Transition lines of neutral arsenic atom (As I) have been observed in the spectra of stellar and sub-stellar objects. Accurate and reliable data of oscillator strengths of those transitions allow differentiating between different evolution models of those objects. We have measured branching fractions for As I (4p²5s-4p³) transition lines in 180–310 nm spectral range with higher increased accuracy using light source powered by inductively coupled radio frequency plasma (RF-ICP) source – not earlier applied in studies of atomic arsenic. The measurements were performed for 7 excited states of As I and compared with data from the literature. We combined them with the selected lifetime values reported in the literature. The transition probabilities for 26 spectral lines are obtained and compared with other experimental and theoretical data from literature. The absorption oscillator strengths for two As I (4p²5s-4p³) resonance transitions (197.3 nm, f = 0.127, and 193.8 nm f = 0.059) are also reported.

在恒星和亚恒星天体的光谱中已经观察到中性砷原子（As I）的跃迁线。这些转变的振荡器强度的准确和可靠的数据允许区分这些对象的不同演化模型。我们已经测量了 As I (4p ² 5s-4p ³) 过渡线在 180-310 nm 光谱范围内，使用由电感耦合射频等离子体 (RF-ICP) 源供电的光源具有更高的精度 - 早期未应用于原子砷的研究。对 As I 的 7 个激发态进行了测量，并与文献中的数据进行了比较。我们将它们与文献中报告的选定生命周期值相结合。获得了 26 条谱线的跃迁概率，并与文献中的其他实验和理论数据进行了比较。还报告了两个 As I (4p ² 5s-4p ³ ) 共振跃迁（197.3 nm、f  = 0.127 和 193.8 nm f  = 0.059）的吸收振荡器强度。