How stable are pulsons in the (Oslash4-)2 field theory?

Numerical experiments to the (1 + 1)-dimensional (Ø⁴_-)₂ equation are reported. In a certain amplitude region a soliton-antisoliton bound state Ø(x, t >) (pulson) decays much slower than exponentially in time. For 0.30 <~ Ø (0, t) <~ 1.44 the slope of the maximum amplitudes is found between 0 and -2 × 10^-6 per unit time. In consequence, the lower bound for the pulsons' lifetime can be essentially increased.