Electron screening: can metals simulate plasmas? Marialuisa Aliotta School of Physics - University of Edinburgh International Workshop XXXIV on Gross Properties of Nuclei and Nuclear Excitations Hirschegg, Kleinwalsertal, Austria, January 15 - 21, 2006 electron screening d(d,p)t reaction in deuterated materials experimental results and interpretation testing the model overview of final results
Electron screening: can metals simulate plasmas?. Marialuisa Aliotta School of Physics - University of Edinburgh. electron screening d(d,p)t reaction in deuterated materials experimental results and interpretation testing the model overview of final results. - PowerPoint PPT Presentation
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Electron screening: can metals simulate plasmas?
Marialuisa Aliotta
School of Physics - University of Edinburgh
International Workshop XXXIV on Gross Properties of Nuclei and Nuclear Excitations
Hirschegg, Kleinwalsertal, Austria, January 15 - 21, 2006
electron screening
d(d,p)t reaction in deuterated materials
experimental results and interpretation
testing the model
overview of final results
in the lab and in stellar plasmas interaction is affected by presence of electrons
A.P.Jesus2, M.Junker9, K.U.Kettner10, B.Limata8, H.Luis2, J.P. Ribeiro2, V.Roca8, C. Rolfs1, M.Romano8, D. Schürmann1, E.Somorijai3, F.Strieder1, F. Terrasi7
1 Institut für Physik mit Ionenstrhalen, Ruhr-Universität Bochum, Germany2 Centro de Fisica Nuclear, Universidade de Lisboa, Portugal
3 Atomki, Debrecen, Hungary4 China Institute of Atomic Energy, Beijing, P.R.China
5 School of Physics, University of Edinburgh, UK6 INFN, Sezione di Padova, Padova, Italy
7 Dipartimento di Scienze Ambientali, Seconda Università di Napoli, Caserta, Italy8 Dipartimento di Scienze Fisiche, Università Federico II and INFN, Napoli, Italy
9 Laboratori Nazionali del Gran Sasso dell’INFN, Assergi, Italy10 Fachhochschule Bielefeld, Germany
the collaboration
My special thanks to Francesco Raiola and João Cruz for much of the material presented
investigate 6,7Li(p,a) reactions in different materials to test Zt dependence of UD
at room temperature
metals of group 3 and 4 and lanthanides all have HIGH hydrogen solubility y=1/x
in general, hydrogen solubility decreases with temperature
modified setup to investigate effects of temperature dependence
target
MACORCu plate
MACORgraphite
MACOR
thermosensor
diamond
diamondheater
Temperature dependence of H solubility
previous studies of 9Be(p,)6Li and 9Be(p,d)8Be reactions
[D. Zahnow et al. Z. Phys. A359 (1997)211]
on metallic Be targets led to Ue = 900±50 eV, not understood at that time
with neff(Be) = 0.21±0.04
T = 293 K
Zt = 4
UD = 870±80 eV
UA = 240 eV
Ue = UA + UD = 1110±80 eV
consistent with observation and further supporting Zt scaling of Debye model
Additional remarks
Zt scaling recently verified also for Zt=23 [50V(p,n)50Cr] and Zt=71 [176Lu(p,n)176Hf]