FITEVT: A FORTRAN program for arrival-time analysis of nuclear-decay events

FITEVT is a FORTRAN program designed to analyze recorded arrival times of nuclear-decay events affected by dead-time. The primary goal of the program is precise and accurate determination of half-lives. Its method involves imposition of a known sufficiently long extending dead-time to the recorded event sequence, so that the original dead-time effects are completely obliterated and the remaining live-times of the survived events are known exactly. Upon completion of the analysis, the arrival-time spectrum and the live-time spectrum are predicted and compared to those constructed from the survived events.FITEVT是一款专为分析受死时间（dead-time）影响的核衰变事件记录到达时间而开发的FORTRAN程序。该程序的核心目标是精准且可靠地测定半衰期（half-lives）。其具体方法为：向已记录的事件序列施加一段已知的足够长的扩展死时间，以此完全消除原始死时间带来的效应，且幸存事件的剩余存活时间（live-time）可被精确获知。分析完成后，将对到达时间谱（arrival-time spectrum）与存活时间谱（live-time spectrum）进行预测，并将其与从幸存事件中构建的对应谱线进行比对。