K. Takizawa et al., Decay kinetics of N((2)p or D-2)+N-2(X-1 Sigma(+)(g),upsilon '') in low temperature solid nitrogen, J PHYS CH A, 104(16), 2000, pp. 3693-3697
Under the irradiation of free-standing nitrogen crystal at low temperature
with focused KrF excimer laser light, the system of N(P-2 or D-2) + N-2(X(1
)Sigma(8)(+), upsilon ") has been prepared through the energy transfer betw
een N(S-4) and N-2(A(3)Sigma(u)(+)). The decay processes have been monitore
d by observing alpha " emission which corresponds to the transition N(D-2)
+ N-2(X, upsilon ") --> N(S-4) + N-2(X, upsilon " - 1) and delta " emission
which corresponds to the transition N(P-2) + N-2(X, upsilon ") --> N(D-2)
+ N-2(X, upsilon " - 1). The observed lifetimes for the alpha " emissions f
or individual upsilon " are on the order of several seconds, and those for
the delta " emissions, on the order of several milliseconds. It is conclude
d that the alpha " transitions are affected by the multiphonon assisted V-V
(vibration to vibration) relaxation, and the delta " transitions are mostl
y radiatively controlled.