 (1957),

and the theory of field-dependent electron relaxation:
N. Bloembergen and L. O. Morgan, Proton Relaxation Times in Paramagnetic Solutions. Effects of Electron Spin Relaxation, J. Chem. Phys., 34, 842 (1961).

All this body of work is universally known as the Solomon-Bloembergen-Morgan (SBM) model.