AGB news
November 2016:140Ce only playing card….
AGB news
February 2017….
140Ce
145Nd
146Nd
59Ni
60Fe
41Ca
Faite vos jeux rien ne va plus….!!!
Proposed measurements
140Ce
(n,γ)141Ce
s-process distributions in s-rich Globular Clusters
50%
Straniero et al. 2014
140Ce(n,γ)141Ce
140Ce
(abundance 88.5%) --> despite the large abundance, its cross section is
by far the lowest. Enriched isotope is needed.
KADONIS v1.0
KTS96 = F. Käppeler, K. Toukan, M. Schumann, and A. Mengoni, Phys. Rev. C 53, 1397 (1996).
COST: 10000 euros / 5 gr
AGB MODELS
+50% in cross section
+50% surface [Ce/Fe]
2 gr
5 gr
140Ce
145Nd
146Nd
59Ni
60Fe
41Ca
Faite vos jeux rien ne va plus….!!!
Neodimium isotopes in pre-solar SiC grains
Yin, lee & Ott 2006, ApJ 647 676
Ireland, T.R. et al., Ge.Co. Acta, submitted
145Nd(n,γ)146Nd(n,γ)147Nd
145Nd(n,γ)146Nd
WVK98a = K. Wisshak et al., Phys. Rev. C 57, 391 (1998).
146Nd(n,γ)147Nd
WVK98a = K. Wisshak et al., Phys. Rev. C 57, 391 (1998).
140Ce
145Nd
146Nd
60Fe
59Ni
41Ca
Faite vos jeux rien ne va plus….!!!
Radioactive isotopes and dust formation
Uttenthaler, S. 2013, A&A 556 38
Uttenthaler, S. in preparation
Stars with Tc show milder dust mass-loss
From FUNS stellar models
41Ca
and 60Fe also interesting for
Early Solar System radioactives
60Fe(n,γ)61Fe
URS09 = E. Uberseder, R. Reifarth, D.
Schumann, I. Dillmann, C. Domingo-Pardo,
J. Goerres, M. Heil, F. Käppeler, J.
Marganiec, J. Neuhausen, M. Pignatari, F.
Voss, S. Walter, and M. Wiescher, Phys.
Rev. Lett. 102, (2009) 151101.
Check at PSI: induced γ in URS09
7e15 atoms?
59Ni(n,γ)60Ni
59Ni(n,p)59Co
about 10 times smaller
Already available a sample @ CERN
(84 μg , 8.56e17 atoms?...EAR2?)
41Ca(n,α)38Ar
41Ca(n,p)41K
about 10 times smaller
41Ca(n,γ)41K
about 20 times smaller
De Smet, L. et al. 2006
41Ca(n,γ)41K
1e17 atoms?
GINEVRA…NEXT APRIL…