Isotope shifts, spins and hyperfine structures of 118,146Cs and of some francium isotopes

Coc, A.; Thibault, C.; Touchard, F.; Duong, H. T.; Juncar, P.; Liberman, S.; Pinard, J.; Carré, Michel; Lermé, J.; Vialle, Jean; Büttgenbach, S.; Mueller, A. C.; Pesnelle, A.

doi:10.1016/0375-9474(87)90314-9

Cited by 69 publications

(42 citation statements)

References 16 publications

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“…the information that can be extracted from the IS calculations and used for the PNC analysis is limited by the accuracy of the SMS calculations. Unless adequate methods are a Coc et al [30,31] developed to significantly improve the accuracy of such calculations it is unlikely that the IS data will provide information of any practical use for PNC analysis. The situation is very different for heavier atoms, such as Fr, Tl, etc.…”

Section: Resultsmentioning

confidence: 99%

Calculation of isotope shifts for cesium and francium

2005

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We perform ab initio calculations of isotope shifts for isotopes of cesium (from A=123 to A=137) and francium (from A=207 to A=228). These calculations start from the relativistic Hartree-Fock method and make use of several techniques to include correlations. The field (volume) isotope shift is calculated by means of an all-order correlation potential method and within the singlesdoubles partial triples linearized coupled-cluster approach. Many-body perturbation theory in two different formulations is used to calculate the specific mass shift. We discuss the strong points and shortcomings of the different approaches and implications for parity nonconservation in atoms. Changes in nuclear charge radii are found by comparing the present calculations with experiment.

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Section: Resultsmentioning

confidence: 99%

Calculation of isotope shifts for cesium and francium

2005

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“…The data were not sufficient to confirm these assignments through γ − γ directional correlation measurements. The J π = 1 − spin and parity of the parent is well known, having been measured via high-resolution laser spectroscopy [33].…”

Section: γ-Ray Intensitiesmentioning

confidence: 99%

γ-softBa146and the role of nonaxial shapes atN≈90

Mitchell¹,

Lister²,

McCutchan³

et al. 2016

Phys. Rev. C

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Low-spin states in the neutron-rich, N = 90 nuclide 146 Ba were populated following β-decay of 146 Cs, with the goal of clarifying the development of deformation in Ba isotopes through delineation of their non-yrast structures. Fission fragments of 146 Cs were extracted from a 1.7-Ci 252 Cf source and mass-selected using the CARIBU facility. Low-energy ions were deposited at the center of a box of thin β detectors, surrounded by a high-efficiency HPGe array. The new 146 Ba decay scheme now contains 31 excited levels extending up to ∼2.5 MeV excitation energy, double what was previously known. These data are compared to predictions from the Interacting Boson Approximation (IBA) model. It appears that the abrupt shape change found at N = 90 in Sm and Gd is much more gradual in Ba and Ce, due to an enhanced role of the γ degree of freedom.

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“…15 No correction for the Knight shift and for diamagnetism has been applied. No other narrow resonance signal with S у1% was observed in the frequency region corresponding to fields between 75 and 119 T.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…The magnetic moments of the francium isotopes of interest in this paper have all been measured by high-resolution laser spectroscopy 15 with 212 Fr as common reference and 211 Fr as common calibration isotope. The 5/2 Ϫ ground state of 221 Fr is believed to be a decoupled proton h 9/2 state 21 which, because of the antiparallel coupling of spin and orbital momentum, should show some hyperfine anomaly 22,23 relative to 208 Fr.…”

Section: Discussionmentioning

confidence: 99%

Hyperfine field of francium in iron

et al. 1998

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The hyperfine field of francium in iron has been measured for different isotopes using the method of low-temperature nuclear orientation and samples prepared by ion implantation at Tр1 K. For 208 Fr a nuclear magnetic resonance was observed. From the center frequency L (B ext ϭ0 T)ϭ490.7(4) MHz, we derive the corresponding magnetic hyperfine field as B hf (FrFe)ϭ94.9(4) T. ͓S0163-1829͑98͒05118-2͔

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Isotope shifts, spins and hyperfine structures of 118,146Cs and of some francium isotopes

Cited by 69 publications

References 16 publications

Calculation of isotope shifts for cesium and francium

Calculation of isotope shifts for cesium and francium

γ-softBa146and the role of nonaxial shapes atN≈90

Hyperfine field of francium in iron

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