摘要
The first three-fold and four-fold fragmentation measurements in hot compound nuclei pro-duced in the reactions of a 25 MeV/u <sup>40</sup>At beam with targets of <sup>209</sup>Bi,<sup>197</sup>Au,<sup>159</sup>Tb,<sup>115</sup>In,<sup>103</sup>Rh,and<sup>93</sup>Nb are presented.Various distributions are measured for these fragments,including distributions of ve-locities,relative velocities,angles,relative angles,masses,fragment mass ratios,total kinetic energies（TKE）,as well as the yield ratios of three-fold fragmentation to fission P<sub>32</sub> and the time difference △t be-tween two scissions after the formation of one compound nucleus.
The first three-fold and four-fold fragmentation measurements in hot compound nuclei pro- duced in the reactions of a 25 MeV/u <sup>40</sup>At beam with targets of <sup>209</sup>Bi,<sup>197</sup>Au,<sup>159</sup>Tb,<sup>115</sup>In,<sup>103</sup>Rh,and <sup>93</sup>Nb are presented.Various distributions are measured for these fragments,including distributions of ve- locities,relative velocities,angles,relative angles,masses,fragment mass ratios,total kinetic energies （TKE）,as well as the yield ratios of three-fold fragmentation to fission P<sub>32</sub> and the time difference △t be- tween two scissions after the formation of one compound nucleus.
基金
The project partially supported by the National Natural Science Foundation of China
