Elastic and inelastic scattering of 240-MeV<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Li</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>6</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>ions from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ca</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>40</mml:mn></mml:mrow></mml:mmultiscripts><

Krishichayan,; Chen, X.; Lui, Y.‐W.; Button, J.; Youngblood, D. H.

doi:10.1103/physrevc.81.044612

Cited by 18 publications

(8 citation statements)

References 46 publications

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“…The highest multipole included in the fits is E4, and the "E3 +E4" distribution shown in Figure 3 is the sum of all the multipoles L≥3. In addition to the experimental uncertainties indicated in the tables for the EWSR, a variation of optical parameters has been shown to change the DWBA cross-sections [24] by 10-15%.…”

Section: Discussionmentioning

confidence: 99%

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Isoscalar E0, E1 , and E2 strength in Ca

et al. 2017

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Isoscalar giant resonances in 44 Ca have been studied with inelastic scattering of 240 MeV α particles at small angles including 0°. A majority of the Energy Weighted Sum Rule was identified for E0 and E2 (≈70%), and nearly half was identified for E1. The strength distributions are compared with the predictions from Hartree-Fock based Random Phase Approximation calculations with the KDE0v1 Skyrme-type interaction. The GMR energy moments for 40,44,48 Ca increase with mass, contrary to what would be expected with a negative symmetry energy, K τ .

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Section: Discussionmentioning

confidence: 99%

“…[29], analysis of GMR data for Sn and Sm nuclei from 120 MeV inelastic α-scattering, along with data for 208 Pb and 24 Mg, resulted in a value for the symmetry term, K τ = -320±184 MeV.…”

Section: A E0 Strengthmentioning

confidence: 99%

Isoscalar E0, E1 , and E2 strength in Ca

et al. 2017

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“…The breakup of 6 Li has been found to play a crucial role in its reaction dynamics and exhibits an important effect even on elastic scattering. The effect of the breakup has been previously reported in many experimental and theoretical studies on the elastic scattering of 6 Li from many targets, one among them being 40 Ca [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Trache et al [19] studied the elastic scattering of the loosely bound p-shell nuclei, and the optical model (OM) parameters for the calculations were obtained from the density-dependent Jeukenne-Lejeune-Mahaux (JLM) nucleon-nucleon (NN) interaction of the double folding (DF) model calculations.…”

Section: Introductionmentioning

confidence: 89%

Detailed analysis for ⁶Li+⁴⁰Ca elastic scattering using different potentials

2021

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The available experimental differential cross-section data for the 6Li+40C nuclear system in the energy range of 20–240 MeV have been reanalyzed using the framework of the phenomenological optical model (OM), the semi-microscopic cluster folding optical model (CFOM), and the microscopic cluster folding model (CFM) motivated by the well-known cluster structure of 6Li. Reasonable fits to the experimental data have been obtained using OM, CFOM, and CFM over the entire energy range considered in this study. For the real cluster folding potential, the extracted average renormalization factors from CFM and CFOM calculations are 0.46 ± 0.14 and 0.56 ± 0.05, respectively. Due to the well-developed cluster structure of 6Li and the effect of its breakup on other reaction channels, the strength of the real cluster folding potentials was required to be reduced by ∼44%–54% in order to describe the experimental data.

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“…4 we display the cut-off variation of the binding energy B 3 excluding the 3BF term, i.e., with g 3 = 0 in the integral equations. In particular, due to the ambiguities regarding the precise nature of the (1,1) ΞN sub-system interactions between the different existing phenomenological analyses [25,35,[38][39][40][41][42][43][44][45][46][47][48][49], we consider here two representative scenarios with contrasting perspectives, either of which formally may generate an Efimov-like bound state emerging from the respective thresholds, as elucidated below:…”

Section: Resultsmentioning

confidence: 99%

“…All that one finds in the literature are a few scattered upper bounds for Ξ − p elastic and inelastic cross sections from emulsion experiments [38,39]. Thus, it is no surprise that different existing model analyses lead to substantially contrasting views regarding the nature of the ΞN potentials, ranging from moderately or weakly attractive [25,35,[38][39][40][41][42][43][44][45], even vanishing [46], to weakly repulsive [47].…”

Section: Introductionmentioning

confidence: 99%

Investigation of $Ξ^{-}nn$ ($S=-2$) Hypernucleus in Low-energy Pionless Halo Effective Theory

Meher,

Raha

2020

Preprint

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In the strangeness S = −2 sector, we study the Ξ − nn (I = 3/2, J P = 1/2 + ) three-body system using pionless halo effective field theory (EFT), which provides a systematic model independent framework for assessing the feasibility of light particle-stable three-body bound states, utilizing lowenergy universality. Here we take recourse to a simplistic speculation of the three-body system by eliminating the repulsive spin-singlet Ξ − n sub-system, while retaining the predominantly attractive (possibly bound) spin-triplet Ξ − n and the virtual bound spin-singlet nn sub-system. In particular, a qualitative leading order EFT investigation by introducing a sharp momentum (ultraviolet) cut-off parameter Λ c into the Faddeev-like coupled integral equations, indicates a discrete scaling behavior akin to a renormalization group limit cycle, thereby suggesting the formal existence of Efimov states in the unitary limit, as Λ c → ∞. Our subsequent non-asymptotic analysis indicates that the three-body binding energy B 3 is sensitively dependent on the cut-off without the inclusion of three-body contact interactions. Furthermore, our analysis reproduces several values of the binding energy B 3 ∼ 3−4 MeV, predicted in context of existing potential models, with the regulator Λ c in the range, ∼ 350 − 460 MeV. Finally, based on these model inputs for B 3 , a ballpark estimate of the three-body scattering length in the range, 2.6 − 4.9 fm, is naively constrained by our EFT analysis, ostensibly demonstrating the universal nature of three-body correlations that is likely to manifest themselves in a halo-bound Ξ − nn system.

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Elastic and inelastic scattering of 240-MeVLi6ions fromCa40<

Cited by 18 publications

References 46 publications

Isoscalar E0, E1 , and E2 strength in Ca

Isoscalar E0, E1 , and E2 strength in Ca

Detailed analysis for ⁶Li+⁴⁰Ca elastic scattering using different potentials

Investigation of $Ξ^{-}nn$ ($S=-2$) Hypernucleus in Low-energy Pionless Halo Effective Theory

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Elastic and inelastic scattering of 240-MeVLi6ions fromCa40<

Cited by 18 publications

References 46 publications

Isoscalar E0, E1 , and E2 strength in Ca

Isoscalar E0, E1 , and E2 strength in Ca

Detailed analysis for 6Li+40Ca elastic scattering using different potentials

Investigation of $Ξ^{-}nn$ ($S=-2$) Hypernucleus in Low-energy Pionless Halo Effective Theory

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Product

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Detailed analysis for ⁶Li+⁴⁰Ca elastic scattering using different potentials