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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 266 (1974), S. 271-274 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the ground state 4d 5 5s 7 S 3 of95Mo and97Mo has been measured by the atomic beam magnetic resonance technique with the following results:95Mo:A=−208.582060(10)MHz,B=37.050 (100) kHzC=−30 (10) Hz,D=−3 (3) Hz97Mo:A=− 212.980930 (10) MHz,B−69.990(140)kHzC=−5 (10) Hz,D=0 (3) Hz. After application of corrections calculated according to second order perturbation theory, the hyperfine structure constants became:95Mo: Ac=−208.582560(290)MHz,B c =16.920(4300)kHzC c=−30(270) Hz,D c =− 3 (50) Hz97Mo: Ac=212.981450(300) MHz,B c =−90.780(4400)kHzC c=−6(270) Hz,D c =0 (50) Hz. With the known ratio ofg I(95Mo)/g I(97Mo) [1] a calculation of the hyperfine anomaly yields:95 Δ 97=−0.01009(17)%. The ratio of the uncorrectedB factors isB(97Mo)/B(95Mo)=−1.8890(47). Because of the relatively large effects of second order hyperfine structure, the ratio of the correctedBfactors differs considerably from the ratio of the uncorrectedB factors. From the correctedB factors the electric quadrupole moments may be evaluated by means of calculated radial integrals [2]. The results are:Q (95Mo)=−0.019(12)barns,Q(97Mo)=0.102(39)barns.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 275 (1975), S. 193-196 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the two multiplets 4d 45s 6 D and 4d 35s 2 4 F of93Nb has been studied by the atomic-beam magnetic-resonance method. After applying corrections due to effects of off-diagonal hyperfine and Zeeman interactions the hyperfine interaction constantsA andB and the electrong factors gJ are determined for all nine levels of the two multiplets.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 275 (1975), S. 197-202 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The experimental data on the hyperfine structure of93Nb are analysed with respect to the effective-operator formalism. Using eigenvectors derived from a least squares fit to the excitation energies of all known levels of the configurations 4d 4 5s and 4d 35s 2 the effective radial parameters of the magnetic dipole and electric quadrupole interaction are determined. The comparison with relativistic calculations gives an estimate of the effects due to configuration interaction. The value found for the nuclear electric quadrupole moment isQ=−0.36(7) barns.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 280 (1977), S. 217-226 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The atomic-beam magnetic-resonance method in combination with the triple resonance technique has been used to determine the nuclear magnetic dipole moments of99Ru and101Ru. The moments are deduced fromrf transition measurements in the5F5 and5F4 states at magnetic fields between 770 and 2400 Oe. In order to reduce the part of the uncertainty of the moments which arises from the uncertainty of the hyperfine structure constants more precise values of the constants than those available up to now were determined from low field measurements. After making corrections for hyperfine and Zeeman interactions with neighbouring atomic states we obtain the following values for the magnetic dipole moments:μ 99=−0.6381 (51)μ N andμ 101=−0.7152 (60)μ N (uncorrected for diamagnetic shielding). The results of the present work combined with the results of an earlier hyperfine structure investigation in the5F multiplet are analysed with respect to the effective-operator formalism. From this analysis we obtain the following values for the electric quadrupole moments:Q 99=0.076 (7) b andQ 101=0.44 (4) b (uncorrected for Sternheimer shielding or antishielding).
