Radioactivity measurement of 85Kr with position-sensitive proportional counter

Primary radioactive gas standards (excluding radon)

“…Some investigators have used glass beads on the anode wire, or guard tubes and field tubes to prevent field distortion along the counters [2][3][4]. Position-sensitive proportional counters have also been used [5][6][7]. A unique and elegant solution has been to construct a single counter having a variable length.…”