Partial escape widths of giant resonances

Muraviev, S.; Urin, M. H.

doi:10.1016/0375-9474(94)90175-9

Cited by 19 publications

(33 citation statements)

References 23 publications

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“…The spectral decompositions for the other elements ofÃ can readily be written down in analogy to Eqs. (9). Thus, one sees from Eqs.…”

Section: It Satisfies An Integral Equation Of the Bethe-salpeter Typeãmentioning

confidence: 93%

“…Their contribution to the nuclear multipole response is marked if probe operators have nontrivial radial dependence, which is the case, for example, for muon capture [10] and neutrino-nucleus reactions with large momentum transfer [11]. The direct nucleon decay of various giant resonances and their overtones has been extensively analyzed within the cRPA by Urin and collaborators (see, e.g., [9]). …”

Section: Continuum Qrpamentioning

confidence: 99%

“…continuum is provided within the continuum quasiparticle random phase approximation (cQRPA). The continuum random phase approximation (cRPA) was formulated about 30 years ago in the pioneering work of Shlomo and Bertsch [8] and since then has been used to successfully describe structure and decay properties of various giant resonances [9], muon capture [10], and neutrino-nucleus reactions with large momentum transfer [11]. To apply the cRPA in open-shell nuclei one has to take nucleon pairing into consideration.…”

Section: Introductionmentioning

confidence: 99%

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Description of double β decay within the continuum quasiparticle random-phase approximation

Rodin

Faessler

2008

Phys. Rev. C

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A method to calculate the nuclear double beta decay (2νββ and 0νββ) amplitudes within the continuum quasiparticle random phase approximation (cQRPA) is formulated. Calculations of the ββ transition amplitudes within the cQRPA are performed for 76 Ge, 100 Mo and 130 Te. A rather simple nuclear Hamiltonian consisting of a phenomenological mean field and a zero-range residual particle-hole and particle-particle interaction is used. The calculated 2νββ amplitudes are almost unaffected when the single-particle continuum is taken into account, whereas we find a regular suppression of the 0νββ amplitudes that can be associated with additional ground-state correlations owing to collective states in the continuum. It is expected that inclusion of nucleon pairing in the single-particle continuum will somewhat compensate this suppression.

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“…The spectral decompositions for the other elements ofÃ can readily be written down in analogy to Eqs. (9). Thus, one sees from Eqs.…”

Section: It Satisfies An Integral Equation Of the Bethe-salpeter Typeãmentioning

confidence: 93%

Section: Continuum Qrpamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Description of double β decay within the continuum quasiparticle random-phase approximation

Rodin

Faessler

2008

Phys. Rev. C

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“…A number of macroscopical, semiclassical and microscopical approaches have been used to describe the photoabsorption cross section, the latter being proportional to the energy-weighted isovector dipole strength function [1]. CRPA-based microscopical approaches have been developed during the last two decades to describe the E1 strength function [2]- [5]. However, partial photonucleon reactions accompanied by the GDR excitation have not been studied in these approaches.…”

Section: Introductionmentioning

confidence: 99%

Semimicroscopical description of the simplest photonuclear reactions accompanied by excitation of the giant dipole resonance in medium-heavy mass nuclei

Rodin

Urin

2002

Phys. Rev. C

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A semimicroscopical approach is applied to describe photoabsorption and partial photonucleon reactions accompanied by the excitation of the giant dipole resonance (GDR). The approach is based on the continuum-RPA (CRPA) with a phenomenological description for the spreading effect. The phenomenological isoscalar part of the nuclear mean field, momentum-independent Landau-Migdal particle-hole interaction, and separable momentum-dependent forces are used as input quantities for the CRPA calculations. The experimental photoabsorption and partial (n, γ)-reaction cross sections in the vicinity of the GDR are satisfactorily described for 89 Y, 140 Ce and 208 Pb target nuclei. The total direct-neutron-decay branching ratio for the GDR in 48 Ca and 208 Pb is also evaluated.

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“…the GDR within a continuum-RPA CRPA approach w x have been given in Ref. 3,4 . However, partial photonucleon reactions were not considered in these works.…”

Section: Introductionmentioning

confidence: 99%