The 12C+12C fusion reaction:a new opportunity at ATLAS

Xiaodong Tang1 & Chenglie Jiang2

1) Univ. of Notre Dame2) ANL

T. Spillane, U. Conn. Ph.D. Thesis (2008)

1) How to extrapolate average cross section?2) Are there any resonances around Gamow window? 3) What are the branchings?

T9=0.8

Heating target to 700 °C for 30 min

No ground state channels/ low eff. (1%)

Target Chamber

Detector coincidence to veto cosmic rays Ω=0.19 sr

Sample ΔE-E Matrix

d(12C,p)13C

Total proton cross section

E=3.5 MeV

Only proton channel

Preliminary “High”-Energy Proton Data

Good agreement between charged particle and gamma ray

T9=0.8

Low Counting Rates

• Low points on the order of 0.5 counts per day

• Large amounts of beam time necessary

• Susceptible to background contamination

• Any contaminants in the target lighter than carbon may contribute

Possible experiments at ATLAS

• Helios experiment • Particle gamma experiment

Large solid angle;Good particle ID (p, );Good energy resolution;Kinematics curve.

Particle-gamma experiment

Clear background;

But,No ground state.

10 g/cm2, 10 pA, 1 pb 3 evt/day 100 pb 300 evt/day