Effect of ground-state deformation on isoscalar giant resonances in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Si</mml:mi><mml:mprescripts /><mml:none /><mml:mn>28</mml:mn></mml:mmultiscripts></mml:math>

Peach, Tomas; Garg, U.; Gupta, Y. K.; Hoffman, Jacob B.; Matta, J. T.; Patel, D.; Rao, P. V. Madhusudhana; Yoshida, Kenichi; Itoh, Masatoshi; Fujiwara, M̄.; Hara, K.; Hashimoto, H.; Nakanishi, K.; Yosoi, M.; Sakaguchi, H.; Terashima, S.; Kishi, S.; Murakami, T.; Uchida, M.; Yasuda, Yusuke; Akimune, H.; Kawabata, T.; Harakeh, Mohsen; Colò, G.

doi:10.1103/physrevc.93.064325

Cited by 34 publications

(132 citation statements)

References 64 publications

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“…4 Keeping in mind an independent particle picture where nucleons are bound by an average one-body potential. Excitation Energy (MeV) 208 Pb(p,p') 208 Pb(γ,xn) 208 48 Ca(γ, abs) SENDAI (1987) 48 Ca(e,e'n) S-DALINAC (2000) 48 Ca(p,p') RCNP (2016) Figure 4: Left panel: photoabsorption cross section at forward angles (proportional to the strength function in good approximation corresponding to the IVGDR) in 208 Pb as measured in different experiments. Figure taken from Ref.…”

Section: Nuclear Response To Small Perturbationsmentioning

confidence: 99%

Nuclear equation of state from ground and collective excited state properties of nuclei

Roca-Maza

Paar

2018

Progress in Particle and Nuclear Physics

194

110

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This contribution reviews the present status on the available constraints to the nuclear equation of state (EoS) around saturation density from nuclear structure calculations on ground and collective excited state properties of atomic nuclei. It concentrates on predictions based on self-consistent mean-field calculations, which can be considered as an approximate realization of an exact energy density functional (EDF). EDFs are derived from effective interactions commonly fitted to nuclear masses, charge radii and, in many cases, also to pseudo-data such as nuclear matter properties. Although in a model dependent way, EDFs constitute nowadays a unique tool to reliably and consistently access bulk ground state and collective excited state properties of atomic nuclei along the nuclear chart as well as the EoS. For comparison, some emphasis is also given to the results obtained with the so called ab initio approaches that aim at describing the nuclear EoS based on interactions fitted to few-body data only. Bridging the existent gap between these two frameworks will be essential since it may allow to improve our understanding on the diverse phenomenology observed in nuclei. Examples on observations from astrophysical objects and processes sensitive to the nuclear EoS are also briefly discussed. As the main conclusion, the isospin dependence of the nuclear EoS around saturation density and, to a lesser extent, the nuclear matter incompressibility remain to be accurately determined. Experimental and theoretical efforts in finding and measuring observables specially sensitive to the EoS properties are of paramount importance, not only for low-energy nuclear physics but also for nuclear astrophysics applications. 7 The expression introduced by Migdal in Ref. [43] neglected the term in a AS . 8 From a macroscopic picture it would correspond to an isotropic compression. 9 From a macroscopic picture it would correspond to a non-isotropic compression. 15

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Section: Nuclear Response To Small Perturbationsmentioning

confidence: 99%

Nuclear equation of state from ground and collective excited state properties of nuclei

Roca-Maza

Paar

2018

Progress in Particle and Nuclear Physics

194

110

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“…The parameter value of β = −1.9 was proposed in Ref. [40], and widely used for the analysis of inelastic alpha scattering [2,[4][5][6][7][8][9][10]13,20,25,28,29]. On the other hand, the parameter value of β = 0.0 means that the interaction is independent of the density of the target nucleus.…”

