E810: 23Mg(p,γ)24Al

Summary of setup, motivation,plan

Spokespersons: U. Greife, C. VockenhuberContact: L. Erikson

C. Iliadis et al. Ast. J. Supp. 142 (2002)

G. Lotay et al. Phys Rev C 77 (2008)

Proposal at DRAGON, 1998 U. Greife

No existing measurement of resonance strengths or protonspectroscopic factors, solely level energies

2 contributing states

2.61.40.5426Al

4.11.50.3722Na

Fac〈συ〉 x0.01

〈συ〉 x100

3.32.00.626Al

21.12.90.09522Na

Fac〈συ〉 x0.01

〈συ〉 x100

O-Ne model P2 Tpeak = 0.356 GK

O-Ne model S1 Tpeak = 0.418 GK

Level energies and calculated strengths

D.W. Visser et al. Phys Rev C 76 (2007)

R.G.T Zegers et al. Phys Rev C 78 (2008)

Yale 24Mg(3He,t)24Al results…Good agreement between 324Mg(3He,t)24Al experiments…

Gammasphere measurement: Ex = 2345.1(14), also updated adopted energies by Yalegroup for 2nd state above threshold: ER = 651(4) keV

Shell model(H. Herndl et

al. Phys rev C58 (1998))

Upper limit achieved: 6.5T region ωγ < 3.4 meV, 8.0T region ωγ < 17 meV

Plan for Nov/Dec:repeat originalexperiment for whichinsufficient minimumbeam intensityachieved (sort of).

Stable beam last weekend

524 A keV 684 A keV

23Na, 524A keV, 684A keV (asked for 519A keV, 682A keV)

0.5 - 3 enA (5+)

Attenuated beam runs into MCP/IC, 23Na(p,γ)24Mg runs at different chargestates….all is well.