CaltechAUTHORS
  A Caltech Library Service

CsI:Tl^+,Yb^(2+): ultra-high light yield scintillator with reduced afterglow

Wu, Yuntao and Ren, Guohao and Nikl, Martin and Chen, Xiaofeng and Ding, Dongzhou and Li, Huanyin and Pan, Shangke and Yang, Fan (2014) CsI:Tl^+,Yb^(2+): ultra-high light yield scintillator with reduced afterglow. CrystEngComm, 16 (16). pp. 3312-3317. ISSN 1466-8033 . https://resolver.caltech.edu/CaltechAUTHORS:20140512-134025441

[img]
Preview
PDF - Published Version
See Usage Policy.

1623Kb
[img]
Preview
PDF - Supplemental Material
See Usage Policy.

151Kb

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140512-134025441

Abstract

The afterglow problem has been preventing CsI:Tl single crystal scintillators from being used for applications in the field of computer tomography and high-speed imaging. We show that Yb^(2+) codoping in CsI:Tl can reduce it at least by one order of magnitude after 50 ms from X-ray cut-off compared to ordinary CsI:Tl. After optimization of the Yb^(2+) and Tl^+ concentrations, the doubly doped CsI:Tl,Yb crystal exhibits an ultra-high light yield of 90 000 ± 6000 photons MeV^(−1), energy resolution 7.9%@511 keV and low afterglow level of about 0.035% at 80 ms. Simultaneous improvement in afterglow, light yield and energy resolution in CsI:Tl-based scintillators paves the way to its application in computer tomography and high-speed imaging. The physical mechanism and role of ytterbium ions in afterglow suppression are proposed.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://pubs.rsc.org/en/Content/ArticleLanding/2014/CE/c3ce42645a#!divAbstractPublisherArticle
http://dx.doi.org/ 10.1039/C3CE42645ADOIArticle
http://www.rsc.org/suppdata/ce/c3/c3ce42645a/c3ce42645a.pdfPublisherSupplementary Information
Additional Information:© 2014 Royal Society of Chemistry. Received 28th December 2013, Accepted 27th January 2014. This work was supported by the National Natural Science Foundation of China (grant no. 51372256) and State Key Laboratory of Rare Earth Resources Utilization (Grant No. RERU2014013). Partial support of the project of Sino-Czech collaboration funded by MEYS (Czech side), KONTAKT II, no. 12185 is also gratefully acknowledged.
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China51372256
State Key Laboratory of Rare Earth Resources UtilizationRERU2014013
Sino-Czech collaboration funded by MEYS (Czech side)UNSPECIFIED
KONTAKT II12185
Issue or Number:16
Record Number:CaltechAUTHORS:20140512-134025441
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140512-134025441
Official Citation:CsI:Tl+,Yb2+: ultra-high light yield scintillator with reduced afterglow Yuntao Wu, Guohao Ren, Martin Nikl, Xiaofeng Chen, Dongzhou Ding, Huanyin Li, Shangke Pan and Fan Yang CrystEngComm, 2014, 16, 3312-3317 DOI: 10.1039/C3CE42645A
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45694
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:12 May 2014 21:13
Last Modified:03 Oct 2019 06:34

Repository Staff Only: item control page