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  • 1
    Electronic Resource
    Electronic Resource
    Ground state hyperfine structure of95Mo and97Mo (1974)
    Springer
    The European physical journal 266 (1974), S. 271-274 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01668819
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  • 2
    Electronic Resource
    Electronic Resource
    Hyperfine structure and nuclear moments of99Ru and101Ru (1977)
    Springer
    The European physical journal 280 (1977), S. 217-226 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01434343
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  • 3
    Electronic Resource
    Electronic Resource
    Hyperfine structure of seven atomic levels of91Zr and the91Zr nuclear electric quadrupole moment (1978)
    Springer
    The European physical journal 286 (1978), S. 125-131 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01408965
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  • 4
    Electronic Resource
    Electronic Resource
    High precision hyperfine structure measurements in185Re and187Re (1981)
    Springer
    The European physical journal 302 (1981), S. 281-290 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure of the atomic levels 5d 5 6s 2 6 S 5/2 and4 P 5/2 in185Re and187Re has been studied with high precision by atomic-beam magnetic-resonance. Additional measurements were performed in the 5d 5 6s 2 4 G 5/2 and 5d 6 6s 6 D 9/2 states of187Re. For the interpretation of the results eigenvectors in intermediate coupling have been derived by a least squares fit of all known levels of the configurations (5d+6s)7. The ratioB(185Re)/B(187Re) is the same for the6 S 5/2 and the4 P 5/2 state within the error limits of 6 parts in 105. Combining the present results with the known hyperfine structure data of186Re and188Re we find the magnetic-dipole hyperfine anomalies for the isotopic series185−188Re.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414258
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  • 5
    Electronic Resource
    Electronic Resource
    Hyperfine structure measurements in metastable states of165Ho (1982)
    Springer
    The European physical journal 307 (1982), S. 193-200 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine structure constants and the electronic g J factor of the state 4f 11 6s 2 4 I 11/2 belonging to the holmium ground multiplet have been measured using the atomic beam magnetic resonance technique combined with a state-selective laser-induced detection of the resonant atoms. By the same method the g J factor of the level 4f 116s 24 I 9/2 was determined, while the hyperfine structures of this metastable state and of two high-lying even parity states have been investigated by high resolution laser spectroscopy. The results for the experimentalA andB factors of all four members of the ground multiplet allow a least-squares evaluation of the three magnetic dipole and the three electric quadrupole effective radial parameters for the configuration 4f 11 6s 2 of holmium, yielding an accurate value for the spectroscopic nuclear electric quadrupole moment:Q hfs(165Ho)=2.716(9)b (uncorrected for quadrupole shielding). From a comparison to the quadrupole moments measured in mesic holmium atoms the shielding factor could be estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01438640
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  • 6
    Electronic Resource
    Electronic Resource
    A new method for the production of atomic beams of highly refractory elements and first atomic beam magnetic resonances in Ta181 (1970)
    Springer
    The European physical journal 230 (1970), S. 329-336 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new universal method for the production of atomic beams of highly refractory elements has been developed. The beams of free atoms are produced by locally heating a small area on a target consisting of the material to be evaporated. The local heating is achieved via the focussed electron beam of a commercial electron gun. The atomic beams so obtained are suitable for studying hyperfine structures by the atomic beam magnetic resonance method. The first observedrf resonances in the ground state4 F 3/2 and the first excited state4 F 5/2 of Ta181 are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01403122
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  • 7
    Electronic Resource
    Electronic Resource
    Hyperfine structure measurements in the ground states5 F 5,5 F 4,5 F 3 and5F2 of99Ru and101Ru with the atomic beam magnetic resonance method (1974)
    Springer
    The European physical journal 269 (1974), S. 189-193 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01668681
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  • 8
    Electronic Resource
    Electronic Resource
    Configuration interaction in the hyperfine structure of 4d-shell atoms (1981)
    Springer
    The European physical journal 302 (1981), S. 369-370 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Relativistic self-consistent-field calculations of the radial hyperfine integrals have been performed for neutral atoms from Z=39 to Z=47. The comparison with experimental results gives an estimate of configuration interaction effects on the hyperfine interaction of these atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01414274
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  • 9
    Electronic Resource
    Electronic Resource
    Ground state hyperfine structure and nuclear magnetic dipole moments of177Hf and179Hf (1973)
    Springer
    The European physical journal 260 (1973), S. 157-164 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using the atomic beam magnetic resonance method the experimental hyperfine structure data of the 5d 26s 2 3 F 2 ground state of177Hf and179Hf described in a previous paper [1] have been completed. After applying corrections due to perturbations by other fine structure levels of the configuration 5d 26s 2 we got the following multipole interaction constants: $$\begin{gathered} ^{177} Hf:A = 113.43314 (7) MHz B = 624.3293 (13) MHz \hfill \\ C = 0.27 (18) KHz D = 0.045 (40) KHz \hfill \\ ^{179} Hf: A = - 71.42891 (9) MHz B = 705.5181 (24) MHz \hfill \\ C = - 0.43 (20) MHz D = 0.07 (6) KHz. \hfill \\ \end{gathered} $$ By measuring rf transitions at magnetic fields between 1100 and 1550 Gauss the nuclear ground state magnetic dipole moments were determined. The results are: $$\mu _I (^{177} Hf) = 0.7836 (6) \mu _N , \mu _I (^{179} Hf) = - 0.6329 (13) \mu _N $$ (uncorrected for diamagnetic shielding).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448975
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  • 10
    Electronic Resource
    Electronic Resource
    Hyperfine structure investigations in the4F9/2 atomic ground state of191Ir and193Ir (1973)
    Springer
    The European physical journal 263 (1973), S. 341-346 
    Details
    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
    URL: http://dx.doi.org/10.1007/BF01391592
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