Abstract
The mean life of the second excited state in 42Ca (1.84 MeV, O +) was measured by a direct electronic timing technique to be 558 ± 8 ps. This result compares with a previous measurement of 480 ± 30 ps which yields a high B(E2) value. The present result gives a B(E2; 0 2 + 1.84 MeV → 2 1 + 1.52 MeV) value of 484 e 2 · fm 4 or 55 single-particle units; the theoretical implications of this are discussed. The accurate mean life was extracted using a convoluted function to describe both the inherent time resolution of the experimental system and the exponential decay of the state of interest.
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