Pressure broadening and shift of D1 line of Ag by He, Ar and N2

TL;DR

This study experimentally measures the pressure broadening and shift of the silver D1 spectral line caused by helium, argon, and nitrogen gases at high temperature and pressure, providing specific quantitative data.

Contribution

It provides new experimental data on pressure broadening and shifts of Ag D1 line by different buffer gases at elevated temperature and pressure.

Findings

Pressure broadening values are around 5.2-5.8 MHz/Torr.

Shifts are positive for He (+1.16 MHz/Torr) and negative for Ar and N2.

Data obtained at ~1000 K and up to 1000 Torr.

Abstract

We have studied experimentally pressure broadening and shift of Ag D1 line caused by He, Ar and N2 buffer gases. The measurements were done in a heat-pipe type absorption cell at a temperature of ~1000 K and gas pressures up to 1000 torr. The measured values for pressure broadening and shift (in MHz/Torr) are as follows: Ag-He 5.8(1), +1.16(2); Ag-Ar 5.2(2), -2.28(4); Ag-N2 5.2(1), -2.52(7). The "+" and "-" signs indicate the direction for the shifts to the blue and red side of the spectrum, respectively.