Alpha radiation-induced luminescence by am-241 in aqueous nitric acid solution

Thomas Kerst, Rikard Malmbeck, Nidhu L. lal Banik, Juha Toivonen

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
15 Downloads (Pure)

Abstract

When exposed to air, alpha particles cause the production of light by exciting the molecules surrounding them. This light, the radioluminescence, is indicative of the presence of alpha radiation, thus allowing for the optical sensing of alpha radiation from distances larger than the few centimeters an alpha particle can travel in air. While the mechanics of radioluminescence in air and other gas compositions is relatively well understood, the same cannot be said about the radioluminescence properties of liquids. Better understanding of the radioluminescence properties of liquids is essential to design methods for the detection of radioactively contaminated liquids by optical means. In this article, we provide radioluminescence images of Am-241 dissolved in aqueous nitric acid (HNO 3 ) solution and present the recorded radioluminescence spectrum with a maximum between and, and a steep decrease at the short wavelength side of the maximum. The shape of the spectrum resembles a luminescence process rather than Cerenkov light, bremsstrahlung, or other mechanisms with broadband emission. We show that the amount of light produced is about 150 times smaller compared to that of the same amount of Am-241 in air. The light production in the liquid is evenly distributed throughout the sample volume with a slight increase on the surface of the liquid. The radioluminescence intensity is shown to scale linearly with the Am-241 concentration and not be affected by the HNO 3 concentration.

Original languageEnglish
Article number1602
JournalSensors (Switzerland)
Volume19
Issue number7
DOIs
Publication statusPublished - 1 Apr 2019
Publication typeA1 Journal article-refereed

Keywords

  • Alpha radiation
  • Americium
  • Liquid phase luminescence
  • Radioluminescence

Publication forum classification

  • Publication forum level 1

ASJC Scopus subject areas

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Alpha radiation-induced luminescence by am-241 in aqueous nitric acid solution'. Together they form a unique fingerprint.

Cite this