Cluster Structure of9Be from3He+9Be Reaction

Harakeh, Mohsen; Науменко, М. А.; Xu, Y.; Trzaska, W. H.; Burjan, V.; Kroha, V.; Mrázek, J.; Глаголев, В. В.; Piskoř, Š.; Voskoboynik, E. I.; Khlebnikov, S. V.; Penionzhkevich, Yu. É.; Скобелев, Н. К.; Sobolev, Yu. G.; Tyurin, G. P.; Кутербеков, К. А.; Tuleushev, Yu. Zh.

doi:10.1088/1742-6596/724/1/012031

Cited by 14 publications

(13 citation statements)

References 9 publications

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“…Decay rates were determined for the 2.429(5/2 − ) MeV resonance of 9 Be into three decay modes, 5 He + 4 He, 8 Be +n, and α + α + n, and a total breakup cross section was deduced. It was also found that the decay via the 5 He + 4 He configuration is the strongest one, in good agreement with beta decay and transfer measurements [23][24][25][26][27][28], but not with inelastic scattering studies on light targets [29][30][31]. No theoretical interpretation of these data was performed.…”

Section: Introductionmentioning

confidence: 79%

Global study of Be9 + p at 2.72A MeV

et al. 2020

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Background: In our recent experiment, 9 Be +p at 5.67A MeV, the breakup decay rates to the three configurations, α + α + n, 8 Be * +n and 5 He + 4 He of 9 Be, were observed and quantified in the proton recoil spectra, in a full kinematics approach. Unfolding step by step the accessibility to the above configurations, it will require similar experiments at lower or/and higher energies. It will also require the interpretation of the data in a theoretical framework. Three-body models for the structure of 9 Be have been developed and applied to reactions with heavy targets. Further research on lighter targets is required for the best establishment of the model. Such models are relevant for the calculation of the corresponding radiative capture reaction rate, α(α, γ ) 9 Be followed by 9 Be(α, n) 12 C. The last is essential for the r-process abundance predictions. Purpose: Investigate the breakup decay rate of 9 Be +p at 2.72A MeV, where the direct configuration α + α + n is mainly accessible. Compare and interpret data at this low energy and at the higher energy of 5.67A MeV into a four-body continuum discretized coupled-channel formalism. Point out and discuss couplings to continuum. Methods: Our experimental method includes an exclusive breakup measurement in a full kinematic approach of 9 Be incident on a proton target at 24.5 MeV (2.72A MeV). Complementary the elastic scattering is measured and other reaction channels are evaluated from previous measurements under the same experimental conditions. The interpretation of present data at 2.72A MeV and previous data at 5.67A MeV, are considered in a four-body continuum discretized coupled channel (CDCC) approach, using the transformed harmonic oscillator method for the three-body projectile. Results: An elastic scattering angular distribution at 2.72A MeV is measured, which compares very well with CDCC calculations, indicating a strong coupling to continuum. At the same energy, the breakup and total reaction cross sections are measured as σ break = 2.5 ± 1m ba n dσ tot = 510 ± L90 mb, in good agreement with the calculated values of 3.7 and 433 mb, respectively. Further on, into the same theoretical framework, the elastic scattering and breakup cross section data at 5.67A MeV are found in very good agreement with the CDCC calculations. Conclusions: It was confirmed in a global experimental framework that four-body CDCC calculations can describe very well the data even at low energies. Coupling to continuum is very strong despite the small measured breakup cross section. Moreover, the present results support further our three-body model for the structure of 9 Be, validating relevant radiative reaction rates obtained previously.

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Section: Introductionmentioning

confidence: 79%

Global study of Be9 + p at 2.72A MeV

et al. 2020

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“…[18]. One-step transfer of the 5 He cluster was also indicated as a dominant process by Jarczyk et al [33] in studying the 12 C( 11 B, 6 Li) 17 O and 12 C(d, 7 Li) 7 Be reactions.…”

Section: Cluster-transfer Reactionmentioning

confidence: 92%

“…In our previous works [5,6,7], the 3 He interaction with 9 Be was studied and angular distributions of the reaction products in the following exit channels: 3 He+ 9 Be, 5 He+ 7 Be, 5 Li+ 7 Li, 6 Be+ 6 He, and 6 Li+ 6 Li, were measured. The obtained data were analysed within the framework of the optical-model (OM), the coupled-channel (CC) and the distorted-wave Born approximation (DWBA) approaches.…”

Section: Introductionmentioning

confidence: 99%

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Clusterization and strong coupled-channels effects in deuteron interaction with ⁹Be nuclei

Urazbekov

Деникин

Itaco

et al. 2019

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

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“…The main mistake of the paper is that the authors have used just two of five Yakubovsky components which can be applied only to describe one nucleon-halo bound nucleus composed of 4 He and a nucleon, whereas such a system does not exist in nature! If the fifth nucleon be a neutron, the five-body system 5 He is proven to be unbound [7][8][9][10][11][12][13]. As it is discussed in Ref.…”

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confidence: 94%