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  • 1975-1979  (3)
Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 292 (1979), S. 73-77 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The beta strength functionS β is calculated in a schematical Brown-Bolsterli model for the Gamow-Tellerβ − decay of89–99Rb. The position of the peaks inS β resulting from the back spin flip transitions and the calculated life-times are in good agreement with recent experimental results. A simple regularity is found to govern the energy position of the lowest-lying structures inS β. By calculations of the type given here thus it should be possible to produce much more reliable input data concerningS β forr-orn-process calculations than have been used up to now in astrophysical calculations.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 292 (1979), S. 249-255 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Beta delayed fission (βDF) gives a possibility to investigate the fission barrier for nuclei far off beta stability. However, before any information on the fission barrier can be extracted, the effect of low-lying structures in the beta-strength function (S β) on theβDF branching ratio has to be considered. This is in general not done. In this paper the lowlying structures that occur inS β are discussed and microscopic calculations for the Gamow-Teller strength function are presented for232Th (β −-decay) and232Pu,240Cm,244,248Cf and248Fm (β +-decay). Using the calculated strength functionsβ +DF branching ratios are calculated and compared with the experimental ones. The sensitivity of the results to different shapes ofS β is investigated. It is concluded that, when the expected structures inS β are considered, there are at present no indications fromβ + DF measurements that the errors in the fission barrier calculations are larger than the uncertainty given for those calculations. The difference in magnitude between theβ − DF and theβ +DF branching ratios is also explained by the occurrence of low-lying structures inS β.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 289 (1979), S. 193-196 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new method of identifying high-spin states at high excitation energies is presented.
    Type of Medium: Electronic Resource
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