The giant dipole resonance in the transition region for the neodymium isotopes

Carlos, P.; Beil, H.; Bergère, R.; Leprêtre, A.; Veyssière, A.

doi:10.1016/0375-9474(71)90725-1

Cited by 113 publications

(95 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…165 Ho(γ,n) 164 Ho reaction cross sections were compared with the available experimental data [11][12]. In general our calculations for all level density models are in good agreement with experimental data obtained from EXFOR [13].…”

Section: B-229supporting

confidence: 64%

Calculations of (γ,n) Reaction Cross Sections using Different Level Density Models for Some Lanthanide Nuclei

et al. 2015

View full text Add to dashboard Cite

The discrete level information deficiency requires usage of level density models in cross section calculations. The total reaction cross sections for gamma-induced reactions through the six level density models with a consistent parameterization of some lanthanides ( Lu) were calculated using TALYS 1.6 in the incident energy range from 5 to 30 MeV. All calculations from the present study were compared with each other and with data available in the literature.

show abstract

Section: B-229supporting

confidence: 64%

Calculations of (γ,n) Reaction Cross Sections using Different Level Density Models for Some Lanthanide Nuclei

et al. 2015

View full text Add to dashboard Cite

show abstract

“…For instance, the peak splitting of the giant dipole resonance (GDR), which is caused by the different frequencies of oscillation along the long and short axes, has been observed in experiments [4]. A typical example of the shape phase transition from spherical to deformed ground states and the evolution of deformation splitting in GDRs have been observed in Nd and Sm isotopes [2,3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Skyrme energy-density functional approach to collective dynamics

Yoshida

Hinohara

Nakatsukasa

2011

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

“…In the inset of Fig. 2, the total photoabsorption cross section (solid line) calculated in the SRPA is compared with the experimental data [20]. The shape of the GDR depends on the parameter f , whereas it is little affected by the parameter v 0 .…”

mentioning

confidence: 98%

“…1 but for 142 Nd. In the inset the total photoabsorption cross section calculated from the strength function in the SRPA (solid line) is compared with the experimental data (dots) [20]. The dotted line in the inset denotes the result calculated with f = 0.9. f (See the dotted line in the inset of Fig.…”

mentioning

confidence: 99%

Fragmentation of electric dipole strength inN=82isotones

Tohyama

Nakatsukasa

2012

Phys. Rev. C

View full text Add to dashboard Cite

Fragmentation of the dipole strength in the N = 82 isotones 140 Ce, 142 Nd and 144 Sm is calculated using the second random-phase approximation (SRPA). In comparison with the result of the random-phase approximation (RPA), the SRPA provides the additional damping of the giant dipole resonance and the redistribution of the low-energy dipole strength. Properties of the low-energy dipole states are significantly changed by the coupling to two-particle-two-hole (2p2h) states, which are also sensitive to the correlation among the 2p2h states. Comparison with available experimental data shows a reasonable agreement for the low-energy E1 strength distribution.PACS numbers: 21.60. Jz, 24.30.Cz, 27.60.+j The low-energy dipole states, often referred to as the pygmy dipole resonance (PDR), have attracted recent experimental [1][2][3][4][5][6] and theoretical interests [7][8][9][10][11][12] (see also the recent review [13] and references therein). It is also of significant astrophysical interest, since the low-energy dipole strengths close to the neutron threshold strongly affect the astrophysical r-process nucleosynthesis [14].The quasiparticle random-phase approximation based on the Hartree-Fock-Bogoliubov ground state (HFB+QRPA) has been extensively used to study the PDR as well as the giant dipole resonances (GDR). Recent systematic calculations [15] for the Nd and Sm isotopes show that although the HFB+QRPA nicely reproduces characteristic features of the shape phase transition in the GDR, it fails to produce the low-energy dipole strengths at E x = 5.5 ∼ 8 MeV, observed in the N = 82 isotones, 142 Nd and 144 Sm [1,3]. The disagreement suggests that the coupling to complex configurations, such as multi-particle-multi-hole states, are required to study the PDR in these nuclei. In fact, the quasiparticle-phonon model (QPM), which takes into account coupling to multi-phonon states, successfully reproduces the low-energy dipole strengths in the N = 82 nuclei [2,4]. A similar approach based on the relativistic mean-field model has also been used to study the PDR in the tin and nickel isotopes [16]. These models assume the multi-phonon characters of the complex states and violate the Pauli principle. Thus, it is desirable to study properties of the PDR with a method complementary to these phonon-coupling approaches. In this work, we present studies for the dipole excitations in the N = 82 isotones, with the second random-phase approximation (SRPA) (Ref.[17] and references therein). The SRPA explicitly incorporates the two-particle-two-hole (2p2h) states instead of "two-phonon" states, and respects the Pauli principle in the 2p2h configurations. Recently, the low-energy dipole states in 40,48 Ca have been studied with the SRPA [18], which suggests that the coupling between one-particle-one-hole (1p1h) and 2p2h configurations enhances the electric dipole (E1) strength in the energy range from 5 to 10 MeV. We investigate whether a similar effect can be observed in the isotones of N = 82. Since there are many dipole states w...

show abstract

The giant dipole resonance in the transition region for the neodymium isotopes

Cited by 113 publications

References 17 publications

Calculations of (γ,n) Reaction Cross Sections using Different Level Density Models for Some Lanthanide Nuclei

Calculations of (γ,n) Reaction Cross Sections using Different Level Density Models for Some Lanthanide Nuclei

Skyrme energy-density functional approach to collective dynamics

Fragmentation of electric dipole strength inN=82isotones

Contact Info

Product

Resources

About