Overview of neutron–proton pairing

Frauendorf, S.; Macchiavelli, A. O.

doi:10.1016/j.ppnp.2014.07.001

Cited by 188 publications

(184 citation statements)

References 185 publications

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“…[15]. It should be noted that for 113 Cs with neutron number N = Z + 3, the neutron-proton pairing correlations may play an important role on the properties of rotational alignments in the high-j proton and neutron h 11/2 subshell [65,66]. After considering this effect, the calculated results may be improved.…”

Section: Numerical Detailsmentioning

confidence: 99%

Investigation of the high-spin rotational properties of the proton emitter ¹¹³ Cs using a particle-number conserving method

Zhang¹,

Xu²

2017

Chinese Phys. C

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Abstract:The recently observed two high-spin rotational bands in the proton emitter 113 Cs are investigated using the cranked shell model with pairing correlations treated by a particle-number conserving method, in which the Pauli blocking effects are taken into account exactly. By using the configuration assignments of band 1 (π3/2 + [422], α = −1/2) and band 2 (π1/2 + [420], α = 1/2), the experimental moments of inertia and quasiparticle alignments can be well reproduced by the present calculations, which in turn strongly support these configuration assignments. Furthermore, by analyzing the occupation probability nµ of each cranked Nilsson level near the Fermi surface and the contribution of each orbital to the angular momentum alignments, the backbending mechanism of these two bands is also investigated.

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Section: Numerical Detailsmentioning

confidence: 99%

Investigation of the high-spin rotational properties of the proton emitter ¹¹³ Cs using a particle-number conserving method

Zhang¹,

Xu²

2017

Chinese Phys. C

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“…A detailed review can be found in Ref. [9]. Here we mentioned a few studies around the same region as we studied above.…”

Section: The Np Pairing Correlation Within the Deformed Shell-model Fmentioning

confidence: 99%

“…Overviews on np pairing correlations are published recently in Refs. [9,10,11]. Extensive discussions can also be found in workshops organized recently (see, e.g., Ref.…”

Section: Introductionmentioning

confidence: 98%

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N=Znuclei: a laboratory for neutron–proton collective mode

Qi¹,

Wyss²

2015

Phys. Scr.

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The neutron-neutron and proton-proton pairing correlations have long been recognized to be the dominant many-body correlation beyond the nuclear mean field since the introduction of pairing mechanism by Bohr, Mottelson and Pines nearly 60 year ago. Nevertheless, few conclusion has been reached concerning the existence of analogous neutron-proton (np) pair correlated state. One can see a renaissance in np correlation studies in relation to the significant progress in radioactive ion beam facilities and detection techniques.The np pairs can couple isospin T = 1 (isovector) or 0 (isoscalar).In the isovector channel, the angular momentum zero component is expected to be the most importance one. On the other hand, as one may infer from the general properties of the np two-body interaction, in the isoscalar channel, both the np pairs with minimum (J=1) and maximum (J=2j) spin values can be important. In this contribution, we will discuss the possible evidence for np pair coupling from different perspective and analyze its influence on interesting phenomena including the Wigner effect and mass correlations in odd-odd nuclei. In particular, we will explain the spin-aligned pair coupling scheme and quartet coupling involving pairs with maximum (J=2j) spin values.

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“…This led to a renewal of interest in neutronproton (np) pairing (see e.g. [1]). The latter is often treated using the BCS theory of which the main defect is the non-conservation of the number of particles.…”

Section: Introductionmentioning

confidence: 99%

Particle-number conservation in charge-radii of odd-mass proton-rich nuclei in the isovector neutron-proton pairing case

Fellah¹,

Allal²,

Douici³

et al. 2017

AIP Conference Proceedings

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Abstract. In medium-mass nuclei close to the N=Z line, the neutron-proton (np) pairing correlations play an important role. They are generally studied within the BCS approach, but the main shortcoming of the latter is the particle-number fluctuation. A projection is thus necessary. Furthermore, the charge-radius is one of the fundamental properties of atomic nuclei. Its study may provide useful information about their size and shape. The isovector np pairing effects as well as those of the particle-number projection on the proton system radii of even-even nuclei such as N close to Z have been recently studied. The aim of the present contribution is to study these effects on the charge-radii of odd-mass nuclei in the same region. As a first step, an expression of the projected quadratic charge radius is established using the Sharp-BCS (SBCS) method. It is shown that it generalizes the one obtained when only the like-particles pairing is considered. As a second step, the charge-radii of some odd-mass nuclei are calculated using the single-particle energies of a Woods-Saxon mean-field. The obtained results are compared to those obtained when only the like-particles pairing is considered.

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Overview of neutron–proton pairing

Cited by 188 publications

References 185 publications

Investigation of the high-spin rotational properties of the proton emitter ¹¹³ Cs using a particle-number conserving method

Investigation of the high-spin rotational properties of the proton emitter ¹¹³ Cs using a particle-number conserving method

N=Znuclei: a laboratory for neutron–proton collective mode

Particle-number conservation in charge-radii of odd-mass proton-rich nuclei in the isovector neutron-proton pairing case

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Overview of neutron–proton pairing

Cited by 188 publications

References 185 publications

Investigation of the high-spin rotational properties of the proton emitter 113 Cs using a particle-number conserving method

Investigation of the high-spin rotational properties of the proton emitter 113 Cs using a particle-number conserving method

N=Znuclei: a laboratory for neutron–proton collective mode

Particle-number conservation in charge-radii of odd-mass proton-rich nuclei in the isovector neutron-proton pairing case

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Investigation of the high-spin rotational properties of the proton emitter ¹¹³ Cs using a particle-number conserving method

Investigation of the high-spin rotational properties of the proton emitter ¹¹³ Cs using a particle-number conserving method