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  • 1990-1994  (3)
  • 1985-1989  (10)
  • 1980-1984  (12)
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  • 1
    Digitale Medien
    Digitale Medien
    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
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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)%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01419866
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  • 2
    Digitale Medien
    Digitale Medien
    NMR-ON measurement of the electric quadrupole interaction of199Au in Fe (1982)
    Springer
    The European physical journal 307 (1982), S. 159-161 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The magnetic-dipole and electric-quadrupole interaction frequencies of199AuJ π=3/2+ T 1/2=3.1 d) in Fe were measured with nuclear magnetic resonance on oriented nuclei as 166.69(4) MHz and −1.52(2) MHz, respectively. This quadrupole splitting is in disagreement to the value previously reported.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01414830
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  • 3
    Digitale Medien
    Digitale Medien
    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
    Schlagwort(e): 21.10.Ky ; 29.75.+x ; 76.80.+y
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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].
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294670
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  • 4
    Digitale Medien
    Digitale Medien
    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
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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).
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01412947
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  • 5
    Digitale Medien
    Digitale Medien
    Nuclear magnetic resonance on oriented192Ir in Fe and Ni (1980)
    Springer
    The European physical journal 295 (1980), S. 385-400 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01412952
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  • 6
    Digitale Medien
    Digitale Medien
    Magnetic moment and electric quadrupole moment of the anomalous186Ir ground state (1980)
    Springer
    The European physical journal 297 (1980), S. 329-332 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The ground state nuclear moments of186Ir (j π=5(+)) have been determined with NMR on oriented186Ir in Ni as |μ|=3.80 −0.02 +0.12 μ n andQ=−3.00 (15)b. The quadrupole moment is consistent with an anamolousj π K=5+0 or 5+1 ground state configuration. The explanation of the magnetic moment in terms of pure 5+0 or 5+1 configurations would require a high collectiveg R-factor ofg R≧0.76. On the other hand the magnetic moment can be explained with a “normal”g R and a mixed ground state configuration.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01422793
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  • 7
    Digitale Medien
    Digitale Medien
    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
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: 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.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01413411
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  • 8
    Digitale Medien
    Digitale Medien
    Comment on ‘The low temperature electric quadrupole orientation of184Ir and185Ir in rhenium’ (1983)
    Springer
    Hyperfine interactions 14 (1983), S. 97-98 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract It is shown that the assignment of a 7−/2[503] neutron configuration to the ground state of184Ir by Allsop et al. [1] is inconsistent with the measured quadrupole moment of this state.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02143934
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  • 9
    Digitale Medien
    Digitale Medien
    Low-temperature nuclear orientation of173Lu,175Hf,178Ta and182m,183,184,186Re in Re (1983)
    Springer
    Hyperfine interactions 15 (1983), S. 105-108 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Quadrupole-interaction nuclear-orientation experiments were performed on dilute samples of the Group IIIb and IVb impurities173Lu and175Hf in a (Group VIIb) Re single crystal, the samples being preparedin situ by irradiation of a Re single crystal with 172.5 MeV alpha particles. From the γ-anisotropies at temperatures down to 8mk the quadrupole interaction frequencies ΝQ=e2qQ/h of173LuRe and175HfRe were determined to be −1149 (100) and −540 (43) MHz, respectively. The negative sign in both cases indicates that the direction of the electric field gradient (EFG) at the impurity sites is fixed uniquely by the properties of the host lattice. The absolute magnitudes of these EFG's differ strongly from that of the pure system ReRe; the electronic contribution to the EFG of different impurities in Re decreases with increasing impurity valence, contrary to the expectation. As a byproduct, the quadrupole splittings of178Ta,182m, 183, 184, 186Re in Re were measured to be −103(10), −502(30), −281(20), −340(22) and −73(7) MHz.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02159727
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  • 10
    Digitale Medien
    Digitale Medien
    NMR-ON on196,197m,198,198m,200mAu in Fe and Ni (1983)
    Springer
    Hyperfine interactions 15 (1983), S. 93-96 
    Details
    ISSN: 1572-9540
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The zero-field hyperfine splitting frequencies of a series of Au isotopes in Fe and Ni have been determined with nuclear magnetic resonance on oriented nuclei. The results are: . For198Au(2−) in Fe the quadrupole splitting could be resolved. The results are ¦gΜNBHF/h|=259.48 (3) MHz and e2qp/h=−2.08(4) MHz. Our measurements show that most hyperfine splittings published on these isotopes have been incorrect. The quadrupole splitting of198AuFe disagrees in magnitudeand sign from the value reported by single-passage NMR on oriented nuclei. The following nuclear quantities are deduced: Μ(197mAu,11/2−)=5.98(9) ΜN; Μ(198mAu, 12−)=5.85(9) ΜN; Μ(200mAu, 12−)=5.90(9) ΜN; Q(198Au,2−)/Q(199Au, 3/2+)=1.37(3). Our measurements show further that the non-contact hyperfine field for Au in Ni is smaller than assumed previously, and that the magnetic hyperfine splitting frequency of197AuFe known from NMR is inconsistent with the magnetic hyperfine splitting frequencies of198, 199AuFe.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02159724
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