The X++2X→X2++X reaction rate constant for Ar, Kr and Xe, at 300 K

The X++2X→X2++X reaction rate constants were measured for Ar, Kr and Xe, at 300 K, using a new experimental technique. The results for Ar, kAr=(1.2±0.2)×10−31 cm6 s−1, Kr, kKr=(2.1±0.9)×10−31 cm6 s−1, and Xe, kXe=(1.48±0.18)×10−31 cm6 s−1, are discussed and compared with those of other authors using different techniques.