LaCl3

LaCl3:Ce scintillation crystals (0.9 % Ce)

LaCl3:Ce scintillation crystals offer an alternative to NaI(Tl) for gamma spectrometric applications. Above a gamma energy of about 200 keV, the energy resolution of LaCl3:Ce is superior to NaI(Tl). Due to the presence of natural Lanthanum, LaCl3 has a natural beta background between 240 and 1560 keV. In addition to that lines, at 34 keV and 1435 keV can be observed (see data below).

For quality assurance reasons LaCl3:Ce crystals are only supplied in combination with photomultiplier tubes in integral assemblies.

Good energy resolution, Fast emission, Excellent linearity response, High count rate capabilities, High Light Output
Medical SPECT, Security, Oil & Gas Exploration - core logging, Industrial, Physics

Radiological Background LaCl3:Ce

Background numbers apply to relative small (maximum 38 x 38 mm) crystals

  • Total 1.16 c/s/cc
  • 34 keV 0.78 c/s/cc
  • Beta 0.34 cps/cc (240 keV – 1560 keV)
Nuclide Energy (keV) Resolution FWHM
Ba-133 32 keV 21.0 %
Ba-133 81 keV 10.30%
Ba-133 356 keV 4.10%
Cs-137 662 keV 3.5 %
Co-60 1173 keV 2.2 %
Co-60 1332 keV 2.1 %
NaI(Tl) LaCl₃:Ce
Relative photoelectron Yield 95-100 95-100
Energy [ keV] Typical Energy Resolution [%]
30 18 25
60 12 16
81 11 13
122 9 12
356 8 6
511 7 5
662 6.5 4.5
1332 4.9 3
2600 4 2.5
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