Research topics: Research topics: Atomic physics Ion beam analysis Environmental science Solid state physics etc…
Nuclear reactions Main sequence stars: hydrogen burning Conversion of 4 protons into one 4He pp-chain(s)
Sun
Barrier penetration steeply (exponentially) dropping cross section Barrier penetration steeply (exponentially) dropping cross section Contains nuclear physics Easier to extrapolate
Low cross section low count rate - High intensity beams
- Long measurements
- Background reduction
Cosmic rays are difficult to avoid let’s go underground
74Se 74Se 78Kr 84Sr 92Nb 92,94Mo 96,98Ru 102Pd 106,108Cd 113In 112,114Sn 120Te 124,126Xe 130,132Ba 138La 136,138Ce 144,146Sm 156,158Dy 162Er 168Yb 174Hf 180Ta 180W 184Os 190Pt 196Hg
Secondary process Secondary process Gamma-induced /mainly (,n)/ reactions on s- and r-process seed isotopes (-process) High temperature needed: supernova explosions
~ 2000 isotopes ~ 20000 reactions ~ 2000 isotopes ~ 20000 reactions The models are not able to reproduce the p-isotope abundances
Alpha-induced reactions: 5-15 MeV Alpha-induced reactions: 5-15 MeV Cyclotron
Solar composition problem: contradiction between - Helioseismology (high precision)
- Solar model, supported by neutrino detection (high precision)
Many astrophysical processes involve short-lived radioactive nuclei Many astrophysical processes involve short-lived radioactive nuclei
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