caa a22 4500 469031700 CHVBK 20180323132745.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF00732925 doi (NATIONALLICENCE)springer-10.1007/BF00732925 On the description of multiple measurements of an unstable state [Elektronische Daten] [M. Braun, K. Urbanowski] The nondecay probability of an unstable particle at a definite moment of time is investigated provided this particle existed at all earlier observation moments separated with the time interval Δ. Using the usual postulates for quantum measurements it is proved that this probability is described by the exponential function of Δ>0, and it tends to 1 as Δ → 0. An approximate formula is found for the effective decay width Γ(Δ) appearing in the case of multiple measurements. It is shown that Γ(Δ) → 0 as Δ → 0. For Δ → ∞, the width Γ(Δ) → Γ0, with Γ0 being the standard decay with in Weisskopf-Wigner theory. At finite δ's Γ(Δ) may be smaller or greater than Γ0 depending on the parameters of the theory. Plenum Publishing Corporation, 1992 Braun M. Institute of Physics, Pedagogical University, Plac Slowianski 6, PL 65-069, Zielona Gora, Poland aut Urbanowski K. Institute of Physics, Pedagogical University, Plac Slowianski 6, PL 65-069, Zielona Gora, Poland aut Foundations of Physics Kluwer Academic Publishers-Plenum Publishers 22/4(1992-04-01), 617-630 0015-9018 22:4<617 1992 22 10701 https://doi.org/10.1007/BF00732925 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00732925 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Braun M. Institute of Physics, Pedagogical University, Plac Slowianski 6, PL 65-069, Zielona Gora, Poland aut NATIONALLICENCE 700 1- Urbanowski K. Institute of Physics, Pedagogical University, Plac Slowianski 6, PL 65-069, Zielona Gora, Poland aut NATIONALLICENCE 773 0- Foundations of Physics Kluwer Academic Publishers-Plenum Publishers 22/4(1992-04-01), 617-630 0015-9018 22:4<617 1992 22 10701 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer