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Dynamics of excimer formation and decay in supercritical krypton
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Image of FIG. 1.
FIG. 1.

Absorption spectra for Kr at 109 bar at various times after the pulse: 1 ns, ◆ ——; 5 ns - - - - -, ▲; and 9 ns ●——-.

Image of FIG. 2.
FIG. 2.

(a) Pulse-probe experiment at 114 bar and 920 nm. Smooth line is fit to the data. (b) Simulated trace of excimer species at 114 bar.

Image of FIG. 3.
FIG. 3.

Rate of formation of excimer B vs [Kr].

Image of FIG. 4.
FIG. 4.

Rates of decay of B and growth of C vs Kr concentration.

Image of FIG. 5.
FIG. 5.

Spectrum at 54 bar and 30 ns. Species C dominates, absorbing at 1065 nm.

Image of FIG. 6.
FIG. 6.

Spectra of excimer transients at 15 bar. Solid circles at ; solid line is spline fit at that time. Open circles at ; dashed line is spline fit at that time.

Image of FIG. 7.
FIG. 7.

Absorption trace of species A at 1300 nm and 109 bar. Fit shows two lifetimes 1.0 and 7.0 ns.

Image of FIG. 8.
FIG. 8.

(a) 54 bar—species A absorbing at 790 nm. Lifetimes 1 and 23 ns. (b) Calculated concentration of excimer state vs time at 54 bar.

Image of FIG. 9.
FIG. 9.

Calculated excimer concentration versus time at 54 bar. Solid line is , Dash-dash is , Dash-dot-dash is the fluorescent triplet and Dash-dot-dot-dash is the fluorescent singlet . The other species are all close to baseline.


Generic image for table
Table I.

Species lifetimes and time of peak maximum (nanosecond).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dynamics of excimer formation and decay in supercritical krypton