Coulomb dissociation of light nuclei

Tostevin, J. A.; Rugmai, Supagorn; Johnson, R.C.

doi:10.1103/physrevc.57.3225

Cited by 71 publications

(63 citation statements)

References 25 publications

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“…Following the theories in [3], we present finite range quantum mechanical calculations of elastic Coulomb breakup of the halo nuclei 6 He and 19 C, which allow the use of realistic wave functions. We assume that the excitation of the projectile can be treated adiabatically, i.e.…”

mentioning

confidence: 99%

Coulomb break-up of halo nuclei within an adiabatic model

Banerjee

Tostevin

Thompson

1999

J. Phys. G: Nucl. Part. Phys.

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Abstract. We investigate the Coulomb dissociation of halo nuclei, assuming that the excitation of the projectile is to states in the low energy continuum. The method used retains all finite-range effects associated with the interactions between the breakup fragments and can use realistic wave functions for the halo nuclei. We apply the method to Coulomb breakup of 6 He and 19 C on heavy targets, at incident energies below 100 MeV/nucleon, for calculations of alpha particle energy distributions and parallel momemtum distributions of 18 C respectively. The absolute magnitudes of the energy distributions and the widths of the parallel momentum distributions are sensitive to the assumed structures of the halo nuclei.The study of breakup of halo nuclei is important for probing their structures. There have been several approximate theoretical analyses, both semi-classical [1] and quantum mechanical [2], on the Coulomb breakup of halo nuclei -particularly for 11 Li and 11 Be. For two-neutron halo nuclei, these calculations were not based upon realistic three-body wave functions of these nuclei. Instead, the two halo neutrons were treated as a 'dineutron' cluster orbiting the core. A zero-range approximation was assumed in the dineutron-core interaction. For the one-neutron halo nuclei, the use of the zero-range DWBA approximation [2] does not permit calculations for nons-wave projectiles. At high beam energies, the zero-range DWBA assumption is also of doubtful applicability, even for s-wave projectiles.Following the theories in [3], we present finite range quantum mechanical calculations of elastic Coulomb breakup of the halo nuclei 6 He and 19 C, which allow the use of realistic wave functions. We assume that the excitation of the projectile can be treated adiabatically, i.e. that the breakup configurations excited by the Coulomb interaction between the charged core and the target are low energy relative motion states between the breakup fragments. We also assume that there is no interaction between the valence neutron(s) and the target. Within the adiabatic model, the Coulomb breakup amplitude factors into two parts [4,5] -one part associated with the dynamics of the reaction, and the other factor with the structure of the halo nucleus through its ground state wave function. Calculations on the two-neutron halo nucleus 6 HeWe calculate the α-particle energy spectrum at θ α = 5• following the elastic breakup of 6 He on a Au target at beam energy of 65 MeV/nucleon, assuming two model 6 He threebody wave functions. These wave functions, both with the correct breakup threshold, are calculated using the hyperspherical harmonic expansion method. The first wave

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confidence: 99%

Coulomb break-up of halo nuclei within an adiabatic model

Banerjee

Tostevin

Thompson

1999

J. Phys. G: Nucl. Part. Phys.

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“…At the same time, the asymmetric spectrum shape suggests contributions from higher partial waves, post-acceleration effects, and/or interference with the nuclear breakup. A "pure-Coulomb" calculation in the framework of adiabatic approximation [3], for example, roughly accounts for the tendency of data but does not reproduce the distinctive difference between 208 Pb and other targets. This time the data should be truly useful to establish a theoretical treatment of Coulomb-breakup of loosely bound projectiles.…”

Section: Resultsmentioning

confidence: 99%

Study of breakup mechanism of a loosely bound projectile in a region of Coulomb-breakup dominance

Okamura¹,

Hatanaka²,

Ikeda

et al. 2010

EPJ Web of Conferences

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“…They concluded that the nuclear breakup was more dominant for the heaviest targets. This data has been validated by modern 3-body theories [22]; however, these models have not yet been demonstrated to work at lower energies. The role of Coulombic and nuclear breakup is clearly changing in this energy region and systematic measurements are needed.…”

Section: Neutron Production By Deuteron Breakupmentioning

confidence: 99%

Neutron beams from deuteron breakup at the 88-Inch cyclotron at Lawrence Berkeley National Laboratory

McMahan

Ahle

Bleuel

et al. 2007

Nd2007

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Abstract. Accelerator-based neutron sources offer many advantages, in particular tunability of the neutron beam in energy and width to match the needs of the application. Using a recently constructed neutron beam line at the 88 Inch Cyclotron at LBNL, tunable high-intensity sources of quasi-monoenergetic and broad spectrum neutrons from deuteron breakup are under development for a variety of applications.

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Coulomb dissociation of light nuclei

Cited by 71 publications

References 25 publications

Coulomb break-up of halo nuclei within an adiabatic model

Coulomb break-up of halo nuclei within an adiabatic model

Study of breakup mechanism of a loosely bound projectile in a region of Coulomb-breakup dominance

Neutron beams from deuteron breakup at the 88-Inch cyclotron at Lawrence Berkeley National Laboratory

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