⁴He fragments from the ¹⁴N + ¹²C collision at 35 MeV/nucleon and clustering in colliding nuclei

In order to study effects of clustering of colliding nuclei in the fragmentation process, the fragmentation of the ¹⁴N+ ¹²C reaction at 35 MeV/nucleon is analyzed by antisymmetrized molecular dynamics. It is found that ⁴He fragments from ¹²C fragmentation are much more abundant than those from ¹⁴N fragmentation. Characters of ⁴He fragments from ¹²C fragmentation are investigated and it is found that this abundance in ¹²C fragmentation results from the three-alpha breakup in a short time scale where the excited states with excitation energy 7-15 MeV play an important role.