A theoretical study of magnetic dipole transitions in 48Ca

Takayanagi, Kazuo; Shimizu, Kiyotaka; Arima, A.

doi:10.1016/0375-9474(88)90499-x

Cited by 66 publications

(27 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the applications of ERPA to the dipole and quadrupole excitations of 48 Ca and 40 Ca it was clarified that the ground state correlation effects should be included to explain the large fragmentation of the dipole and quadrupole strengths in doubly-magic nuclei. The ground-state correlation effects in magic nuclei have extensively been studied for spin-isospin modes [31,50,[66][67][68]. 40 Ca.…”

Section: Dipole and Quadrupole Excitations Of 40 Ca And 48 Camentioning

confidence: 99%

Applications of Time-Dependent Density-Matrix Approach

Tohyama

2020

Front. Phys.

View full text Add to dashboard Cite

The equations of motion for reduced density matrices form a coupled chain known as the Bogoliubov-Born-Green-Kirkwood-Yvon (BBGKY) hierarchy. To close the coupled chain at the two-body level, approximations for a three-body density matrix with one-body and two-body density matrices are needed. The time-dependent density-matrix theory (TDDM) assumes that the three-body density matrix is given by the antisymmetrized products of the one-body and two-body density matrices. In this review the truncation schemes of the BBGKY hierarchy beyond TDDM are discussed and a formulation for the study of excited states which is derived from the time-dependent approach is explained. The truncation schemes and the formulation for excited states are applied to the Lipkin model and the Hubbard model to corroborate their validity. Two realistic applications of the TDDM approaches are also presented. One is the dipole and quadrupole excitations of 40 Ca and 48 Ca and the other the fusion reactions of 16 O + 16 O.

show abstract

Section: Dipole and Quadrupole Excitations Of 40 Ca And 48 Camentioning

confidence: 99%

Applications of Time-Dependent Density-Matrix Approach

Tohyama

2020

Front. Phys.

View full text Add to dashboard Cite

show abstract

“…Its [ν1f −1 7/2 1f 5/2 ] particle-hole structure is particularly simple allowing to investigate the role of second-order effects (see, e.g., ref. [235] and references therein). Furthermore, shellmodel calculations including the f pg valence space are possible providing all correlations due to the one-body interaction.…”

Section: Quenching Of the Isovector Strengthmentioning

confidence: 99%

Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0°

Neumann-Cosel

Tamii

2019

Eur. Phys. J. A

View full text Add to dashboard Cite

Inelastic proton scattering under extreme forward angles including 0 • and at energies of a few hundred MeV has been established as a new spectroscopic tool for the study of complete dipole strength distributions in nuclei. Such data allow an extraction of the electric dipole polarizability which provides important constraints for parameters of the symmetry energy, which determine the neutron-skin thickness and the equation of state (EOS) of neutron-rich matter. Also, new insight into the much-debated nature of the pygmy dipole resonance (PDR) is obtained. Additionally, the isovector spin-M1 resonance can be studied in heavy nuclei, where only limited experimental information exists so far. Together with much improved results on the isoscalar spin-M1 strength distributions in N = Z nuclei, these data shed new light on the phenomenon of quenching of the nuclear spin response. Using dispersion matching techniques, high energy resolution (∆E/E ≤ 10 −4 full width at half maximum, FWHM) can be achieved in the experiments. In spherical-vibrational nuclei considerable fine structure is observed in the energy region of the isovector giant dipole resonance (IVGDR). A quantitative analysis of the fine structure with wavelet methods provides information on the role of different damping mechanisms contributing to the width of the IVGDR. Furthermore, level densities can be extracted from a fluctuation analysis at excitation energies well above neutron threshold, a region hardly accessible by other means. The combination of the gamma strength function (GSF) extracted from the E1 and M1 strength distributions with the independently derived level density permits novel tests of the Brink-Axel hypothesis underlying all calculations of statistical model reaction cross sections in astrophysical applications in the energy region of the PDR.

show abstract

“…24͒ or the extended RPA. 25 5. ͑Color online͒ Pair-correlation functions g(r) and g ↑↓ (r) for r s ϭ1,5, and 10. The unit of length is a which is defined by the density as 1/ϭa 2 .…”

Section: Pair-correlation Functionmentioning

confidence: 99%

Effective interaction in two-dimensional electron systems

2004

View full text Add to dashboard Cite

A fully microscopic derivation is proposed for an effective interaction operator between electrons in the two-dimensional electron gas ͑2DEG͒, which represents multiple-scattering processes in the medium. The obtained interaction features short-range behaviors between electrons, and is presented in a simple form which allows applications in various systems. Short-range correlation in the 2DEG is discussed in detail in terms of the effective interaction with special emphasis on the nonlocal aspect of the correlation.

show abstract

A theoretical study of magnetic dipole transitions in 48Ca

Cited by 66 publications

References 43 publications

Applications of Time-Dependent Density-Matrix Approach

Applications of Time-Dependent Density-Matrix Approach

Electric and magnetic dipole modes in high-resolution inelastic proton scattering at 0°

Effective interaction in two-dimensional electron systems

Contact Info

Product

Resources

About