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In the present work we propose to study neutrino oscillations employingsources of monoenergetic neutrinos following electron capture by the nucleus.Since the neutrino energy is very low the smaller of the two oscillationlengths, L23, appearing in this electronic neutrino disappearance experimentcan be so small that the full oscillation can take place inside the detectorand one may determine very accurately the neutrino oscillation parameters.  Since in this case the oscillation probability is proportional to theta13,one can measure or set a better limit on the unknown parameter theta13. This isquite important, since, if this mixing angle vanishes, there is not going to beCP violation in the leptonic sector. The best way to detect it is by measuringelectron recoils in neutrino-electron scattering. One, however, has to pay theprice that the expected counting rates are very small. Thus one needs a veryintensive neutrino source and a large detector with as low as possible energythreshold and high energy and position resolution. Both spherical gaseous andcylindrical liquid detectors are studied. Different source candidates areconsidered.

Exploring new features of neutrino oscillations with very low energy monoenergetic neutrinos