Trojan Horse Method: a useful tool for electron screening effect investigation

0346829 - ÚJF 2011 RIV NL eng J - Journal Article
Pizzone, R. G. - Spitaleri, C. - Cherubini, S. - La Cognata, M. - Lamia, L. - Romano, S. - Sergi, M. L. - Tumino, A. - Li, C. - Wen, Q. - Zhou, S. - Burjan, Václav - Kroha, Václav - Mrázek, Jaromír - Carlin, N. - Del Santo, M. G. - de Toledo, A. S. - Kubono, S. - Wakabayashi, T. - Yamaguchi, H. - Rolfs, C.
Trojan Horse Method: a useful tool for electron screening effect investigation.
Nuclear Physics. A. Roč. 834, 1-4 (2010), 673C-675C. ISSN 0375-9474. E-ISSN 1873-1554.
[10th International Conference on Nucleus-Nucleus Collisions (NN2009). Beijing, 16.08.2009-21.08.2009]
Institutional research plan: CEZ:AV0Z10480505
Keywords : ASTROPHYSICAL IMPLICATIONS * NUCLEAR ASTROPHYSICS * S(E)-FACTOR
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 1.986, year: 2010

Direct measurements in the last decades have highlighted a new problem related to the lowering of the Coulomb barrier between the interacting nuclei due to the presence of the "electron screening" in the laboratory measurements. It was systematically observed that the presence of the electronic cloud around the interacting ions in measurements of nuclear reactions cross sections at astrophysical energies gives rise to an enhancement of the astrophysical S(E)-factor as lower and lower energies are explored [1]. Moreover, at present Such an effect is not well understood as the value of the potential for screening extracted from these measurements is higher than the tipper limit of theoretical predictions (adiabatic limit). On the other hand, the electron screening potential in laboratory measurement is different from that occurring in stellar plasmas thus the quantity of interest in astrophysics is the so-called "bare nucleus cross section". This quantity can only be extrapolated in direct measurements.
Permanent Link: http://hdl.handle.net/11104/0187748