Spectroscopic factor strengths using 
<i>ab initio</i>
 approaches

Srivastava, P. C.; Kumar, Vikas

doi:10.1103/physrevc.94.064306

Cited by 13 publications

(28 citation statements)

References 42 publications

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“…This comes from the fact that the B(GT ) value for the transition from the g.s. of 23 Na to the g.s. of 23 Ne is close to the experimental value in case of IM-SRG, while it is smaller (larger) in case of USDB (CCEI).…”

Section: N Centroid Energiesmentioning

confidence: 94%

“…of 23 Na to the g.s. of 23 Ne is close to the experimental value in case of IM-SRG, while it is smaller (larger) in case of USDB (CCEI). Both IM-SRG and CCEI give larger B(GT ) than USDB and the experiment for E x = 0.5-3.5 MeV.…”

Section: N Centroid Energiesmentioning

confidence: 94%

“…Final β−decay (n,p) (d, 2 He) (t, 3 He) ( 3 He,t) (p,n) CCEI IM-SRG USDB Ref. In order to describe the measured GT strength distribution in sd shell nuclei, we have performed shell model calculations with two modern ab initio approaches: The in-medium similarity renormalization group (IM-SRG) [19] and the coupled cluster effective interaction (CCEI) [22][23][24]. For comparison, we have also performed calculations with the phenomenological USDB effective interaction [25].…”

Section: Sno Initialmentioning

confidence: 99%

“…In Fig. 3 (a) the experimental data are shown up to the excitation energy 11.132 MeV of 23 Mg. In Ref.…”

Section: Comparison Of the Experimental And Theoretical Gt Strenmentioning

confidence: 99%

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Ab initio calculations of Gamow-Teller strengths in the sd shell

2018

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In the present work we perform a systematic shell model study of Gamow-Teller transition strength distributions in sd shell nuclei using ab initio effective interactions. The ab initio effective interactions are based on in-medium similarity renormalization group (IM-SRG) and coupled-cluster effective interaction (CCEI) approaches. The aim of the present work is to test the predictive power of ab initio effective interactions by using the available experimental data of Gamow-Teller strength distributions in sd shell nuclei. We perform calculations for P, 31 P → 31 Si, and 32 S → 32 P transitions. For comparison we also show the results obtained by using the phenomenological USDB Hamiltonian. The phenomenological USDB results of the Gamow-Teller (GT+/GT−) strength distributions show reasonable agreements with the experimental data in comparison to the ab initio interactions. We also calculate the electron capture reaction rates for 23 Na(e − , ν) 23 Ne and 25 Mg(e − , ν) 25 Na using ab initio and USDB interactions.

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Section: N Centroid Energiesmentioning

confidence: 94%

Section: N Centroid Energiesmentioning

confidence: 94%

Section: Sno Initialmentioning

confidence: 99%

“…In Fig. 3 (a) the experimental data are shown up to the excitation energy 11.132 MeV of 23 Mg. In Ref.…”

Section: Comparison Of the Experimental And Theoretical Gt Strenmentioning

confidence: 99%

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Ab initio calculations of Gamow-Teller strengths in the sd shell

2018

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“…[3]. Also ab initio coupled-cluster effective interaction (CCEI) was derived and used to calculate the levels in p and sd shell nuclei successfully [4][5][6]. A mass-dependent effective Hamiltonian in a 0 Ω model space for the sd shell nuclei, starting from a no core shell model Hamiltonian in a 4 Ω model space with the realistic J-matrix Inverse Scattering Potential, fitted to nuclei with masses up to A = 16 (JISP16) and chiral next-to-next-to-next-to leading order (N3LO) N N interactions, has been reported in Ref.…”

Section: Introductionmentioning

confidence: 99%

First-principles results for electromagnetic properties of $sd$ shell nuclei

Saxena,

Srivastava

2017

Preprint

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In this work we present ab initio shell-model calculations for electric quadrupole moments and magnetic dipole moments of sd shell nuclei using valence-space Hamiltonians derived with two ab initio approaches: the in-medium similarity renormalization group (IM-SRG) and the coupledcluster effective interaction (CCEI). Results are in a reasonable agreement with the available experimental data as well as with the results from the phenomenological USDB effective interaction. This work will add more information to the available ab initio results for the spectroscopy of sd shell nuclei.

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Ab initio description of collectivity for sd shell nuclei

Saxena

Kumar

et al. 2019

Hyperfine Interact

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In the present work, we have reported shell model results for open shell nuclei Ne, Mg and Si isotopes with 10 ≤ N ≤ 20 in sd-shell model space. We have performed calculations in sd shell with two ab initio approaches: in-medium similarity renormalization group (IM-SRG) and coupledcluster (CC) theory. We have also performed calculations with phenomenological USDB interaction and chiral effective field theory based CEFT interaction. The results for rotational spectra and B(E2; 2 + 1 → 0 + 1 ) transitions are reported for even-mass isotopes. The IM-SRG and CC results are in reasonable agreement with the experimental data except at N =20. This demonstrates a validity of ab initio description of deformation for doubly open-shell nuclei for sd shell. To see the importance of pf orbitals, we have also compared our results with SDPF-MU interaction by taking account of 2p − 2h and 4p − 4h configurations in sd-pf -shell model space.

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Spectroscopic factor strengths using ab initio approaches

Cited by 13 publications

References 42 publications

Ab initio calculations of Gamow-Teller strengths in the sd shell

Ab initio calculations of Gamow-Teller strengths in the sd shell

First-principles results for electromagnetic properties of $sd$ shell nuclei

Ab initio description of collectivity for sd shell nuclei

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