Erasure of elementary holograms in LiNbO3:Fe by neutron irradiation

被引：0
|
作者：
Mandula, G. [1 ]
Rupp, R. A. [2 ]
Balasko, M. [3 ]
机构：
[1] Res Inst Solid State Phys & Opt, POB 49, H-1525 Budapest, Hungary
[2] Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria
[3] KFKI Atom Energy Res Inst, H-1121 Budapest, Hungary
来源：
HOLOGRAPHY 2005: INTERNATIONAL CONFERENCE ON HOLOGRAPHY, OPTICAL RECORDING, AND PROCESSING OF INFORMATION | 2006年 / 6252卷
基金：
匈牙利科学研究基金会;
关键词：
photorefractive grating; elementary hologram; lithium niobate; neutron irradiation; neutron dosimeter;
D O I：
10.1117/12.676860
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Experimental studies on the erasure effect of thermal neutron irradiation on elementary photorefractive hologram in LiNbO3:Fe single crystals are reported. This phenomenon results from the large effective cross-section of Li-6 for thermal neutrons and from the large number of the electrons excited to the conduction band by the kinetic energy that is released during the neutron generated alpha-decay of Li-6 nuclei. The excited electrons decrease the electric space-charge field of the previously recorded holographic grating and decrease its diffraction efficiency. The sensitivity threshold of the effect is better than 53 mSv (4 x 10(9) cm(-2) fluence) at neutron energy of 0.17 eV. Discussion of potential application of the phenomenon is also given.
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页数：5
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