IONIZING RADIATION INDUCED PHYSICAL PROCESSES IN ALKALI HALIDE CRYSTALS. I. CREATION OF COLOR CENTERS IN NaCl SINGLE CRYSTALS

Journal Article · Sun Jan 01 04:00:00 EST 1961 · Trudy Inst. Fiz. i Astron., Akad. Nauk Eston. S.S.R.

OSTI ID:4799656

Elango, M A

A comparative investigation was made of growth curves of x-ray induced F- and V/sub 2/-centers and thermal bleaching curves of F-centers in NaCl single crystals containing a different number of host and impurity defects. It was established that the x-ray induced growth of the nunmber of electronic (F) and hole (V/sub 2/) centers occurs in two stages. The first rapid stage depends on the pre-excitation number of vacancies in the crystal, the second, linear stage depends on the degree of the plastical deformation of the crystal. The ratio of the number of V/sub 2/-centers to Fcenters increases with excitaiion time. It was found that the greater the pre-excitation point defect number in the crystal, the lower is the thermal stability of the X-created F-centers in it. This effect is connected with the ionic mechanism of the thermal destruction of color centers. The mechanism of the creation of color centers by x-rays is discussed. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-013675
• OSTI ID: 4799656
• Journal Information: Trudy Inst. Fiz. i Astron., Akad. Nauk Eston. S.S.R., Journal Name: Trudy Inst. Fiz. i Astron., Akad. Nauk Eston. S.S.R. Vol. Vol: No. 17
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ANNEALING
BLEACHING
COLOR
CRYSTALS
DEFECTS
DEFORMATION
DISTRIBUTION
ELECTRONS
EXCITATION
EXPANSION
HEATING
HOLES
IMPURITIES
LATTICES
METALS, CERAMICS, AND OTHER MATERIALS
RADIATION EFFECTS
SODIUM CHLORIDES
STABILITY
X RADIATION