New Developments in Scintillators for Security Applications

Głodo, J.; Wang, Yimin; Shawgo, Ryan; Brecher, C.; Hawrami, R.; Tower, Joshua; Shah, K.S.

doi:10.1016/j.phpro.2017.09.012

Cited by 221 publications

(113 citation statements)

References 12 publications

Supporting

Mentioning

113

Contrasting

Order By: Relevance

“…All the samples showed emission lines due to the 4f-4f transitions of RE ions. The observed dominant emissions by the RE ions were as follows: emissions by Er 3+ were identified as the electronic transitions of 2 H 9/2 → 4 I 15/2 (400 nm), 4 F 5/2 → 4 I 15/2 (470 nm), 4 S 3/2 → 4 I 15/2 (550 nm), 4 S 3/2 → 4 I 13/2 (830 nm), 4 I 11/2 → 4 I 15/2 (1000 nm), and 4 I 13/2 → 4 I 15/2 (1550 nm); (39,40) emissions by Ho 3+ were identified as the electronic transitions of 3 D 3 → 5 I 6 (410 nm), 5 F 4 , 5 S 2 → 5 I 8 (550 nm), 5 S 2 → 5 I 7 (780 nm), 5 F 5 → 5 I 7 (1010 nm), and 5 I 6 → 5 I 8 (1200 nm); (24,31) emissions by Pr 3+ were identified as the electronic transitions of 3 P 0 → 3 H 4 (500 nm), 3 P 0 → 3 H 6 (610 nm), 3 P 0 → 3 F 4 (780 nm), 3 P 0 → 1 G 4 (960 nm), and 1 D 2 → 1 G 4 (1500 nm); (24,32,41) emissions by Tm 3+ were identified as the electronic transitions of 1 D 2 → 3 H 6 (350 nm), 1 D 2 → 3 F 4 (460 nm), 3 H 4 → 3 H 6 (800 nm), and 3 H 4 → 3 F 4 (1400 nm). (34,42) Furthermore, the 1% Pr 3+ -doped sample showed other emissions from 1000 to 1300 nm.…”

Section: Resultsmentioning

confidence: 98%

“…Inorganic scintillators are fluorescent materials that rapidly convert ionizing radiation to several thousands of low-energy photons. (1) They have been used widely in various fields such as medical imaging, (2) security, (3) environmental monitoring, (4) and high-energy physics. (5) Most of the recently developed inorganic scintillators consist of a host material and an emission center.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Akatsuka¹,

Nakauchi²,

Kato³

et al. 2020

Sensors and Materials

View full text Add to dashboard Cite

Scintillators emitting near-infrared (NIR) photons have unique characteristics and have been attracting attention recently. For example, scintillators emitting NIR photons are expected to be effective tools for radiation dose monitoring in high-dose environments. In this study, YAlO 3 samples doped with various rare-earth ions (Er 3+ , Ho 3+ , Pr 3+ , and Tm 3+ ) were synthesized by the floating zone method and their scintillation properties from the UV to NIR range were evaluated. Regarding their scintillation detection property, the Er 3+ -doped sample indicated an approximately linear proportional relationship from 1 mGy to 10 Gy.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Akatsuka¹,

Nakauchi²,

Kato³

et al. 2020

Sensors and Materials

View full text Add to dashboard Cite

show abstract

“…Another group of crystals capable of neutron detection are elpasolites, which include scintillators such as Cs 2 LiYCl 6 (CLYC) and Cs 2 LiLa(Br,Cl) 6 (CLLBC). When doped with Ce, these crystals present excellent n/g separation characteristics, as well as very high energy resolution [22]. An example of a capability for the use of PSD as a CLYC scintillator is presented in Figure 1.…”

Section: Detectors Utilising 6 LI Neutron Reactionmentioning

confidence: 99%

“…Similarly, it has been tested for its fast neutron sensitivity [37]. Despite a relatively good response in comparison to other counterparts tested, its low light yield makes it unsuitable for many applications [22].…”

Section: Detectors Utilising Other Properties Of Inorganic Crystalsmentioning

confidence: 99%

Critical Review of Scintillating Crystals for Neutron Detection

2019

View full text Add to dashboard Cite

There exists an ongoing need to develop and improve methods of detecting radioactive materials. As each radioactive isotope leaves a unique mark in a form of the particles it emits, new materials capable of detecting and measuring these particles are constantly sought. Neutrons and their detectors play a significant role in areas such as nuclear power generation, nuclear decommissioning and decontamination, border security, nuclear proliferation and nuclear medicine.Owing to the complexity of their detection, as well as scarcity of 3 He, which has historically been the preferred choice for neutron detection in many application fields, new sensitive materials are sought. Organic and inorganic scintillating crystals have been recognised as particularly good alternatives, and as such systems that utilise them are increasingly common. As they allow investigation of the neutron energy spectra, greater information about the radioactive source can be inferred. Therefore, in this article, an extensive review of scintillating crystals used for neutron detection is presented. By describing the history of scintillating crystals and discussing changes that occurred in their use and development of methods for radiation detection, the authors present a comprehensive overview of the current situation. Supported by a practical example, possible future directions of the research area are also presented.

show abstract

“…Scintillators utilizing inorganic luminescent materials have a function to immediately convert ionizing radiation into low-energy photons, so they have been attracting considerable interest in response to increasing demands of radiation detection including medical imaging, (1) security, (2) astrophysics, (3) environmental monitoring, (4) and resource exploration, e.g., oildwelling. (5) In recent years, a divalent europium (Eu 2+ ) center has attracted attention as a luminescent center of scintillators.…”

Section: Introductionmentioning

confidence: 99%

Luminescence and Scintillation Properties of Eu-doped CaAl2O4 Bulk Crystals

Nakauchi¹,

Kawaguchi²,

Yanagida³

2019

Sensors and Materials

View full text Add to dashboard Cite

Eu-doped CaAl 2 O 4 bulk crystals were synthesized by the floating zone (FZ) method, and their photoluminescence (PL) and scintillation properties were investigated firstly in a bulk crystal. The crystal samples exhibit PL and radioluminescence (RL) with a broad emission peaking around 440 nm as well as sharp peaks appearing around 600 nm, which are similarly observed for powder samples. Suggested from the decay time constants, they are attributed to the 5d-4f transitions of Eu 2+ and the 4f-4f transitions of Eu 3+ , respectively. From the pulse height spectrum under 241 Am γ-ray (59.5 keV) exposure, the light yield (LY) of a 3.0% Eu:CaAl 2 O 4 bulk crystal is approximately 12000 ph/MeV.

show abstract

New Developments in Scintillators for Security Applications

Cited by 221 publications

References 12 publications

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Optical and Scintillation Properties of YAlO3 Doped with Rare-Earths Emitting Near-infrared Photons

Critical Review of Scintillating Crystals for Neutron Detection

Luminescence and Scintillation Properties of Eu-doped CaAl2O4 Bulk Crystals

Contact Info

Product

Resources

About