Magnetic dipole response of the 169Tm nucleus

Tabar, E.; Yakut, H.; Kuliev, A.A.

doi:10.1016/j.nuclphysa.2018.07.001

Cited by 14 publications

(18 citation statements)

References 58 publications

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“…In this study, the high-lying E1 excitations were systematically investigated within the TGI-QPNM in oddmass [153][154][155][156][157][158][159] Eu nuclei for the first time. The QPNM [49,50] model used for odd-mass nuclei is an upper version of the QRPA [51,52] model, which successfully explains dipole excitations in even-even deformed nuclei. However, this success is possible by the restoration of the symmetries, such as rotational, translational, and Galilean, broken due to nuclear mean-field approximations or by isolating the spurious states mixing to real dipole excitations.…”

Section: Introductionmentioning

confidence: 99%

Study of the high lying electric dipole excitations in Odd-A ^153–159Eu isotopes

et al. 2021

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In this paper, we have studied the electric dipole (E1) transitions in odd-mass 153–159Eu nuclei within Translational+Galilean Invariant Quasiparticle Phonon Nuclear Model (TGI-QPNM). Within the scope, the Giant and Pygmy Dipole Resonances (GDR and PDR) have been investigated in the energy range of 5–20 MeV. The numerical results show that the contribution of PDR and GDR to the total E1 strength is 2% and 98%, respectively. It has been found that the TGI-QPNM predicts the double hump structure and that the agreement between theoretical results and the existing experimental data is perfect, especially near the neutron binding energy Sn and the first hump of the GDR. Also the comparison of the theoretical results and the existing experimental data shows reasonable agreement for the integrated moments of the cross-sections in the GDR region. We can also deduce from the structure analysis of excited states the studied isotopes, that the GDR states can be considered to be more collective than the PDR states.

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Section: Introductionmentioning

confidence: 99%

Study of the high lying electric dipole excitations in Odd-A ^153–159Eu isotopes

et al. 2021

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“…This appendix gives some details about the RI-QPNM formalism that was applied to study magnetic dipole (M1) transitions. For an odd-mass deformed nucleus, the Hamiltonian system contains an axially symmetric average field, monopole pairing, residual spin-spin force, and restoration terms (For additional information, see [64,70,71,[100][101][102]).…”

Section: Appendix B Ri-qpnm Of Magnetic Dipole Transitions In Odd-mas...mentioning

confidence: 99%

“…are the isoscalar and isovector effective forces that are used for restoring the broken rotational symmetry of H sqp due to the mean-field approximation [100][101][102]. The τ = n(p) and the quantum number ( ) º q n p represent the intrinsic neutron (proton) single-particle states.…”

Section: ( )mentioning

confidence: 99%

Microscopic calculation of the electromagnetic dipole strength for ^239,243Pu isotopes

Yakut¹,

Tabar²,

Kemah³

et al. 2022

J. Phys. G: Nucl. Part. Phys.

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This work investigates the electric and magnetic dipole (E1 and M1) responses for 239,243Pu isotopes based on the quasiparticle phonon nuclear model (QPNM) by adding the residual interactions for addressing the violations of rotational, translational, and Galilean symmetries caused by the mean-field approach, for the first time. We focus on the E1 and M1 dipole strengths and photo-absorption cross sections up to 20 MeV, and the results reveal that the giant dipole resonance (GDR) best describes the experimental trend with a ratio of 95%. It appears that most of the E1 strength is found at Ex=8–20 MeV, but the total B(E1)↑ strength for the pygmy dipole resonance (PDR) at Ex=4–8 MeV accounts for some 1.83 e2fm2, which in turn corresponds to 2% of the Thomas–Reiche–Kuhn (TRK) sum rule. Furthermore, the resultant total B(M1)↑ value for the scissors mode strength below 4 MeV is 5.65 , which is lower than that of the Oslo data (10.1(15) ). However, the theoretically predicted scissors resonance structure with two peaks in the 1–3.5 MeV energy range exhibits a similar trend to that found in the Oslo data.

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“…The importance of spin-spin forces is not only limited to the description of the spin polarization effect and ground-state magnetic properties in odd-A nuclei, it is also known that the spin-dependent part of neutron-proton interactions is responsible for the Gammow-Teller β transitions between the low energy levels of the nuclei [45,46]. More importantly, the studies performed to now show that spin-spin forces have successfully explained 1+ excitations and scissor mode in even-even nuclei [47][48][49][50][51][52][53][54][55][56]. For these reasons, it is very important to determine the spin-spin interaction parameters that are the subject of this article.…”

Section: K πmentioning

confidence: 99%

Numerical Analysis of the Ground-State Magnetic Moments of ${}^{143,145,147}{\rm{Sm}}$ Isotopes

Güner

2020

Mathematical Sciences and Applications E-Notes

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The description of the ground-state magnetic properties of odd-mass nuclei is very informative in understanding of the complex structure of the deformed nuclei. The ground-state magnetic moments of most of the odd-A deformed nuclei have been measured by various experimental studies and there are numerous studies in the literature. However, many of the theoretical studies on magnetic moments and spin polarization effects affecting them are far from explaining these measured values. In this paper, the magnetic moments and effective spin g factors of 143,145,147 Sm isotopes in the lanthanides region of the periodic table were investigated within the framework of the Quasiparticle-Phonon Nuclear Model (QPNM) based on the Lagrange Multiplier Method for the first time. Spin-spin interaction parameters (χ) were determined by comparing theoretical and experimental values of magnetic moments of the related isotopes and these interactions were found to have an isovector character q = −1. It has been observed that the ground-state structures of the studied isotopes are weakly affected by quasiparticle⊗phonon interactions and the contribution of these interactions (G K0v iµ values) to the ground-state wave functions is quite small (around 0.01%). Theoretical explanation of the renormalization of spin gyromagnetic factor is one of the most important problems of nuclear structure physics. The results obtained in this study for the effective spin gyromagnetic factor g ef f. s g τ s also agree with the phenological value g ef f.s = (0.5 − 0.7)g τ s .

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Magnetic dipole response of the 169Tm nucleus

Cited by 14 publications

References 58 publications

Study of the high lying electric dipole excitations in Odd-A ^153–159Eu isotopes

Study of the high lying electric dipole excitations in Odd-A ^153–159Eu isotopes

Microscopic calculation of the electromagnetic dipole strength for ^239,243Pu isotopes

Numerical Analysis of the Ground-State Magnetic Moments of ${}^{143,145,147}{\rm{Sm}}$ Isotopes

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Magnetic dipole response of the 169Tm nucleus

Cited by 14 publications

References 58 publications

Study of the high lying electric dipole excitations in Odd-A 153–159Eu isotopes

Study of the high lying electric dipole excitations in Odd-A 153–159Eu isotopes

Microscopic calculation of the electromagnetic dipole strength for 239,243Pu isotopes

Numerical Analysis of the Ground-State Magnetic Moments of ${}^{143,145,147}{\rm{Sm}}$ Isotopes

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Product

Resources

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Study of the high lying electric dipole excitations in Odd-A ^153–159Eu isotopes

Study of the high lying electric dipole excitations in Odd-A ^153–159Eu isotopes

Microscopic calculation of the electromagnetic dipole strength for ^239,243Pu isotopes