Piezoluminescence:experimental data analysis

Maciej Grzesiak, Jadwiga Jeziorska, Tomasz Ostafin

Opole University

Supervisor: mgr Grzegorz Bujnarowski

Purpose of the exercise

Analysis of mechanical stresses with method of the spectroscopy in tester of

ruby subjected to irradiating with bundle of heavy ions of the radiation in the function

of the dose absorbed and in the function of the depth.

Piezoluminescence

Changes in the luminescent radiation triggered with mechanical stresses.

It manifesting through the appearance in the spectra of additional lines or strips (with

additional centres of the luminescence e.g. vacancies ). These stresses influence to existing spectral lines which can cause

shift them.

TimeOfFlight

Cyclotron

B

E

670 MeV

Experiment Experiment

Bombed sample Measuring the profile of the bundle

Spectograph Shamrock SR - 303i.

Shamrock SR – 303i parameters.

Focal lenght (mm) 303

Aperture f/4

Raciprocal dispersion ( nm/mm, nominal)

2.6

Mechanical scan range (nm) 0 to 1450

Wavelenght resolution ( nm) 0.1

Wavelenght accuracy (nm) +/- 0.2

Wavelenght reproducibility (nm) +/- 0.05

Focal plane size ( mm, WxH) 28 x 14

Stray light ( meansured AT 20 nm from 633 nm laser line)

1.5 x10 -4

Experimental parameters of Shamrock SR – 303i• filter – no filter• beam energy – 670 MeV• pattern’s temperature – 77,35 K• angle beetwen pattern and beam - 60 degrees• work temperature of CCD’s camera - - 60 degrees.(C)

CCD cameraGrating

• Motorised Slits Cover Plates:used to control the effectiveheight of the entrance slit(various sizes available)

FLOW DIAGRAM.

Principle of confocal laser scanning microscope

• A laser beam passes a light source aperture, then is focused by an objective lens into a small focal volume within a fluorescent speciment.

• A beam splitter separated the light mixture by allowing only the laser light to pass through and reflecting the fluorescent light intothe detection appararus. After passing a aperture the fluorescent light is detected

50 100 150 200 250 300

-26

-24

-22

-20

-18

-16

-14

-12

-10

-8

-6 ruby10 and 2s

cm-1

]

T [K]

14400 14440 14480

0

2000

4000

6000

inte

nsity

,a.u

.

wavenumber, cm-1293 K 77,35 K

Curve of the temperature relation for tester of ruby which for calibrating of curves served for two temperatures it is of liquefied nitrogen (77.35 K) and for room temperature (293 K).

Spectre of tester of aroused ruby with laser lighting for two exchanged temperatures.

14420 14440 14460

0

1000

2000

3000

4000

inte

nsity

[ a

.u]

wavenumber [cm-1]

Model spectrum at the temperature of 77,35 degrees (Kelvin).

As you can see maxsimum of the R2 peak is about 14460,19 cm-1 ,which is correct with results shown for the temperature’s model spectrum.

R2 peak

max

The graph describing the change of the amplitude and shift spectral lines triggered with rise of heavy ion’s dose .

R2 peak

R2 peak is about 14442,943 cm-1 ,which is correct with results shownfor the temperature’s model spectrum.

14280 14340 14400 14460 14520

0

25000

50000

75000

100000

125000

150000

inte

nsity

, a.

u.

wavenumber, cm-114442,943cm-1

14250 14300 14350 14400 14450 14500 14550

0

20000

40000

60000

80000

100000

120000

140000

160000

180000

inte

nsi

ty, a

.u.

wavenumber, cm-1

Model spectrum in the room temperature

The graph describing the change of the amplitude depending on depth

poczdv 222 )(

61.72v

h

-0,4

-0,2

0,0

0,2

0,00E+000 5,00E+011 1,00E+012 1,50E+012-4

-2

0

2

h[G

Pa]

dose [ion/cm2]

[c

m-1]

This graph is presenting a dependence of the tension on an accepted dose of radiation.

-0,12

-0,10

-0,08

-0,06

-0,04

-0,02

0,00

0,02

0,04

0 10 20 30 40

-0,8

-0,6

-0,4

-0,2

0,0

0,2

0,4

2, c

m-1

depth, m

h , G

Pa

On this slide we can see a change of putting the maximum of the R2 depending on the depth

222 x

Thanks for coordinators of Bogoliubov - Infeld programme ,Mr R. Zawodny and Mr W. Chmielowski and for the entire UC board of directors and of course our supervisor Mr. G. Bujnarowski for spending a beatifull moments in Dubna.

Thanks for attention