Dipole and spin-dipole strength distributions in $$^{124,126,128,130}\mathrm {Te}$$124,126,128,130Te isotopes

Çakmak, Necla; Çakmak, Şadiye; Selam, Cevad; Ünlü, Serdar

doi:10.1007/s12043-017-1503-z

Cited by 9 publications

(7 citation statements)

References 35 publications

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“…For the TGI-QPNM calculations, the strength parameter of the isovector dipole-dipole interaction has been chosen to be χ 1 =300 A −5/3 MeVfm −2 . This value of χ 1 gives reasonably good results in explaining the observed E1 transitions at the energies below 4 MeV and in the PDR region in both spherical [53] and deformed even-even nuclei [54].…”

Section: Resultssupporting

confidence: 64%

“…Pyatov method is a suitable way to restore broken symmetries [48,49]. This method is used to restore Rotational, Translational, and Galilean symmetries in deformed nuclei [41][42][43][44][45][46][47][48][49][50][51][52][53][54]. In this way, the coupling constant and matrix elements of the effective interactions can be found self-consistently for the radial part of the mean-field potential and explicitly separate the zero energy branch of the excitation related to the spurious state [51].…”

Section: Restoration Of Broken Symmetriesmentioning

confidence: 99%

“…Further e q are the conventional quasiparticle energies and ( ) a a r r + q q represent the quasiparticle creation (annihilation) operators where r =  characterize the time-conjugate states [44]. According to the Pyatov prescription [51], the rotational invariance of the H sqp can be provided by [46,[52][53][54]:…”

Section: Ri-qpnm For M1 Excitationsmentioning

confidence: 99%

“…Among them, translation and Galilean symmetry have curial importance for E1 excitations. According to the Pyatov prescription [51], the translation and Galilean invariance of the H sqp can be respectively provided by [46,[52][53][54]:…”

Section: Tgi-qpnm For E1 Excitationsmentioning

confidence: 99%

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Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in ¹⁷⁵Lu

et al. 2022

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The low-lying magnetic (M1) and electric (E1) dipole modes in well-deformed odd-proton 175Lu have been investigated in the framework of the Rotational, Translational, and Galilean Invariant-Quasiparticle Phonon Nuclear Model (RTGI-QPNM) for the first time. In this model, the single-particle basis obtained from an axially symmetric Woods-Saxon potential, E1 and M1 excitations are assumed to be generated by isovector dipole-dipole and spin-spin interactions between nucleons, respectively. It also includes the restoration forces for breaking the Rotational, Translational and Galilean symmetries of the nuclear Hamiltonian. The transition probabilities, radiation widths and the structure for both M1 and E1 transitions in 175Lu have been calculated. The theory has satisfactorily reproduced the observed fragmentation in dipole spectra. However, the individual dipole strength of the states is higher than the experimental ones, which may be attributed to the lack of multiphonon configurations in the model used. Besides, the predicted total dipole radiation width and its reduced value are almost twice the experimental data. This difference is a well-known phenomenon for odd-mass deformed nuclei, called ‘missing strength’, arising in the Nuclear Resonance Flouracanse experiment due to the high-level densities.

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Section: Resultssupporting

confidence: 64%

Section: Restoration Of Broken Symmetriesmentioning

confidence: 99%

Section: Ri-qpnm For M1 Excitationsmentioning

confidence: 99%

Section: Tgi-qpnm For E1 Excitationsmentioning

confidence: 99%

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Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in ¹⁷⁵Lu

et al. 2022

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“…where | ñ core is the core with its Fermi level at some magic number. The detail solutions of the GT and FF transitions for the odd−A nuclei can be seen from [20,21].…”

Section: Extension For Odd-a Nucleimentioning

confidence: 99%

β-decay of N = 126 isotones for the r-process nucleosynthesis

Nabi¹,

Çakmak²,

Ullah³

et al. 2021

Phys. Scr.

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The β-decay properties of nuclei with neutron number N = 126 is investigated in this paper. Two different versions of the proton-neutron quasi particle random phase (pn-QRPA) model were employed to compute β-decay rates and half-lives for the N = 126 isotones. The first set of calculation solves the pn-QRPA equations using the schematic model (SM) approach. The Woods-Saxon potential was employed as a mean-field basis. A spherical shape assigned for each waiting point nuclei throughout all simulations. Both allowed Gamow-Teller (GT) and first-forbidden (FF) transitions were considered in the particle-hole (ph) channel. The second set uses the pn-QRPA model in deformed Nilsson basis to calculate β-decay rates for allowed GT and unique first-forbidden (U1F) transitions under terrestrial and stellar conditions. Our results are in agreement with shell model findings that first-forbidden transitions lead to a considerable decrement in the calculated half-lives of the isotones. Inclusion of the first-forbidden contribution led to a decent agreement of our computed terrestrial β-decay half-lives with measured ones, much better than the previous calculations. The possible implication of the waiting point nuclei on r-process nucleosynthesis is discussed briefly.

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Translational and Galilean Invariant Quasiparticle Phonon Nuclear Model (TGI-QPNM) for electric dipole (E1) transitions in odd-mass deformed nuclei

et al. 2020

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Dipole and spin-dipole strength distributions in $$^{124,126,128,130}\mathrm {Te}$$124,126,128,130Te isotopes

Cited by 9 publications

References 35 publications

Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in ¹⁷⁵Lu

Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in ¹⁷⁵Lu

β-decay of N = 126 isotones for the r-process nucleosynthesis

Translational and Galilean Invariant Quasiparticle Phonon Nuclear Model (TGI-QPNM) for electric dipole (E1) transitions in odd-mass deformed nuclei

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Dipole and spin-dipole strength distributions in $$^{124,126,128,130}\mathrm {Te}$$124,126,128,130Te isotopes

Cited by 9 publications

References 35 publications

Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in 175Lu

Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in 175Lu

β-decay of N = 126 isotones for the r-process nucleosynthesis

Translational and Galilean Invariant Quasiparticle Phonon Nuclear Model (TGI-QPNM) for electric dipole (E1) transitions in odd-mass deformed nuclei

Contact Info

Product

Resources

About

Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in ¹⁷⁵Lu

Scissors mode and effects of the low-lying E1 excitations on the dipole distributions in ¹⁷⁵Lu