An alanine-boron compound for thermal neutron fluence measurements. Part 2: EPR response

In a previous paper the synthesis in three different media (acidic, neutral and alkaline) of an alanine-boron compound to be used for thermal neutron fluence measurements was reported. The present work studies the electron pa ramagnetic resonance (EPR) signal response of the three preparations to the rmal neutron irradiation (phi = 5 x 10(7) n/cm(2)s). The following EPR sign al parameters of the samples were investigated: peak-to-peak signal intensi ty vs, thermal neutron fluence Phi = phi Delta t; where Delta t = 1, 5, 10, 20, 40, 60, 80, 90, 100, 110 and 120 h, peak-to-peak signal intensity vs. microwave power, signal fading, repeatability, batch homogeneity and zero d ose response. It is concluded that these new products could be used in ther mal neutron fluence estimations, (C) 1999 Elsevier Science Ltd. All rights reserved.