摘要: With the advent of “pion factories” and a number pion spectrometer facilities with especially high resolution, pion-nucleus physics is entering new era. Indeed, over past fifteen years, theories experiments on interactions nuclei have been mostly an exploratory nature only, only rarely they reached precision sophistication theoretical analyses in, say, electron-nucleus, muon-nucleus or photo-nuclear physics. It quite certain that this state field will change in near future—mainly under (expected) impetus more refined precise at accelerators. How rich actually has revealed, for instance, by measurements cross sections CERN group [1], proton induced production threshold Uppsala [2]. Both these which we quote as examples among other pioneering experiments, revealed rather unexpected features pion-nuclear subsequently stimulated great deal activity. In particular, it become clear that, potentially least, indeed good tool purpose studying aspects nuclear structure behaviour hadron matter—in way may well turn out to be complementary interaction nucleus electromagnetic weak probes.