K J Ellis 1990 Phys. Med. Biol. 35 1079 doi:10.1088/0031-9155/35/8/004
K J Ellis
Show affiliationsA broad-beam 238Pu/Be neutron irradiator has been previously developed for exclusive use in in vivo neutron activation analysis in humans. The initial calibrations of the facility provided only a fixed value for the thermal neutron flux. Adjustment of this flux value for decay of the neutron source was later introduced and was based on the physical half-life of 238Pu. The current findings would suggest, however, that a more appropriate value for the effective half-life for the total body irradiator is 141.7+or-2.5 y. In addition, variations in the induced counts for a Mn standard on a yearly basis indicate that seasonal differences of approximately 0.5% can be present between the winter and summer months.
87.80.-y Biophysical techniques (research methods)
87.53.-j Effects of ionizing radiation on biological systems
82.80.Jp Activation analysis and other radiochemical methods
Issue 8 (August 1990)
K J Ellis 1990 Phys. Med. Biol. 35 1079
S Kučas et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 1711
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