Magnetic Dipole Strength and the <i>T</i> = 0 Proton–Neutron Residual Interaction

Fearick, R.; Neumann-Cosel, P. von; Richter, A.; Robinson, S. J. Q.; Zamick, Larry

doi:10.1143/jpsj.75.094201

Cited by 3 publications

(3 citation statements)

References 30 publications

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“…Recent computational progress allows shell-model studies of the M 1 strength in large model spaces to describe details of the fragmentation of the mode. For example, unrestricted calculations in the full f p model space are possible now for 46,48 Ti (Fearick et al, 2006). As an example of the state-of-the-art, a study of the stable N = 28 isotones 48 Ca, 50 Ti, 52 Cr, 54 Fe (Langanke et al, 2004) is discussed, whose experimental M 1 strength distributions have been measured in great detail (Sober et al, 1985;Steffen et al, 1980).…”

Section: B Theoretical Description: the Shell Model And Random Phase ...mentioning

confidence: 99%

Magnetic dipole excitations in nuclei: Elementary modes of nucleonic motion

2010

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The nucleus is one of the most multi-faceted many-body systems in the universe. It exhibits a multitude of responses depending on the way one 'probes' it. With increasing technical advancements of beams at the various accelerators and of detection systems the nucleus has, over and over again, surprised us by expressing always new ways of 'organized' structures and layers of complexity. Nuclear magnetism is one of those fascinating faces of the atomic nucleus we discuss in the present review. We shall not just limit ourselves to presenting the by now very large data set that has been obtained in the last two decades using various probes, electromagnetic and hadronic alike and that presents ample evidence for a low-lying orbital scissors mode around 3 MeV, albeit fragmented over an energy interval of the order of 1.5 MeV, and higher-lying spin-flip strength in the energy region 5 − 9 MeV in deformed nuclei, nor to the presently discovered evidence for low-lying proton-neutron isovector quadrupole excitations in spherical nuclei. To the contrary, we put the experimental evidence in the perspectives of understanding the atomic nucleus and its various structures of well-organized modes of motion and thus enlarge our discussion to more general fermion and bosonic many-body systems.

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Section: B Theoretical Description: the Shell Model And Random Phase ...mentioning

confidence: 99%

Magnetic dipole excitations in nuclei: Elementary modes of nucleonic motion

2010

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“…Actually, the normalization factors diverge, if all the QRPA solutions are used for taking into account the QRPA correlations; see Eqs. (17) and (22). It is known that the QRPA ground-state energy also diverges by including all the QRPA solutions for the calculation of this energy [43].…”

Section: Application a Technical Procedures And Parametersmentioning

confidence: 99%

“…The authors of Ref. [17] showed measured B(M 1) of 46,48 Ti and compared them with shell-model results with and without the isoscalar pairing interaction. Without the isoscalar pairing interaction the calculated M 1 strengths in a low-energy region ≤ 8 MeV are not sufficient compared to the experimental data, and with that interaction the calculation results are closer to the data.…”

Section: Introductionmentioning

confidence: 99%

Physical features of strength of isoscalar pairing interaction determined by relation between double charge change and double pair transfer

Terasaki

2020

Preprint

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A new method has been proposed to determine the strength of the isoscalar proton-neutron pairing interaction applicable to many nuclei. The principle is the equivalence between the double charge change and the double transfer of like-particle pair, and a constraint is derived to the effective interactions used in approximations. This method was applied to the quasiparticle random-phase approximation for determining that interaction strength. In this paper, detail of this method is explained thoroughly, and applications are made to nuclei of several instances of the double-β decays. The systematics of the strengths determined for those nuclei is understood in terms of a midshell effect. The effect of the new interaction strength is examined in two examples of the Gamow-Teller strength function with comparisons with the experimental data. The nuclear matrix elements of the neutrinoless double-β decay are also calculated.

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Strength of the isoscalar pairing interaction determined by a relation between double-charge change and double-pair transfer for double- β decay

Terasaki

2020

Phys. Rev. C

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Magnetic Dipole Strength and the T = 0 Proton–Neutron Residual Interaction

Cited by 3 publications

References 30 publications

Magnetic dipole excitations in nuclei: Elementary modes of nucleonic motion

Magnetic dipole excitations in nuclei: Elementary modes of nucleonic motion

Physical features of strength of isoscalar pairing interaction determined by relation between double charge change and double pair transfer

Strength of the isoscalar pairing interaction determined by a relation between double-charge change and double-pair transfer for double- β decay

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