Abstract: A radiation detector may include an active structure having an input face and an output face for incident ionizing radiation. The active structure may include: a first organic scintillator including at least one neutron-absorbing material and enabling discrimination between fast neutrons, thermal neutrons, and photons; at least one second scintillator arranged in front of the first scintillator and capable of preferentially detecting the alpha and/or beta radiation, the two scintillators having, due to the choice of their constituents, different mean pulse decay constants, and the second scintillator having a thickness smaller than the first.

Abstract: A radiation detector may include an active structure having an input face and an output face for incident ionizing radiation. The active structure may include: a first organic scintillator including at least one neutron-absorbing material and enabling discrimination between fast neutrons, thermal neutrons, and photons; at least one second scintillator arranged in front of the first scintillator and capable of preferentially detecting the alpha and/or beta radiation, the two scintillators having, due to the choice of their constituents, different mean pulse decay constants, and the second scintillator having a thickness smaller than the first.

Abstract: The invention relates to a complex between block polymers comprising a first hydrophilic block and a second block comprising at least one ionised function, and optionally carrying at least one additional chemical or biochemical group or comprising a third polymer block, and mixtures of said polymers, and ions selected from the elements Cu, Ga, Sr, Bi, Se, Y, lanthanide, Pb, Te, Zn, Zr at different degrees of ionisation and the mixtures thereof, more particularly for the use thereof in medical imaging, and to a production method and a physiologically acceptable composition containing said complex.