Nuclear astrophysics at ISOLDE

Transcription

1 Nuclear astrophysics at ISOLDE Oliver Sølund Kirsebom Aarhus University 19 August 2015 NICE workshop, SDU

2 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

3 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

4 Nuclear astrophysics Hans Bethe Nobel Prize 1967 "Energy production in stars" William Fowler Nobel Prize 1983 "Formation of the chemical elements" Raymond Davis Jr. & Masatoshi Koshiba Nobel Prize 2002 "Detection of cosmic neutrinos"

5 Nuclear astrophysics

6 ISOLDE: Radioactive beam CERN

7 ISOLDE: Radioactive beam CERN

8 ISOLDE: Radioactive beam CERN e.g. ISOLDE decay station

9 ISOLDE: Radioactive beam CERN e.g. MINIBALL e.g. ISOLDE decay station

10 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

11 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

12 Electron-capture supernovae (ECSN) Characteristics: 8-12 solar-mass star ONeMg core Electron capture collapse Open questions: Explosion mechanism? (corecollapse or thermonuclear) Nucleosynthesis output?

13 Electron-capture supernovae (ECSN) Characteristics: 8-12 solar-mass star ONeMg core Electron capture collapse Open questions: Möller et al. (2014) Explosion mechanism? (corecollapse or thermonuclear) Nucleosynthesis output?

14 20 20 The role of Ne(e,ν) F Martinez-Pinedo et al. (2014)

15 Laboratory measurement detector β 20 F ISOLDE beam catcher foil ν

16 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

17 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

18 Stellar helium burning γ 4 4 He 12 He 4 He C

19 Stellar helium burning γ He 12 He 4 C He γ 16 O He

20 Far-reaching implications The C/O ratio at the end of helium burning affects... Stellar evolution

21 Far-reaching implications The C/O ratio at the end of helium burning affects... Stellar evolution Nucleosynthesis

22 Far-reaching implications The C/O ratio at the end of helium burning affects... Stellar evolution Nucleosynthesis Cosmology

23 Far-reaching implications The C/O ratio at the end of helium burning affects... Stellar evolution Nucleosynthesis Cosmology Life

24 12 The laboratory C(α,γ) cross section

25 12 The laboratory C(α,γ) cross section

26 16 Indirect method: N beta decay

27 16 Indirect method: N beta decay Accepted proposal:

28 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

29 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

30 Big Bang Nucleosynthesis (BBN)

31 The cosmological lithium problem A. Coc et al. (2013)

32 The cosmological lithium problem L. Izzo et al. (2015) A. Coc et al. (2013)

33 A nuclear physics solution? d + 7Be 9B* p + α + α Cyburt & Pospelov (2009)

34 A nuclear physics solution? d + 7Be 9B* p + α + α C. Scholl et al. (2011) Cyburt & Pospelov (2009)

35 A nuclear physics solution? d + 7Be 9B* p + α + α C. Scholl et al. (2011) Cyburt & Pospelov (2009)

36 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

37 1. Experiments with radioactive beams 2. Electron-capture supernovae 3. Stellar helium burning 4. The cosmological lithium problem

38 ISOLDE Ion storage ring

39 ISOLDE Ion storage ring e.g. (p,γ) and (α,γ) reactions for the rp- and p-process

40 Thanks to my collaborators Aarhus University (DK), ISOLDE, CSIC (Spain), TRIUMF (Canada), University of York (UK), Chalmers University (Sweden), University of Jyväskylä (Finland),...

41 Thanks to my collaborators Aarhus University (DK), ISOLDE, CSIC (Spain), TRIUMF (Canada), University of York (UK), Chalmers University (Sweden), University of Jyväskylä (Finland),... Thanks to my sponsor

42 Thanks to my collaborators Aarhus University (DK), ISOLDE, CSIC (Spain), TRIUMF (Canada), University of York (UK), Chalmers University (Sweden), University of Jyväskylä (Finland),... Thanks to my sponsor And thanks to you for your attention!