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HK: Physik der Hadronen und Kerne

HK 16: Kernphysik/Spektroskopie II

HK 16.12: Talk

Tuesday, March 18, 2003, 18:45–19:00, A

Emission of Unbound ⁸Be- and ¹²C-Clusters in Compound Reactions — •Tz. Kokalova^1,2 and S. Torilov^1,2 — ¹Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, D-14109 Berlin, Germany — ²Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, D-14195 Berlin, Germany

We have studied the emission of light unbound clusters, ⁸Be and ¹²C_0⁺^*, in the reactions ¹⁸O+¹³C→²³Ne+⁸Be and ²⁸Si+²⁴Mg→⁵²Fe→ ⁴⁰Ca+¹²C_0⁺^*. In the residual nuclei (Ne and Ca) we have observed positive and negative parity bands, the population of these bands with ⁸Be and ¹²C₀₊^* emission is studied relative to the statistical emission of two or three α-particles. The angular momentum-energy balance of the cluster emission is compared with that of multiple α-emission. The properties of the energy spectra of α-particles and clusters and the population of deformed shapes by cluster emission are discussed.