4 research outputs found
Three-dimensional modelling of arc behaviour and gas shield quality in tandem gas–metal arc welding using anti-phase pulse synchronization
Calculation of radiative transition probabilities and radiative recombination rate coefficients for H
A method is presented to calculate the radiative
transition probabilities and the radiative recombination rate coefficients
between electronic molecular states. Total transition probabilities are
determined from vibrational transition probabilities without considering the
detailed rotational structure of the molecular electronic states. Radiative
recombination rate coefficients are obtained from the computation of
vibrational photo-ionisation cross sections. Concerning spontaneous
emission, Lyman (B → X) and Werner (C → X) band systems of H2
and Meinel (A → X), (B → A) and (B → X) band systems of OH
are investigated. For radiative recombination, transitions between
H2+(X) and H2(X), and between OH+(X, a, A, b, and c) and
OH(X) are considered. Transition probabilities and recombination rate
coefficients are calculated as a function of temperature in the range 1500–15 000 K