Experimental study of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>19</mml:mn></mml:msup></mml:math>O(<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>d</mml:mi></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mn>20</mml:mn></mml:msup></mml:math>O

Hoffman, C. R.; Back, B. B.; Kay, B. P.; Schiffer, J. P.; Alcorta, M.; Baker, S.; Bedoor, S.; Bertone, P. F.; Clark, J. A.; Deibel, C. M.; DiGiovine, B.; Freeman, S. J.; Greene, J. P.; Lighthall, J. C.; Marley, S. T.; Pardo, R. C.; Rehm, K. E.; Rojas, A.; Santiago-Gonzalez, D.; Sharp, D. K.; Shetty, D. V.; Thomas, J. S.; Wiedenhöver, I.; Wuosmaa, A. H.

doi:10.1103/physrevc.85.054318

Cited by 19 publications

(5 citation statements)

References 63 publications

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“…It could be related to the limited configuration space or to the insufficient configuration mixing. The latter is consistent with the results of the measurements of the spectroscopic factor (S) by Hoffman et al [36]. The cross sections for 0 + 1 and 4 + 1 states were computed with L = 2 transfer and large S-factor obtained are compatible with the occupancy of the d-orbitals only.…”

supporting

confidence: 90%

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High-Precision Spectroscopy of O20 Benchmarking Ab Initio Calculations in Light Nuclei

Zanon,

Clément,

Goasduff

et al. 2023

Phys. Rev. Lett.

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supporting

confidence: 90%

“…The ground state, the 2 + 1 at 1.67 MeV, the 4 + 1 at 3.55 MeV, the 2 + 2 at 4.07 MeV and 3 + 1 states at 5.23 MeV were observed. Moreover, two additional states, already identified in [36] and both tentatively assigned as J π = (2 + 3,4 ), were observed. Excited states above the neutron separation threshold in 20 O were populated [37].…”

mentioning

confidence: 82%

High-Precision Spectroscopy of O20 Benchmarking Ab Initio Calculations in Light Nuclei

Zanon,

Clément,

Goasduff

et al. 2023

Phys. Rev. Lett.

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“…A Woods-Saxon form was used for the 11 Be + n binding potential, with a fixed radius and diffuseness of 1.25 fm and 0.65 fm, respectively. These geometrical parameters were widely adopted for loosely-bound states in light nuclei [2,[39][40][41]. The well depth of this binding potential was adjusted to reproduce the correct excitation energies [25], and the obtained values are 65.18 MeV and 56.49 MeV, respectively, for the 0 + 1 and 0 + 2 states.…”

Section: Resultsmentioning

confidence: 99%

A new measurement of the intruder configuration in 12Be

Chen

Lou

et al. 2018

Physics Letters B

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A new 11 Be(d, p) 12 Be transfer reaction experiment was carried out in inverse kinematics at 26.9A MeV, with special efforts devoted to the determination of the deuteron target thickness and of the required optical potentials from the present elastic scattering data. In addition a direct measurement of the cross section for the 0 + 2 state was realized by applying an isomer-tagging technique. The s-wave spectroscopic factors of 0.20 +0.03 −0.04 and 0.41 +0.11 −0.11 were extracted for the 0 + 1 and 0 + 2 states, respectively, in 12 Be. Using the ratio of these spectroscopic factors, together with the previously reported results for the p-wave components, the single-particle component intensities in the bound 0 + states of 12 Be were deduced, allowing a direct comparison with the theoretical predictions. It is evidenced that the ground-state configuration of 12 Be is dominated by the d-wave intruder, exhibiting a dramatic evolution of the intruding mechanism from 11 Be to 12 Be, with a persistence of the N = 8 magic number broken.

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“…27 (a) shows that present results reasonably agree with these experimental candidates, supporting the above-mentioned clustering systematics. Unfortunately, the experimental information for 20 O is rather obscure [214][215][216][217], and we expect further experimental studies will reveal the clustering systematics and the relationship between the molecular-orbit and atomic-orbit states.…”

Section: Fig 28 Intrinsic Density Distributions Ofmentioning

confidence: 99%

Antisymmetrized molecular dynamics studies for exotic clustering phenomena in neutron-rich nuclei

Kimura¹,

Suhara²,

Kanada-En’yo³

2016

Eur. Phys. J. A

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We present a review of recent works on clustering phenomena in unstable nuclei studied by antisymmetrized molecular dynamics (AMD). The AMD studies in these decades have uncovered novel types of clustering phenomena brought about by the excess neutrons. Among them, this review focuses on the molecule-like structure of unstable nuclei.One of the earliest discussions on the clustering in unstable nuclei was made for neutron-rich Be and B isotopes. AMD calculations predicted that the ground state clustering is enhanced or reduced depending on the number of excess neutrons. Today, the experiments are confirming this prediction as the change of the proton radii. Behind this enhancement and reduction of the clustering, there are underlying shell effects called molecular-and atomic-orbits. These orbits form covalent and ionic bonding of the clusters analogous to the atomic molecules. It was found that this "molecular-orbit picture" reasonably explains the low-lying spectra of Be isotopes. The molecular-orbit picture is extended to other systems having parity asymmetric cluster cores and to the three cluster systems. O and Ne isotopes are the candidates of the former, while the 3α linear chains in C isotopes are the latter. For both subjects, many intensive studies are now in progress.We also pay a special attention to the observables which are the fingerprint of the clustering. In particular, we focus on the monopole and dipole transitions which are recently regarded as good probe for the clustering. We discuss how they have and will reveal the exotic clustering.where X denotes Z i , ν or χ i . λ and µ are arbitrary numbers, but µ must have negative sign. The energy of the system H is defined as (8) As time t being evolved by the Eq. (7), the energy of the system is decreased and we obtain the set of parameters which minimizes the energy of the system. The calculation which employs the eigenstate of the parity Φ π to evaluate the energy is called variation before angular momentum projection (VBP), while the calculation employing the eigenstate of parity and angular momentum Φ Jπ M K is called variation after angular momentum projection (VAP) [42]. In the case of VBP, the angular momentum projection is performed after the energy minimization.To obtain the wave functions which have the configurations different from the energy minimum, the constrained energy minimization is often performed in VBP calculations. For example, the constraint on the quadrupole deformation parameter β is imposed by adding the constraint potential to the energy asHere, the magnitude of constraint potential v β is chosen large enough so that the deformation parameter β of the wave function approximately equals to β 0 after the energy minimization.Another way to obtain the excited configurations is orthogonalization method [42] that is used in VAP calculatons in which the variational wave function is orthogonalized to the energy minimum state By applying this procedure successively, the second, third and more excited configurations are obtained. He...

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Experimental study of the19O(d,p)20O

Cited by 19 publications

References 63 publications

High-Precision Spectroscopy of O20 Benchmarking Ab Initio Calculations in Light Nuclei

High-Precision Spectroscopy of O20 Benchmarking Ab Initio Calculations in Light Nuclei

A new measurement of the intruder configuration in 12Be

Antisymmetrized molecular dynamics studies for exotic clustering phenomena in neutron-rich nuclei

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