Effect of 50 MeV Li3+ ion irradiation on electrical, optical and mechanical properties of 4,4′-dimethylbenzophenone

被引：11

作者：

Babu, G. Anandha ^{[1
]}

Ramasamya, P. ^{[1
]}

Vijayan, N. ^{[2
]}

Kanjilal, D. ^{[3
]}

Asokan, K. ^{[3
]}

机构：

[1] SSN Coll Engn, Ctr Crystal Growth, Kalavakkam 603110, India

[2] Natl Phys Lab, Mat Characterizat Div, New Delhi 110012, India

[3] Inter Univ Accelerator Ctr, New Delhi 110067, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2008年 / 266卷 / 23期

关键词：

Irradiation effect; Dielectric properties; Mechanical properties;

D O I：

10.1016/j.nimb.2008.09.014

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

4,4'-Dimethylbenzophenone (DMBP) single crystals were irradiated at room temperature and at liquid nitrogen temperature with 50 MeV Li3+ ions at fluences 1 x 10(12) and 1 X 10(13) ions/cm(2). The dielectric constant and dielectric loss as a function of frequency of the applied ac field in the range from 20 Hz to 1 MHz and at temperatures ranging from 313 to 353 K were analyzed. The dielectric constant decreases with increase in frequency for all the temperatures. The dielectric constant and dielectric loss increase with fluence. Optical absorption was measured at different conditions. UV-Vis studies reveal the decrease in bandgap. The unirradiated as well as irradiated crystals were characterized by photoluminescence. Ion-induced changes were also studied with respect to their mechanical response using the Vicker's microhardness technique and parameters including fracture toughness, brittleness index and yield strength are calculated. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：5032 / 5036

页数：5

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