Properties/crystal

CsI (Tl)

NaI (Tl )

Ce:Lu2SiO5

PbWO4

CdWO4

BGO

Ce:YAG

Crystal structure

cubic

cubic

Trigonal

Tetragonal

Monoclinic

Cubic

Cubic

Lattice constant ( A )

4.566

6.46

a=14.254b=10.241 c=6.641gamma=122.o

a = 5.416
c = 12.049

a=5.028, b=5.859
c=5.071, beta=91.519^o

a=10.103

a=12.01

Melting point, ^oC

651

651

2047

1123

1325

1050

1950

Density, g/cm³

4.51

3.67

7.4

8.28

7.9

7.13

4.55

Mohn hardness

2

2

5.8

3.5 - 4.0

4 - 4.5

5

8.5

Thermo expans 10^-6/K

50

18.4

19.5

10

10.2

0.7

0.8-0.9

Refractive index

1.79

1.85

1.82

2.16

2.2 - 2.3

2.15

1.82

Emission wavelength (nm )

540

410

418

450 / 420

470/540

480

550

Decay constant(ns )

900

230

0.94

36

20 ns @ 470nm
5 ms @ 540 nm

300

70

Radiation length ( cm )

1.86

2.9

/

0.92

0.3

1.1

3.5

Hygroscopic

slightly

yes

none

No

no

no

no

Afterglow % at 6ms

< 2

-

40 ns

-

0.1

<0.005

<0.005

Light yield [photons/MeVy]

52- 56 x10³

38 x 10³

/

22.6~ 25.6x 10⁴

1.2 - 1.5 x 10⁴

5.7-7.6 x 10³

1.5 x 10³

Crystal cleavage plane

none

(100)

Z

(101)

(010)

no

No

Growth method

Bridgman

Bridgman

Bridgman

CZ

CZ

Bridgman

CZ