Results 41 to 50 of about 846,262 (295)

$\rho$-mass Modification in $He^3$ - a Signal of Restoration of Chiral Symmetry or Test for Nuclear Matter Models ?

, 1999
Two recent experiments have demonstrated that the effective $\rho$-mass in nuclear medium, as extracted from the $^3He(\gamma, \pi^+ \pi^-)$ reaction, is substantially reduced.
A. Bhattacharyya, Abhijit Bhattacharyya, E. Scomparin, G.E. Brown, G.E. Brown, G.J. Lolos, G.M. Huber, G.Q. Li, J. Alam, J. Piekarewicz, J.D. Walecka, K. Saito, K. Saito, M. Masera, R. Machleidt, S-L. Zhu, Sanjay K. Ghosh, Sibaji Raha, Th. Ulrich   +18 more
core   +1 more source

Cross section predictions for hydrostatic and explosive burning [PDF]

, 2006
We review different models used for reactions involved in nuclear astrophysics. The reaction rate is defined for resonant as well as for non-resonant processes. For low-density nuclei, we describe the DWBA method, the potential model, the R-matrix method,
Descouvemont, P., Rauscher, T.
core   +1 more source

Nuclear Level Densities [PDF]

EPJ Web of Conferences
Nuclear reaction models, and in particular compound nucleus reactions, require the knowledge of nuclear level densities (NLDs), among other ingredients. For decades, analytical expressions have been used in nuclear reaction codes, due to the freedom they
Hilaire Stéphane, Goriely Stéphane, Péru Sophie   +2 more
doaj   +1 more source

Comparison between chiral and meson-theoretic nucleon-nucleon potentials through (p,p') reactions [PDF]

, 2001
We use proton-nucleus reaction data at intermediate energies to test the emerging new generation of chiral nucleon-nucleon (NN) potentials. Predictions from a high quality one-boson-exchange (OBE) force are used for comparison and evaluation.
A.K. Opper, D. Alonso, D.R. Entem, E. Bleszynski, E. Epelbaum, E. Epelbaum, E. Epelbaum, E. J. Stephenson, F. Sammarruca, F. Sammarruca, F. Sammarruca, F. Sammarruca, H. de Vries, H. Seifert, J.A. Carr, J.M. Moss, K. Amos, L. Rikus, M. Lacombe, M.I. Haftel, P.J. Dortmans, R. Machleidt, V.G.J. Stoks   +22 more
core   +2 more sources

The Effects of Variations in Nuclear Interactions on Nucleosynthesis in Thermonuclear Supernovae [PDF]

, 2013
The impact of nuclear physics uncertainties on nucleosynthesis in thermonuclear supernovae has not been fully explored using comprehensive and systematic studies with multiple models.
Jose, Jordi, Parikh, Anuj, Roepke, Friedrich K., Seitenzahl, Ivo R.   +3 more
core   +1 more source

Self-consistent calculations of radiative nuclear reaction characteristics for 56Ni, 132Sn, 208Pb

EPJ Web of Conferences, 2017
The photon strength functions (PSF), neutron capture cross sections and average radiative widths of neutron resonances for three double-magic nuclei 56Ni, 132Sn and 208Pb have been calculated within the self-consistent version of the microscopic theory ...
Achakovskiy Oleg, Kamerdzhiev Sergei
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Uncertainty evaluation of nuclear reaction model parameters using integral and microscopic measurements. Covariances evaluation with CONRAD code

EPJ Web of Conferences, 2010
In the [eV;MeV] energy range, modelling of the neutron induced reactions are based on nuclear reaction models having parameters. Estimation of co-variances on cross sections or on nuclear reaction model parameters is a recurrent puzzle in nuclear data ...
Tommasi J., Bernard D., Noguere G., Archier P., Habert B., De Saint Jean C., Blaise P.   +6 more
doaj   +1 more source

Proton-rich nucleosynthesis and nuclear physics [PDF]

, 2012
Although the detailed conditions for explosive nucleosynthesis are derived from astrophysical modeling, nuclear physics determines fundamental patterns in abundance yields, not only for equilibrium processes. Focussing on the nu p- and the gamma-process,
Froehlich, C., Rauscher, T.
core   +2 more sources

The nuclear reaction model code MEDICUS [PDF]

ND2007, 2007
The new computer code MEDICUS has been used to calculate cross sections of nuclear reactions. The code, implemented in MATLAB 6.5, Mathematica 5, and FORTRAN 95 programming languages, can be run in graphical and command line mode. Graphical User Interface (GUI) has been built that allows the user to perform calculations and to plot results just by ...
openaire   +1 more source