Intermediate structure and statistical fluctuations in theC12+Mg

Abstract

The 180 c.m. excitation function of the elastic and inelastic scattering of ' C on a Mg target has been measured between 12and 27-MeV c.m. energy. A statistical analysis of the data has been performed and it has turned out that the presence of intermediate structures cannot be completely ruled out in the compound dinuclear system Ar. Unfortunately, a complete phase shift analysis of several elastic scattering angular distributions measured on the maxima of these resonant structures shows that no spin assignment can be made. Therefore these intermediate structures appear to be spoiled by a more complex statistical resonance noise. At low incident energy, the Blair phase rule for oscillations in angular distributions is verified between the first 2+ target inelastic scattering and the elastic scattering. NUCLEAR REACTIONS Measured elastic and inelastic excitationfunctions at |9, =180' for ' C+ Mg, 12~E, m &27 MeV. Deduced average width and autocorrelation and cross-correlation functions of the observed structure. Complete phase shift analysis of the elastic angular distributions measured at 24.8, 27.70, 28.60, 31.20, and 34.80 MeV ' C incident energy; angular range 10' to 180' c.m. Inelastic scattering data at the same energies. Partial observation of the Blair phase rule.

Possible hyperdeformed band inAr36observed inC12Sciani1, Otani2, Lépine‐Szily3 et al. 2009Phys. Rev. C350110View full textAdd to dashboardCite

“…There is a qualitative agreement between the calculation and the data, the positions of the peaks are reproduced, but the difference in absolute values can be a problem in the relative normalization between our angular distributions and the excitation function of Ref. [31].…”

“…= 16.53 MeV [31] was not well reproduced by the inclusion of the l r = 2, 4, 6, and 7h resonances in the S matrix.…”

“…• in our energy range [31] with the results of our calculations at the same angle, adding the five Breit-Wigner form resonances S res l r to the background optical model S-matrix elements [see Eq. (2) and Table I].…”

“…An angular distribution measured at E c.m. = 16.53 MeV by Mermaz and collaborators [31] was also included in our analysis.…”

Effect of a finite-time resolution on Schrödinger cat states in complex collisions

“…In order to have the time resolution ∆t cr one has to measure the cross section on the energy interval ∆E ≃h/∆t cr = (I/π)hω. For the above considered 12 C+ 24 Mg elastic and inelastic scattering [13,14] we have I = 14 andhω =1.35 MeV [3]. This yields ∆E ≃ 6 MeV.…”