Experimental study of the α-12C elastic scattering.R-matrix analysis of the phase shifts and16O levels

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

“…Several measurements were made to continue in the investigation of the astrophysically important CNO branch point reactions 15 N(p, α) 12 C (Bray et al, 1977;Pepper and Brown, 1976;Redder et al, 1982;Zyskind and Parker, 1979) and Rolfs and Rodney, 1974). Improved measurements of 12 C+α scattering were also made by D'Agostino- Bruno et al (1975).…”

“…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.…”

AstrophysicalSfactor of theC12(α,γ)O16An1, Chen2, Ma3 et al. 2015Phys. Rev. C23080View full textAdd to dashboardCite

“…= 7.5 MeV of Refs. [35,36] are not shown in this paper. The scattering data by Plaga et al [32] were obtained in the considerably better energy range in comparing with the other studies.…”

“…Such a procedure is necessary in cases when the analysis of 12 C(α, γ) 16 O is restricted to only one particular angular momentum, but the interference structures in all data, associated with all the resonance states, have been neglected [40,44]. Taking all angular momenta into account simultaneously, R-matrix fits of four group angular distributions and the associated data [32][33][34][35][36] are presented from E c.m. =1.1 to E c.m.…”

“…To investigate the specific role of the 16 O nucleus for the S factor, a wealth of experimental data have been accumulated over the past few decades, including the precise measurements of total cross-section of 12 C(α, γ) 16 O [7][8][9][10], γ-ray angular distributions of ground state transition [11][12][13][14][15][16][17][18][19][20][21][22], cascade transitions [8,12,23,24], β-delayed α spectra for 16 N [25][26][27][28], transfer reaction [29][30][31], elastic scattering 12 C(α, α) 12 C [32][33][34][35][36] and additional particle reaction 16±16 Kunz [15] 165±50 76±20 85±30 4±4 Brune [29] 159 101±17 42…”