The Nuclear Response Function

Bertsch, G. F.

doi:10.1143/ptps.74.115

Cited by 29 publications

(20 citation statements)

References 6 publications

(5 reference statements)

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“…As 6'a increases with Z like Z 2 and also increases with the energy w, whereas 6' increases only like Z and decreases with w, the extraction of 6'(w) from 6't (w) becomes more and more difficult with increasing Z and (1). As can be seen from Fig.…”

Section: Dipole Casementioning

confidence: 80%

Recent Developments in the Description of Electric Giant Resonances

Bohigas¹

1983

Prog. Theor. Phys. Suppl.

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The experimental situation concerning electric isovector dipole and iso· scalar monopole strengths is reviewed. When describing the giant resonance region, emphasis is put on selfconsistent RPA theories. The role of the effective interaction is examined. The photoabsorption cross-section in the region 40"-' 140 MeV is also discussed as well as evaluations of the dipole enhancement factor. § l. lntrod uction It is well known that atomic nuclei show collective properties. One important aspect of collective motion is the concentration in energy of excitation strength. This is best illustrated by the nuclear photoeffect which has the following two main characteristics: i) The photoabsorption cross-section shows, all over the periodic table, a broad peak that takes a large part of the integrated photo cross-section. ii) The variation of the peak energy is a smooth function of the mass number A. Two main routes can be followed in order to describe the strength function S (E) S(E) =I:: J(nJQJO)J 2 o(E-E,.);(1) " m Eq. (1) Q is the excitation operator, En are excitation energies corresponding to the n-th excited state In) and JO) is the ground state. In the more detailed route the strength function S(E) is calculated at each energy E.D. 2 > A more global approach can be followed, in which only some energy moments mk (or sum-rules) of the strength function S(E) are computed,s>-5 > the k-th

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Section: Dipole Casementioning

confidence: 80%

Recent Developments in the Description of Electric Giant Resonances

Bohigas¹

1983

Prog. Theor. Phys. Suppl.

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“…Having determined the parameters of the nucleon-« interaction, we calculated the cross sections of inelastically scattered «-particles for the case of E0T0 and E1T0 excitations of target nuclei using the transition potential (15) and both the RPA transition densities and the collective model transition densities obtained using the Hartree-Fock ground state density and eqs (16) and (17). These transition densities were calculated for each energy value on the 0.2 MeV grid.…”

Section: Dwba Calculations Of Excitation Cross Sectionmentioning

confidence: 99%

Compression modes and the nuclear matter incompressibility coefficient

Shlomo

2001

Pramana - J Phys

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We review the current status of the nuclear matter (AE and no Coulomb interaction) incompressibility coefficient, ÃÒÑ, and describe the theoretical and the experimental methods used to determine ÃÒÑ from properties of compression modes in nuclei. In particular we consider the long standing problem of the conflicting results obtained for ÃÒÑ, deduced from experimental data on excitation cross sections for the isoscalar giant monopole resonance (ISGMR) and data for the isoscalar giant dipole resonance (ISGDR).

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“…We define "a doorway state" by Ia>) which is expressed as a superposition of nuclear states excited by an external field, f(r), with the weight of the excitation strength, la>)=N~ ln)(nl ~f(r,. )IO), (10) " k N being the normalization factor, 322 T. Suzuki…”

Section: Nuclear Velocity Fieldmentioning

confidence: 99%

Sum Rule Approach to Giant Resonance States

Suzuki

1983

Prog. Theor. Phys. Suppl.

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On the basis of sum rules for the nuclear four-current, structure of isoscalar giant resonance states is discussed. A qualitative argument on spinisospin-dependent excitations of nuclei is also provided with the aid of sum rules in the quark model. § 2. Sum rules for the nuclear four-current Let us consider the sum, at East Tennessee State University on June 22, 2015 http://ptps.oxfordjournals.org/ Downloaded from at East Tennessee State University on June 22, 2015 http://ptps.oxfordjournals.org/ Downloaded from

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The Nuclear Response Function

Cited by 29 publications

References 6 publications

Recent Developments in the Description of Electric Giant Resonances

Recent Developments in the Description of Electric Giant Resonances

Compression modes and the nuclear matter incompressibility coefficient

Sum Rule Approach to Giant Resonance States

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