Asymptotic normalization coefficient from the 12 C ( 7 Li , 6 He ) 13 N reaction and the astrophysical 12 C ( p , γ ) 13 N reaction rate
نویسندگان
چکیده
Angular distribution of the 12C(7Li,6He)13N reaction at E(7Li) = 44.0 MeV was measured at the HI-13 tandem accelerator of Beijing, China. Asymptotic normalization coefficient (ANC) of 13N → 12C + p was derived to be 1.64 ± 0.11 fm−1/2 through distorted wave Born approximation (DWBA) analysis. The ANC was then used to deduce the astrophysical S(E) factors and reaction rates for direct capture in 12C(p, γ)13N at energies of astrophysical relevance.
منابع مشابه
ANCs for 14 and the Astrophysical S - factor for the 13 N C → + p 13 14 C p N ( , ) γ Reaction
In our previous report we presented preliminary results of the R-matrix analysis of the experimental data [1] of the astrophysical factors for the 13 reaction. This reaction is one of the important reactions of the CNO cycle. The R-matrix method allows us to treat in a consistent way, the resonant and nonresonant contribution, avoiding double counting. The R matrix nonresonant amplitudes are pa...
متن کاملAstrophysical S factor for 13 C „ p , g ... 14 N and asymptotic normalization coefficients
We reanalyze the C(p ,g)N radiative capture reaction within the R-matrix approach. The low-energy astrophysical S factor has important contributions from both resonant and onresonant captures. The normalization of the nonresonant component of the transition to a particular N bound state is expressed in terms of the asymptotic normalization coefficient ~ANC!. In the analysis we use the experimen...
متن کاملN „ 3 He , d ... 15 O as a probe of direct capture in the 14 N „ p , g ... 15 O reaction
Spectroscopic factors and asymptotic normalization coefficients ~ANCs! have been determined for bound states in O using the N(He,d)O reaction. These results are used to calculate the astrophysical S factor for direct capture in the N(p ,g)O reaction. We also discuss how uncertainties in optical-model parameters influence both the spectroscopic factors and the ANCs, and the effect that this has ...
متن کاملThe 14 N „ 7 Be , 8 B ... 13 C reaction and the 7 Be „ p , g ... 8 B S factor
The N(Be,B)C reaction was studied using an 85 MeV Be radioactive beam. The asymptotic normalization coefficients for the virtual transitions 7Be1p↔8B were determined from the measured cross section. These coefficients specify the amplitude of the tail of the B overlap function in the Be1p channel, and were used to calculate the astrophysical S factor for the direct capture reaction Be(p ,g)B at...
متن کاملAsymptotic normalization coefficients for 14 N ^ 13 C ¿ p from
The C( He,d) N proton transfer reaction has been measured at an incident energy of 26.3 MeV. Angular distributions for proton transfer to the ground state and excited states at 2.313 and 3.948 MeV in N are analyzed within the framework of the modified DWBA. Asymptotic normalization coefficients ~ANC’s! defining the amplitude of the tails of the N bound-state wave functions in the C1p channel ar...
متن کامل