SYMPOSIA PAPER Published: 01 January 2001
STP13598S

Dosimetry of a GeV Proton-Driven Spallation Neutron Field by the Activation Method

Source

In order to meet the requirement from the high energy neutron dosimetry application, we have examined potential reactions for the neutron activation detector at spallation neutron fields, which were provided by driving protons with energies of 1.6, 12 and 24 GeV into a mercury target. The experiments were carried out using AGS accelerator at Brookhaven National Laboratory. Metal foils of In, Nb, Al, Co, Ni, Ti, Y and Bi were selected as dosimeters. Thirty-one reactions with threshold energies between 0.3 and 60 MeV were identified. Foils were irradiated at different locations around the mercury target. After the irradiation gamma-ray from the activation foils were measured with HPGe detectors. Using the 115In(n,n’)115mIn reaction with the threshold energy of 0.3 MeV, the spatial distribution of the neutron flux around the spallation target was obtained, and the neutron spectrum was determined by means of multiple-foil activation unfolding method.

Author Information

Kasugai, Y
Center of Neutron Science, Japan Atomic Energy Research Institute, Ibaraki-ken, Japan
Takada, H
Center of Neutron Science, Japan Atomic Energy Research Institute, Ibaraki-ken, Japan
Ikeda, Y
Center of Neutron Science, Japan Atomic Energy Research Institute, Ibaraki-ken, Japan
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Details
Developed by Committee: E10
Pages: 207–214
DOI: 10.1520/STP13598S
ISBN-EB: 978-0-8031-5450-6
ISBN-13: 978-0-8031-2884-2