PERGOLAKAN PETANI DAN PERUBAHAN SOSIAL

vi; 125 hlm;14 x 21 c

Peculiarities in fragment mass distribution in the 238U\bf{^{238}U} + 40Ar\bf{^{40}Ar} (243 MeV) reaction

A pronounced fine structure (FS) in the form of distinct peaks was observed in neutron gated mass spectra from the decay of the $^{278}$110 composite system produced in the reaction $\mathsf{^{238}U}$ + $\mathsf{^{40}Ar}$ (243 MeV) at an initial excitation energy $E^*> 70$ MeV. The FS peaks are located in the vicinity of mass numbers 70-80, 100, and 130, which correspond to those of magic nuclei (clusters). In the data there is also evidence for a new type of decay -collinear cluster tripartition of an excited nucleus