Resonance scattering and α-transfer reactions for nuclear astrophysics

Rogachev, G. V.; Johnson, E. D.; Mitchell, J.; Goldberg, V. Z.; Kemper, K. W.; Wiedenhöver, I.

doi:10.1063/1.3362563

Cited by 13 publications

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“…(See also Ref. [9] for details on this experimental technique). The 2D scatter plot for the kinematic coincidence between protons and 7 Be is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Structure of8B from elastic and inelastic7Be+pscattering

et al. 2013

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Background: Detailed experimental knowledge of the level structure of light weakly bound nuclei is necessary to guide the development of new theoretical approaches that combine nuclear structure with reaction dynamics.Purpose: The resonant structure of 8 B is studied in this work.Method: Excitation functions for elastic and inelastic 7 Be+p scattering were measured using a 7 Be rare isotope beam. Excitation energies ranging between 1.6 and 3.4 MeV were investigated.An R-matrix analysis of the excitation functions was performed. Conclusions: Identification of the 0 + , 2 + , 1 + states that were predicted by some models at relatively low energy but never observed experimentally is an important step toward understanding the structure of 8 B. Their identification was aided by having both elastic and inelastic scattering data. Direct comparison of the cross sections and phase shifts predicted by the TDCSM and ab initio No Core Shell Model coupled with the resonating group method is of particular interest and provides a good test for these theoretical approaches.

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“…(See also Ref. [9] for details on this experimental technique). The 2D scatter plot for the kinematic coincidence between protons and 7 Be is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

Structure of8B from elastic and inelastic7Be+pscattering

et al. 2013

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“…This is done using a code which takes into account the relevant experimental conditions. Details of the procedure can be found in [45].…”

Section: Experiments and Analysismentioning

confidence: 99%

α-cluster structure ofO18

et al. 2014

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Background: Clustering phenomena in N = Z nuclei provide an opportunity to understand the interplay between cluster and nucleon degrees of freedom. Purpose:To study resonances in the 18 O spectrum, populated in 14 C+α elastic scattering.Method: The Thick Target Inverse Kinematics (TTIK) technique was used to measure the excitation function for the 14 C+α elastic scattering. A 42 MeV 14 C beam was used to populate states of excitation energy up to 14.9 MeV in 18 O. The analysis was performed using a multi-level, multi-channel R-Matrix approach.Results: Detailed spectroscopic information, including spin-parities, partial α-and neutron-decay widths and dimensionless reduced widths, was obtained for excited states in 18 O between 8 and 14.9 MeV in excitation energy. Cluster-Nucleon Configuration Interaction Model calculations of the same quantities are performed and compared to the experimental results.Conclusions: Strong fragmentation of large α-cluster strengths is observed in the spectrum of 18 O making the α-cluster structure of 18 O quite different from the pattern of known quasi-rotational bands of alternating parity that are characteristic of N = Z, even-even nuclei like 16 O and 20 Ne.

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“…Elastic and inelastic scattering processes can be distinguished because the complete kinematics of the event is measured. More detailed description of the experimental technique can be found in [10].…”

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confidence: 99%

Low-lying states in 8B

Mitchell,

Rogachev,

Johnson

et al. 2010

Preprint

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Excitation functions of elastic and inelastic 7 Be+p scattering were measured in the energy range between 1.6 and 2.8 MeV in the c.m. An R-matrix analysis of the excitation functions provides strong evidence for new positive parity states in 8 B. A new 2 + state at an excitation energy of 2.55 MeV was observed and a new 0 + state at 1.9 MeV is tentatively suggested. The R-matrix and Time Dependent Continuum Shell Model were used in the analysis of the excitation functions. The new results are compared to the calculations of contemporary theoretical models.

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Resonance scattering and α-transfer reactions for nuclear astrophysics

Cited by 13 publications

References 0 publications

Structure of8B from elastic and inelastic7Be+pscattering

Structure of8B from elastic and inelastic7Be+pscattering

α-cluster structure ofO18

Low-lying states in 8B

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