Reduction of the pulse duration from a Febetron 707

Abstract

This paper describes the use of a deflecting magnetic field to reduce the duration of an electron pulse from a Febetron 707 (normally 90 nsec at the base, Imax=4000 A) to 12 nsec (6–7 nsec half-width) with Imax =450 A. Under these conditions a dose of about 300 kilorad is delivered in a circular area 2 cm in diameter.

Reactivity of the “capto‐dative” methylmethoxyacetate (MMA) toward radicals, studied by electron pulse radiolysis in neutral aqueous medium

“…Irradiation has been made by a Febetron 707 ("Field Emission Corp.") pulse irradiator in CEN Saclay (France). The energy of the electrons ranging the sample is about 2 MeV and pulse duration about 10 ns (Lesigne, 1976). Spectroscopic detection system includes a Xenon arc lamp (XBO 450 W), a monochromator (UV-Vis) "ZEISS M4Qlll" and a photomultiplier "HAMATSU R905".…”

Pulse radiolysis in anhydrous hydrogen fluoride, a novel route to unusual oxidation states in fluoride media; case of thallium monofluoride

“…The experimental details have been previously described. 12 An irradiation cell has been conceived for our purposes. 13 The body (3 cm3) and the window allowing the electrons through were made of Kel-F. Sapphire optical windows were used, the optical path length being 2.5 cm.…”

Effect of ion pairing on the reactivity of solvated electrons in ethyl alcohol

“…Solvated electrons were produced by pulse radiolysis using a modified Febetron 707 delivering almost monochromatic electrons in the energy range 1.6-1.8 MeV. 3 The shape of the electron pulse is triangular and the total width is less than 20 Absorption spectra and the decay of the solvated electron were recorded using a spectrophotometric detection system. The intensity of the analyzing light from a 450-W xenon arc was increased by a factor of about 30 at 600 nm by discharging a bank of condensers through it.…”

“…(2) The position of the maximum is observed for a ratio (M2+)t/(N03')t close to 1. (3) The rate constant for reaction 2 depends, to a first approximation, not on the absolute concentration of (M2+)t but on the ratio (M2+)t/(N03")t (Table I).…”