Anomalously Long Lifetime of 21^ + State of 16C
Abstract
A new experimental method has been developed to measure the mean-life of the first excited state of 16C. The method uses a concept of the shadow technique with high velocity (β ≃ 0.3) of the excited nucleus. The mean-life was determined to be τ = 77 ± 14 (stat) ±19 (syst) ps. The central value of mean-life corresponds to B( {{E}2;21^ + -> 0{g{.s}{.}}^ + } ; ) = 0.63 e2 {fm}4 , or 0.26 Weisskopf units. This transition strength was found to be anomalously small compared to the empirically predicted value.
- Publication:
-
A New Era of Nuclear Structure Physics
- Pub Date:
- October 2004
- DOI:
- 10.1142/9789812702401_0032
- Bibcode:
- 2004nens.conf..215I