Microscopic projected-quasiparticle description of odd-mass Pb isotopes

Ceneviva, Carina; Losano, L.; Teruya, N.; Dias, H.

doi:10.1016/s0375-9474(97)00059-6

Cited by 4 publications

(9 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The wave function of this state was calculated to be dominated by the coupling of two neutrons in the 1i 13/2 orbital with the 3p 1/2 orbital in 205 Pb and with the 2f 5/2 orbital in 201,203 Pb, while in 193,195,197 Pb the coupling with the 3p 3/2 orbital has the largest contribution. The g factors of the neutron states in 193 Pb, derived in the PBCS approach with an effective gyromagnetic ratio g ef f s =0.5g free s [8] are shown in Table I. The calculated g P BCS values are in agreement with the measured g factors.…”

Section: A Pbcs Calculationssupporting

confidence: 57%

“…A microscopic description of odd-mass 193−205 Pb nuclei has been recently done within a standard BCS approximation in a number-projected one-and three-quasiparticle neutron space in which the projection was performed after the minimization of the ground state energy [8]. A surface delta interaction was used for the residual nucleon-nucleon interaction.…”

Section: A Pbcs Calculationsmentioning

confidence: 99%

“…In the PBCS calculations reported in Ref. [8] effective neutron charges of e ef f ν =0.5e and e ef f ν =1.0e were used to evaluate the electric quadrupole moments. The core polarization charges for single particle orbits around doubly magic 208 Pb were calculated microscopically by Sagawa and Arima [29].…”

Section: A Pbcs Calculationsmentioning

confidence: 99%

“…Rather complex level schemes, involving in many cases isomeric states, have been established via in-beam and decay studies [1][2][3][4]. The spherical structures observed in these nuclei are associated to the proton shell closure at Z=82, and have been interpreted in various phenomenological and microscopical approaches involving neutron quasiparticle excitations [5][6][7][8]. These spherical neutron states are coexisting at low energies with more deformed states, associated to proton intruder particle-hole excitations across the closed shell [9].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quadrupole moments andgfactors for high-spin neutron isomers inPb193

Ionescu‐Bujor¹,

Iordăchescu²,

Balabanski

et al. 2004

Phys. Rev. C

View full text Add to dashboard Cite

The g factors and quadrupole moments of the 21/2 − and 33/2 + isomers in 193 Pb have been measured by the time-differential perturbed γ-ray angular distribution method as g(21/2 −)=-0.059(11), |Q(21/2 −)| = 0.22(2) eb and g(33/2 +)=-0.171(9), |Q(33/2 +)| = 0.45(4) eb. The results support the three-neutron configurations (1i 13/2) 2 12 + ⊗ 3p 3/2 and (1i 13/2) 3 for the 21/2 − and 33/2 + states, respectively. The quadrupole moment of the 12 + isomer in 194 Pb described by the twoneutron (1i 13/2) 2 configuration has been remeasured as |Q(12 +)| = 0.48(3) eb in perfect agreement with the previous data. The experimental results are discussed within a microscopic BCS approach in a number-projected one-and three-quasiparticle neutron space, and in the frame of the pairing plus quadrupole tilted-axis cranking model.

show abstract

Section: A Pbcs Calculationssupporting

confidence: 57%

Section: A Pbcs Calculationsmentioning

confidence: 99%

Section: A Pbcs Calculationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quadrupole moments andgfactors for high-spin neutron isomers inPb193

Ionescu‐Bujor¹,

Iordăchescu²,

Balabanski

et al. 2004

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The quadrupole moments of the neutron states were analyzed within a microscopic BCS approach in a numberprojected one-and three-quasiparticle neutron space [31]. The BCS calculations with an effective neutron charge of e eff ν = 1.0e, which reproduce the quadrupole moments of neutron states in nuclei near the N = 126 closed shell [34], underestimate the quadrupole moments in the light lead nuclei.…”

Section: Discussionmentioning

confidence: 99%

Spin, quadrupole moment, and deformation of the magnetic-rotational band head inPb193

Balabanski

Ionescu‐Bujor²,

Iordăchescu³

et al. 2011

Phys. Rev. C

View full text Add to dashboard Cite

The spectroscopic quadrupole moment of the T 1/2 = 9.4(5) ns isomer in 193 Pb at an excitation energy E ex = (2585 + x) keV is measured by the time-differential perturbed angular distribution method as |Q s | = 2.6(3) e b. Spin and parity I π = 27/2 − are assigned to it based on angular distribution measurements. This state is the band head of a magnetic-rotational band, described by the coupling of a neutron hole in the 1i 13/2 subshell with the (3s −2 1/2 1h 9/2 1i 13/2 ) 11 − proton excitation. The pairing-plus-quadrupole tilted-axis cranking calculations reproduce the measured quadrupole moment with a moderate oblate deformation 2 = −0.11, similar to that of the 11 − proton intruder states, which occur in the even-even Pb nuclei in the region. This is the first direct measurement of a quadrupole moment and thus of the deformation of a magnetic-rotational band head.

show abstract

Bonn potential and shell-model calculations for206,205,204Pb

et al. 1998

View full text Add to dashboard Cite

The structure of the nuclei 206,205,204 Pb is studied in terms of shell model employing a realistic effective interaction derived from the Bonn A nucleon-nucleon potential. The energy spectra, binding energies and electromagnetic properties are calculated and compared with experiment. A very good overall agreement is obtained. This evidences the reliability of our realistic effective interaction and encourages use of modern realistic potentials in shell-model calculations for heavy-mass nuclei.

show abstract

Microscopic projected-quasiparticle description of odd-mass Pb isotopes

Cited by 4 publications

References 39 publications

Quadrupole moments andgfactors for high-spin neutron isomers inPb193

Quadrupole moments andgfactors for high-spin neutron isomers inPb193

Spin, quadrupole moment, and deformation of the magnetic-rotational band head inPb193

Bonn potential and shell-model calculations for206,205,204Pb

Contact Info

Product

Resources

About