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The appearance of time advance (due to distortion by the non-resonantbackground) instead of the expected time delay in the region of acompound-nucleus resonance in the center-of-mass (C-) system is known. Here atthe same conditions we study cross sections and durations of the neutron-nucleusscattering in the laboratory (L-) system. Here there are a review of paperswhere it is shown that such time advance is a virtual paradox and in theL-system the time-advance phenomenon does not occur and only the trivial timedelay is observed. At the same time the transformations from C-system into theL-system appear to be different from the standard kinematical transformationsbecause in the C-system the motion of a compound nucleus is absent but it ispresent in the L-system. Here we analyze the initial wave-packet motion (afterthe collision origin) and the cross section in the laboratory (L-) system. Alsohere (as physical revelations of profound general methodic and in very goodconsistent accordance with the experiment) several results of the calculatedcross sections for the neutron-nucleus in comparison with the experimental datain the L-system at the range of one or twooverlapped compound resonances are presented. It is shown in thespace-time approach that the standard cinematic transformations of crosssections from the C-system to the L-system are not valid because it isnecessary to consider the center-of-mass motion in the L-system. Finally on acorrect self-consistent base of the space-time description of the nuclear processesin the laboratory system with 3 particles in the final channel, the validity ofthe former approach is shown, which is obtained for the space-time descriptionof the nuclear processes with 2-particle channels earlier.

Space-Time Description of Cross Sections and Durations of Neutron-Nucleus Scattering near 1 - 2 Resonances in the C- and L-Systems