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  • 1970-1974  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 240 (1970), S. 153-162 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The magnetic hyperfine field acting on19F nuclei in a cubic cobalt lattice at a temperature of 450 °C has been investigated. Time dependent spin rotation has been observed following the excitation and recoil implantation with a pulsed α-particle beam using the reaction19F(α,α′)19F*. The hyperfine field isH hf (450 °C)=31.4 ± 0.5 kG. The measured amplitude of the spin rotation is only 18% of the amplitude expected for the case where all19F* nuclei are assumed to be subject to the same hyperfine field without any further perturbation. This was established by means of other implantation experiments with a copper backing using first the pulsed beam technique followed by a γ-ray angular distribution measurement in coincidence with backscattered α-particles. In copper a fast perturbation was found, which reduces the anisotropy to about 80% within a short time interval immediately after the excitation.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 253 (1972), S. 257-268 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Perturbed angular correlation attenuation coefficients are given for randomly fluctuating extranuclear fields in the, what we call, “Fixed Orientation Gaussian Approximation” (FOGA). The fluctuating field is regarded as a stochastic Markov process with Gaussian probability distribution of the field strengths. The results are applicable to any correlation time.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 268 (1974), S. 145-156 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Attenuation coefficients of perturbed gamma-ray angular correlations are calculated for classical extranuclear fields which fluctuate at random both in direction and in magnitude. Explicit expressions are given for time-integral attenuation coefficients. Time-differential attenuation coefficients have been calculated numerically. The theory applies to any correlation time.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Molecular genetics and genomics 116 (1972), S. 95-98 
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A temperature-sensitive mutant of TMV with an unaltered coat protein was studied in tobacco cells isolated from leaves pre-infected at permissive temperature. At nonpermissive temperature coat protein synthesis continued at a normal rate, actinomycin D resistant RNA synthesis was stimulated, but no newly synthesized RNA was incorporated into virus or virus-like nucleoproteid particles.
    Type of Medium: Electronic Resource
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