Monitoring of neutron flux changes in short-lived neutron activation analysis

  • S. Landsberger
  • K. Dayman


It is well known variations in neutron fluxes can adversely affect the final result in neutron activation analysis. The monitoring of neutron flux changes are usually described for medium and long-lived NAA using foils of cobalt, gold, zirconium, etc. However, for short-lived neutron activation analysis there appears to be no systematic study of the variations of the neutron flux. With our new automatic pneumatic system, where irradiation timing, decay and counting and position are very reproducible, we have performed a series of experiments using thermal and epithermal neutrons using aluminum wire as a monitor to monitor the neutron fluxes. Our experiments confirm that neutron flux fluctuations in the worst case can be up to ±12 % with a SD of 2–3 %. This effect can be seen regardless of the irradiation time and must be taken into consideration to achieve the best result.


Neutron activation analysis Neuron flux variations Flux monitoring 


  1. 1.
    Robouch P, Arana G, Eguskiza M, Pommé S, Etxebarria N (2000) J Radioanal Nucl Chem 245:195–197CrossRefGoogle Scholar
  2. 2.
    Smodiš B, Bucar T (2006) J Radioanal Nucl Chem 269:311–316CrossRefGoogle Scholar
  3. 3.
    Bode P, Blaauw M, Obrusnik I (1992) J Radioanal Nucl Chem 157:301–312CrossRefGoogle Scholar
  4. 4.
    Kučera, J Bode P, Stvpánek V (1994) J Radioanal Nucl Chem 245:115–112Google Scholar
  5. 5.
    Greenberg RR, Bode P, De Nadai Fernandes EA (2011) Spectrochim Acta Part B 66:193–241CrossRefGoogle Scholar
  6. 6.
    Vieira B, Landsberger S, Carmo Freitas MC (2006) J Radioanal Nucl Chem 270:47–53CrossRefGoogle Scholar
  7. 7.
    Dasgupta-Schubert N, Barrera MG, Alvarado CJ, Castillo OS, Zaragoza EM, Alexander S, Landsberger S, Robinson S (2011) Water Soil Air Pollut 220:37–55CrossRefGoogle Scholar
  8. 8.
    Michenaud-Rague A, Robinson S, Landsberger S (2012) J Radioanal Nucl Chem 291:237–240CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2012

Authors and Affiliations

  1. 1.Nuclear Engineering Teaching LabUniversity of Texas at AustinAustinUSA

Personalised recommendations