NEW RESULTS FOR RADIATIVE P-11B CAPTURE AT LOW ENERGIES

The results of new measurements of the yields of the 11B(p,γ)12C reaction of radiative capture to the ground and first excited states of 12C are presented. By normalizing these results to the corresponding experimental literature data, differential cross sections have been extracted for the angle 0° and for incident proton energies from 482 to 1337 keV. Based on the obtained differential cross sections and using literature data on the angular distributions of the 11B(p,γ)12C reaction in this energy region, the total cross sections and astrophysical S factors of the 11B(p,γ)12C reaction for transitions to the ground and first excited states of 12C have been determined with a statistical error of less than 10%. The experimental data obtained are well described within the framework of a modified potential cluster model with the classification of orbital states according to Young's diagrams and taking into account allowed and forbidden states. Based on the measured experimental cross sections and using the above theoretical model, the rate of this reaction was calculated in the temperature range from 0 to 100 million degrees of Kelvin. Within the limits of error, the results of this work are consistent with the data of earlier works.