Speaker
Description
Heavier p isotopes are believed to be produced through the γ-process. The path of γ-process can be modelled with network calculations. These calculations include about 20000 reactions on more than 2000, mostly unstable nuclei, many of these reactions involves alpha particles. Theoretical cross sections of reactions involving alpha particles are found to be very sensitive to the alpha-nucleus optical potential, which is not known well enough at low, astrophysical energies. This potential can be studied experimentally by measuring the cross section of (α,n) reactions close above the reaction threshold. One
of the aims of my PhD work is thus to measure the cross section of the 122Te(α,n)125Xe, 124Te(α,n)127Xe and 130Te(α,n)133Xe reactions for which no data exist in literature. The half-life of the produced Xe isotopes allows us to use the activation technique. The experiments are done by using the cyclotron accelerator of ATOMKI. In this talk details of the experimental technique and the preliminary results of the measurements are presented.
As a second project of my PhD, the study 29Si(p,γ)30P reaction has been started. This reaction has an impact on the 29Si abundance in classical novae. The aim of this study to measure the direct capture cross section and determine the absolute resonance strength of the 𝐸𝑟 𝑐.𝑚.=403 keV resonance. For these measurements enriched silicon targets are used. The targets were created with thermal evaporation and several stability tests were made. Cyclic activation was the measurement technique. Some of the first direct capture and resonance strength measurements have already been done and the analysis of the
collected data is in progress. In this talk the experimental method will be presented shortly.
