On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons

Knüpfer, W.; Richter, A.

doi:10.1007/bf01881272

Cited by 11 publications

(8 citation statements)

References 23 publications

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“…We finally remark on the relative importance of the different parts of the paramagnetic susceptibility coming from the excitation of nuclear states below the pion threshold and above. If we denote the former by )~n we have the following typical average value resulting from experiment [14] : Z,,~2.4.10 2 fm 3.…”

Section: Numerical Evaluation Of Zn and A ~N And Discussionmentioning

confidence: 99%

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Dispersive effects for the nuclear paramagnetic susceptibility

Christillin

Richter

1987

Z. Physik A - Atomic Nuclei

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Dedicated to Professor Friedrich Beck on the occasion of his 60th birthday Dispersive effects coming from pionic degrees of freedom (virtual magnetic pion photoproduction) are shown to reproduce the nucleonic magnetic susceptibility and to yield a parallel quenching in nuclei. The relative importance of low lying nuclear vs. A-excitations is discussed and the difference of their role for the magnetic and electric polarizability is pointed out.

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Section: Numerical Evaluation Of Zn and A ~N And Discussionmentioning

confidence: 99%

“…The interest into the magnetic polarizability in nuclei has also been stimulated by the fact that this quantity has only become available experimentally within recent years [13,14]. It has unmistakebly been found to be below the predictions from the free nucleon shell model value even when RPA-correlations were taken into account.…”

Section: Introductionmentioning

confidence: 99%

Dispersive effects for the nuclear paramagnetic susceptibility

Christillin

Richter

1987

Z. Physik A - Atomic Nuclei

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“…Similarly, χ M1 is a measure of the magnetic dipole response, M, to a magnetic field, B, i.e. M = χ M1 • B [16], and can be decomposed into paramagnetic (χ para M1 ) and diamagnetic (χ dia M1 ) susceptibilities,…”

Section: Motivationmentioning

confidence: 99%

“…paramagnetism, is dominant for A < 20 nuclides and may have a substantial contribution to σ −2 values (e.g. 6 Li and 7 Li), whereas diamagnetism has negligible effects [15,16]. It would be interesting to have an updated evaluation of M1 strengths to investigate whether paramagnetism contributes in heavy nuclei, particularly from mixedsymmetry states recently found in the A ∼ 90 region [17][18][19].…”

Section: Motivationmentioning

confidence: 99%

How do we infer shell effects at high-excitation energies? A new spectroscopic probe to search for magic numbers

Ngwetsheni

Orce

2019

EPJ Web Conf.

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The nuclear dipole polarizability is mainly governed by the dynamics of the giant dipole resonance and, assuming validity of the brink-Axel hypothesis, has been investigated along with the effects of the low-energy enhancement of the photon strength function for nuclides in medium- and heavy-mass nuclei. Cubic-polynomial fitsto both data sets extrapolated down to a gamma-ray energy of 0.1 MeV show a significantreduction of the nuclear dipole polarizability for semi-magic nuclei, with magic numbers N =28, 50 and 82, which supports shell effects at high-excitation energies in the the quasi-continuum region. This work assigns σ-2 values as sensitive measures of long-range correlations of the nuclear force and provides a new spectroscopic probe to search for “old” and “new” magic numbers at high-excitation energies.

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“…Similarly, χ M1 is a measure of the magnetic dipole response, M, to a magnetic field, B, i.e. M = χ M1 • B [18], and can be decomposed into paramagnetic (χ para…”

Section: Introductionmentioning

confidence: 99%

Combined analysis of the low-energy enhancement of the gamma-strength function and the giant dipole resonance

Ngwetsheni

Orce

2019

Hyperfine Interact

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onance and has been investigated along with the effects of the low-energy enhancement of the photon strength function for nuclides in medium-and heavy-mass nuclei. Cubic-spline interpolations to both data sets show a significant reduction of the nuclear dipole polarizability for semi-magic and doubly magic nuclei, with magic numbers N = 28, 50, 82 and 126, which supports shell effects at high-excitation energies from the quasi-continuum to the giant dipole resonance. This work expands on the data analysis of our recent publication in Ngwetsheni and Orce (Phys. Lett. B 792, 335, 2019), which reveals a new spectroscopic probe to search for "old" and "new" magic numbers at high-excitation energies. New results presented in this work suggest an even higher sensitivity of the nuclear polarizability to shell effects when extrapolating the low-energy enhancement at lower gamma-ray energies.

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On the scaling of the paramagnetic susceptibility of atoms, nuclei and nucleons

Cited by 11 publications

References 23 publications

Dispersive effects for the nuclear paramagnetic susceptibility

Dispersive effects for the nuclear paramagnetic susceptibility

How do we infer shell effects at high-excitation energies? A new spectroscopic probe to search for magic numbers

Combined analysis of the low-energy enhancement of the gamma-strength function and the giant dipole resonance

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