Do the solitary cooled-down neutron stars spontaneously disintegrate?

We discuss the possibility for a cooled down and otherwise stable solitary neutron star to make a spontaneous transition to its potential black hole ground state. This megascopic quantum decay would mimic a precursorless explosion in which the emitted radiations consisting predominantly of the statistical mass spectrum of high-energy neutron-rich nuclei, gamma rays and (anti) neutrinos, would carry away some mass of the star, leaving behind the core of the star in the form of a black hole. The conclusion is that such a process, if at all possible, hardly represents a significant phenomenon in nature.