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  • 1
    Electronic Resource
    Electronic Resource
    The fine and magnetic hyperfine structure of 87SrF in its X 2Σ+ state (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 5533-5538 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A molecular beam rf–optical double resonance experiment was performed on 87SrF in its naturally occurring abundance ratio. The natural occurring abundances of the strontium isotopes are 86Sr (9.8%), 87Sr(7.02%) and 88Sr (82.5%). Numerous magnetic dipole allowed transitions between ρ-doublets in the X 2Σ+ state were measured to an accuracy of 3 kHz. The observed spectra were analyzed in terms of an effective Hamiltonian which includes the magnetic hyperfine and electric quadrupole interactions arising from the 87 Sr (I=9/2) and 19F (I=1/2) nuclei. The extracted spectroscopic hyperfine parameters were interpreted in terms of a simple molecular orbital picture for the electronic nature of the X 2Σ+ state. A comparison is made to previous results for the more abundant 86SrF and 88SrF isotopic forms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459622
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  • 2
    Electronic Resource
    Electronic Resource
    Fine and magnetic hyperfine structure in the A 2Π and X 2∑+ states of yttrium monoxide (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 598-606 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A molecular beam optical and rf–optical double resonance spectroscopic study of numerous vibrational components in the A2Π3/2–X2∑+ subband of gas phase YO has been performed. The fine and magnetic hyperfine parameters for v=0–4 of the X2∑+ state have been determined. The observed strong vibrational dependence of the spin–rotation parameter γ(X2∑+) is proposed to arise from a perturbation from two as yet unobserved low-lying 2Π states coming from a three open-shell configuration. The magnetic hyperfine parameters for the X2∑+ state can be interpreted in terms of a single unpaired electron model. An estimate for the A2Π excited state dipolar parameter has been established.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454186
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  • 3
    Electronic Resource
    Electronic Resource
    A molecular-beam-optical and radio frequency-optical double-resonance study of the A 2Πr–X 2Σ+ band system of scandium monoxide (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 6168-6174 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A molecular-beam-optical and rf-optical double-resonance study of the A 2 Π (v'=0–2) –X 2Σ+ (v‘=0–2) band systems of gas phase scandium monoxide has been performed. No localized perturbations in the X 2Σ+ state have been observed but strong perturbations in the A 2 Πr (v=1) state were detected. Quantum numbers for the optical spectrum could only be assigned assuming a negative value for the excited state Λ-doubling-type magnetic hyperfine parameter, contrary to current theoretical understanding of this interaction. The ground state magnetic hyperfine parameters can be interpreted in terms of ab initio models for the electronic states of ScO whereas the spin-rotation parameters cannot.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.454455
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  • 4
    Electronic Resource
    Electronic Resource
    Spin–rotation and hyperfine structure in the X 2Σ+ state of yttrium monosulfide by molecular-beam laser-radio-frequency double resonance (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 8415-8419 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The molecular-beam laser-radio-frequency double-resonance method has been used to measure the spin–rotation and magnetic hyperfine structure of yttrium monosulfide (YS) in its X 2Σ+ electronic ground state. The spin–rotation constant γ is found to be positive, unlike that of YO. The Fermi contact and dipolar hyperfine interactions (due to the spin I=1/2 of 89Y) are found to be rather close to the corresponding quantities in YO. The contact hfs constant b in the excited B 2Σ+ state of YS was determined by combining the directly measured X 2Σ+ splitting information with B–X optical hfs observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459279
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  • 5
    Electronic Resource
    Electronic Resource
    Collinear laser and slow-ion-beam apparatus for high-precision laser-rf double-resonance spectroscopy (1988)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 59 (1988), S. 74-80 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new apparatus has been constructed for high-precision hyperfine structure measurement of atomic ions by laser-radio-frequency double-resonance technique involving a slow ion beam and a laser in collinear geometry. The low ion energy (1–1.5 keV) leads to longer interaction time with the applied rf field. Consequently, extremely narrow linewidths of ∼60 kHz have been observed for the first time in such systems. The apparatus has been used for the measurement of hyperfine structure of the 4f7(8S0)5d9D02,3,4,5 metastable levels in 151Eu+ and 153Eu+. The magnetic dipole and the electric quadrupole hyperfine constants, A and B, respectively, have been determined with higher precision (2–3 orders of magnitude).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139969
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  • 6
    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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  • 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
    Hyperfine structure of low-lying even levels of161,163Dy and167Er by atomic-beam laser-rf double resonance (1983)
    Springer
    The European physical journal 311 (1983), S. 251-252 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Radiofrequency measurements of the zero-field hyperfine intervals in low levels of167Er and161,163Dy have been made as part of a systematic study of the second half of the 4fN6s2 configuration of the neutral rare-earth atoms. Almost no precise hfs data exist for this region, and a preliminary analysis indicates systematic differences between ab initio theory and experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01415113
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  • 9
    Electronic Resource
    Electronic Resource
    Hyperfine structure of low-lying even levels of161, 163Dy and167Er by atomic-beam laser-rf double resonance (Short note) (1983)
    Springer
    The European physical journal 313 (1983), S. 366-366 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439491
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  • 10
    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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