Nuclear orientation of 113Cdm, 115Cd and 115Cdm

Chaney, Robert; McDermott, M.N.

doi:10.1016/0375-9601(69)91060-3

Cited by 11 publications

(5 citation statements)

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“…It seems desirable to obtain more experimental information and to better understand the nuclear model assumptions to be made for a theoretical validation of relations (6) and (7). Nevertheless, the Moskowitz-Lombardi rule has often been used to estimate uncertainties arising from hyperfine anomalies for nuclear moments extracted from hyperfine splittings (see, e.g., [5,6]).…”

Section: Introductionmentioning

confidence: 99%

“…In both regions isomeric states exist due to the opposite-parity high-spin orbitals, h11 /2 below N = 82 and i13 /2 below N = 126. Moreover, accurate measurements of nuclear moments exist for 107,109,111,113 Cd [7], and for 115 Cd as well as for the isomers 113m,115m Cd [8], covering nuclear spins of I = 5 /2, 1 /2 and 11 /2. This facilitates an analysis of hfs anomalies.…”

Section: Introductionmentioning

confidence: 99%

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Collinear laser spectroscopy of atomic cadmium

et al. 2015

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Abstract. Hyperfine structure A and B factors of the atomic 5s 5p 3 P2 → 5s 6s 3 S1 transition are determined from collinear laser spectroscopy data of 107−123 Cd and 111m−123m Cd. Nuclear magnetic moments and electric quadrupole moments are extracted using reference dipole moments and calculated electric field gradients, respectively. The hyperfine structure anomaly for isotopes with s1 /2 and d5 /2 nuclear ground states and isomeric h11 /2 states is evaluated and a linear relationship is observed for all nuclear states except s1 /2 . This corresponds to the Moskowitz-Lombardi rule that was established in the mercury region of the nuclear chart but in the case of cadmium the slope is distinctively smaller than for mercury. In total four atomic and ionic levels were analyzed and all of them exhibit a similar behaviour. The electric field gradient for the atomic 5s 5p 3 P2 level is derived from multi-configuration Dirac-Hartree-Fock calculations in order to evaluate the spectroscopic nuclear quadrupole moments. The results are consistent with those obtained in an ionic transition and based on a similar calculation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Collinear laser spectroscopy of atomic cadmium

et al. 2015

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“…The meaning of this observation should be further evaluated in light of possible shell quenching [5,6] against sug- [17] for the states with spin 3/2. High-precision magnetic moments calculated from NMR frequency ratios [25,26] relative to the proton [27] and corrected for diamagnetism [28] are displayed for comparison.…”

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confidence: 99%

Spins, Electromagnetic Moments, and Isomers ofCd107−129

et al. 2013

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The neutron-rich isotopes of cadmium up to the N ¼ 82 shell closure have been investigated by highresolution laser spectroscopy. Deep-uv excitation at 214.5 nm and radioactive-beam bunching provided the required experimental sensitivity. Long-lived isomers are observed in 127 Cd and 129 Cd for the first time. One essential feature of the spherical shell model is unambiguously confirmed by a linear increase of the 11=2 À quadrupole moments. Remarkably, this mechanism is found to act well beyond the h 11=2 shell. DOI: 10.1103/PhysRevLett.110.192501 PACS numbers: 21.10.Ky, 21.60.Cs, 31.15.aj, 32.10.Fn When first proposed, the nuclear shell model was largely justified on the basis of magnetic-dipole properties of nuclei [1]. The electric quadrupole moment could have provided an even more stringent test of the model, as it has a very characteristic linear behavior with respect to the number of valence nucleons [2,3]. However, the scarcity of experimental quadrupole moments at the time did not permit such studies. Nowadays, regardless of experimental challenges, the main difficulty is to predict which nuclei are likely to display this linear signature. The isotopes of cadmium, investigated here, proved to be the most revealing case so far. Furthermore, being in the neighborhood of the ''magic'' tin, cadmium is of general interest for at least two additional reasons. First, theory relies on nuclei near closed shells for predicting other, more complex systems. Second, our understanding of stellar nucleosynthesis strongly depends on the current knowledge of nuclear properties in the vicinity of the doubly magic tin isotopes [4]. Moreover, specific questions concerning the nuclear structure of the cadmium isotopes require critical evaluation, such as shell quenching [5,6], sphericity [7], deformation [8,9], or whether vibrational nuclei exist at all [10]. Some of these points will be addressed here quite transparently, while others require dedicated theoretical work to corroborate our conclusions. In this Letter we report advanced measurements by collinear laser spectroscopy on the very neutron-rich cadmium isotopes. Electromagnetic moments in these complex nuclei are found to behave in an extremely predictable manner. Yet, their description goes beyond conventional interpretation of the nuclear shell model.The measurements were carried out with the collinear laser spectroscopy setup at ISOLDE-CERN. High-energy protons impinging on a tungsten rod produced low-to medium-energy neutrons inducing fission in a uranium carbide target. Proton-rich spallation products, such as cesium, were largely suppressed in this manner. Further reduction of surface-ionized isobaric contamination was achieved by the use of a quartz transfer line [11], which allowed the more volatile cadmium to diffuse out of the target while impurities were retained sufficiently long to decay. Cadmium atoms were laser ionized, accelerated to an energy of 30 keV, and mass separated. The ion beam was injected into a gas-filled radio-frequency Paul trap [12]...

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“…This, however, is the first work in which the IS of a cadmium isomer has been measured. There has also been extensive optical pumping work performed for the oddspin isotopes [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Determination of the isotope shift of115m Cd by a Zeeman scanning method

Moskowitz

Rummel

1975

Z Physik A

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Abstract.We have used an optical pumping-Zeeman scanning technique in order to determine the isotope shift in the 3,261 A resonance line of 43-day, spin-ll/2 l~SmCd. A sample of ~ 5 x 10 ~2 atoms was aligned in the IS 0 diamagnetic ground state by optically pumping the sample with one selected Zeeman-scanned component of the 3P a -3,261 A resonance line from a 11~Cd lamp. The alignment was detected through the modulation of the pumping beam at the nuclear resonance frequency. Thus by Zeeman scanning the F = 9/2 component of the 3P 1 level and using previously determined A-and B-values, we find 6v(l14-115m(9/2))= -4,234(48)MHz and t~4Cd-atsmCd isotope shift=87(48)MHz. We calculate a staggering parameter ?(ltS~Cd)=0.73(26), and a change in mean-square nuclear charge radius 6 (r2) 114' 115m =0.035 (18) fm 2.

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Nuclear orientation of 113Cdm, 115Cd and 115Cdm

Cited by 11 publications

References 1 publication

Collinear laser spectroscopy of atomic cadmium

Collinear laser spectroscopy of atomic cadmium

Spins, Electromagnetic Moments, and Isomers ofCd107−129

Determination of the isotope shift of115m Cd by a Zeeman scanning method

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