AN ERROR ANALYSIS OF THE RAPID LIFETIME DETERMINATION METHOD FOR THE EVALUATION OF SINGLE EXPONENTIAL DECAYS
AN ERROR ANALYSIS OF THE RAPID LIFETIME DETERMINATION METHOD FOR THE EVALUATION OF SINGLE EXPONENTIAL DECAYS
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DOI：
10.1021/ac00176a007
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发表时间：
1989-01-01
影响因子：
7.4
通讯作者：
DEMAS, JN
中科院分区：
文献类型：
--
作者：
BALLEW, RM;DEMAS, JN
评价了单指数衰减的Ashworth快速寿命测定方法（RLD）的精度和速度。将RLD与加权线性最小二乘（WLLS）方法进行了比较。结果显示为积分范围和信号噪声电平的函数。对于寿命和指前因子，均存在最优拟合区域，但在最优拟合区域两侧误差增长缓慢。测定指前因子和寿命的最佳条件是相似的，因此即使在低总计数时也能以良好的精度测定两者（104）。在最优区域，RLD的相对标准偏差仅比WLLS差30-40%，但计算速度要快数十到数百倍，这取决于数据的获取方式。RLD的速度和精度加上数据采集的便利性使其成为实时分析的有吸引力的数据简化工具。
The precision and speed of Ashworth’s rapid lifetime determination method (RLD) for a single exponential decay Is evaluated. The RLD Is compared to the weighted linear least-squares (WLLS) method. Results are presented as a function of Integration range and signal noise level. For both the lifetime and the preexponential factor, optimum fitting regions exist, yet the errors Increase rather slowly on either side of the optimum. The optimum conditions for determination of the preexponential factor and the lifetime are similar, so both can be determined with good precision even at low total counts (104). In the optimum region, the relative standard deviations for the RLD are only 30-40% worse than for WLLS, but the calculations are tens to hundreds of times faster, depending on how the data are taken. The speed and precision of the RLD coupled with the ease ofdata acquisition make It an attractive data reduction tool for real time analy-ses.