Determination of the isotope shift in theD 1 line between197Au and195Au

Kluge, H.‐J.; Kremmling, H.; Kolomenskiǐ, A. A.; Streib, J.; Wallmeroth, K.

doi:10.1007/bf01413748

Cited by 18 publications

(8 citation statements)

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“…Information about the quadrupole moment exists only for the stable isotope 197Au [11]. Recently [12][13][14] IS have been measured in the resonance line between 19VAu (stable), and 19SAu (T1/2 = 183d) isotopes at Mainz as a pilot project of systematic IS-measurements for a series of short-lived Au-isotopes at the ISOLDE facility. In this project measurements are planned also for some 6s-ns two-photon transitions.…”

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confidence: 99%

Volume isotope shifts in low lying transitions of Au I

Rosén¹,

Fricke

Torbohm

1984

Z Physik A

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Electronic factors in the volume isotope shift have been calculated in an ab initio way with the relativistic Dirac-Fock method for a number of different optical single/and two-photon transitions in Au I. The agreement with a semi-empirical method is within 10 % for the resonance transition. For this one and a few other transitions the effect of core excitation has been analyzed with the Multi-configuration Dirac-Fock method as well, and it was found to reduce the electronic factor in the order of 5 %.Programs for measurements of nuclear spins, hyperfine structure constants, and isotope shifts (IS) for series of neutron-deficient as well as neutron-rich isotopes have been going on during the last years at the ISOLDE facility at CERN [1][2][3][4][5]. The objective of these investigations is to get information on the single particle structure of the investigated nuclei, to follow trends of nuclear properties for series of isotopes, and isotones as well as to test the validity of different nuclear models [6]. The measurements give the nuclear spins directly, while the evaluation of nuclear moments for a certain isotope, and change of nuclear charge radii between isotopes, requires knowledge of the electronic factor for that particular interaction [7]. The magnetic ground state hyperfine structure, and the nuclear spins have been determined for a number of radioactive Au-isotopes [8][9][10] by the atomicbeam magnetic-resonance method. Information about the quadrupole moment exists only for the stable isotope 197Au [11]. Recently [12][13][14] IS have been measured in the resonance line between 19VAu (stable), and 19SAu (T1/2 = 183d) isotopes at Mainz as a pilot project of systematic IS-measurements for a series of short-lived Au-isotopes at the ISOLDE facility. In this project measurements are planned also for some 6s-ns two-photon transitions. Nuclear data properties, derived from these measurements, then are planned to be used for comparison with data for neighbouring isotopes of Os, Ir, Pt, Hg, TI, and Pb [5,6].Recently, relativistic Multi-configuration Dirac-Fock (MCDF) wave functions, coupled to good angular momentum J, have been obtained for low lying states of Ba I and Ba II [15]. Good agreement was achieved with an electronic factor for the volume isotope shift, evaluated from isotope shifts in muonic X-rays [16], although there is some discrepancy to more recently published muonic X-ray data [17]. The reason for this discrepancy is at present not understood. Further, a comparison of experimental slopes of lines, obtained by a King plot analysis, was found to be reproduced well by these wave functions. Also the J-dependence of the volume IS of the resonance transitions in BaII was found to be in complete agreement with the experimental values [18,19]. These calculations are extended at present to all elements in group IIa and IIb of the periodic table [20]. As a continuation of those calculations we present in this paper electronic factors for a number of transitions within the AuI spectrum, which will be usef...

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confidence: 99%

Volume isotope shifts in low lying transitions of Au I

Rosén¹,

Fricke

Torbohm

1984

Z Physik A

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“…In the preceding publication [1], we reported on a first determination of an IS in Au by polarization and resonance fluorescence spectroscopy. Polarization spectroscopy [-27] has two important advantages: It is Doppler free and the photomultiplier monitoring the probe beam (which passes two crossed polarizers with the resonance cell in between) can be positioned far away from the resonance cell.…”

Section: Experimental Methodsmentioning

confidence: 98%

“…In the preceding paper [1], we used c~95'197= -50(5)GHz/fm 2 obtained by atomic spectroscopic data (HFS and the Fermi-Goudsmit-Segre formula). A recent calculation of the screening factor fi by P. Aufmuth [63] yielded fi= 1.14, which results in a reduction of c a to c1=-47.5(5.0) GHz/fm 2.…”

Section: Magnetic Hyperfine Structure and Isotope Shift In The D 1-limentioning

confidence: 99%

“…In a preceding paper [1], we reported on a first determination of an isotope shift (IS) in Au between the only stable isotope 197Au and the longlived one 195Au (T1/2=183 d). In this paper, we report on an extension of these measurements to the short-lived isotopes 19~ performed at the on-line mass separator ISOLDE/CERN, Geneva.…”

Section: Introductionmentioning

confidence: 98%

“…In the case of 197Au, A(Zs1/z)=3049.660092 (7)MHz has been obtained by atomic-beam-magnetic-resonance (ABMR) [23] and A(zPlj2)=337.5(7.5)MHz has been obtained by optical spectroscopy [13]. The IS between isotopes with mass number A and A' is given by [24] as (1) where the first term represents the field shift and the latter is the sum of the normal and specific mass shift:…”

Section: Introductionmentioning

confidence: 99%

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Isotope shifts of neutron-deficient gold isotopes with 193?A?190

et al. 1985

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The isotope shift between 197Atl (stable) and the radioactive Au isotopes 19~ 191Au, 192Au and 193Au were determined by resonance fluorescence spectroscopy in the 6sZS1/2-6pZP1/2. 2=267.6nm line. The unstable Au isotopes were produced at the ISOLDE mass separator at CERN. The nuclei were investigated semi on-line in a resonance vessel, heated to 1,400~The results are (~v 190'197= -11.12(39) GHz, 6V191'197=--9.67(12) GHz, GHz, 0V193't97=--6.29(ll) GHz, corresponding to a change of the mean-square charge radius by 6~r2) 19~ =0.261(12) fm 2, 6(r2)19a,197=0.227(5)fm2, 6(rz)192,197=0.195 (5)

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