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3 results on '"break-up reaction"'

1. Study of break-up reactions of light dicluster nuclei.

Author

Fortunato, L. and Vitturi, A.

Subjects
*LITHIUM, *MAGNETIC dipoles, *ELECTROMAGNETISM, *QUADRUPOLES, *HEAVY ions, *COULOMB functions
Abstract

The light weakly-bound nucleus 7Li is studied within a dicluster α + t picture. Different observables obtained within our simple model are compared with previous calculations and experiments showing good agreement. In particular we calculate dipole and quadrupole electromagnetic response to the continuum. The energy distribution of B(Eλ) values are consistent with the energy weighted molecular sum rule and display a sizable contribution of non-resonant character arising from the weak binding property. The corresponding form factors for excitations to the continuum are used in a semiclassical coupled channel scheme to get estimates for the break-up cross section in a heavy ion reaction. The nuclear contribution is found to play an important role in the process for bombarding energies around the Coulomb barrier. The masses and charges ratios of the two clusters are shown to lead to features of the cluster halo that may significantly differ from the one usually associated with one-nucleon haloes. Various features of structural properties of weakly-bound dicluster nuclei may be studied with this simple formalism and their properties may be used to get accurate estimates for break-up cross-sections. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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2. Measurements of scattering observables for the $pd$ break-up reaction

Author

Eslami-Kalantari, M., Amir-Ahmadi, H. R., Biegun, A., Gasparic, I., Joulaeizadeh, L., Kalantar-Nayestanaki, N., St Kistryn, [No Value], Kozela, A., Mardanpour, H., Messchendorp, J. G., Moeini, H., Ramazani-Moghaddam-Arani, A., Shende, S. V., Stephan, E., Sworst, R., Eplelbaum, E, Hammer, HW, Meibner, UG, and KVI - Center for Advanced Radiation Technology

Subjects
Physics, Break-Up, Scattering, QC1-999, Measurements, Nuclear Theory, FOS: Physical sciences, Observable, ANALYZING POWERS, Polarization (waves), Nuclear physics, ELASTIC-SCATTERING, break-up reaction, Phase space, scattering observables, Nuclear Experiment (nucl-ex), Nuclear Experiment, 3-NUCLEON FORCE
Abstract

High-precision measurements of the scattering observables such as cross sections and analyzing powers for the proton-deuteron elastic and break-up reactions have been performed at KVI in the last two decades and elsewhere to investigate various aspects of the three-nucleon force (3NF) effects simultaneously. In 2006 an experiment was performed to study these effects in $\vec{p}+d$ break-up reaction at 135 MeV with the detection system, Big Instrument for Nuclear polarization Analysis, BINA. BINA covers almost the entire kinematical phase space of the break-up reaction. The results are interpreted with the help of state-of-the-art Faddeev calculations and are partly presented in this contribution., Comment: Proceedings of 19th International IUPAP Conference on Few-Body Problems in Physics, Bonn University, 31.08 - 05.09.2009, Bonn, GERMANY

Published
2010
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3. Evidence of the Coulomb force effects in the cross sections of the deuteron-proton breakup at 130 MeV

Author

W. Zipper, Kazimierz Bodek, Izabela Ciepał, R. Sworst, A. Micherdzinska, Nasser Kalantar-Nayestanaki, A. Kozela, St. Kistryn, Aleksandra Biegun, M. Kis, P. U. Sauer, Jacek Zejma, B. Kłos, A. C. Fonseca, E. Stephan, A. Deltuva, M. Mahjour-Shafiei, and Research unit Nuclear & Hadron Physics

Subjects
Nuclear and High Energy Physics, Proton, Nuclear Theory, FOS: Physical sciences, Few-body systems, Coulomb's law, Nuclear physics, symbols.namesake, break-up reaction, Breakup reaction, Coulomb, Nuclear force, SCATTERING, PARTICLES, ddc:530, Nuclear Experiment (nucl-ex), Nuclear Experiment, EQUATIONS, Physics, Cross section, COLLISION, Coulomb effects, EXPANSION, Breakup, deuteron induced reaction, liquid proton target, breakup reaction, coupled- channel calculation, Deuterium, symbols, Dewey Decimal Classification::500 | Naturwissenschaften::530 | Physik, Atomic physics, Excitation
Abstract

High precision cross-section data of the deuteron-proton breakup reaction at 130 MeV deuteron energy are compared with the theoretical predictions obtained with a coupled-channel extension of the CD Bonn potential with virtual Delta-isobar excitation, without and with inclusion of the long-range Coulomb force. The Coulomb effect is studied on the basis of the cross-section data set, extended in this work to about 1500 data points by including breakup geometries characterized by small polar angles of the two protons. The experimental data clearly prefer predictions obtained with the Coulomb interaction included. The strongest effects are observed in regions in which the relative energy of the two protons is the smallest., 9 pages, 3 figures, submitted to Physics Letters B

Published
2006

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