Measurement of 14n (n, t)12C Reaction Cross Section in the Energy Range of 5.0 to 10.6 MeV

A. Suhaimi, R. WÖlfle, S. M. Qaim, P. W. Warwick, G. StÖcklin

Research output: Contribution to journalArticle

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Abstract

Cross sections were measured for the reaction 14N(n, t) 12C using tritium counting. A deuterium gas target at a compact cyclotron was used as a quasi-monoenergetic neutron source via the reaction 2H (d, n)3 He. Tritium was separated from the irradiated AIN target material by vacuum extraction and measured in the gas phase using anticoincidence proportional counting. 14C formed via the competing reaction channel 14N(n, p)14C was removed from tritium by permeating the gas through a Pd window or by absorption of the gaseous activity in Nb metal followed by high-temperature desorption of HT. The residual tritium content in the AIN sample was determined by dissolution in molten B2O3. The Li impurity in the AIN sample was determined via neutron activation analysis as well as optical emission spectroscopy. Tritium formation from the Li impurity was estimated to be 0.05%. The 14N (n, t)12C reaction cross sections in the neutron energy range of 5.0 to 10.6 MeV lie between 11 and 30 mb and have an uncertainty of 14 to 21%. The excitation function shows fluctuation over the whole investigated energy range; it may be attributed to the decay properties of the excited nuclear levels involved.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalRadiochimica Acta
Volume43
Issue number3
DOIs
Publication statusPublished - 1988
Externally publishedYes

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Tritium
tritium
cross sections
Gases
counting
energy
Impurities
permeating
impurities
Optical emission spectroscopy
neutron activation analysis
Neutron activation analysis
Deuterium
Neutron sources
Cyclotrons
optical emission spectroscopy
neutron sources
gases
cyclotrons
Molten materials

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Measurement of 14n (n, t)12C Reaction Cross Section in the Energy Range of 5.0 to 10.6 MeV. / Suhaimi, A.; WÖlfle, R.; Qaim, S. M.; Warwick, P. W.; StÖcklin, G.

In: Radiochimica Acta, Vol. 43, No. 3, 1988, p. 133-138.

Research output: Contribution to journalArticle

Suhaimi, A, WÖlfle, R, Qaim, SM, Warwick, PW & StÖcklin, G 1988, 'Measurement of 14n (n, t)12C Reaction Cross Section in the Energy Range of 5.0 to 10.6 MeV', Radiochimica Acta, vol. 43, no. 3, pp. 133-138. https://doi.org/10.1524/ract.1988.43.3.133
Suhaimi, A. ; WÖlfle, R. ; Qaim, S. M. ; Warwick, P. W. ; StÖcklin, G. / Measurement of 14n (n, t)12C Reaction Cross Section in the Energy Range of 5.0 to 10.6 MeV. In: Radiochimica Acta. 1988 ; Vol. 43, No. 3. pp. 133-138.
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AB - Cross sections were measured for the reaction 14N(n, t) 12C using tritium counting. A deuterium gas target at a compact cyclotron was used as a quasi-monoenergetic neutron source via the reaction 2H (d, n)3 He. Tritium was separated from the irradiated AIN target material by vacuum extraction and measured in the gas phase using anticoincidence proportional counting. 14C formed via the competing reaction channel 14N(n, p)14C was removed from tritium by permeating the gas through a Pd window or by absorption of the gaseous activity in Nb metal followed by high-temperature desorption of HT. The residual tritium content in the AIN sample was determined by dissolution in molten B2O3. The Li impurity in the AIN sample was determined via neutron activation analysis as well as optical emission spectroscopy. Tritium formation from the Li impurity was estimated to be 0.05%. The 14N (n, t)12C reaction cross sections in the neutron energy range of 5.0 to 10.6 MeV lie between 11 and 30 mb and have an uncertainty of 14 to 21%. The excitation function shows fluctuation over the whole investigated energy range; it may be attributed to the decay properties of the excited nuclear levels involved.

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