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  • 1990-1994  (3)
  • 1985-1989  (10)
  • 1980-1984  (12)
  • 1975-1979  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance on oriented109In(4.2h) and110In(4.9h) after recoil implantation into Fe (1981)
    Springer
    The European physical journal 300 (1981), S. 339-344 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Radioactive109In(j π=9/2+;T 1/2=4.2h) and110In(j π=7+;T 1/2=4.9h) were produced via the109Ag (α, xn) reactions and recoil-implanted into Fe foils. With the technique of nuclear magnetic resonance on oriented nuclei the magnetic hyperfine splittings were investigated in external magnetic fieldsB 0=0.5...4.2 kG. The zero-field splitting were measured as 268.9(2)MHz and 147.3(3)MHz for109InFe and110InFe, respectively. With the known hyperfine fieldB HF(InFe)=−286.6(5) kG the nuclearg-factors are deduced asg(109In)=1.231(3) andg(110In)=0.674(2). Our result for109In shows that theπ g 9/2 g-factors vary by only ∼0.1% betweenA=109 and 115. For the |π 9/2 vd 5/2〉7+ of110In the additivity relation of magnetic moments is fulfilled to on accuracy of 0.3(3)%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01419866
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  • 2
    Electronic Resource
    Electronic Resource
    Theg-factor of the 9/2+ [624] ground state of183Os (1980)
    Springer
    The European physical journal 295 (1980), S. 345-347 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine interaction of183OsFe has been studied with nuclear magnetic resonance on oriented nuclei after recoil implantation. Taking into account the resonance displacement due to quadrupole interaction |gμ N H HF/h|=149.9(2) MHz has been found. WithH HF=−1,115(20) kG theg-factor of the 9/2+ [624] ground state of183Os is deduced asg=(−)0.176(3).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412947
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  • 3
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance on oriented192Ir in Fe and Ni (1980)
    Springer
    The European physical journal 295 (1980), S. 385-400 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine interaction of192Ir nuclei as dilute impurities in Fe and Ni has been investigated with NMR on oriented nuclei. With the use of highly dilute and pure alloys the line widths could be reduced so far that the quadrupole splitting of192IrFe and192IrNi could be resolved. Taking hyperfine anomalies into account the ground state nuclear moments of192Ir are deduced as |μ|=1.924(10)μ N andQ=2.36(ll) b. The hyperfine field of IrNi was investigated as a function of the Ir concentrationc between 0.01 at % and 5 at %. The dependence ofH HF onc was found to be significantly smaller than that reported from Mössbauer effect measurements. Forc=0.01 at %H HF=−454.7(2.3)kG is deduced. The resonance shift with an external magnetic field has been studied precisely, yieldingK=0.012(23) andK=0.026(12) for the Knight-shift of192Ir in Fe and Ni, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412952
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  • 4
    Electronic Resource
    Electronic Resource
    Nuclear magnetic resonance on oriented194Ir (T 1/2=19.4 h) in Fe and Ni (1982)
    Springer
    The European physical journal 306 (1982), S. 73-78 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The hyperfine interaction of194Ir (j π =1−;T 1/2=19.4 h) in Fe and Ni has been investigated with the technique of nuclear magnetic resonance on oriented nuclei. For both systems the electronic-orbital-momentum induced electric quadrupole splitting could be resolved. The magnetic and electric hyperfine splitting frequencies,v M =¦gμ N B HF/h¦ andv Q =e 2 qQ/h, respectively, were measured as:194IrFe:v m =408.54 (23) MHz;v q =−2.47(20) MHz;194IrNi:v M =135.24(5) MHz;v q =−1.23 (3) MHz. Taking into account a 3% uncertainty arising from hyperfine anomalies theg-factor is deduced as ¦g¦=0.39 (1). The electric quadrupole moment,Q=+0.352 (18)b, is slightly smaller than expected from the known systematics of deformation parameters in this mass region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413411
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  • 5
    Electronic Resource
    Electronic Resource
    A mini transmissionγ-ray Compton polarimeter and measurements of the sign of magnetic moments of radioactive nuclei (1991)
    Springer
    The European physical journal 340 (1991), S. 235-239 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ky ; 29.75.+x ; 76.80.+y
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A mini transmissionγ-ray Compton polarimeter was developed for the measurement of the sign of magnetic moments of radioactive nuclei with low-temperature nuclear orientation. The signs of the magnetic moments of the following isotopes were determined:193Os [μ=+0.7297(16)μ N];191m Ir [μ=+6.20(9)μ N];192Ir [μ=+1.924(10)μ N];194Ir [μ=+0.39(1)μ N];195m Pt [μ=−0.605(15)μ N].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01294670
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  • 6
    Electronic Resource
    Electronic Resource
