Thallium magnesium chloride: A high light yield, large effective atomic number, intrinsically activated crystalline scintillator for X-ray and gamma-ray detection

2016 ◽  
Vol 55 (9) ◽  
pp. 090301 ◽  
Author(s):  
Yutaka Fujimoto ◽  
Masanori Koshimizu ◽  
Takayuki Yanagida ◽  
Go Okada ◽  
Keiichiro Saeki ◽  
...  
Keyword(s):  
Atomic Number ◽  
Magnesium Chloride ◽  
Gamma Ray ◽  
Effective Atomic Number ◽  
Light Yield ◽  
High Light ◽  
X Ray ◽  
High Light Yield

High Resolution X-Ray Imaging with Thin SrI2-Scintillator Screens

2013 ◽  
Vol 1576 ◽  
Author(s):  
Leonard Alaribe ◽  
Alex Fauler ◽  
Angelica Cecilia ◽  
Tomy Dos Santos Rolo ◽  
Michael Fiederle ◽  
...  
Keyword(s):  
High Resolution ◽  
Spatial Resolution ◽  
Effective Atomic Number ◽  
Light Yield ◽  
High Light ◽  
Excellent Performance ◽  
X Ray ◽  
X Ray Imaging ◽  
High Light Yield ◽  
Application Fields

ABSTRACTMuch has been reported on the excellent performance of the Eu2+ activated SrI2-scintillator in spectroscopic applications, like the high light yield (97 660 ph/MeV) and good energy resolution (2.7% FWHM at 662 keV). The exploitation of these properties for other application fields is limited by the hygroscopic nature of the SrI2. Single crystal scintillating screens exhibit high spatial resolution, this combined with the high density, high effective atomic number, and the high light yield of the SrI2 could be used for high resolution X-ray imaging.Some of the questions we tried to answer in this work are the following: owing to the excellent performance of the SrI2-scintillator in spectroscopic applications, how would it perform in X-ray imaging applications. X-ray images are described based on their (spatial) resolution and contrast, how would they look like when recorded using the SrI2-scintillator detector.First a packaging technique was developed that protected the hygroscopic screens during the measurements. Our results show a high resolution of the images obtained with thin SrI2-scintillator screens both in 2D radiography and 3D tomography measurements. With these results, we think that the SrI2-scinitillator is not only a candidate for spectroscopic applications, but also for high resolution X-ray imaging purposes.

scholarly journals New Intrinsic Scintillator with Large Effective Atomic Number: Tl2HfCl6 and Tl2ZrCl6 Crystals for X-ray and Gamma-ray Detections

2018 ◽  
Vol 30 (7) ◽  
pp. 1577 ◽  
Author(s):  
Yutaka Fujimoto ◽  
Keiichiro Saeki ◽  
Daisuke Nakauchi ◽  
Takayuki Yanagida ◽  
Masanori Koshimizu ◽  
...  
Keyword(s):  
Atomic Number ◽  
Gamma Ray ◽  
Effective Atomic Number ◽  
X Ray

High Light Yield of Sr8(Si4O12)Cl8:Eu2+ under X-ray Excitation and Its Temperature-Dependent Luminescence Characteristics

2014 ◽  
Vol 26 (12) ◽  
pp. 3709-3715 ◽  
Author(s):  
Chunmeng Liu ◽  
Zeming Qi ◽  
Chong-Geng Ma ◽  
Pieter Dorenbos ◽  
Dejian Hou ◽  
...  
Keyword(s):  
Light Yield ◽  
High Light ◽  
Temperature Dependent ◽  
X Ray ◽  
High Light Yield ◽  
Luminescence Characteristics

Comparative Studies of CsI(Tl), LYSO and BGO Scintillators

2016 ◽  
Vol 675-676 ◽  
pp. 760-763
Author(s):  
P. Prongsamrong ◽  
Pruittipol Limkitjaroenporn ◽  
W. Chaiphaksa ◽  
J. Kaewkhao
Keyword(s):  
Cross Section ◽  
Comparative Studies ◽  
Gamma Ray ◽  
Light Yield ◽  
Photoelectric Effect ◽  
High Light ◽  
Cross Section Ratio ◽  
High Light Yield ◽  
Inorganic Scintillators ◽  
Better Than

Inorganic scintillators of CsI(Tl), LYSO and BGO crystals were characterized using photomultiplier tube R1306 PMT readout for gamma ray detection. The photoelectron yield, light yield and photofraction were measured at gamma energies in range 59.5 keV to 1332 keV. It is found that the photoelectron yield of LYSO is much better than that of CsI(Tl) and BGO crystals. CsI(Tl) crystal showed the high light yield of 63855.25 ph/MeV in this energy range, which is better than that of LYSO and BGO crystals. The photofraction for all crystals was determined and compared with the cross-section ratio for the photoelectric effect to the total one which calculated by WinXCom program.

