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.