Structure of<sup>23</sup>Al from a multi-channel algebraic scattering model based on mirror symmetry

Fraser, P. R.; Kadyrov, Alisher; Massen-Hane, K.; Amos, K.; Canton, L.; Karataglidis, S.; Knijff, D. van der; Bray, Igor

doi:10.1088/0954-3899/43/9/095104

Cited by 10 publications

(6 citation statements)

References 37 publications

(183 reference statements)

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“…Narrow states have now been observed in other proton rich nuclei, e.g. 19 Na [15], 16 Ne [13], 15 Ne [16], and 23 Al [17], with narrow resonances of the latter found with an MCAS study [18]. They have been predicted for 21 Al [19] and 25 P [20].…”

Section: Introductionmentioning

confidence: 94%

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Mass-15 nuclei and predicting narrow states beyond the proton drip line

Fraser,

Amos,

Canton

et al. 2017

Preprint

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In a previous letter (Phys. Rev. Lett. 96, 072502 (2006)), the multi-channel algebraic scattering (MCAS) technique was used to calculate spectral properties for proton-unstable 15 F and its mirror, 15 C. MCAS achieved a close match to the then-new data for p+ 14 O elastic scattering and predicted several unusually narrow resonances at higher energies.Subsequently, such narrow resonance states were found. New cross section data has been published characterising the shape of the J π = 1 2 − resonance. Herein we update that first MCAS analysis and its predictions. We also study the spectra of the set of mass-15 isobars, 15 C, 15 N, 15 O, and 15 F, using the MCAS method and seeking a consistent Hamiltonian for clusterisation with a neutron and a proton, separately, coupled to core nuclei 14 C and 14 O.

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Section: Introductionmentioning

confidence: 94%

“…For a full description of how the 3pF charge distribution is implemented in MCAS, see Refs. [18,40].…”

Section: B the Charge Distribution And Electromagnetic Propertiesmentioning

confidence: 99%

Mass-15 nuclei and predicting narrow states beyond the proton drip line

Fraser,

Amos,

Canton

et al. 2017

Preprint

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“…As demonstrated in Refs. [14,15], the specific values of the 3pF parameters -radius, R c , diffuseness a c , and scaling parameter w c -are not important, provided they recreate the experimentally-known rms charge radius.…”

Section: Mass-11 Isobars As Cluster Systemsmentioning

confidence: 99%

Coupled-channel description for mirror mass-11 nuclei compared to shell-model structures

Amos¹,

Karataglidis²,

Canton³

et al. 2021

Preprint

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The spectra of mass-11 nuclei are unusual, and so pose a challenge for theoretical models of their structure. The set of isobars range from being well bound to nucleon emission ( 11 B, 11 C) through weakly bound ( 11 Li, 11 Be), with the former taking the form of a two neutron halo, to being proton unstable ( 11 N, 11 O). A self-consistent approach to understand this set of nuclei is especially important as the mirror pair 11 Be-11 N exhibit a parity-inverted ground state compared to their neighbouring nuclei. Herein the Multi-Channel Algebraic Scattering (MCAS) method has been used to describe the low excitation spectra of those isobars in terms of nucleon-nucleus clusters. A collective model description of the low-excitation states of the mass-10 core nuclei has been used to form the coupled-channel interactions required in the method. For comparison, and to understand the underlying configurations, a shell model approach has been used to obtain those spectra with no-core (0 + 2 + 4) ω and (0 + 2) ω shell-model spaces for the mass 10 and mass 11 nuclei respectively.The results of the calculations suggest the need of a strong coupling in the collective coupled-channel vibrational model. In particular, the strong coupling of the collective 2 + 1 state of 10 Be to the valence neutron plays a decisive role in forming the positive parity ground state in 11 Be.

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“…As there is no specified set of 3pF parameters given, we considered a range of values for them, since, as shown in Ref. [14], variation in the three parameters leads to minimal difference in results provided the rms charge radius is kept constant. The set used are listed in Table I. For 2 H, the rms charge radius has been determined [15] to be 2.13 fm.…”

Section: Charge Distributions For the Nuclei And The Coulomb Intmentioning

confidence: 99%

Effective two-body model for spectra of clusters of H2,H3,
Fraser
¹
,
Massen-Hane
²
,
Kadyrov
³

et al. 2017
Phys. Rev. C

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Four light-mass nuclei are considered by an effective two-body clusterisation method; 7 Li as 3 H+ 4 He, 7 Be as 3 He+ 4 He, 8 Be as 4 He+ 4 He, and 6 Li as 2 H+ 4 He. The low-energy spectra of the former three are determined from single-channel Lippmann-Schwinger equations. For the latter, two uncoupled sets of equations are considered; those involving the 3 S 1 and those of the posited 1 S 0 states of 2 H. Low-energy elastic scattering cross sections are calculated from the same 2 H+ 4 He Hamiltonian, for many angles and energies for which data are available. While some of these systems may be more fully described by many-body theories, this work establishes that a large amount of data may be explained by these two-body clusterisations.

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Structure of²³Al from a multi-channel algebraic scattering model based on mirror symmetry

Cited by 10 publications

References 37 publications

Mass-15 nuclei and predicting narrow states beyond the proton drip line

Mass-15 nuclei and predicting narrow states beyond the proton drip line

Coupled-channel description for mirror mass-11 nuclei compared to shell-model structures

Effective two-body model for spectra of clusters of H2,H3,
Fraser
¹
,
Massen-Hane
²
,
Kadyrov
³

et al. 2017
Phys. Rev. C

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Structure of23Al from a multi-channel algebraic scattering model based on mirror symmetry

Cited by 10 publications

References 37 publications

Mass-15 nuclei and predicting narrow states beyond the proton drip line

Mass-15 nuclei and predicting narrow states beyond the proton drip line

Coupled-channel description for mirror mass-11 nuclei compared to shell-model structures

Effective two-body model for spectra of clusters of H2,H3,Fraser1, Massen-Hane2, Kadyrov3 et al. 2017Phys. Rev. C

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Structure of²³Al from a multi-channel algebraic scattering model based on mirror symmetry

Effective two-body model for spectra of clusters of H2,H3,
Fraser
¹
,
Massen-Hane
²
,
Kadyrov
³

et al. 2017
Phys. Rev. C