Slide 1

Low energy radioactive beams Carmen Angulo, CRC Louvain-la-Neuve, Belgium FINUPHY meetingLouvain-la-Neuve, Belgium3-4 May 2004 Recent highlights on nuclear astrophysics and exotic light nuclei at Louvain-la-Neuve

Slide 2

Carmen Angulo FINUPHY meeting 3-4 May 2004 CYCLONE44ARES LEDA s 6 He -delayed +d emission Study of 5 H and 7 He 10 C+p Study of 11 N 15 O( ) 15 O 19 Ne(p, ) 20 Na Hot CNO cycle 14 O( ,p) 17 F : trigger to the rp process 18 F( ,p) 21 Ne r-process nucleosynthesis 18 F(d,p) 19 F Novae -ray emission 18 F(p, ) 15 O 7 Be+p: charge symmetry and nuclear astrophysics 7 Be(d,p) 8 Be Big Bang Nucleosynthesis Unique set-ups Unique beams: 6 He, 7 Be, 18 F New beams: 10 C, 15 O, 19 Ne CYC44 New developments

Slide 3

Carmen Angulo FINUPHY meeting 3-4 May 2004 CYCLONE30 CYCLONE110 CYCLONE44 ARES LEDA beam line

Slide 4

Carmen Angulo FINUPHY meeting 3-4 May 2004 The first 19 Ne radioactive beam at CYCLONE44 Characterization of ARES and study of the 19 Ne(p, ) 20 Ne reaction Manol Couder, PhD thesis, June 2004

Slide 5

Carmen Angulo FINUPHY meeting 3-4 May 2004 (p, ) reactions in astrophysics Important in quiescent burning and in explosive environments such as Standard technique: detection . BUT Background problems Difficult determination of total efficiency Recoil separators for astrophysics research: ARES (Louvain-la-Neuve), ERNA (Bochum) ARES (Louvain-la-Neuve), ERNA (Bochum) DRAGON (TRIUMF) DRAGON (TRIUMF) novae X-ray bursts

Slide 6

Carmen Angulo FINUPHY meeting 3-4 May 2004 Wien filter Dipole magnet CH 2 Target ECR Source CYCLONE44 Quadrupoles doublet or triplet Detector Characterization with a 19 F stable beam: 19 F(p, ) 20 Ne Study of 19 Ne(p, ) 20 Na with a 19 Ne radioactive beam from CYCLONE44

Slide 7

Carmen Angulo FINUPHY meeting 3-4 May 2004 20 Ne 19 F leaky beam Characterization of ARES: 19 F(p, ) 20 Ne Beam energy distribution Beam transport : charge state distribution Product transmission: 20 Ne 7+ (11.5 0.4) % Rejection power: (2-5) 10 -7 19 F(p, ) 20 Ne M. Couder et al., NIM A 506 (2003)26. Energy (keV) Counts 456 7891011 5.0 4.5 4.0 3.5 3.0 2.5 Experiment Simulation Total efficiency

Slide 8

Carmen Angulo FINUPHY meeting 3-4 May 2004 19 Ne(p, ) 20 Na Na Ne+p 0 606 808 996 1338 1841 2064 2643 2856 2992 3082 2195 2 + 0 + 4 + 2 +/- 1 + 1 + 3 + 3 + 3 +/- - 3 - 2 - 1993 T=0.2 9 T=0.5 9 T=1.0 9 T=2.0 9 19 20 ? Previous experiments: Coszach et al. 1994 Page et al. 1994 Michotte et al. 1996 Vancraynest et al. 1998 Theory: Lamm et al. 1990 Fortune et al. 2000

Slide 9

Carmen Angulo FINUPHY meeting 3-4 May 2004 Study of the 448 keV resonance in 19 Ne(p, ) 20 Ne with a 19 Ne RIB Beam intensity ~ 10 8 pps (reduced) E (keV)ROILeftRight E+E (MeV) 19 Ne leaky beam pile-up 20 Ne reaction product expected M. Couder et al., Phys. Rev. C (R) (2004) RESULTS Upper limit with 90 % C.L.: