The nuclear spin response to intermediate energy protons and deuterons at low momentum transfer

Baker, F. T.; Bimbot, L.; Djalali, C.; Glashausser, C.; Lenske, H.; Love, W.G.; Morlet, M.; Tomasi–Gustafsson, E.; Wiele, J. Van de; Wambach, J.; Willis, A.

doi:10.1016/s0370-1573(97)00008-2

Cited by 54 publications

(43 citation statements)

References 69 publications

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“…Besides discrete transitions at low excitation energies, a resonance-like struc- These findings are consistent with the results in 208 Pb [29] and 120 Sn [32]. The ∆S = 1 strength observed at high E x can be understood to arise from quasi-free scattering [42]. Alternatively, a multipole decomposition analysis (MDA) was performed for angular distributions of the cross sections in the PDR and GDR regions.…”

supporting

confidence: 80%

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

et al. 2017

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The gamma strength function and level density of 1^{-} states in ^{96}Mo have been extracted from a high-resolution study of the (p[over →], p[over →]^{'}) reaction at 295 MeV and extreme forward angles. By comparison with compound nucleus γ decay experiments, this allows a test of the generalized Brink-Axel hypothesis in the energy region of the pygmy dipole resonance. The Brink-Axel hypothesis is commonly assumed in astrophysical reaction network calculations and states that the gamma strength function in nuclei is independent of the structure of the initial and final state. The present results validate the Brink-Axel hypothesis for ^{96}Mo and provide independent confirmation of the methods used to separate gamma strength function and level density in γ decay experiments.

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confidence: 80%

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

et al. 2017

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“…The dominant quadrupole nature of the bump on top of a smooth quasifree background [25] has been demonstrated by multipole decompositions of angular distributions measured in alpha [26] and proton [16] scattering. Properties of the ISGQR have also been investigated with electromagnetic probes [5,27] and capture experiments [28].…”

Section: Methodsmentioning

confidence: 97%

Fine structure of the isoscalar giant quadrupole resonance in 40Ca due to Landau damping?

et al. 2011

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The fragmentation of the Isoscalar Giant Quadrupole Resonance (ISGQR) in 40 Ca has been investigated in high energy-resolution experiments using proton inelastic scattering at E p = 200 MeV. Fine structure is observed in the region of the ISGQR and its characteristic energy scales are extracted from the experimental data by means of a wavelet analysis. The experimental scales are well described by Random Phase Approximation (RPA) and second-RPA calculations with an effective interaction derived from a realistic nucleon-nucleon interaction by the Unitary Correlation Operator Method (UCOM). In these results characteristic scales are already present at the mean-field level pointing to their origination in Landau damping, in contrast to the findings in heavier nuclei and also to SRPA calculations for 40 Ca based on phenomenological effective interactions, where fine structure is explained by the coupling to two-particle two-hole (2p-2h) states.

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“…Recently Orsay group has developed a DWIA model [1] using the double folding method to calculate the deuteron inelastic scattering at intermediate energies. In previous applications [1,2], the deuteron-nucleus (dA) transition matrix was calculated, first by folding the on-shell NN t-matrix with the deuteron wave function to yield the deuteron-nucleon (dN) t-matrix, then by folding it with the target transition density. In a comparison between model predictions and data, however, it was found that the d+N elastic differential cross sections were overestimated by the first folding, leading to too large dA cross sections by factors of 1.2-2.0 [2].…”

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confidence: 99%

Three-body dN interaction in the analysis of the 12C(,d′) reaction at 270 MeV

et al. 2002

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We have measured the cross sections and analyzing powers A y and A yy for the elastic and inelastic scattering of deuterons from the 0 + (g.s.), 2 + (4.44 MeV), 3 − (9.64 MeV), 1 + (12.71 MeV), and 2 − (18.3 MeV) states in 12 C at an incident energy of 270MeV. The data are compared with microscopic distorted-wave impulse approximation calculations where the projectile-nucleon effective interaction is taken from the three-nucleon t-matrix given by rigorous Faddeev calculations presently available at intermediate energies. The agreement between theory and data compares well with that for the (p, p ′ ) reactions at comparable incident energies/nucleon.Light-ion-induced inelastic scattering at bombarding energies above 100 MeV/nucleon is an appealing probe of nuclear structure due to the simple reaction mechanism. In such an energy domain, the reaction proceeds predominantly through a single step, and the distorted-wave impulse approximation (DWIA) gives a reasonable starting point for the theoretical description of data. In the IA for

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The nuclear spin response to intermediate energy protons and deuterons at low momentum transfer

Cited by 54 publications

References 69 publications

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

Fine structure of the isoscalar giant quadrupole resonance in 40Ca due to Landau damping?

Three-body dN interaction in the analysis of the 12C(,d′) reaction at 270 MeV

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