1. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” New Detector at the Tandem Laboratory of INPP for astrophysics studies Axiotis Michail

2. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” Outline Heavy elements nucleosynthesis Heavy elements nucleosynthesis p-nuclei abundances p-nuclei abundances Measurement techniques Measurement techniques 4π γ summing method 4π γ summing method Experimental results Experimental results Our new detector Our new detector

3. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” s-process  100 yr  10 8 n/cm 3 (n,γ) β-β- s-nuclei r-nuclei s/r-nuclei unstable r-process  1 sec  10 20 n/cm 3 Heavy elements nucleosynthesis

4. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” C. Iliadis, Nuclear Physics of Stars (2008) p-nuclei abundances 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. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” γ angular distribution measurements 4π γ-summing method Measurement techniques

6. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” Spyrou et al. Phys. Rev. C 76,015802 (2007) pos. a pos. b pos. c 4π γ summing method

7. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” DTL-Bochum: 12 inch x12 inch NaI crystal Demokritos-Bochum Experimental results

8. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” 14 inch x 14 inch NaI crystal segmented in two – Up/Down Our new detector

9. 3 rd Annual INPP Meeting 17/6/2013 M. Axiotis Institute of Nuclear & Particle Physics NCSR “Demokritos” Thank you for your attention