Section: A Optical-model Potential For the Elastic α Scattering And mentioning

confidence: 99%

“…Isoscalar giant monopole resonances (ISGMRs) and isoscalar giant dipole resonances (ISGDR) are extensively examined by the MDA for the inelastic α scattering [1][2][3][4][5][6][7][8][9][10]. The ISGMR and ISGDR strength distributions were successfully extracted from continuous excitation-energy spectra by the MDA.…”

Section: Introductionmentioning

confidence: 99%

“…As described above, measurements of isoscalar naturalparity transition strengths by means of inelastic α scattering are widely performed [1][2][3][4][5][6][7][8][9][10]13,25,[27][28][29], assuming the linear proportional relation between the cross sections and the square of the transition matrix elements. However, a contradictory result to the linear proportional relation was reported in the monopole excitation to the Hoyle state from the ground state in 12 C. The isoscalar monopole strength determined from the inelastic electron scattering exhausts about 15% of the energy-weighted sum-rule (EWSR) strength [24,30], but that from the inelastic α scattering exhausts as small as 7.6% [27].…”

Section: Introductionmentioning

confidence: 99%

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Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei

Adachi¹,

Kawabata

Minomo

et al. 2018

Phys. Rev. C

Self Cite

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We systematically measured the differential cross sections of inelastic α scattering off self-conjugate A = 4n nuclei at two incident energies E α = 130 MeV and 386 MeV at Research Center for Nuclear Physics, Osaka University. The measured cross sections were analyzed by the distorted-wave Born-approximation (DWBA) calculation using the single-folding potentials, which are obtained by folding macroscopic transition densities with the phenomenological αN interaction. The DWBA calculation with the density-dependent αN interaction systematically overestimates the cross sections for the ΔL = 0 transitions. However, the DWBA calculation using the density-independent αN interaction reasonably well describes all the transitions with ΔL = 0-4. We examined uncertainties in the present DWBA calculation stemming from the macroscopic transition densities, distorting potentials, phenomenological αN interaction, and coupled channel effects in 12 C. It was found that the DWBA calculation is not sensitive to details of the transition densities nor the distorting potentials, and the phenomenological density-independent αN interaction gives reasonable results. The coupled-channel effects are negligibly small for the 2 + 1 and 3 − 1 states in 12 C, but not for the 0 + 2 state. However, the DWBA calculation using the density-independent interaction at E α = 386 MeV is still reasonable even for the 0 + 2 state. We concluded that the macroscopic DWBA calculations using the density-independent interaction are reliably applicable to the analysis of inelastic α scattering at E α ∼ 100 MeV/u.

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“…Recently, interesting and promising experimental data were reported by the measurement of 28 Si(α,α ) 28 Si * inelastic scattering [57,58]. It was found that a couple of 0 + states above 9 MeV are strongly populated and were deduced to have large IS monopole transition strengths.…”

Section: M(i S0mentioning

confidence: 99%

Inversion doublets of reflection-asymmetric clustering in Si28 and their isoscalar monopole and dipole transitions

2017

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Background: Various cluster states of astrophysical interest are expected to exist in the excited states of 28 Si. However, they have not been identified firmly, because of the experimental and theoretical difficulties. Purpose: To establish the 24 Mg + α, 16 O + 12 C, and 20 Ne + 2α cluster bands, we theoretically search for the negative-parity cluster bands that are paired with the positive-parity bands to constitute the inversion doublets. We also offer the isoscalar monopole and dipole transitions as a promising probe for the clustering. We numerically show that these transition strengths from the ground state to the cluster states are very much enhanced.

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Effect of ground-state deformation on isoscalar giant resonances inSi28

Cited by 34 publications

References 64 publications

Nuclear equation of state from ground and collective excited state properties of nuclei

Nuclear equation of state from ground and collective excited state properties of nuclei

Systematic analysis of inelastic α scattering off self-conjugate A=4n nuclei

Inversion doublets of reflection-asymmetric clustering in Si28 and their isoscalar monopole and dipole transitions

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