The Effective Nucleon-Nucleon Interaction Deduced from Nuclear Spectra

Schiffer, J. P.

doi:10.1007/978-1-4684-8337-6_18

Cited by 3 publications

(10 citation statements)

References 7 publications

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“…that for this medium-range Singlet-Even-plus-Triplet-Odd force (abbreviated as SE M + TOM) the obtained single particle energies vary more smoothly than those for a force with Singlet-Even component only [9]. Because a long-range repulsion in the Singlet-Even component, as adopted in the Schiffer Interaction, seems now to be ruled out if one wants to reproduce collective 2 + states, we discuss in the next two subsections other empirical evidence, which was given [1] for this repulsion.…”

Section: The Range Of the Singlet-even Force And The G =2 Attractionmentioning

confidence: 94%

“…This means that the result which one obtains with this broken-pair model can often qualitatively be explained in terms of the BCS modek as will sometimes be done in the following sections, Finally, model space III of Fig. 1 indicates the case in which one-particle-one-hole excitations of the neutron closed shell [8] are also allowed to mix with the onebroken-proton-pair configurations (1). This is especially important to make the nucleus "softer" for collective 2 + and 3-excitations,…”

Section: Model Spaces; the Broken-pair Approximationmentioning

confidence: 96%

“…The left half of the figure compares two effective forces which were fitted in small model spaces, viz. the matrix elements of Auerbach and Talmi [7] (curve A) and those of the Schiffer Interaction [1] (curve B). Here we restrict ourselves to the double-range Schiffer Interaction with a Gaussian dependence on range and only central components [1].…”

Section: The Range Of the Singlet-even Force And The G =2 Attractionmentioning

confidence: 99%

“…the matrix elements of Auerbach and Talmi [7] (curve A) and those of the Schiffer Interaction [1] (curve B). Here we restrict ourselves to the double-range Schiffer Interaction with a Gaussian dependence on range and only central components [1]. A similar interaction with a Yukawa shape and with also non-central components has been proposed as well [2].…”

Section: The Range Of the Singlet-even Force And The G =2 Attractionmentioning

confidence: 99%

“…[1,2]. This Schiffer Interaction is a sum of two components with different ranges and with opposite signs.…”

Section: Introductionmentioning

confidence: 97%

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The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

Akkermans

Allaart

1982

Z Physik A

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Like in earlier work by Schiffer et al, the effective interaction is derived from experimental two-body muttiplets. However, now the assumption is that a muttiplet state is formed by two unpaired fermions relative to a core of correlated J=0 pairs. Then the need for two ranges, as proposed by Schiffer, disappears for the force between identical nucleons in a model space which is large enough to include pairing correlations, A form with a single attractive medium range is preferred for the identical nucleon interaction in order to reproduce collective 2 + states in even-even nuclei. In contrast, the proton-neutron force requires a very short range or two ranges to reproduce the empirical values of multipole coefficients, observed in odd-odd nuclei. Therefore we discuss the fact that the effective interaction is not always isospin invariant. As a typical case broken-pair calculations in the N=50 region are considered. But the conclusions drawn, will also apply to other regions of the periodic table.

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Section: The Range Of the Singlet-even Force And The G =2 Attractionmentioning

confidence: 94%

Section: Model Spaces; the Broken-pair Approximationmentioning

confidence: 96%

Section: The Range Of the Singlet-even Force And The G =2 Attractionmentioning

confidence: 99%

Section: The Range Of the Singlet-even Force And The G =2 Attractionmentioning

confidence: 99%

“…[1,2]. This Schiffer Interaction is a sum of two components with different ranges and with opposite signs.…”

Section: Introductionmentioning

confidence: 97%

See 3 more Smart Citations

The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

Akkermans

Allaart

1982

Z Physik A

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Is there a universal relationship connecting all two-body effective interactions?

Schiffer

Effective Interactions and Operators in Nuclei

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Hits Tepott was prepiied as an account of woiV sponsored by the United States Government-Ncilhei the United Slates nor the Untied States Energy fttstnth and Development Administniion, nor any of 1 thru employee), nor any or their comtactan, subcontract on, ot then employees, makes any warranty, express OT implied, or assumes any legal liability ut itspnnubUily Car the accuracy, completeness oi usefulness of any information, apparatus, product or process diicioxd, ot icptescnu that Us uie would not ' tfringe privately owned lights.

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A study of the121,123Sb(p, d) reactions

et al. 1982

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Levels of 12~have been observed using the 111'I23Sb(p,d) reactions at Ep= 26.2 MeV. Thirty-two levels of lZ~ and thirty-four levels of a22Sb are observed below 2.0 MeV excitation with an energy resolution better than 25 keV FWHM. Experimental angular distributions were compared to DWBA calculations in order to extract/-transfers and spectroscopic factors. Strong mixing between the 3sl/2, 2d3/2, 2d5/2, and lgT/2 neutron orbitals is observed in both nuclei. Nuclear Reactions."deduced levels, l, spectrometer.lzl, t/3Sb(p ' d), E=26.2 MeV; measured a(Ea, 0). 120,122Sb J, z~, spectroscopic factors. Enriched targets, magnetic In~oduefion

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The Effective Nucleon-Nucleon Interaction Deduced from Nuclear Spectra

Cited by 3 publications

References 7 publications

The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

The empirical form of the effective nucleon-nucleon interaction in a model space with correlatedJ=0 pairs

Is there a universal relationship connecting all two-body effective interactions?

A study of the121,123Sb(p, d) reactions

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