Nuclei in the Cosmos - IX

Session

2 Experiments in nuclear astrophysics I

26 Jun 2006, 11:45

CERN, Geneva

Conveners

2 Experiments in nuclear astrophysics I

• Alan Shotter (TRIUMF)

265. Underground Nuclear Astrophysics

Heide Costantini (U Genova/Notre Dame U)

26/06/2006, 11:45

Experiments in nuclear astrophysics

Invited

Cross section measurements for quiescent stellar H and He burning are hampered mainly by extremely low counting rate and cosmic background. Some of the main reactions of H-burning phase have been measured at the LUNA facility (Laboratory for Underground Nuclear Astrophysics) taking advantage of the very low background environment of the Underground Gran Sasso National Laboratory in...

45. The 26gAl(p,g)27Si reaction in Novae

C Ruiz (TRIUMF, Vancouver, BC V6T 2A3, Canada)

26/06/2006, 12:15

Experiments in nuclear astrophysics

Oral contribution

The strength of the 188 keV resonance in the 26gAl(p,g)27Si reaction has been measured directly in inverse kinematics using the DRAGON recoil separator at TRIUMF-ISAC. Radioactive 26Al beams with peak intensities of 5 x 10^9 ions/sec were utilised in conjunction with a windowless, recirculating hydrogen gas target. Recoil 27Si ions were separated and detected with a double-sided silicon...

50. Direct measurement of the 18F(p,a)15O reaction for application to nova gamma-ray emission.

Nicolas de Sereville (Universite catholique de Louvain)

26/06/2006, 12:35

Experiments in nuclear astrophysics

Oral contribution

The 18F nucleus is one of the radioactive isotope produced during nova explosions. It is of particular interest since it is the main responsible for the 511 keV gamma-ray emission of novae that could be detected with the INTEGRAL satellite or future gamma-rays telescope. The amount of 18F synthesised still suffers from large uncertainties coming from missing nuclear information concerning...

218. Measuring Difficult Reaction Rates Involving Radioactive Beams: A New Approach

Mats Lindroos (CERN)

26/06/2006, 12:55

Experiments in nuclear astrophysics

Oral contribution

Rates of sub-barrier, radiative capture reactions involving radioactive reactants, needed for understanding various astrophysics explosive scenarios, are often quite difficult to measure directly at relevant stellar temperatures. In general relatively intense radioactive beams (>1011/s) are needed for these inverse kinematic studies, as cross sections are very low. A new production...