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Neutron Pathways Nucleosynthesis
- 1. Teresa Kurtukian-Nieto LP2i Bordeaux/CNRS-IN2P3, Gradignan, France Nucleosynthesis of trans-iron elements Nuclear Physics Mid Term Plan in Italy LNL – Session Legnaro, April 11th-12th 2022
- 2. Nuclear Physics Mid Term Plan in Italy – LNL Session Nucleosynthesis processes beyond iron 1 Teresa Kurtukian-Nieto Text Neutron Pathways to Nucleosynthesis The r process (neutrino-wind, NS mergers, jet-SNe, etc) Nn 1020 n cm-3; The n process (explosive He-burning in CCSN) 1018 n cm-3 < Nn < 1020 n cm-3; The i process (H ingestion in convective He burning conditions) 1014 n cm-3 < Nn < 1016 n cm-3; Neutron capture triggered by the 22Ne(α,n)25Mg in massive AGB stars and super-AGB stars Nn < 1014 n cm-3; The s process (s process in AGB stars, s process in massive stars and fast rotators) Nn < few 1012 n cm-3 .
- 3. Nuclear Physics Mid Term Plan in Italy – LNL Session 2 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Experimental nuclear data at 1rst peak 89As
- 4. Nuclear Physics Mid Term Plan in Italy – LNL Session 3 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Experimental nuclear data at 2nd peak 151-153La 139-141Te
- 5. Nuclear Physics Mid Term Plan in Italy – LNL Session 4 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto O. Hall et al., Physics Letters B,816, 136266 (2021) How good are models? A. Algora et al., 105Mo FRDM-QRPA GT +ff T1/2 exp =35,6(16)s T1/2 Th= 30. 2 s
- 6. Nuclear Physics Mid Term Plan in Italy – LNL Session 5 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Experimental nuclear data at 1rst peak 82Zn,87Ge, 89As, 90Se
- 7. Nuclear Physics Mid Term Plan in Italy – LNL Session 6 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Experimental nuclear data at 2nd peak 151-153La 148Cs 142-143I 139-141Te 125-128Ag
- 8. Nuclear Physics Mid Term Plan in Italy – LNL Session 7 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto PHASE A Decay Station 134Cs
- 9. Nuclear Physics Mid Term Plan in Italy – LNL Session 8 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Use of SPES HRMS for isobar purification HRMS HE-RIB Cooler Tape station 1+ Area
- 10. Nuclear Physics Mid Term Plan in Italy – LNL Session 9 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Measurement of the decay characteristics Tape transport system Beam-on/off time sequence β-γ, γ-γ coincidence for β decay studies detection - b plastic scintillator - g germanium Can be coupled with a neutron-detector (NEDA) Pn of the nuclei of interest. neutron-gated γ-ray spectra • cycle length: •Half-lives 1T1/2 + 5 T1/2 + Tt •BR 1T1/2 + 3T1/2 + Tt Accumulation Transport Measuring time
- 11. Nuclear Physics Mid Term Plan in Italy – LNL Session 10 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Experimental nuclear data
- 12. Nuclear Physics Mid Term Plan in Italy – LNL Session 11 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Decay schemes for (n,γ) cross-sections S. Nikas et al., https://arxiv.org/abs/2010.01698} Gamma ray emission in the Hauser-Feshbach model is described by the gamma-ray transmission coeficient.
- 13. Nuclear Physics Mid Term Plan in Italy – LNL Session 12 Activation measurements of isotopes of interest for the s-process Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto
- 14. Nuclear Physics Mid Term Plan in Italy – LNL Session 13 Activation measurements of isotopes of interest for the s-process Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto CN accelerator.BELINA beam line
- 15. Nuclear Physics Mid Term Plan in Italy – LNL Session 14 Activation measurements of isotopes of interest for the s-process Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto PHASE A irradiation of radioactive targets produced at SPES PHASE B
- 16. Nuclear Physics Mid Term Plan in Italy – LNL Session 15 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Neutron capture cross sections via surrogate reaction approach Also 3He,4He
- 17. Nuclear Physics Mid Term Plan in Italy – LNL Session 16 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Neutron capture cross sections via surrogate reaction approach P(d, pg) = s(d,p) (E,J,p)*G(E,J,p,g) J ,p å What we measure: P(n,g) = s(n,g) (E,J,p)*G(E,J,p,g) J ,p å What we want: Decay of the formed compound nucleus (can be calculated) Entry state correction: spin-parity distribution needed!!
- 18. Nuclear Physics Mid Term Plan in Italy – LNL Session 17 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto 85Kr branching When b ~ n several paths are possible σ(85Kr) = (55 ± 45) mb N=50 At high neutron densities (5 x 108 n/cm3), about the 80% of the flux goes through 85Kr, allowing the production of 86Kr and 87Rb: --> 87Rb in AGB stars in an indicator of the neutron density! 86Kr, 87Rb, and 88Sr are all magic, with low neutron capture cross sections In low-mass stars: 88Sr produced In massive AGB: 87Rb When 22Ne neutron source is active 85Kr(d,p) w/ Ex=10 MeV, just above Sn
- 19. Nuclear Physics Mid Term Plan in Italy – LNL Session 18 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto SPES reaccelerated beams
- 20. Nuclear Physics Mid Term Plan in Italy – LNL Session 19 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Targets
- 21. Nuclear Physics Mid Term Plan in Italy – LNL Session 20 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Neutron capture cross sections via surrogate reaction approach
- 22. Nuclear Physics Mid Term Plan in Italy – LNL Session 21 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Instrumentation Traditional gamma/particle spectroscopy but state-of-the-art tech. PHASE B/C
- 23. Nuclear Physics Mid Term Plan in Italy – LNL Session 22 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Experimental nuclear data • (α, n)
- 24. Nuclear Physics Mid Term Plan in Italy – LNL Session 23 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto (α, n) reactions with reaccelerated SPES beams and SUGAR MHD SNe
- 25. Nuclear Physics Mid Term Plan in Italy – LNL Session 24 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto (α, n) reactions with reaccelerated SPES beams and SUGAR
- 26. Nuclear Physics Mid Term Plan in Italy – LNL Session 25 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto The production of molybdenum in stars: a nuclear astrophysics challenge
- 27. Nuclear Physics Mid Term Plan in Italy – LNL Session 26 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto The production of molybdenum in MHD SNe SUGAR@LNL coupled with NEDA PHASE B
- 28. Nuclear Physics Mid Term Plan in Italy – LNL Session 27 Text 12C PRODUCTION IN EXPLOSIVE SCENARIOS Teresa Kurtukian-Nieto Nucleosynthesis processes beyond iron
- 29. Nuclear Physics Mid Term Plan in Italy – LNL Session 28 Text 9Be(α,n)12C Teresa Kurtukian-Nieto Nucleosynthesis processes beyond iron
- 30. Nuclear Physics Mid Term Plan in Italy – LNL Session 29 Text 9Be(α,n)12C PHASE C Teresa Kurtukian-Nieto Nucleosynthesis processes beyond iron
- 31. Nuclear Physics Mid Term Plan in Italy – LNL Session 30 Text 4He(nn,γ)6He PHASE C Teresa Kurtukian-Nieto Nucleosynthesis processes beyond iron
- 32. Nuclear Physics Mid Term Plan in Italy – LNL Session 31 Nucleosynthesis processes beyond iron Teresa Kurtukian-Nieto Decay properties of neutron-rich nuclei at the first and second r-process peak : T1/2, Pn, decay schemes Neutron capture cross sections : s-process : activation measurements and surrogate reaction approach i-and r-process nucleosynthesis via surrogate reaction approach Abundances of the elements at the first r-process peak: (α,n) reactions R-process seeds: 9Be(α,n)12C; 4He(2n,γ)6He For a very long term: fission of heavy neutron-rich Separator able to cope with overlapping A/q SUMMARY
- 33. Extra 32
- 34. Nuclear Physics Mid Term Plan in Italy – LNL Session 33 The beta-decay rate in astrophysical plasmas may change depending on the spin of that state, even at relatively low temperatures. Possible measurement from 134Xe+208Pb or 133Cs(d,p) beams? Measurement of the 134Cs excited state at 60.03 keV, whose SPIN is not known: it is currently identified as (3)+. It may be 3+, 4+ or 5+.