Collision between magnetically trapped NH molecules in the (N=0,J=1) state

Elastic and inelastic collisions between NH molecules in the (N=0,J=1) state were analyzed. These analyses showed that the elastic collision is caused mainly by electric dipole-induced dipole interaction, and the inelastic collision is caused mainly by the magnetic dipole-dipole interaction. The collision cross sections obtained by the quantum and classical methods are roughly in good agreement in the kinetic-energy region of 5-500 mK. Moreover, the ratio of the inelastic-collision rate to the elastic-collision rate is lower than 1/200. These results show that the NH molecule is advantageous to perform evaporative cooling.