Isoscalar giant resonance strengths in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow/><mml:mn>32</mml:mn></mml:msup></mml:math>S and possible excitation of superdeformed and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow/><mml:mn>28</mml:mn></mml:msup></mml:math>Si<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:math><mml:math xmlns:mml="http://w

Itoh, Masatoshi; Kishi, S.; Sakaguchi, H.; Akimune, H.; Fujiwara, M̄.; Garg, U.; Hara, K.; Hashimoto, H.; Hoffman, Jacob B.; Kawabata, T.; Kawase, K.; Murakami, T.; Nakanishi, K.; Nayak, B. K.; Terashima, S.; Uchida, M.; Yasuda, Yusuke; Yosoi, M.

doi:10.1103/physrevc.88.064313

Cited by 31 publications

(26 citation statements)

References 40 publications

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“…7. The sum of these components in the energy region [15][16][17][18][19][20][21][22][23][24][25] MeV is in reasonable agreement with the data. Again, comparison of data with the spherical and deformed ground-state microscopic calculations clearly indicates that ISGQR strength fragmentation in 24 Mg corresponds to a prolate-deformed ground state.…”

Section: Discussionsupporting

confidence: 78%

“…These are understood in terms of K-splitting: microscopic calculations based on quasiparticle random-phase approximation (QRPA) [11], for example, predict K-splitting of the multipole strength even in light deformed nuclei such as 24 Mg [12,13]. Identification of full giant-resonance strengths in the lighter-mass nuclei (A < 60) has generally been a chal-lenge due to fragmentation of the strength [14][15][16][17][18][19][20][21][22], significant overlap of giant resonance strengths for L ≤2, uncertainties in the extraction of the strength distributions, and overlap of the multipole strength with other direct processes (knock-out/quasi-free processes, for example). The light nuclei, in particular the deformed ones such as 24 Mg and 28 Si, provide a vital testing ground for the aforementioned QRPA and deformed Hartree-FockBogoliubov (HFB) calculations [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Deformation effects on isoscalar giant resonances inMg24

et al. 2016

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Strength distributions for isoscalar giant resonances with multipolarity L ≤2 have been determined in 24 Mg from "instrumental background-free" inelastic scattering of 386-MeV α particles at extremely forward angles, including 0• . The isoscalar E0, E1, and E2 strengths are observed to be 57±7%, 111.1 +10.9 −7.2 %, and 148.6±7.3%, respectively, of their energy-weighted sum rules in the excitation energy range of 6 to 35 MeV. The isoscalar giant monopole (ISGMR) and quadrupole (ISGQR) resonances exhibit a prominent K-splitting which is consistent with microscopic theory for a prolate-deformed ground state of 24 Mg. For the ISGQR it is due to splitting of the three K components, whereas for the ISGMR it is due to its coupling to the K=0 component of the ISGQR. Deformation effects on the isoscalar giant dipole resonance are less pronounced, however.

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Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Deformation effects on isoscalar giant resonances inMg24

et al. 2016

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“…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%

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

Adachi¹,

Kawabata

Minomo

et al. 2018

Phys. Rev. C

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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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“…Furthermore, its strength distributions measured for light nuclei [4][5][6]10,11,13,35,36] show the existence of the sharp resonances with enhanced strengths at relatively small excitation energies well below the giant resonance. In a recent experimental study [35], the observed low-lying resonances in 32 S are conjectured to be the α + 28 Si cluster states, because of their enhanced IS dipole transition strength from the ground state. Very recently, Kanada-En'yo also discussed the enhancement of the IS dipole transition strength of the α cluster states in 12 C based on a theoretical calculation [56].…”

Section: Introductionmentioning

confidence: 99%

“…This finding boosted the studies of the cluster states by using the monopole transition as a probe. In these days, various cluster states in stable and unstable nuclei [33][34][35][36][37][38][39][40] are discussed on the basis of their enhanced monopole strengths.…”

Section: Introductionmentioning

confidence: 99%