Measurements of spectroscopic quadrupole moments of neutron-deficient Au isotopes with quadrupole-interaction-resolved NMR-ON
Abstract
We report on measurements of quadrupole-interaction-resolved nuclear magnetic resonance on oriented nuclei hcp-Co. The results for the magnetic and electric hyperfine splittings are: 193Au: νM = 67.72(2) MHz;νQ = − 15.69(4) MHz;195Au; νM = 71.65(1) MHz; νQ = − 14.34(2) MHz. Taking into account hyperfine anomalies, the magnetic moments are deduced to be: ; . With the known quadrupole moment of 193Au, Q = + 0.664(20), b, the electric field gradient of Au in hcp-Co is deduced to be eq = − 0.977(29) × 1017 V/cm2, with which is obtained for the spectroscopic quadrupole moment of 195Au. In addition, the experimentally known quadrupole splitting frequencies of 186Au, 198Au and 199Au in hcp-Co can be reinterpreted, giving the results: ; ; .
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Cited by (19)
Nuclear Data Sheets for A=186
2022, Nuclear Data SheetsEvaluated spectroscopic data and level schemes from radioactive decay and nuclear reaction studies are presented for 186Lu, 186Hf, 186Ta, 186W, 186Re, 186Os, 186Ir, 186Pt, 186Au, 186Hg, 186Tl, 186Pb, 186Bi, and 186Po. This evaluation for A=186 supersedes the earlier evaluation 2003Ba44 by C. M. Baglin. Highlights of this evaluation are the following: 186Re: Revised %ε and %β− branches. New values are almost same as of the earlier ones. Adopted improved level energy for the long-lived (8+) isomer at 148.2 keV 5 based on the study reported in 2015Ma60 (187Re(n, 2nγ)) compared to 149 keV 7 in previous evaluation (2003Ba44). 186Hg: Discrepancies in the level schemes between 1992Po01 and 1993Ma02 remain to resolve experimentally, arise primarily due to the assigned multipolarity of the ≈607 keV γ transition between the 1228 keV bandhead and the 2+ 621 keV level. See general comments in Adopted Levels, Gammas dataset. 186Tl: From α decay studies, 2020St11 propose spin-parity (2−) for the g.s. and (7+) for the excited level at 0.0+x of level energy of 77 keV 56. From mass measurements, 2014Bo26 propose the (7−) level energy of 20 keV 40 earlier.
Nuclear Data Sheets for A = 198
2016, Nuclear Data SheetsThe 2009 version of Nuclear Data Sheets for A=198 (2009Hu11) has been updated and revised on the basis of the experimental results from various decay and reaction studies before December 2014. The experimental data for all known nuclei with mass number A=198 (Re,Os,Ir,Pt,Au,Hg,Tl,Pb,Bi,Po,At,Rn,Fr) have been revised, updated, and incorporated into the ENSDF data file. The experimental methods, references, Jπ arguments, and necessary comments are given in the text. The adopted levels for 198Re and 198Fr are firstly presented in this evaluation. In addition, Q values have been updated based on 2012Wa38.
Nuclear Data Sheets for A = 195
2014, Nuclear Data SheetsExperimental structure and decay data for all nuclides with mass number A=195 (Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Bi, Po, At, Rn) have been revised, updated, and incorporated into the ENSDF data file. All literature available by March 2014 has been considered. This evaluation supersedes the previous one for this mass chain (Zhou Chunmei, Nuclear Data Sheets 86, 645 (1999), 1999Zh11). The detailed level schemes, decay schemes, experimental reaction and decay data on which they are based are summarized and presented here. References, Jπ arguments, and comments are given in the text. No excited state data are yet available for 195Re and 195Rn. The adopted levels for 195At are firstly presented in this evaluation. In addition, Q values have been updated based on 2012Wa38.
Nuclear Data Sheets for A = 198
2009, Nuclear Data SheetsThe 2002 version of Nuclear Data Sheets for A = 198 (2002Zh04) has been updated and revised on the basis of the experimental results from various decay and reaction studies before June 2008. The experimental data for all known nuclei of A = 198 (Ir,Pt,Au,Hg, Tl,Pb,Bi,Po,At,Rn) have been reevaluated. The experimental methods, references, Jπ arguments, and necessary comments are given in the text. The theoretical internal conversion coefficient (ICC) (and its associated uncertainty) for γ-rays have been interpolated from theoretical values based on the “Frozen Orbital” approximation (2002Ba85) using the BRICC(v2.2) computer program. Summary band-structure drawings and level schemes from both radioactive decay and reaction studies are presented. Also of special interest are the new levels of 198Ir, 198Tl nuclei and identification of new superdeformed bands in 198Pb and 198Po.
Nuclear Data Sheets for A = 199
2007, Nuclear Data SheetsNuclear spectroscopic information for known nuclides of mass number 199 (Os,Ir,Pt,Au,Hg,Tl,Pb,Bi,Po,At,Rn,Fr) with Z = 76 to 87 and N = 123 to 112 have been evaluated and presented together with adopted energies and Jπ of levels in these nuclei. No excited state data are available for 199Os and 199Fr, and very little information is available for levels in 199Ir, 199Rn and 199At. The decay of 199Ir to 199Pt has not been studied. The decay of the 90-min activity of 199Pb to 199Tl is known in detail but remains unpublished in the open literature, while the decay of the 12.2-min isomer remains mostly unknown. The decays of the two activities of 199Tl to 199Pb are not known as separate decay scheme for each of the activities, thus only a composite decay scheme is presented. Similar is the case for the decay of the two activities of 199Po to 199Bi. In (3He,d) and (α,t) studies for 199Au, disagreements are found between two independent contemporary studies. The most detailed structure known is for 199Pb with five magnetic-rotational (MR) dipole bands together with many other dipole bands which are of probable multi-quasiparticle nature. This work supersedes previous evaluations of A = 199 published in update mode by 1994Ar13; as full A-chain updates by 1988Sc02, 1978Ha12 and 1971Le37; and a mid-stream update of 199Pb nuclide by 2001Si44.
Nuclear Data Sheets for A = 193
2006, Nuclear Data SheetsThe present revision of the properties for the nuclides belonging to the A = 193 mass chain contains many improvements, corrections and additions to the material presented in previous evaluations (1998Ar07, Nucl. Data Sheets 83, 921 (1998); 1990Sh30, Nucl, Data Sheets 61, 519 (1990)). Among these are measurement results for quadrupole moments, angular distribution coefficients, half-lives and g-factors, for both previously known and new transitions and levels. In addition, major changes to the previously known status of this mass chain consist in the inclusion of data for new superdeformed bands in 193Pb, and the creation of level schemes for 193Bi, 193Po and 193At. The latter were previously unavailable, except for a very limited attempt in the case of 193Po, which was not confirmed in later work. Furthermore, the 193Os beta decay was re-evaluated in order to account for new absolute intensity measurements.