  Observation of possible stimulated emission of Mossbauer gamma is reported by
liquid-nitrogen quenching of rhodium sample from room temperature to 77K in the
time-resolved Mossbauer spectroscopy. Recently, we have demonstrated the
anomalous emission of three entangled gammas of the E3 Mossbauer transition
generated by bremsstrahlung irradiation. In this work, we further report the
high-speed decay of excited state. We conjecture that cooling shrinkage,
gravitational redshift and crystal lattice collimate entangled gammas in a
linear cavity. This opens up a new approach towards gamma lasing, if the
stimulated emission occurs at this obtained low excitation density.
