Exciton-exciton interactions in CdWO4 irradiated by intense femtosecond vacuum ultraviolet pulses

被引：52

作者：

Kirm, M. ^{[1
]}

Nagirnyi, V. ^{[1
]}

Feldbach, E. ^{[1
]}

De Grazia, M. ^{[2
]}

Carre, B. ^{[2
]}

Merdji, H. ^{[2
]}

Guizard, S. ^{[3
,4
]}

Geoffroy, G. ^{[3
,4
]}

Gaudin, J. ^{[5
]}

Fedorov, N. ^{[6
,7
]}

Martin, P. ^{[6
,7
]}

Vasil'ev, A. ^{[8
]}

Belsky, A. ^{[9
]}

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

[2] CEA Iramis, Serv Photons Atomes & Mol, F-91191 Gif Sur Yvette, France

[3] CNRS, CEA Iramis, Solides Irradies Lab, F-91128 Palaiseau, France

[4] Ecole Polytech, F-91128 Palaiseau, France

[5] European XFEL, D-22607 Hamburg, Germany

[6] CEA, CNRS, Lab CELIA, F-33400 Talence, France

[7] Univ Bordeaux 1, F-33400 Talence, France

[8] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia

[9] Univ Lyon 1, Lab Physicochim Mat Luminescents, CNRS, UMR5620, F-69622 Villeurbanne, France

来源：

PHYSICAL REVIEW B | 2009年 / 79卷 / 23期

关键词：

CADMIUM TUNGSTATE SCINTILLATORS; NON-PROPORTIONALITY; LUMINESCENCE; EXCITATION; CRYSTALS; DECAY; RELAXATION; ABSORPTION; STATE;

D O I：

10.1103/PhysRevB.79.233103

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Exciton-exciton interaction is experimentally revealed and quantitatively analyzed in a wide band-gap scintillator material CdWO4. Under high-intensity femtosecond vacuum ultraviolet excitation, the CdWO4 luminescence is quenched, while its decay becomes essentially nonexponential. We propose an analytical model, which successfully reproduces the decay kinetics recorded in a wide range of excitation densities. The dipole-dipole interaction between excitons leading to their nonradiative decay is shown to be the main cause of a nonproportional response common for many scintillators.

引用

页数：4

共 24 条

[1] Charged Frenkel excitons in organic crystals [J].