Objective

To develop a computational scheme in order to describe the de-excitation of a compound nucleus with evaporation and sequential binary decay.  

Code description 

MECO (Multisequential Evaporation COde) is a Monte Carlo computer code designed to simulate the compound nucleus decay. The code treats asymmetric mass splittings involving nucleon emission together with symmetric binary ones according to a generalized Weisskopf evaporation formalism. Emitted fragments in their ground, excited-bound and unbound states are considered.

The Monte Carlo method allows a simulation of the experimental conditions. Events that contain information on the emitted particles and secondary decay products can be obtained to compare with the observables. [Nicolis2008, Nicolis2023]

Applications

MECO is currently working in conjunction with Intranuclear cascade codes for the description of spallation reactions, See e.g. [Assimakopoulou2019] 

Some References

• Sequential binary decay of highly excited nuclei, N.G. Nicolis, Int. J. Mod. Phys. E17, 1541 (2008).
• The equilibrium decay stage in proton-induced spallation reactions, Nikolaos G. Nicolis in Multifragmentation in Heavy‐Ion Reactions: Theory and Experiments, Chapter 16, Edited by Rajeev K. Puri, Yu‐Gang Ma, and Arun Sharma, Copyright © 2023 Jenny Stanford Publishing Pte.Ltd.  
• Microscopic description of proton-induced spallation reactions with the Constrained Molecular Dynamics (CoMD) Model, A. Assimakopoulou, G.A. Souliotis, A. Bonasera, A. Botvina, N.G. Nicolis and M. Veselsky, J. Phys. G: Nucl. Part. Phys. 46 075104 (2019).