Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Nanoparticles show promise as inexpensive, durable and effective scintillators

Abstract:
A team of industrial and university researchers has shown that nanoparticles with sizes smaller than 10 nanometers - approximately the width of a cell membrane - can be successfully incorporated into scintillation devices capable of detecting and measuring a wide energy range of X-rays and gamma rays emitted by nuclear materials.

Nanoparticles show promise as inexpensive, durable and effective scintillators

College Park, MD | Posted on March 25th, 2013

The proof-of-concept study, described in the Journal of Applied Physics, suggests that "nanocrystals" - nanoparticles clustered together to mimic the densely-packed crystals traditionally used in scintillation devices - may one day yield radiation detectors that are easy and inexpensive to manufacture, can be produced quickly in large quantities, are less fragile, and capture most of the X-ray and gamma ray energies needed to identify radioactive isotopes. Earlier studies have shown that when X-rays or gamma rays strike these miniature, non-crystalline scintillators, some atoms within them are raised to a higher energy level. These atoms de-excite and give off their energy as optical photons in the visible and near-visible regions of the electromagnetic spectrum. The photons can be converted to electrical pulses, which, in turn, can be measured to quantify the X-ray and gamma radiation detected and help locate its source.

In the latest experiment, the researchers suspended nanoparticles of lanthanum halide and cerium tribromide (loaded in both 5 percent and 25 percent concentrations) in oleic acid to create nanocomposite scintillators with sizes between 2-5 nanometers. When compared to computer models and data from prior studies, the nanocomposite detectors matched up well in their ability to discern X-rays and gamma radiation. When compared to an existing radiation detection system of similar size that uses plastic, the 25 percent loaded nanocomposite fared better than the 5 percent loaded, but still was only about half as efficient. Therefore, the researchers conclude that more work is needed to refine and optimize their "nanocrystal" system.

Authors: Paul Guss (1), Ronald Guise (1), Ding Yuan (2), Sanjoy Mukhopadhyay (3), Robert O'Brien (4), Daniel Lowe (4), Zhitao Kang (5), Hisham Menkara (5), and Vivek V. Nagarkar (6).

(1) Remote Sensing Laboratory (Las Vegas, Nev.)

(2) National Security Technologies, LLC (Los Alamos, N.M.)

(3) Remote Sensing Laboratory - Andrews (Andrews AFB, Md.)

(4) University of Nevada, Las Vegas (Las Vegas, Nev.)

(5) Georgia Tech Research Institute (Atlanta, Ga.)

(6) RMD, Inc. (Watertown, Mass.)

####

For more information, please click here

Contacts:
Catherine Meyers

301-209-3088

Copyright © American Institute of Physics (AIP)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

Article: "Lanthanum Halide Nanoparticle Scintillators for Nuclear Radiation Detection," is published in the Journal of Applied Physics:

Related News Press

News and information

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

Nanoparticles could spur better LEDs, invisibility cloaks July 19th, 2017

Sensors

Giant enhancement of electromagnetic waves revealed within small dielectric particles: Scientists have done for the first time direct measurements of giant electromagnetic fields July 8th, 2017

Bosch announces high-performance MEMS acceleration sensors for wearables June 27th, 2017

Letiís Autonomous-Vehicle System Embedded in Infineonís AURIX Platform: Letiís Low-Power, Multi-Sensor System that Transforms Distance Data into Clear Information About the Driving Environment Will Be Demonstrated at ITS Meeting in Strasbourg, June 19-22 June 20th, 2017

New diode features optically controlled capacitance: Israeli researchers have developed a new optically tunable capacitor with embedded metal nanoparticles, creating a metal-insulator-semiconductor diode that is tunable by illumination. June 8th, 2017

Discoveries

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Here's a tip: Indented cement shows unique properties: Rice University models reveal nanoindentation can benefit crystals in concrete July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

Announcements

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Here's a tip: Indented cement shows unique properties: Rice University models reveal nanoindentation can benefit crystals in concrete July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Semiliquid chains pulled out of a sea of microparticles July 20th, 2017

Here's a tip: Indented cement shows unique properties: Rice University models reveal nanoindentation can benefit crystals in concrete July 20th, 2017

Tokyo Institute of Technology research: Antiaromatic molecule displays record electrical conductance July 19th, 2017

Harnessing light to drive chemical reactions July 19th, 2017

Tools

Coupling a nano-trumpet with a quantum dot enables precise position determination July 14th, 2017

Nanometrics to Announce Second Quarter Financial Results on August 1, 2017 July 14th, 2017

Nanometrics Introduces SpectraProbe Analysis Software: Advanced software and algorithms enhancing Nanometrics metrology fleet capabilities fab-wide July 13th, 2017

The Physics Department of Imperial College, London, uses the Quorum Q150T to deposit metals and ITO to make plasmonic sensors and electric contact pads July 13th, 2017

Research partnerships

Studying Argon Gas Trapped in Two-Dimensional Array of Tiny "Cages": Understanding how individual atoms enter and exit the nanoporous frameworks could help scientists design new materials for gas separation and nuclear waste remediation July 17th, 2017

Coupling a nano-trumpet with a quantum dot enables precise position determination July 14th, 2017

GLOBALFOUNDRIES and VeriSilicon To Enable Single-Chip Solution for Next-Gen IoT Networks: Integrated solution leverages GFís 22FDXģ technology to decrease power, area, and cost for NB-IoT and LTE-M applications July 14th, 2017

Carbon displays quantum effects July 13th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project