Accession Number : AD0635868

Title :   SUPERLINEAR EXCITATION OF THERMOLUMINESCENCE IN DIAMOND.

Corporate Author : SOREQ RESEARCH ESTABLISHMENT ISRAEL ATOMIC ENERGY COMMISSION YAVNEH

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

Report Date : APR 1966

Pagination or Media Count : 11

Abstract : The thermoluminescence (TL) of semiconducting diamonds and its dependence on the wavelength of the exciting light and on the dose of excitation was investigated. The strongest glow peak appearing at about 250K, was found to rise linearly with the dose on excitation at the absorption edge (225 millimicrons), but showed a strong superlinear effect on irradiation with longer wavelengths (280 - 400 millimicrons). With light near 360 millimicrons this peak was found to rise with the third power of the dose. Illumination with longer wavelengths (500 - 1000 millimicrons) followed by uv (280 - 400 millimicrons) resulted in an enhancement of the TL intensity and a reduction in the power factor of the dependence on the dose, compared to those obtained on illumination with the uv light only. Multistage excitation is proposed to account for the observed superlinearity. The illumination with long wavelengths prior to the uv excitation is assumed to excite electrons to one of the intermediate stages. (Author)

Descriptors :   (*SEMICONDUCTORS, LUMINESCENCE), (*DIAMONDS, *LUMINESCENCE), CRYSTALS, EXCITATION, LIGHT, INTENSITY, ULTRAVIOLET RADIATION, ELECTRONS, BAND THEORY OF SOLIDS, ISRAEL

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE