Zeitschrift für Physik A Atoms and Nuclei

, Volume 276, Issue 3, pp 295–302 | Cite as

Deformed states of high spin in42Ca

  • P. Betz
  • E. Bitterwolf
  • B. Busshardt
  • H. Röpke


The42Ca levels at 4,715 and 6,633 keV excitation energy have been investigated using the39K(α,pγ reaction atEα=14 and 15 MeV. From particle-γ-ray angular correlations the spin assignmentsJ(4,715)=6, 4 andJ(6,633)=8, 6, 4 have been obtained. Lifetime measurements using the Doppler-shift attenuation method yieldedτ (4,715)=120±46 fs andτ(6,633)=52±21 fs. Both levels have positive parity and decay by enhancedE2 transitions. They are interpreted as theJπ=6+ and 8+ members, respectively, of theKπ=0+ rotational band which has theE x =1,837, 2,423 and 3,250 keV states as further members. The enhancement of inbandE2 transitions is 50 −16 +35 W.u. (6→4) and 63 W.u. (8→6) respectively. The intrinsic quadrupole moments which have been derived on the basis of the coexistence model, areQ0=1.13−0.16/+0.37b(8→6) andQ0=1.36±0.25b(6→4), respectively. TheJπ=10+ member of the rotational band has possibly been observed as a level at 8,856±5 keV excitation energy.


Attenuation Elementary Particle High Spin Quadrupole Moment Positive Parity 
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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • P. Betz
    • 1
  • E. Bitterwolf
    • 1
  • B. Busshardt
    • 1
  • H. Röpke
    • 1
  1. 1.Fakultat für Physik der Universität FreiburgFreiburg/Brsg.W.-Germany

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