Horiba Scientific Quanta-phi F-3029, Руководство по эксплуатации

Страница: 47 / 98

Quanta-
φ
rev. C (23 Apr 2010) Installation & Use
3-13
Note:
When using a photomultiplier tube, keep the sig-
nal-level within the linear range (<1.5 × 10
6
counts/s).
For CCDs, keep the counts to ~ 45 000 per accumula-
tion.
Click the
OK
button if this message appears.
When the scan is finished, the
Project Name
window appears.
n
Give the project a name, and click the OK button.
The data appear in graphical format:
8
Maximize the Rayleigh peak without saturating
it.
a
Double-click in the graph to open it.
b
The same graph appears in a new window.
c
Zoom with the
Scale In
button and select the luminescence to see
its strength.
d
Rescale and examine the Rayleigh peak:
In this case, the Rayleigh excitation peak is not saturated, so it is accept-
able. But the luminescence was low (only 7000 counts), so you may:

Widen the
Slit
values (bandpass)

Decrease attenuation from neutral-density filter

Increase the
Integration Time

Increase the number of
Accumulations
After adjusting our experimental parameters to 1.5 nm excitation band-
pass and 2 nm emission bandpass, we attain the following number of
counts: