STP1001

    Nuclear Data for the Use of Niobium as Neutron Fluence Monitor

    Published: Jan 1989


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    Abstract

    The 93Nb(n,ń)93Nbm reaction is frequently used for neutron fluence determination in nuclear reactors. The suitability of the niobium monitor depends very much on knowledge of the reaction cross section and the decay data of the generated isomer state 93Nbm. Results of recent developments at various institutes concerning these data are reviewed.

    The reaction cross section averaged over the 252Cf fission neutron spectrum has been remeasured, resulting in a value of (145 ± 5) mb. This is compared with values measured in the NBSR 235U standard fission neutron field and with results from other experiments.

    Keywords:

    nuclear decay data, niobium-93m, neutron fluence monitor, half-life, activation cross section, spectrum-averaged cross section, californium neutron source, fission neutron spectra (, 252, Cf, , 235, U), X-ray measurement, activity


    Author Information:

    Alberts, WG
    Physikalisch-Technische Bundesanstalt, Braunschweig,

    Schötzig, U
    Physikalisch-Technische Bundesanstalt, Braunschweig,

    Siegert, H
    Physikalisch-Technische Bundesanstalt, Braunschweig,


    Paper ID: STP10079S

    Committee/Subcommittee: E10.05

    DOI: 10.1520/STP10079S


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