Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 67: Poster Session

HK 67.21: Poster

Thursday, March 19, 2009, 14:00–16:00, Audi-Max

On the stability of fragments formed in heavy ion collision using microscopic binding algorithm — •supriya goyal and rajeev k. puri — physics department, panjab university, chandigarh-1600 14, india

The multi fragmentation phenomenon in heavy ion collisions has attracted a lot of attention in recent years. The last gem has also been linked with the liquid gas phase transition. This may also be used to pin down the nuclear equation of state. The phase space obtained with event generators has to be clusterized and often one also needs after burners to de-excite the fragments. One of the most popular clusterization algorithm is based on the spatial distance between nucleons. The serious problem with such simple algorithm is that we donot have control over the stability of the fragments, thus created. We here extend this algorithm to include the microscopic binding energy for each fragments using modified mass formula. We check the binding energy of each such fragment whether it is neutron rich/deficient at microscopic level and all fragments who fail to fulfill the check are treated as free nucleons. Our preliminary results show that 1. This new algorithm (named as Minimum Spanning Tree- Micro bound) enables us to filter all unstable fragments. 2. For the central reactions of Au-Au, the results are closer to experimental data indicating the need of microscopic binding energy for fragmentation.