论文部分内容阅读
对25MeV／u40Ar＋209Bi非完全熔合反应中形成的热核，测量了与裂变碎片相符合的α粒子能谱，用运动源模型分解α粒子能谱得到了裂变断前和断后发射α粒子多重性．由断后碎片发射α粒子多重性得到断点激发能约为172．5MeV．由断前α粒子多重性得到激发能在470—600MeV范围内的热核的裂变时标约为4×10－21S．
The energy spectra of α particles coinciding with the fission fragments were measured for the thermonuclei formed in the incompletely fused reaction of 25MeV / u40Ar + 209Bi. The α particle multiplicity of fission anomalies was detected by decomposing α - particles energy spectrum with motion source model. The break off point excitation energy is about 172.5 MeV due to the multiplicity of α particles emitted by the broken fragments. The fission time scale of the thermal core in the range of 470-600 MeV with excitation energy obtained from the multiplicity of pre-anomalous α particles is about 4 × 10-21S.