Abstract :

In this work, the scattering properties of parahydrogen gas (p-H2) are studied in the temperature-range (1-50) K. These properties are investigated within the framework of the Lippmann-Schwinger formalism for p-H2. This formalism is used to calculate the phase shifts. The calculations are undertaken using Silvera-Goldman potential. The scattering properties of the system – the total, viscosity, and average cross sections – are then computed using these phase shifts. The s-wave scattering length for p-H2 molecules  a0 is determined as a0= 7.01 Å. The cross sections exhibited the Ramsauer–Townsend effect and resonance peaks. The lifetime  t of the quasibound states for ℓ -wave (ℓ=2,4 and 6) is also computed.