Spins, moments and charge radii in the isotopic series181Hg-191Hg

Bonn, J.; Huber, G.; Kluge, H.‐J.; Otten, Ernst W.

doi:10.1007/bf01412098

Cited by 157 publications

(56 citation statements)

References 48 publications

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“…Hyperfine interaction constants of the 6s 6p 3p1 state of Hg I and nuclear moments were compiled by Bonn et al [8] for the mass range 181 2OSHg" This compilation included the data obtained by the RADOP technique for the ground states of 181 191Hg ' 205Hg ' and 199mHg. Optical spectroscopy with pulsed lasers on atoms confined in a resonance cell has been applied to the ground and isomeric states of neutron deficient isotopes in the mass range 185-t91Hg.…”

Section: Hyperfine Structure and Nuclear Momentsmentioning

confidence: 99%

“…The values (r2)~ph and fi(r2)~ph are taken from the droplet model [38]. 6(rZ) a'a' was evaluated for a given 2 a' a, in an iterative way starting with a preliminary calculation according to (4) with coefficients C~ from [34] and decomposing this result into a spherical and a deformation part (see (12), (13)) used then in (8). The final results are presented in column 4 of Table 1.…”

Section: Ov~ia'=(a'-a)/(a'a) X {Mnus I+ Ms~s~}mentioning

confidence: 99%

“…The method of 7-radiation detected optical pumping (7-RADOP) was first developed to investigate the isotopes Z~ [-4] and 199mHg [5]. Measurements by the fl-radiation detected optical pumping method (fi-RADOP) extended our knowledge of nuclear ground state properties for the odd Hg isotopes into the mass range 181 < A <_ 191 and to 2~ [6], [7], [8]. One of the striking features resulting from this experiment was the large change in the 6 <r2> value between the isotopes 187Hg and 185Hg, which was attributed to a sudden oblateprolate shape transition [6].…”

Section: Introductionmentioning

confidence: 99%

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Isotope shift of182Hg and an update of nuclear moments and charge radii in the isotope range181Hg-206Hg

Ulm

Bhattacherjee

Dabkiewicz

et al. 1986

Z. Physik A - Atomic Nuclei

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106

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Section: Hyperfine Structure and Nuclear Momentsmentioning

confidence: 99%

Section: Ov~ia'=(a'-a)/(a'a) X {Mnus I+ Ms~s~}mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Isotope shift of182Hg and an update of nuclear moments and charge radii in the isotope range181Hg-206Hg

Ulm

Bhattacherjee

Dabkiewicz

et al. 1986

Z. Physik A - Atomic Nuclei

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106

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“…However, in near-closed-shell nuclei, simple structures may occur as a result of the spherical symmetry breaking up. The cadmium isotopic chain studied here appears to provide one such instance of simplicity.Already [4,5] or states in the same nucleus [6]. Thus far, radial changes of such magnitude appear to be uncommon, the other prominent examples being the halo structures in light nuclei [7][8][9][10][11] and the onset of deformation at N ¼ 60 [12][13][14][15][16].…”

mentioning

confidence: 99%

Simple Nuclear Structure inCd111–129from Atomic Isomer Shifts

et al. 2016

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Isomer shifts have been determined in [111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126][127][128][129] Cd by high-resolution laser spectroscopy at CERN-ISOLDE. The corresponding mean square charge-radii changes, from the 1=2 þ and the 3=2 þ ground states to the 11=2 − isomers, have been found to follow a distinct parabolic dependence as a function of the atomic mass number. Since the isomers have been previously associated with simplicity due to the linear mass dependence of their quadrupole moments, the regularity of the isomer shifts suggests a higher order of symmetry affecting the ground states in addition. A comprehensive description assuming nuclear deformation is found to accurately reproduce the radii differences in conjunction with the known quadrupole moments. This intuitive interpretation is supported by covariant density functional theory. DOI: 10.1103/PhysRevLett.116.032501 Complexity is known to dominate the nuclear state, hence, sustaining the need for theoretical input to nearly every experimental work in order to disentangle the nuclear problem down to a set of basic concepts, e.g., shell structure, pairing, "magic" numbers, deformation, etc. However, in near-closed-shell nuclei, simple structures may occur as a result of the spherical symmetry breaking up. The cadmium isotopic chain studied here appears to provide one such instance of simplicity.Already [4,5] or states in the same nucleus [6]. Thus far, radial changes of such magnitude appear to be uncommon, the other prominent examples being the halo structures in light nuclei [7][8][9][10][11] and the onset of deformation at N ¼ 60 [12][13][14][15][16]. Cadmium and mercury are analogues in terms of their charge distributions since both incorporate an open shell with two protons less than a magic number, respectively, Z ¼ 50 and Z ¼ 82. Despite the similarities, the cadmium case presented here shows no abrupt changes of the nuclear size. Instead, one observes a small-to-moderate effect on the radii characterized by regularity which may be attributed to the unique-parity h 11=2 orbital.In this Letter, we report on the simplicity of high-precision isomer shifts derived from collinear laser spectroscopy on the neutron-rich cadmium isotopes towards the N ¼ 82 shell closure. A comprehensive model resting on some of the basic concepts in nuclear physics suggests an apparent link between the 11=2 − radii and quadrupole moments. The credibility of such an interpretation is examined quantitatively within a relativistic mean field calculation.The work was carried out with the collinear laser spectroscopy setup at the CERN-ISOLDE radioactivebeam facility. Of interest were the odd neutron-rich