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fourteen transitions in ReI, starting from high-lying metastable states belonging to the configurations (5d+6s)7, have been studied by laser-induced fluorescence in a collimated atomic beam, and accurate values for the isotope shifts in these transitions as well as for the hyperfine structure constants of 13 metastable and 9 excited states have been obtained. In addition, high precision measurements of the hyperfine structure of the states 5d 5 6s 2 4 D 7/2 and 5d 6 6s 6 D 1/2, 3/2, 5/2, 9/2 have been performed using the atomic beam magnetic resonance technique coupled with laser-induced state-selective detection of metastable atoms. The analysis of the hyperfine structure data yields experimental evidence for far configuration mixing effects on the off-diagonal spin-dipole matrix elements. The phenomenological interpretation of the isotope shifts shows the significance of off-diagonal field-shift effects.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The5d 76s2 4F9/2 atomic ground state of191Ir and193Ir has been studied using the atomic-beam magnetic-resonance method. The results are:193Ir:g J(4F9/2)=1.29694 (3)191Ir:Δv(4F9/2; F=6↔F=5)=659.26496 (12) MHzΔv( 4F9/2; F=5↔F=4)=189.44002 (09) MHzΔv( 4F9/2; F=3↔F=4)=84.05040 (80) MHzA=57.52148 (04) MHzB=471.20425 (57) MHzC=−0.020 (30) kHz193Ir:Δv( 4F9/2; F=6↔F=5)=660.09043 (12) MHzΔv( 4F9/2; F=5↔F=4)=224.47848 (13) MHzΔv( 4F9/2; F=↔F=4)=33.53453 (89) MHzA=62.65556 (05) MHzB=426.23546 (64) MHzC=0.020 (30) kHz Using the magnetic dipole moments known by NMR-technique [1] we obtained for the electric quadrupole moments as calculated from the hyperfine interaction constantsA andB:Q(191Ir)=0.78 (20) barns,Q(193Ir)=0.70 (18) barns (uncorrected for core polarization effects). A calculation of the hyperfine anomaly yields:191 Δ 193=−0.00023 (10). The ratio of theB factors which should be the same as for the quadrupole moments turned out to be:B(191Ir)/B(193Ir)=Q(191Ir)/Q(193Ir)=1.105502(3).
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the four lowest levels5 F 5, 4, 3, 2 of the5 F ground state multiplet arising from the configuration 4d 7 5s in99Ru and101Ru has been studied by the atomic — beam magnetic — resonance technique. After applying corrections due to the effects of off-diagonal hyperfine mixing we obtain the following multipole interaction constants:99Ru:A(5 F 5)=−204.5514(33) MHzB(5 F 5)=27.281 (62) MHzA 5 F 4=−163.6845(36) MHzB(5 F 4)=17.455(52) MHzA 5 F 3=−135.0294(37) MHzB(5 F 3)=10.164(50) MHzA(5 F 2)=− 82.5325(27) MHzB(5 F 2)=5.457(22) MHz101Ru:A(5 F 5)=−229.2881(33) MHzB(5 F 5)=158.934(62) MHzA(5 F 4)=−183.4744(36) MHzB(5 F 4)=101.799(52) MHzA(5 F 3)=−151.3502(38) MHzB(5 F 3)=59.323(50) MHzA(5 F 2)=−92.4974(27) MHzB(5 F 2)=31.869(23) MHz. The magnetic dipole and the electric quadrupole moments of the99Ru and101Ru nuclear ground states as calculated from these constants are the following:μ I (99Ru)=−0.594(119) nmQ(99Ru)=0.077 (15) barnsμ I (101Ru)=−0.666(133)nmQ(101Ru)=0.45 (9) barns. From measurements of the Zeeman effect in the even isotope102Ru we find the followingg J -factors for the5 F ground multiplet:g J (5 F 5)=1.397741(20)g J (5 F 4)=1.347604(20)g J (5 F 3)=1.248988(20)g J (5 F 2)=1.001120(3).
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 283 (1977), S. 303-308 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic-dipole hyperfine interaction constantsA of low-lying metastable atomic levels in91Zr,181Ta,183W, and191Ir determined from atomic-beam magnetic-resonance investigations are analyzed with respect to the effective-operator formalism. Similar results for other 4d- and 5d-shell atoms are also tabulated. The experimental results for the effective 〈r −3〉 values are compared with relativistic predictions for the 4d N 5s and 5d N 6s 2 series.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 286 (1978), S. 125-131 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the low-lying atomic levels 4d 2 5s 2 3 F 2, 3, 4 and 4d 3 5s 5 F 2, 3, 4, 5 of91Zr has been studied using the atomic-beam magnetic-resonance method. Using intermediate coupling wave functions derived for the configurations (4d+5s)4 the experimental data are analysed with respect to the effective operator formalism. The effective radial parameters of the magnetic dipole and electric quadrupole interaction are determined for the two configurations 4d 2 5s 2 and 4d 3 5s and are compared with relativistic calculations. The value obtained for the electric quadrupole moment of the91Zr nuclear ground state isQ=− 0.21(2) barn (uncorrected for core polarization effects).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 317 (1984), S. 237-240 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic dipole hyperfine interaction constantsA of the atomic ground state3 D 3 and of the first excited state3 D 3 in195Pt have been measured by atomic beam magnetic resonance. The electronicg J factors of these states were determined from the Zeeman splitting in194Pt. Using intermediate coupling wave functions derived for the configurations (5d+6s)10 effective hyperfine radial integrals are evaluated.
    Type of Medium: Electronic Resource
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