Smoothed neutron interaction

The strong interaction quanta, the gluons became extremely short ranged at around the temperature kT 100-200 MeV (a few times lO K). Computer-aided quantum field theoretical investigations have demonstrated that quarks and gluons are confined to the interior of nucleons (protons and neutrons) and excited baryonic resonances below this temperature range (Petreczky 2007). This transformation was smooth for baryonic matter... 

Here we show that the neutron reflectivity method combined with contrast variation allows us, in principle, to determine as precise as we wanted. Practically, however, the collimation imperfection reduces the resolution to a level which is unsatisfactory, but can be improved. Perhaps, the major interest in the method is conceptual.Using the onedimensional Schrodinger equation to predict the reflectivity, we have to consider the concentration profile as a smooth interaction potential. This point of view is fruitful,and we shall adopt it in this paper. 

---