Visible photoluminescence of color centers in LiF crystals for advanced diagnostics of 18 and 27 MeV proton beams

被引：11

作者：

Piccinini, M. ^{[1
]}

Nichelatti, E. ^{[2
]}

Ronsivalle, C. ^{[1
]}

Ampollini, A. ^{[1
]}

Bazzano, G. ^{[1
]}

Bonfigli, F. ^{[1
]}

Nenzi, P. ^{[1
]}

Surrenti, V. ^{[1
]}

Trinca, E. ^{[1
]}

Vadrucci, M. ^{[1
]}

Vincenti, M. A. ^{[1
]}

Picardi, L. ^{[1
]}

Montereali, R. M. ^{[1
]}

机构：

[1] ENEA CR Frascati, Fus & Technol Nucl Safety & Secur Dept, Via E Fermi 45, I-00044 Rome, Italy

[2] ENEA CR Casaccia, Fus & Technol Nucl Safety & Secur Dept, Via Anguillarese 301, I-00123 Rome, Italy

来源：

RADIATION MEASUREMENTS | 2019年 / 124卷

关键词：

Lithium fluoride; Point defects; Fluorescence microscopy; Dose mapping; Proton Bragg curve; F-AGGREGATE CENTERS; LITHIUM-FLUORIDE;

D O I：

10.1016/j.radmeas.2019.03.010

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

Solid-state radiation detectors based on the visible photoluminescence of radiation-induced F-2 and F-3(+) color centers in lithium fluoride crystals have been used for advanced diagnostics of 18 and 27 MeV proton beams, produced by the TOP-IMPLART linear accelerator, which is under development for protontherapy applications at ENEA C.R. Frascati, Italy. Visible fluorescence microscopy was successfully used to read the latent proton beam images stored in the lithium fluoride crystals, thanks to high emission efficiency of the F-2 and F-3(+) color centers obtained by simultaneous optical excitation in the blue spectral range. High intrinsic spatial resolution and wide dynamic range of these novel LiF detectors allow obtaining two-dimensional images of both the beam transverse intensity distribution and of the Bragg curve. By using a simple defect formation model that takes into account the energy released in the material and the saturation of defect concentration, not only the two-dimensional dose map was obtained from the beam transverse intensity distribution image, but also the full Bragg curve was reconstructed, allowing the thorough characterization of proton beams produced by the accelerator.

引用

页码：59 / 62

页数：4

共 17 条

[1] Optical bands of F2 and F3+ centers in LiF [J].

Baldacchini, G ;

De Nicola, E ;

Montereali, RM ;

Scacco, A ;

Kalinov, V .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2000, 61 (01) :21-26

[2]

Baldacchini G., 1993, Defects in Insulating Materials, P1103

[3] Photoluminescence of F-aggregate centers in thermal neutron irradiated LiF TLD-100 single crystals [J].

Lakshmanan, AR ;

Madhusoodanan, U ;

Natarajan, A ;

Panigrahi, BS .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 1996, 153 (01) :265-273

[4] RADIATION-INDUCED COLOR-CENTERS IN LIF FOR DOSIMETRY AT HIGH ABSORBED DOSE-RATES [J].

MCLAUGHLIN, WL ;

MILLER, A ;

ELLIS, SC ;

LUCAS, AC ;

KAPSAR, BM .

NUCLEAR INSTRUMENTS & METHODS, 1980, 175 (01) :17-18

[5] Amplified spontaneous emission in active channel waveguides produced by electron-beam lithography in LiF crystals [J].

Montereali, RM ;

Piccinini, M ;

Burattini, E .

APPLIED PHYSICS LETTERS, 2001, 78 (26) :4082-4084

[6] OPTICAL PROPERTIES OF SOME F-AGGREGATE CENTERS IN LIF [J].

NAHUM, J ;

WIEGAND, DA .

PHYSICAL REVIEW, 1967, 154 (03) :817-&

[7] Bragg-curve imaging of 7 MeV protons in a lithium fluoride crystal by fluorescence microscopy of colour centres [J].

Nichelatti, E. ;

Piccinini, M. ;

Ampollini, A. ;

Picardi, L. ;

Ronsivalle, C. ;

Bonfigli, F. ;

Vincenti, M. A. ;

Montereali, R. M. .

EPL, 2017, 120 (05)

[8]

Patnaik P., 2002, HDB INORGANIC CHEM, Patent No. 5P37546-dc212002029526

[9] Proton beam spatial distribution and Bragg peak imaging by photoluminescence of color centers in lithium fluoride crystals at the TOP-IMPLART linear accelerator [J].

Piccinini, M. ;

Ronsivalle, C. ;

Ampollini, A. ;

Bazzano, G. ;

Picardi, L. ;

Nenzi, P. ;

Trinca, E. ;

Vadrucci, M. ;

Bonfigli, F. ;

Nichelatti, E. ;

Vincenti, M. A. ;

Montereali, R. M. .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2017, 872 :41-51

[10] Photoluminescence of radiation-induced color centers in lithium fluoride thin films for advanced diagnostics of proton beams [J].

Piccinini, M. ;

Ambrosini, F. ;

Ampollini, A. ;

Picardi, L. ;

Ronsivalle, C. ;

Bonfigli, F. ;

Libera, S. ;

Nichelatti, E. ;

Vincenti, M. A. ;

Montereali, R. M. .

APPLIED PHYSICS LETTERS, 2015, 106 (26)

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