12C-α elastic scattering and states of 16O between 9.16 and 12.11 MeV

Determination of theE1component of the low-energyC12(Tang1, Rehm2, Ahmad3 et al. 2010Phys. Rev. C4310581View full textAdd to dashboardCite

“…For the α + 12 C phase shifts, again several data sets are available [15,18,19,50,51]. In the analysis of Ref.…”

The C12(α,γ)O16deBoer1, Görres2, Wiescher3 et al. 2017Rev. Mod. Phys.19981431View full textAdd to dashboardCite

“…V it is described how several scattering experiments (Clark et al, 1968;D'Agostino-Bruno et al, 1975;Plag et al, 2012;Tischhauser et al, 2009) have been performed in order to constrain the values of the ANCs of the subthreshold states as well as the particle widths of the unbound states. Here only the data of Tischhauser et al (2009) (the higher energy analysis was worked out subsequently in deBoer et al (2012a)) are considered as they represent the most precise and accurate measurement, cover the broadest energy range, and are in good agreement with previous studies.…”

“…As a culmination of these early measurements, Barker (1971) performed the first comprehensive R-matrix analysis by fitting iteratively the scattering phase shifts of Clark et al (1968), Jones et al (1962) and Morris et al (1968), the β delayed α data of Hättig et al (1970), and the capture cross section data of . The main goal was to re-analyze all of the data within a self consistent analysis in an effort to resolve the inconsistent determinations of θ 2 α (7.12 MeV).…”

“…A detailed scattering measurement was performed at Australia National University by Clark et al (1968) and the effect of the subthrehold state was subsequently analyzed by Clark (1969) using a multilevel R-matrix analysis. While, the effect of the subthreshold state was shown to contribute significantly to the scattering cross section, the uncertainty in the extracted phase shifts, and the need for a large background pole in the R-matrix analysis, resulted in a large uncertainty in θ 2 α (7.12 MeV) of 0.71 +0.37 −0.18 .…”

Statistical analysis of cross-section data for 12C(4He,4He)12C backscattering

“…Davies et al [27] The data of Clark et al [29] and of Morris et al [30] at several angles have a too sparse energy spacing to be useful for our purposes.…”