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Excitation of 6Li above the breakup threshold in the 6Li + 208Pb system around the Coulomb barrier.

Excitation of 6Li above the breakup threshold in the 6Li + 208Pb system around the Coulomb barrier.

Authors :
Mazzocco, M.
Scopel, P.
Signorini, C.
Fortunato, L.
Soramel, F.
Thompson, I. J.
Vitturi, A.
Barbui, M.
Brondi, A.
Cinausero, M.
Fabris, D.
Fioretto, E.
La Rana, G.
Lunardon, M.
Moro, R.
Ordine, A.
Prete, G. F.
Rizzi, V.
Stroe, L.
Trotta, M.
Source :
European Physical Journal A -- Hadrons & Nuclei; Dec2003, Vol. 18 Issue 4, p583-587, 5p
Publication Year :
2003

Abstract

The excitation energy above the breakup threshold of the α + d/<superscript>6</superscript>Li system, after the interaction of <superscript>6</superscript>Li nuclei with a <superscript>208</superscript>Pb target, was deduced from the invariant mass of the α + d system. Data were collected with a large-solid-angle detector set-up at four beam energies around the Coulomb barrier. The excitation of the <superscript>6</superscript>Li nucleus above the breakup threshold (1.47 MeV) has a quite similar behavior at each measured beam energy and angle; it is peaked at ∼ 1 MeV above the threshold and shows an exponential decay on the high energy side, which is a clear signature of a direct breakup process. The experimental excitation energies are reproduced both in shape and absolute value by 1) fully quantum-mechanical Coupled-Channel calculations with coupling to discretized-continuum <superscript>6</superscript>Li excitations, 2) semi-classical Coupled-Channel approach, where the relative motion is treated along a classical trajectory. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14346001
Volume :
18
Issue :
4
Database :
Complementary Index
Journal :
European Physical Journal A -- Hadrons & Nuclei
Publication Type :
Academic Journal
Accession number :
16708454
Full Text :
https://doi.org/10.1140/epja/i2003-10097-y