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  • Articles: DFG German National Licenses  (7)
  • 1970-1974  (2)
  • 1965-1969  (5)
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  • Articles: DFG German National Licenses  (7)
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  • 1
    Electronic Resource
    Electronic Resource
    Optical pumping of short lived Β-radioactive isotopes and the magnetic moment of37K (1969)
    Springer
    The European physical journal 226 (1969), S. 297-327 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 21Na (T 1/2=23 sec) and37K(T 1/2=1.25 sec) have been produced in gas targets by (d, n) reactions and polarized by means of optical pumping or spin exchange scattering with optically pumped87Rb. An asymmetry up to 3% in theΒ-decay of the polarized nuclei was found, which served to detect rf transitions between hfs levels of the atomic ground states of21Na and37K.δF=0 andδF=1 resonances have been recorded, yielding spin, hfs separation and magnetic moment, especiallyI(37K)=3/2,δW(37K)=240.266 (3) Mc/sec andΜ I(37K)=0.02033(6) nm (diamagnetically corrected). For21Na earlier rf-spectroscopic data have been confirmed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01399103
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Spin exchange polarization and hfs anomaly measurement of β-active37K (1971)
    Springer
    The European physical journal 244 (1971), S. 44-69 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Rf-spectroscopic measurements in the atomic ground state of the 1.2 sec-isotope37K yielded independent values of magnetic moment μ I (37K)=0.20320 (6) nm (diamagnetically corrected), hfs separation ΔW(37K)=240.2672 (7) MHz and the resulting hfs anomaly37Δ39=(0.249±0.035) · 10−2. The37K was polarized by spin exchange scattering with optically pumped87Rb; as a detector for rf transitions the asymmetry of the β-decay of the polarized37K nuclei was used. A detailed analysis of the spin exchange mechanism under the conditions of experiments of this type was performed. This led to an explanation for the observed strong enhancement of the resonance signal heights by the spin bath. Furthermore the dependence of the nuclear polarization and relaxation time constants on the strength of the hfs coupling could be demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01394873
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Präzisionsmessung der Kerndipolmomente von Ba135 und Ba137 mit optischem Pumpen (1966)
    Springer
    The European physical journal 196 (1966), S. 77-84 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nuclear Zeeman levels of the ground state of Barium (6s2 1S0, F=I=3/2) were polarized by means of optical pumping with the resonance line (6s2 1S0−6s 6p1P1, λ=5535 Å). The magnetic field was calibrated by means of optical pumping of sodium. The magnetic moments, calculated from the nuclear Hf-Zeeman-transitions at 228 Gauss are μ135=0,83651 (6) μN μ137=0,93573 (6) μN (with diamagnetic correction). With the results of nuclear induction in BaCl2 we calculate the chemical shift to be (8.6±1.0)·10−4. The ratio of the nuclear moments is μ137/μ135=1.11862 (3) in agreement with the measurements in BaCl2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01330911
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Bestimmung der Kerndipolmomente von171Yb und173Yb durch optisches Pumpen (1967)
    Springer
    The European physical journal 200 (1967), S. 224-226 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nuclear Zeeman levels of the odd isotopes of Ytterbium (171Yb,171 I=1/2;173Yb,173 I=5/2) were polarized in the atomic ground state (6s 2 1 S 0) by means of optical pumping with the resonance line (6s 2 1 S 0 ↔ 6s6p 1 P 1,λ=3988 å). The magnetic moments, calculated from the nuclear Hf-Zeeman transitions in a magnetic field of 228 Gauss are171 Μ I=0.49188 (2)Μ K 173 Μ I=0,67755 (3)Μ K (with diamagnetic correction applied).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01328937
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Kopplung μ-mesonischer und elektronischer Hyperfeinstruktur in einem Atom (1969)
    Springer
    The European physical journal 225 (1969), S. 393-406 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In calculating the hyperfinestructure interaction between aμ-mesonic atom and a valence electron, the former can be treated as a pseudonucleus of charge (Z−1), since its radius is very small as compared to the one of the electronic wave function. The consequences of this concept as well as corrections to it are discussed in detail. The experimental possibility of anrf-spectroscopy of this hyperfinestructure is pointed out. It bases on the destruction of theβ-decay asymmetry of stopped polarizedμ-mesons at resonance. Special attention is payed to the one-electron system (He++ μ−)e −.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01392768
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    A Rb-magnetometer for a wide range and high sensitivity (1974)
    Springer
    Applied physics 3 (1974), S. 367-378 
    Details
    ISSN: 1432-0630
    Keywords: Magnetometer ; Optical resonance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A Rb-magnetometer was constructed for a wide range of application. It uses a very small optically pumped resonance cell with an active volume of less than 0.1 cm3 as the sensor element. The cell is housed in a small probe containing polarizer, rf-coil, heater and photoelement. The pumping light is brought to the resonance cell by use of a 3 m long fibre optics. The magnetometer allows continuous monitoring or stabilizing magnetic fields from about 3·10−8T to beyond 0.3T. The ultimate sensitivity of the instrument is of the order of 10−10T. Observing the Hanle signal in the transverse mode of optical pumping the instrument can be used for zero field detection and for the measurement for weak fields by means of field compensation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885841
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Neubestimmung der absoluten Oszillatorenstärke der Eisen I-Resonanzlinieλ=3720 Å durch optische Doppelresonanz (1969)
    Springer
    The European physical journal 220 (1969), S. 349-361 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The natural width of the strong Fe I spectral lineλ=3719,9 Å was determined in a double resonance experiment with an atomic beam as resonance cell and a hollow cathode as light source by the observation ofrf-induced magnetic dipole transitions between the Zeeman sublevels of the excited state in a weak static magnetic fieldH 0. The optical line was isolated from disturbing neighbours in the same multiplet either roughly by an interference filter or strictly by a monochromator. From the widthΔν=5,35(14) MHz of the double resonance signal (monochromator value, including a small correction of 1.5% for the hyperfine structure of the 2.2% natural abundance of iron-57) the lifetimeτ of the (z 5 F 5 0 )-level is found to beτ=5,95 (16)×10−8 sec. Thef-value of the transition to the ground state (a 5 D 4) is calculated, by using the known relativef-values for the weak alternative transition possibilities to the (a 4 F 5) and (a 5 F 4) levels (λ=5012 and 5127 Å), to bef λ3720=4,21 (11)×10−2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01395620
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    Paper (German National Licenses)
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