<i>Ab initio</i>
 no-core shell model study of 
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 isotopes with realistic 
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 interactions

Choudhary, Priyanka; Srivastava, P. C.; Navrátil, Petr

doi:10.1103/physrevc.102.044309

Cited by 23 publications

(11 citation statements)

References 82 publications

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“…The Titled-Axis Cranking model [26] results for the Be isotopes [27] may support this kind of argument. It is also interesting to point out that a recent ab initio no-core shell model study [28] of [10][11][12][13][14] B isotopes with realistic N N forces predicts Q 3/2 − in the range 0.027 -0.031 eb (depending on the interaction used), very close to our estimate.…”

Section: The Ground State Of 12 Bsupporting

confidence: 86%

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Coriolis coupling effects in proton-pickup spectroscopic factors from $^{12}$B

Macchiavelli,

Crawford,

Clark

et al. 2020

Preprint

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Spectroscopic factors to low-lying negative-parity states in 11 Be extracted from the 12 B(d, 3 He) 11 Be proton-removal reaction are interpreted within the rotational model. Earlier predictions of the p-wave proton removal strengths in the strong coupling limit of the Nilsson model underestimated the spectroscopic factors to the 3/2 − 1 and 5/2 − 1 states and suggested that deviations in the 1 + ground state of the odd-odd 12 B due to Coriolis coupling should be further explored. In this work we use the Particle Rotor Model to take into account these effects and obtain a good description of the level scheme in 11 B, with a moderate K-mixing of the proton Nilsson levels [110]1/2 and [101]3/2. This mixing, present in the 1 + bandhead of 12 B, is key to explaining the proton pickup data.

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Section: The Ground State Of 12 Bsupporting

confidence: 86%

“…It would be of interest if the study of Ref. [28] could be extended to obtain spectroscopic factors for the reactions in Table II.…”

Section: Spectroscopic Factorsmentioning

confidence: 99%

Coriolis coupling effects in proton-pickup spectroscopic factors from $^{12}$B

Macchiavelli,

Crawford,

Clark

et al. 2020

Preprint

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“…While a 1 + ground state is favored in such a model, as is suggested by the dominant configurations involving the 0 p 1/2 orbit in each wave function, the small excitation energy of the 3 + state encourages the idea that a small change in the shell-model interaction matrix elements could invert the levels for the 3 + to be the ground state. This problem has also been considered using other shell models, such as by those classified as ab initio [18,19]. Both of these studies consider very large basis spaces but do not account for all possible states contained therein.…”

Section: Mass 10 Isobarsmentioning

confidence: 99%

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

et al. 2022

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The spectra of mass-11 nuclei are unusual, and so pose a challenge for nuclear-structure theory. Relating to nucleon emission, the set of isobars range from being well-bound ($$^{11}$$ 11 B,$$^{11}$$ 11 C) through weakly bound ($$^{11}$$ 11 Li, $$^{11}$$ 11 Be), to being proton unstable ($$^{11}$$ 11 N,$$^{11}$$ 11 O). To add complexity, the weakly bound $$^{11}$$ 11 Li takes the form of a two-nucleon halo nucleus. A self-consistent approach to understand this set of nuclei is especially important as the mirror pair $$^{11}$$ 11 Be-$$^{11}$$ 11 N exhibit a parity-inverted ground state compared to their neighboring nuclei. Herein, the Multi-Channel Algebraic Scattering method (MCAS) 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 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 $$(0+2+4)\hbar \omega $$ ( 0 + 2 + 4 ) ħ ω and $$(0+2)\hbar \omega $$ ( 0 + 2 ) ħ 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 $$2^+_1$$ 2 1 + state of $$^{10}$$ 10 Be to the valence neutron plays a decisive role in forming the positive parity ground state in $$^{11}$$ 11 Be; an effect confirmed by the shell-model results.

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“…Over the last few years nuclear structure study of pand lower sd-shell nuclei within the framework of ab initio no-core shell model (NCSM) approach has achieved a great amount of success [1][2][3][4][5][6][7][8][9][10][11][12][13]. In the NCSM calculations, all the constituents of a nucleus are considered to be active particles.…”

Section: Introductionmentioning

confidence: 99%

Ab initio description of Si, P, S, Cl and Ar isotopes in sd-shell

Choudhary¹,

Srivastava²

2022

Preprint

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In the present work, we have reported comprehensive study of the sd-shell nuclei in the range Z = 14 − 18 with neutron number varying from N = 9 to N = 20 using the microscopic effective valence shell interactions. These effective sd-shell interactions are developed using the ab initio nocore shell model wave functions and the Okubo-Lee-Suzuki transformation method. The valence shell effective interactions, which are used in this project, are N3LO, JISP16 and DJ16A interactions. For comparison, we have also performed shell model calculations with the empirical USDB interaction. Theoretically calculated shell model results are compared with the experimental data, to check the predictive strength of the microscopic interactions. It is found that the binding energies of the ground states are better reproduced with the DJ16A interaction as compared to other microscopic interactions. Spin-tensor decomposition of two-body interaction is presented to understand the contributions from central, vector and tensor components into these interactions. Electromagnetic properties of these isotopic chains have been studied. Spectroscopic strengths of 23 Al(d,n) 24 Si are calculated for the newly performed experiment at NSCL. The beta-decay properties of 32 Ar are also determined for recently available experimental data.

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Ab initio no-core shell model study of B10–14 isotopes with realistic NN interactions

Cited by 23 publications

References 82 publications

Coriolis coupling effects in proton-pickup spectroscopic factors from $^{12}$B

Coriolis coupling effects in proton-pickup spectroscopic factors from $^{12}$B

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

Ab initio description of Si, P, S, Cl and Ar isotopes in sd-shell

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