Gamma and X-Ray Shielding Properties of Various Types of Steels

2019 ◽  
Vol 5 (4) ◽  
Author(s):  
H. C. Manjunatha ◽  
L. Seenappa
Keyword(s):  
Attenuation Coefficient ◽  
Atomic Number ◽  
Gamma Ray ◽  
Effective Atomic Number ◽  
Mass Attenuation Coefficient ◽  
Buildup Factor ◽  
X Ray ◽  
Steel Type ◽  
Gamma Radiations ◽  
Mass Attenuation

We have calculated the gamma and X-ray shielding parameters such as mass attenuation coefficient, half value layer (HVL), tenth value layer (TVL), specific gamma ray constant, effective atomic number, and buildup factors in various steels. By studying these X-ray and gamma interaction parameters, we have selected the best steel which can be used for the X-ray and gamma shielding material. The steel type 20Mo-4 is having higher values of mass attenuation coefficient, specific gamma ray constant, effective atomic number, and buildup factor and smaller values of HVL and TVL. A detail analysis of X-ray/gamma interaction in the different steels reveals that the steel type (S15) 20Mo-4 is good absorption of both X-ray/gamma radiations.

A Spectrum-Adaptive Decomposition Method for Effective Atomic Number Estimation Using Dual Energy CT

2020 ◽  
Vol 2020 (14) ◽  
pp. 293-1-293-7
Author(s):  
Ankit Manerikar ◽  
Fangda Li ◽  
Avinash C. Kak
Keyword(s):  
Atomic Number ◽  
Decomposition Method ◽  
Traditional Approach ◽  
Effective Atomic Number ◽  
Dual Energy ◽  
Performance Comparison ◽  
Estimation Methods ◽  
Dual Energy Ct ◽  
Projection Data ◽  
X Ray

Dual Energy Computed Tomography (DECT) is expected to become a significant tool for voxel-based detection of hazardous materials in airport baggage screening. The traditional approach to DECT imaging involves collecting the projection data using two different X-ray spectra and then decomposing the data thus collected into line integrals of two independent characterizations of the material properties. Typically, one of these characterizations involves the effective atomic number (Zeff) of the materials. However, with the X-ray spectral energies typically used for DECT imaging, the current best-practice approaches for dualenergy decomposition yield Zeff values whose accuracy range is limited to only a subset of the periodic-table elements, more specifically to (Z < 30). Although this estimation can be improved by using a system-independent ρe — Ze (SIRZ) space, the SIRZ transformation does not efficiently model the polychromatic nature of the X-ray spectra typically used in physical CT scanners. In this paper, we present a new decomposition method, AdaSIRZ, that corrects this shortcoming by adapting the SIRZ decomposition to the entire spectrum of an X-ray source. The method reformulates the X-ray attenuation equations as direct functions of (ρe, Ze) and solves for the coefficients using bounded nonlinear least-squares optimization. Performance comparison of AdaSIRZ with other Zeff estimation methods on different sets of real DECT images shows that AdaSIRZ provides a higher output accuracy for Zeff image reconstructions for a wider range of object materials.

High light yield Ce3+-doped dense scintillating glasses

2013 ◽  
Vol 581 ◽  
pp. 801-804 ◽  
Author(s):  
Qian Wang ◽  
Bin Yang ◽  
Yuepin Zhang ◽  
Haiping Xia ◽  
Tianchi Zhao ◽  
...  
Keyword(s):  
Light Yield ◽  
High Light ◽  
High Light Yield

Electron Density and Effective Atomic Number Measurement by Using a Newly Developing Photon Counting CT System

2020 ◽  
Vol 38 ◽  
pp. 93-99
Author(s):  
Hiroshi Sakurai ◽  
Kazushi Hoshi ◽  
Yosuke Harasawa ◽  
Daiki Ono ◽  
Kun Zhang ◽  
...  
Keyword(s):  
Electron Density ◽  
Atomic Number ◽  
Photon Counting ◽  
Effective Atomic Number ◽  
Image Data ◽  
Detector Response ◽  
Simple Method ◽  
Attenuation Coefficients ◽  
X Ray ◽  
Ct System

We developed the photon counting CT system by using a conventional laboratory X-ray source and a CdTe line sensor. Attenuation coefficients were obtained from the measured CT image data. Our suggested method for deriving the electron density and effective atomic number from the measured attenuation coefficients was tested experimentally. The accuracy of the electron densities and effective atomic numbers are about <5 % (the averages of absolute values are 2.6 % and 3.1 %, respectively) for material of 6< Z and Zeff <13. Our suggested simple method, in which we do not need the exact source X-ray spectrum and detector response function, achieves comparable accuracy to the previous reports.

Sign in / Sign up

Export Citation Format

Share Document