scholarly journals Nanometer-Sized Boron Loaded Liposomes Containing Fe3O4 Magnetic Nanoparticles and Tributyl Borate and Anti-Albumin from Bovine Serum Antibody for Thermal Neutron Detection

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3040
Author(s):  
Wei Zhang ◽  
Kaikai Wang ◽  
Xiaodan Hu ◽  
Xiaohong Zhang ◽  
Shuquan Chang ◽  
...  

A shortage in the supply of 3He used for thermal neutron detector makes researchers to find 3He alternatives for developing new neutron detectors. Here, we prepared a neutron-sensitive composite liposome with tributyl borate and encapsulating with Fe3O4@oleic acid nanoparticles (Fe3O4@OA NPs), methylene blue (MB), or anti-albumin from bovine serum (anti-BSA). The tributyl borate compound was characterized by Fourier transform infrared spectroscopy (FT-IR). In addition, the morphology, element compositions, and magnetic properties of the composite liposome were investigated with transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), and vibrating sample magnetometer (VSM), respectively. The results indicated that a typical ellipsoidal magnetic liposome structure was obtained, and the lengths of the minor axis and major axis were 49 ± 1 nm and 87 ± 3 nm, respectively. Under thermal neutron irradiation, the structure of composite liposome was destroyed, and encapsulated reporter molecules were released, which was detected by ultraviolet–visible (UV–vis) spectroscopy and surface plasmon resonance (SPR) technology. The response of this sensor based on a destructive assay shows a good correlation with neutron doses. Besides, the sensor has a neutron to gamma-ray rejection ratio of 1568 at a thermal neutron flux rate of 135.6 n/cm2·s, which makes it a promising alternative to 3He.

2005 ◽  
Vol 52 (6) ◽  
pp. 3151-3156 ◽  
Author(s):  
A. Syntfeld ◽  
M. Moszynski ◽  
R. Arlt ◽  
M. Balcerzyk ◽  
M. Kapusta ◽  
...  

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Andrew N. Mabe ◽  
John D. Auxier ◽  
Matthew J. Urffer ◽  
Stephen A. Young ◽  
Dayakar Penumadu ◽  
...  

Thin film polystyrene composite scintillators containing LiF6 and organic fluors have been fabricated and tested as thermal neutron detectors. Varying fluorescence emission intensities for different compositions are interpreted in terms of the Beer-Lambert law and indicate that the sensitivity of fluorescent sensors can be improved by incorporating transparent particles with refractive index different than that of the polymer matrix. Compositions and thicknesses were varied to optimize the fluorescence and thermal neutron response and to reduce gamma-ray sensitivity. Neutron detection efficiency and neutron/gamma-ray discrimination are reported herein as functions of composition and thickness. Gamma-ray sensitivity is affected largely by changing thickness and unaffected by the amount of LiF6 in the film. The best neutron/gamma-ray discrimination characteristics are obtained for film thicknesses in the range 25–150 μm.


2011 ◽  
Vol 222 ◽  
pp. 146-149 ◽  
Author(s):  
Takahiro Nishioka ◽  
Aki Miyake ◽  
Shailendra Singh ◽  
Hisashi Morii ◽  
Hidenori Mimura ◽  
...  

Thermal neutron detector is developed by using Cadmium telluride (CdTe) semiconductor, due to large thermal neutron capture cross section of Cd. The developed detector demonstrated the occurrence of the 96 keV gamma ray emissions from 113Cd(n, γ) 114Cd reaction.


2021 ◽  
Vol 16 (11) ◽  
pp. P11039
Author(s):  
P. Stowell ◽  
S. Fargher ◽  
C. Steer ◽  
L.F. Thompson

Abstract Cosmic Ray Neutron Sensing (CRNS) is a powerful technique that allows non-invasive monitoring of soil moisture on length scales well matched for agricultural applications. One factor limiting the use of the technique within industrial agriculture settings is the high initial cost of Helium-3 or BF3 tubes typically used for ground level neutron monitoring. This paper discusses the use of Geant4 to design and optimise an alternative scintillator based epi-thermal neutron detector that may be applicable for challenges where cost is a higher driving factor than temporal resolution.


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