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“…The excitation energy of this isomer reaches a minimum close to the neutron mid-shell [Aud12], meaning that thallium better matches the shape-coexistence picture of the neighboring lead isotopes, with close to spherical ground states and deformed configurations at higher energy (see [Bar13] for a recent update on the measured charge radii). The mercury isotopes, however, exhibit a shape transition at N = 105 [Bon72;Bon76], with a strong odd-even staggering of the charge radii [Kuh77;Ulm86], suggesting the proximity in energy of nuclear configurations with significantly different shapes. This behavior is a precursor of what is observed in the gold chain and is supported by recent data from the spectroscopy of even-even mercury isotopes [Bre14].…”

Section: Neutron-deficient Gold-thallium Nucleimentioning

confidence: 99%

Binding Energy of Strongly Deformed Radionuclides

Manea

2015

Springer Theses

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The most complex nuclei are situated between the magic and the mid-shell ones, in regions known for sudden changes of the trends of nuclear observables. These are the so-called shape-transition regions, where the nuclear paradigm changes from the vibrational liquid drop to the static rotor. With few exceptions, nuclei in these regions are radioactive, with half-lives dropping into the millisecond range.Complementing the information obtained from the low-lying excitation spectrum, nuclear binding energies and mean-square charge radii are among the observables most sensitive to these changes of nuclear structure. In the present work, a study of the shapetransition phenomenon is performed by measurements of radioactive nuclides produced by the ISOLDE facility at CERN. The masses of the neutron-rich rubidium isotopes 98−100 Rb and of the neutron-deficient gold isotopes 180,185,188,190,191 Au are determined using the Penning-trap mass spectrometer ISOLTRAP. The mass of 100 Rb is determined for the first time. Significant deviations from the literature values are found for the isotopes 188,190 Au. A new experimental method is presented, using a recently developed multi-reflection time-of-flight mass spectrometer as a beam-analysis tool for resonanceionization laser spectroscopy. The new method opens the path to measurements of atomic hyperfine spectra with ISOLTRAP, from which charge radii and electromagnetic moments of radioactive nuclides can be extracted.The properties of the studied nuclides map the borders of two prominent regions of quadrupole deformation, which constrain the fine balance between pairing and quadrupole correlations in the nuclear ground states. This balance is studied by the Hartree-FockBogoliubov (HFB) approach. The sensitivity of the shape-transition phenomenon to the strength of pairing correlations is demonstrated. In particular, the strong odd-even staggering of charge radii in the mercury isotopic chain is shown to result in the HFB approach from the fine interplay between pairing, quadrupole correlations and quasiparticle blocking.

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Spins, moments and charge radii in the isotopic series181Hg-191Hg

Abstract: Abstract. The hyperfine structure splitting and the isotope shift in the (6 s 2 ~S0-6 s 6 p 3p~,

Cited by 157 publications

References 48 publications

Isotope shift of182Hg and an update of nuclear moments and charge radii in the isotope range181Hg-206Hg

Isotope shift of182Hg and an update of nuclear moments and charge radii in the isotope range181Hg-206Hg

Simple Nuclear Structure inCd111–129from Atomic Isomer Shifts

Binding Energy of Strongly Deformed Radionuclides

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