作者: P G Coleman
DOI: 10.1088/0022-3700/14/14/021
关键词: Rotational transition 、 Physics 、 Momentum transfer 、 Positron 、 Homonuclear molecule 、 Spectral line 、 Atomic physics 、 Annihilation 、 Excitation 、 Thermalisation
摘要: Values of the energy-dependent cross sections for momentum transfer, annihilation and rotational excitation deexcitation positrons in N2, H2 D2 are chosen so that, when used a simple slowing-down calculation, forms recently measured lifetime spectra best reproduced. The success this procedure suggests essentially whole time taken thermalisation these gases, undergo collisions involving only or transfer. A reliable estimation two processes with energies below 0.5 eV homonuclear diatomic molecules should follow from application fuller theoretical analysis wider range experimental data.