51 research outputs found
Fusion11 Conference Summary
A summary account of the conference "Fusion11", held in Saint Malo, France,
May 2-6, 2011.Comment: 10 pages, 13 figure
Statistical Theory of Breakup Reactions
We propose alternatives to coupled-channels calculations with loosely-bound
exotic nuclei (CDCC), based on the the random matrix (RMT) and the optical
background (OPM) models for the statistical theory of nuclear reactions. The
coupled channels equations are divided into two sets. The first set, described
by the CDCC, and the other set treated with RMT. The resulting theory is a
Statistical CDCC (CDCC), able in principle to take into account many pseudo
channels.Comment: 15 pages, 4 figures. Contribution to: "4th International Workshop on
Compound-Nuclear Reactions and Related Topics (CNR*13)", October 7-11, 2013,
Maresias, Brazi
The astrophysical reaction 8Li(n,gamma)9Li from measurements by reverse kinematics
We study the breakup of 9Li projectiles in high energy (28.5 MeV/u)
collisions with heavy nuclear targets (208Pb). The wave functions are
calculated using a single-particle model for 9Li, and a simple optical
potential model for the scattering part. A good agreement with measured data is
obtained with insignificant E2 contribution.Comment: 4 pages, 3 figure
A Study of the Coulomb Dissociation of 8B and the 7Be(p, gamma)8B Reaction
We study the breakup reactions of 8B projectiles in high energy (50 and 250
MeV/u) collisions with heavy nuclear targets (208Pb). The intrinsic nuclear
wave functions are calculated using a simple model, as well as a simple optical
potential. We demonstrate that nuclear effects are negligible and evaluate the
contributions of various (E1, E2 and M1) multipolarities. A good agreement with
measured data is obtained with insignificant M1 contribution (at 50 MeV/u) and
very small E2 contribution.Comment: 7 pages, 9 figure
Big Bang nucleosynthesis as a probe of new physics
The Big Bang Nucleosynthesis (BBN) model is a cornerstone for the
understanding of the evolution of the early universe, making seminal
predictions that are in outstanding agreement with the present observation of
light element abundances in the universe. Perhaps, the only remaining issue to
be solved by theory is the so-called "lithium abundance problem". Dedicated
experimental efforts to measure the relevant nuclear cross sections used as
input of the model have lead to an increased level of accuracy in the
prediction of the light element primordial abundances. The rise of indirect
experimental techniques during the preceding few decades has permitted the
access of reaction information beyond the limitations of direct measurements.
New theoretical developments have also opened a fertile ground for tests of
physics beyond the standard model of atomic, nuclear, statistics, and particle
physics. We review the latest contributions of our group for possible solutions
of the lithium problem.Comment: 9 pages, 7 figures, version accepted for publication. Refs. 69 and 70
added upon reques
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