Direct reaction spectroscopy of exotic nuclei

Tostevin, J. A.; Batham, P; Podolyák, G.; Thompson, I. J.

doi:10.1016/j.nuclphysa.2004.09.071

Cited by 5 publications

(10 citation statements)

References 22 publications

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“…[35]. Here, we extend these results to consider the stripping-diffraction mechanism contributions and consideration of unlike-pair knockout to confront the available experimental data quantitatively.…”

Section: Two-nucleon Removal Cross Sectionsmentioning

confidence: 63%

Two-nucleon correlation effects in knockout reactions fromC12

Simpson

Tostevin

2011

Phys. Rev. C

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Reactions that involve the direct and sudden removal of a pair of like or unlike nucleons from a fast projectile beam by a light target nucleus are considered. Specifically, we study the three two-nucleon removal channels from 12 C that populate final states in the 10 Be, 10 B, and 10 C reaction residues. The calculated two-nucleon removal cross sections and the residue momentum distributions are compared with available high-energy data at 250, 1050, and 2010 MeV per nucleon, i.e., data that are inclusive with respect to the bound final states of the residues. The measured np removal cross sections only are significantly greater than the values calculated, suggesting that the reaction mechanism observes enhanced np spatial correlations compared to those present in the shell-model wave functions.

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Section: Two-nucleon Removal Cross Sectionsmentioning

confidence: 63%

Two-nucleon correlation effects in knockout reactions fromC12

Simpson

Tostevin

2011

Phys. Rev. C

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“…To assist with planned, detailed theoretical comparisons of the CDCC and the timedependent calculations of [1], we assumed the same 10 Be-neutron Hamiltonian as Capel et al [1]. This has (parity-dependent) Woods-Saxon potential depth parameters chosen to reproduce the 2s 1/2 and 1p 1/2 11 Be bound states and the d 5/2 resonance near 1.8 MeV.…”

Section: Coupled Channels Model and Resultsmentioning

confidence: 99%

“…However, there is much evidence, e.g. [3], of a 20-30% excited 2 + core component in the 11 Be ground state and of resonant states in the low energy 10 Be+n continuum. Because of its weak binding, a non-perturbative treatment of the the breakup channel is necessary in reactions of 11 Be with a target nucleus.…”

Section: Introductionmentioning

confidence: 99%

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Coupled channels calculations of ¹¹Be breakup

Howell¹,

Tostevin²,

Al-Khalili³

2005

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

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Abstract. Recent measurements of the cross sections for the diffractive breakup of 11 Be on a light ( 12 C) target have been reported. These data cover a fraction of the final-state three-body phase space and cuts on these data exhibit resonant structures in the neutron-10 Be continuum. These breakup data provide a motivation to test the coupled discretised continuum channels method in the context of the spectroscopy of continuum states in 11 Be and similar neutron-rich systems near the dripline.

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“…Both the 10 B residue and the 12 C target were assumed have Gaussian-shaped mass distributions, with rms radii 2.30 and 2.32 fm, respectively. The isospin format TNAs are calculated using OXBASH in a p-shell model space using the WBP interaction [28], as in previous studies [29,30]. A more complete consideration of two-nucleon removal from 12 C will be discussed in a forthcoming article.…”

Section: A P-shell Example: 12 C(−np)mentioning

confidence: 99%

Correlations probed in direct two-nucleon removal reactions

Simpson

Tostevin

2010

Phys. Rev. C

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Final-state-exclusive momentum distributions of fast, forward-traveling residual nuclei, following two-nucleon removal from fast secondary radioactive beams of projectile nuclei, can and have now been measured. Assuming that the most important reaction mechanism is the sudden direct removal of a pair of nucleons from a set of relatively simple, active shell-model orbital configurations, such distributions were predicted to depend strongly on the total angular momentum I carried by the two nucleons-the final-state spin for spin 0 + projectiles. The sensitivity of these now-accessible observables to specific details of the (correlated) two-nucleon wave functions is of importance. We clarify that it is the total orbital angular momentum L of the two nucleons that is the primary factor in determining the shapes and widths of the calculated momentum distributions. It follows that, with accurate measurements, this dependence upon the L makeup of the two-nucleon wave functions could be used to assess the accuracy of (shell-or many-body-) model predictions of these two-nucleon configurations. By using several tailored examples, with specific combinations of active two-nucleon orbitals, we demonstrate that more-subtle structure aspects may be observed, allowing such reactions to probe and/or confirm the details of theoretical model wave functions.

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Direct reaction spectroscopy of exotic nuclei

Cited by 5 publications

References 22 publications

Two-nucleon correlation effects in knockout reactions fromC12

Two-nucleon correlation effects in knockout reactions fromC12

Coupled channels calculations of ¹¹Be breakup

Correlations probed in direct two-nucleon removal reactions

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Direct reaction spectroscopy of exotic nuclei

Cited by 5 publications

References 22 publications

Two-nucleon correlation effects in knockout reactions fromC12

Two-nucleon correlation effects in knockout reactions fromC12

Coupled channels calculations of 11Be breakup

Correlations probed in direct two-nucleon removal reactions

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Product

Resources

About

Coupled channels calculations of ¹¹Be breakup