ISSN:
1434-601X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Energy and angular correlations between alpha particles and fission-like fragments in the reaction of35Cl+Ag at 10 MeV/n have been measured. The coincident yield is dominated by two mechanisms: sequential emission from both fragments (M α =0.137±0.014) and alpha emission from the composite system prior to scission (M α =0.124±0.012). The observation of nuclear shadowing for sequential emission from the fragments allowed us to estimate the “lifetime” of the 218 MeV excited143Gd composite system as (1–3)×10−20s. It is argued that this rather long time reflects the slow evolution in shape of the composite system and might be termed “sticking time,” since statistical-model lifetimes are typically an order of magnitude shorter. Observed also are small contributions of nonequilibrium emission in the forward direction (M α =0.005±0.001) and a component displaying the characteristics of emission from the neck (M α =0.010±0.002).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01413466
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