The {sup 18}O(d,p){sup 19}O reaction and the ANC method

• Main Authors: Burjan, V., Hons, Z., Kroha, V., Mrázek, J., Piskoř, Š., Mukhamedzhanov, A. M., Trache, L., Tribble, R. E., La Cognata, M., Lamia, L., Pizzone, G. R., Puglia, S. M. R., Rapisarda, G. G., Romano, S., Sergi, M. L., Spartà, R., Spitaleri, C., Gulino, M., Tumino, A.
• Format: Conference Proceeding
• Language: English
• Subjects: ANGULAR DISTRIBUTION; ASYMPTOTIC SOLUTIONS; CAPTURE; COMPARATIVE EVALUATIONS; CZECH REPUBLIC; D CODES; DEUTERON REACTIONS; E CODES; EXCITATION; MEV RANGE; NEUTRON REACTIONS; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEOSYNTHESIS; OXYGEN 18 TARGET; OXYGEN 19; PROTONS; RED GIANT STARS; SI SEMICONDUCTOR DETECTORS; SURFACE BARRIER DETECTORS
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/1.4875304

The neutron capture rate {sup 18}O(n,γ){sup 19}O is important for analysis of nucleosynthesis in inhomogeneous Big Bang models and also for models of processes in massive red giant stars and AGB stars. Angular distributions of the {sup 18}O(d,p){sup 19}O reaction were measured at a deuteron energy of 16.3 MeV in NPI in Řež, Czech Republic, with the aim to determine Asymptotic Normalization Coefficients which can then be used for indirect determination of the direct contribution to the {sup 18}O(n,γ){sup 19}O process. In the experiment, the gas target with {sup 18}O isotope of high purity 99.9 % was used thus eliminating any contaminating reactions. Reaction products were measured by the set of 8 ΔE-E telescopes consisting of thin and thick silicon surface-barrier detectors. Angular distributions of proton transfers corresponding to 6 levels of {sup 19}O up to the 4.1093 MeV excitation energy were determined. The analysis of angular distributions in the angular range from 6 to 64 degree including also the angular distribution of elastically scattered deuterons was carried out by means of ECIS and DWUCK codes. From the determined ANCs the direct contribution to the radiative capture {sup 18}O(n,γ){sup 19}O was deduced and compared with existing direct measurements.