Accession Number : AD0635044

Title :   THERMOLUMINESCENCE OF SEMICONDUCTING DIAMONDS,

Corporate Author : SOREQ RESEARCH ESTABLISHMENT ISRAEL ATOMIC ENERGY COMMISSION YAVNEH

Personal Author(s) : Halperin, A. ; Chen,R.

Report Date : JAN 1966

Pagination or Media Count : 26

Abstract : The thermoluminescence (TL) of semiconducting diamonds was found to be composed of blue-emitting (at 150 and 260K) and red-emitting peaks (at 175 and 285K). The red peaks could be excited by light of wavelengths up to about650 millimicrons (1.8 ev), the blue ones by light up to about 420 millimicrons (3 ev). The intensity of the red peaks and of the 150K blue peak was found to increase linearly with the dose of excitation. The same was found for the 260K blue peak on excitation at the absorption edge (225 millimicrons 5.5 ev). Excitation of this peak at 260-400 millimicrons was found to be superlinear; the peak increased under suitable conditions with the third power of the dose of excitation. Other measurements included the thermal activation energies, the optical bleaching of the glow peaks, and the decay of phosphorescence after excitation at 77K. A tentative model for the energy levels involved in the processes of excitation and emission of the TL is presented to account for the observations. A multiple-stage excitation is proposed to explain the superlinearity. (Author)

Descriptors :   (*LUMINESCENCE, *DIAMONDS), SEMICONDUCTORS, HEATING, EXCITATION, OPTICAL PHENOMENA

Subject Categories : Optics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE