136 



ammonia, 34 



water, 34 

 Dipolar relaxation 



thermal electrons, 30 

 Dipolar structure 



interaction with slow electrons 



in water, 23, 26 

 Dipole-dipole interaction 



resonative energy transfer, 87 

 Dissociative attachment, 29 

 Dosage and dosage units 



determined by stopping power 



of gases, 101 



measurement, 101 

 Double coil structure 



of nucleic acid determined by 



X irradiation, 117 



Elastic scattering 



induced by slow electrons in 

 water, 23, 26 



Electron capture 



low energy inactivation of bio- 

 logical material, 8 



Electron trapping 



in glass solvents, 45 



in carotenoid solvents, 45 



Electron volts 



cross section, 8 



effect on bovine serum, 7 



Electronic excitation 

 bond rupture, 7 9 

 changes in vibrational levels 

 of molecules, 77 

 energy requirements, 91, 92 

 induced by chemiluminescent 

 reactions, 16 

 influenced by positive ion 

 field, 27 



internal conversion of energy 

 to heat, 76 



of scintillating solution, 14 

 processes in complex mole- 

 cules, 107 



triplet state of energy in un- 

 saturated molecules, 116 



Electrons 



bombardment of bacterial 



spores and bacterial viruses 



and viruses, 6 



degradation of kinetic energy, 



22 



effects of excitation on energy 



degradation and chemical 



change, 7 5 



electronic field replaced by 



photons, 26 



energies in electrical dis- 

 charge, 10 



energy for recapture in ion- 

 ized water, 55 



fate in ionized water, 51, 69 

 high energy, 2 

 measurement of distance 

 traveled in ionized water, 52 

 measurement of energy loss, 

 93 



measurement of track, 28 

 mobility, 25 



orbital capture and loss by 

 helium and hydrogen ions, 2 

 preferential, initial and general 

 recombinations with positive 

 ions, 70 

 recapture, 73 

 role of excitation in radio- 

 biology, 75 



scattering and capture, 53 

 stopping power, 1 

 time to moderate excitation 

 to thermal energy, 27 



Electronic kinetic energy 



degradation to thermal energy, 

 22 



Electronic state 



surface of complex molecules, 

 96 



Energy 



by predissociation, 77 

 degradation induced by electron- 

 ic excitation, 75 

 for electron recapture, 55 

 formation of radical pairs in 

 water, 68 



loss by hydrogen ions in gas at 

 low pressure, 3 

 mechanisms of degradation 

 and chemical change in water, 

 51 



non-Maxwellian distribution in 

 electrical discharge, 10 

 penetration of low level parti- 

 cles, 3 



radiationless transitions by 

 internal conversion, 76 

 threshold for radiobiological 

 effect, 13 



transfer from fast particles to 

 matter, 1 



transfer from secondary elec- 

 trons to matter, 22 

 yields for light production in 

 gamma or beta irradiated 

 anthracene crystals, 84 



Energy distribution 



