Author:

Keywords:

Boson Peak, Neutron-irradiated quartz, Raman Scattering, Science & Technology, Physical Sciences, Physics, Condensed Matter, Physics, boson peak, neutron-irradiated quartz, Raman scattering, 0204 Condensed Matter Physics, 0206 Quantum Physics, 0303 Macromolecular and Materials Chemistry, General Physics, 5104 Condensed matter physics

Abstract:

In this paper we present Raman measurements in the low-frequency range from 15 to 150 cm(-1), which were performed in quartz crystal irradiated with fast neutron (irradiation dose 4.7 x 10(19) n/cm(2)). This dose leaves the sample mainly crystalline (70%). Our measurements revealed the presence of the boson peak at 60 cm(-1). The soft-potential model explains the boson peak in amorphous solids by the inelastic scattering of light by soft quasilocal harmonic oscillators (HO). Our observation shows that the irradiation dose 4.7 x 10(19) n/cm(2) is sufficient to create a concentration of quasilocal HO, which is necessary for the appearance of the boson peak. (C) 2002 Elsevier Science B.V. All rights reserved.