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  • 1985-1989  (4)
  • 1986  (4)
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Erscheinungszeitraum
  • 1985-1989  (4)
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  • 1
    Digitale Medien
    Digitale Medien
    The triple-alpha-reaction at low temperatures (1986)
    Springer
    The European physical journal 324 (1986), S. 147-152 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 97.10 ; 97.60
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have studied the triple-α-reaction at low temperatures which is of importance on accreting white dwarfs and neutron stars. Although we have improved a recent investigation of Nomoto, Thielemann and Miyaji on several points, we find a reaction rate for the relevant temperature range (T=107−108K) which is rather similar to the previous result. In particular, our improved study confirms that helium might be ignited on accreting white dwarfs at temperaturesT≦4.107 K.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01325126
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Resonant and intrastate transitions to the 2+ state in8Be (1986)
    Springer
    The European physical journal 324 (1986), S. 307-310 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 23.20 ; 27.10 ; 21.60G
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have studied resonant, intrastate and non-resonant bremsstrahlungγ-ray transitions leading to the 2+ state in8Be atE x=2.94 MeV. We find aγ-width of Γ γ =0.45 eV for the 4+ state in8Be, corresponding to anE 2 strength of 19 W.u. For the intrastateγ-ray transition within the 2+ resonance we predict a maximum cross section of 2.5 nb atE≈3.3 MeV. An experimental observation of this novel type ofγ-ray emission, however, appears to be difficult due to the dominance of competing resonant and direct capture processes.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294584
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    The proton capture reactions on21Na and22Na under hydrogen burning conditions (1986)
    Springer
    The European physical journal 325 (1986), S. 309-315 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 25.40 ; 97.10
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have updated and recalculated the21Na(p, γ)22Mg and22Na(p, γ)23Mg reaction rates for temperatures 107–109 K relevant for explosive hydrogen burning in stellar environment. We find the21Na(p, γ)22Mg rate lower than recently suggested. Considering various uncertainties in spin and parity assignments of the low energy22Na+p resonances we present upper and lower limits for the22Na(p, γ)23Mg reaction rate which, however, allows for a meaningful discussion of the consequences of the new rates on the Ne - Na cycle under various stellar conditions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01294614
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Influence of theD and6Li quadrupole moments on theD(α,γ)6Li stellar reaction rate (1986)
    Springer
    The European physical journal 325 (1986), S. 193-196 
    Details
    ISSN: 1434-601X
    Schlagwort(e): 23.20 ; 27.10
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We have studied theD(α, γ)6Li reaction at stellar energies within a potential model. Our calculation improves previous investigations as we explicitely take into account the internal quadrupole moment of the deuteron and ad-state component in the6Li ground state. We reproduce the experimental data for energiesE〈3 MeV. We find, however, that our improvements represent only minor corrections.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01289650
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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