    Nuclear orientation study of182Ta in 2H-TaS2 (1983)
    Springer
    Hyperfine interactions 16 (1983), S. 863-866 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Quadrupole-interaction nuclear orientation experiments have been performed on182Ta (jπ=3−1; T1/2=115d) in 2H-TaS2. γ-anisotropies up to ∼ 30 % have been observed at a temperature of ∼ 8 mK, which, however, is only about half of the value expected taking into account known results of TDPAC measurements on181Ta in 2H-TaS2. In principle, matrices of dichalcogenides could be well suited for nuclear quadrupole resonance on oriented nuclei (NQR-ON) experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02147383
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  • 7
    Electronic Resource
    Electronic Resource
    Detection on NMR via the anisotropy of X-rays (X-NMR-ON) (1985)
    Springer
    Hyperfine interactions 22 (1985), S. 163-166 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Nuclear magnetic resonance on oriented nuclei has been detected for the first time via the destruction of the anisotropy of characteristic Lx-rays. The new method can be applied to isomeric states which decay only via highly converted transitions, for which the standard NMR-ON technique — detection of NMR via the anisotropy of γ-rays — is not applicable. The X-NMR-ON technique has been used to measure the magnetic hyperfine splitting of193mpt (Iπ=1322+; E=149.8 keV; T1/2= 4.3 d) to be ¦ gμ NBHF/h¦=111.3 (3) MHz. with the known hyperfine field of −1280(27) kG the magnetic moment of193mpt is deduced to be ¦μ¦=0.7417(14) μN. This magnetic moment differs strongly from the known magnetic moments of the 13/2+ isomeric states in Hg and Pb and195mPt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02063987
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  • 8
    Electronic Resource
    Electronic Resource
    Nuclear orientation at isolde/cern (1988)
    Springer
    Hyperfine interactions 43 (1988), S. 139-149 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A facility for Nuclear Implantation into Cold On-Line Equipment (NICOLE) is being installed at the new on-line isotope separator ISOLDE 3 at CERN. The first on-line run was in the beginning of July 1988. The low temperature equipment has been successfully tested and first off-line experiments on various isotopes have been performed. NMR/ON has been done on vaious isotopes (Co, Xe, Pt, Au) in iron host. First experience with the top-loading dilution refrigertor (Oxford Instruments Limited) shows that it performs very well. The cooling power is 400 μW at 100 mK and 34 μW at 25 mK. The base temperature can be kept continuously well below 5 mK. NMR/ON can be performed at temperatures below 5.5 mK. The base temperature on-line is expected to be lower then 6 mK. The sample can be cooled down from room temperature to 10 mK within two hours, to 6 mK within 3 hours which is not only important for off-line but also for on-line experiments when samples have to be changed to remove long lived daughter activity. The latest results will be reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02398294
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  • 9
    Electronic Resource
    Electronic Resource
    Nicole: New on-line orientation facility at ISOLDE/CERN (1990)
    Springer
    Hyperfine interactions 59 (1990), S. 83-90 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents off-line and on-line orientation results obtained with the new on line nuclear orientation device NICOLE in CERN. Magnetic moments of187,185Pt g and186Ir m , electric quadrupole moment ratios between Pt isotopes with mass number 185, 187 and 189, the spin of the 2 h isomer of186Ir and a new decay scheme of184Au involving a metastable state are established. The shape variation versus mass number of the Pt isotopes leads to sign change of the spectroscopic quadrupole moment between A=187 and 185.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02401196
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  • 10
    Electronic Resource
    Electronic Resource
    Nuclear orientation of recoil-implanted52Mn in Au down to 3 mK (1977)
    Springer
    Journal of low temperature physics 28 (1977), S. 551-570 
    Details
    ISSN: 1573-7357
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Measurements of the γ-ray anisotropy of recoil-implanted52Mn ions in pure Au down to 3 mK indicate marked deviations from free-ion behavior in low applied fields. The effective hyperfine field that explains the anisotropy is found to decrease below 10 mK. Although this behavior could be a signature of a “bound” Kondon state with a lower effective hyperfine coupling constant, it is better explained as arising from a combination of Kondo and relaxation effects. The data indicate that the Mn local moment relaxation timeT 1 is comparable to or larger than the Larmor precession time of the Mn nuclei at 3 mK. Other possible reasons for an attenuated γ-ray anisotropy, such as nuclear quadrupole and second-order crystal field effects, are also considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00661449
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