Study of the proton shell closure of 208Pb through the 205Tl(, 3He)204Hg reaction

Grabmayr, P.; Wagner, G.; Clement, H.; Röhm, H.F.

doi:10.1016/0375-9474(89)90022-5

Cited by 21 publications

(18 citation statements)

References 32 publications

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“…One of the aims of the present study is to investigate the sensitivity of the results for the Green-function or the spectral function on the approximations chosen for the irreducible self-energy and on the choice of the model-space. As examples we consider the closed shell nuclei 16 Oand 40 Ca. The results obtained for the spectral function can directly be compared with experimental data obtained in (e, e ′ )p experiments [15,16,17].…”

Section: Introductionmentioning

confidence: 99%

“…As examples we consider the closed shell nuclei 16 Oand 40 Ca. The results obtained for the spectral function can directly be compared with experimental data obtained in (e, e ′ )p experiments [15,16,17]. From the Green-function we can furthermore derive the occupation probabilities for the various single-particle orbits.…”

Section: Introductionmentioning

confidence: 99%

“…The presentation there helps to establish the nomenclature but also to define some details of the present investigation. Results on the spectral function, occupation probabilities, binding energies and radii for 16 O and 40 Ca obtained with the use of various approximations, are presented in sect. 3.…”

Section: Introductionmentioning

confidence: 99%

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Long-range correlations in closed-shell nuclei

Müther

Skouras

1995

Nuclear Physics A

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The effects of correlations on the bulk properties of nuclei are investigated in large model spaces including up to 21 single-particle orbits. The evaluation of the single-particle Green function is made feasible by means of the BAGEL approximation. The spectral function for single-nucleon pick-up and removal is investigated for the nuclei 16 O and 40 Ca. Special attention is paid to the effects produced by correlations on the calculated ground state properties of closed shell nuclei. It is observed that correlations beyond the Brueckner Hartree Fock approximation tend to improve the results obtained using realistic nucleon nucleon interactions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Long-range correlations in closed-shell nuclei

Müther

Skouras

1995

Nuclear Physics A

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“…The 28% occupancy of the f7~z means we should expect 28%%uo x 8 = 2.24 protons in the f7yz state. Second, spectroscopic factors deduced from other experiments, using hadrons as probes, are generally larger than the corresponding ones obtained from (e, e'p) experiments [20]. With these results in mind, we used our relativistic calculation to evaluate the single-particle transition cross section and to calculate the spectroscopic factor.…”

Section: Resultsmentioning

confidence: 96%

QuasielasticCa40(e,e’p) cross sections in a many-particle self-consistent Hartree model

et al. 1993

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A fully distorted partial-wave calculation is presented for the reaction Ca(e, e'p) K which uses relativistic self-consistent Hartree wave functions for both the target nucleus and the residual nucleus. The final state interaction of the knocked-out nucleon is described by an optical potential and the Coulomb distortion of the electron wave functions is also included. We assume standard values for meson coupling constants and masses in the HartI'ee calculations and the optical potential used comes from global fits to elastic proton scattering; hence, this calculation is a description of (e, e'p) reactions with no free parameters. We examine the proton knocked-out from the d3yq state of Ca which leaves the residual nucleus K in its ground state. Agreement with the experimental data of MKHEF is good and the calculated spectroscopic factor agrees very well with the one extracted from experiment. There seems to be no need to make the assumption that the d3g~s tate is appreciably depleted. We also calculate the (e, e'p) cross section from the 2szyz and 1f7/2 orbitals. For the 2sig2 orbital the shape does not agree so well with the experimental data. The f&I2 orbital leads to approximately the correct shape and we extract a spectroscopic factor of 3.770. PACS number(s): 25.30. Fj, 21.60.3z

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“…This spectrum is dominated by the 437-keV, 2 + 1 → 0 + , transition of 204 Hg with 9.5 × 10 7 counts. All other strong γ rays originate from 204 Hg excited states [23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] as well and most of these are in coincidence with the ground-state transition (cf. Fig.…”

Section: Methodsmentioning

confidence: 99%

Identification of the one-quadrupole phonon 21,ms+ state of 204Hg

et al. 2017

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Available online xxxx Editor: V. Metag Keywords: γ ray spectroscopy Coulomb excitation Quadrupole collectivity Isospin degree of freedom Shell structureOne-phonon states of vibrational nuclei with mixed proton-neutron symmetry have been observed throughout the nuclear chart besides the mass A ≈ 200 region. Very recently, it has been proposed that the 2 + 2 state of 212 Po is of isovector nature. This nucleus has two valence protons and two valence neutrons outside the doubly-magic 208 Pb nucleus. The stable isotope 204 Hg, featuring two valence-proton and valence-neutron holes, with respect to 208 Pb, is the particle-hole mirror of 212 Po. In order to compare the properties of low-lying isovector excitations in these particle-hole mirror nuclei, we have studied 204 Hg by using the projectile Coulomb-excitation technique. The measured absolute B(M1; 2 +strength of 0.20 (2) μ 2 N indicates that the 2 + 2 level of 204 Hg is at least the main fragment of the 2 + 1,ms state. For the first time in this mass region, both lowest-lying, one-quadrupole phonon excitations are established together with the complete set of their decay strengths. This allows for a microscopic description of their structures, achieved in the framework of the Quasi-particle Phonon Model.

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Study of the proton shell closure of 208Pb through the 205Tl(, 3He)204Hg reaction

Cited by 21 publications

References 32 publications

Long-range correlations in closed-shell nuclei

Long-range correlations in closed-shell nuclei

QuasielasticCa40(e,e’p) cross sections in a many-particle self-consistent Hartree model

Identification of the one-quadrupole phonon 21,ms+ state of 204Hg

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