New Detector at the Tandem Laboratory of INPP for astrophysics studies Axiotis Michail

1. New Detector at the Tandem Laboratory of INPP for astrophysics studies AxiotisMichail

2. Outline • Heavy elements nucleosynthesis • p-nuclei abundances • Measurement techniques • 4πγ summing method • Experimental results • Our new detector

3. Heavy elements nucleosynthesis β- s-nuclei (n,γ) r-nuclei s/r-nuclei p unstable p Z p p r-process 1 sec 1020 n/cm3 s-process 100 yr 108n/cm3 N

4. p-nuclei abundances C. Iliadis, Nuclear Physics of Stars (2008) Differences between observed and calculated by Hauser-Fesbach abundances of p-nuclei in the solar system Need to measure cross-sections to improve the “ingredients” of HF calculations

5. Measurement techniques 4πγ-summing method γ angular distribution measurements

6. pos. a pos. c pos. b 4πγ summing method Spyrou et al. Phys. Rev. C 76,015802 (2007)

7. Experimental results DTL-Bochum: 12 inch x12 inch NaI crystal Demokritos-Bochum Demokritos-Bochum Demokritos-Bochum

8. Our new detector 14 inch x 14 inch NaI crystal segmented in two – Up/Down

9. Thank you for your attention