Particle emission angle determination in Frisch grid ionization chambers by electron drift-time measurements

• The double kinetic energy measurement of fission fragments with a double-sided Frisch grid ionization chamber allows a careful determination of the emission angle, which is essential in order to apply appropriate energy-loss corrections. We present a drift-time method, which uses the time that free electrons need to drift from the location of their creation, e.g. by a fission fragment in the counting gas, to the grid, before inducing a signal on the anode. Such a measurement leaves energy and angular information fully decoupled. We demonstrate the applicability of the drift-time method for the example of the 234,238U (γ,f) reactions performed at the superconducting Darmstadt electron linear accelerator. The angular resolutions achieved with this method are comparable to those obtained with other methods.

Subject headings

NATURVETENSKAP  -- Fysik -- Acceleratorfysik och instrumentering (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Accelerator Physics and Instrumentation (hsv//eng)

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

NATURVETENSKAP  -- Fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

Angular distribution

Drift-time method

Fission fragment

Frisch grid ionization chamber

NUCLEAR REACTIONS: 234

238U (γ

f)

Photon-induced fission

Angular resolution

Electron drift

Electron linear accelerator

Emission angle

Energy measurements

Free electron

Frisch grids

Nuclear reactions

Particle emissions

Fission reactions

Ionization chambers

Nuclear energy

Nuclear reactors

Particle detectors

Photons

Time measurement

Ionization of gases

Physics

Physics

Publication and Content Type

ref (subject category)

art (subject category)