Spectra data for manuscript "Very low-yield nuclear test verification with post-experiment gamma spectrometry".

This file contains the data that is used to produce results and plots in this research. They contain arrays of numbers that represent gamma spectra computed with simulations of subcritical and supercritical tests and collected by a simulated HPGe gamma spectrometer placed outside of the test vessel, one month to one year after a test. These arrays are divided into two files: spectra obtained where the pre-test configuration is a thin shell (spectra_data_shell.txt) and those obtained for a solid sphere (spectra_data_sphere.txt). Within each file, each spectral data set is headed by input parameters (test parameters): alpha (the criticality level of the test), no (the initial number of fissions per kg of plutonium-239), and the time between the test and the measurement. The numbers in these arrays represent the counts of gamma photons detected in energy bins of 1 keV from 0 to 3000 keV.本文件包含了本研究中用于生成结果与图表的全部数据。这些数据为数值数组，代表通过次临界与超临界试验模拟计算得到的γ能谱，由放置于试验容器外部的模拟高纯锗（HPGe）γ射线能谱仪在试验结束后1个月至1年的时间段内采集所得。该数据集分为两个文件：分别对应预试验配置为薄壳结构的能谱数据（spectra_data_shell.txt），以及对应实心球体结构的能谱数据（spectra_data_sphere.txt）。在每个文件中，每一组能谱数据的开头均附带输入参数（试验参数）：α（试验的临界度水平）、n₀（每千克钚-239的初始裂变数），以及试验与测量之间的时间间隔。数组内的数值代表在0至3000 keV的能量区间内，以1 keV为分箱宽度所探测到的γ光子计数。