Low-background-betaspectroscopy of the 4th forbidden beta transion of 115In

Datum

25.10.2012

Zeit

16:40 - 17:40

Sprecher

R. Stasch

Zugehörigkeit

TU Dresden

Serie

IKTP Institutsseminar

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Beschreibung

For this work a low-background vacuum chamber for the measurement of low activity sources was designed and built. The goal of this experiment is the measurement of the betaspectrum of 115In and the determination of the shape factor of 4th forbidden non-unique transitions. Due to the excellent resolution of modern semiconductor detectors and their low susceptibility to interference, they are the detectors of choice. Due to the long half-life of 115In with 4.41∙1014y, their exist special demands on the source and chamber design. This work examines the influences of the source, the detectors and the chamber to a measured spectrum by using Monte-Carlo-simulations and propose solutions for diverse, in the spectroscopy occurring problems. The constructed chamber and its components are presented and discussed. After that a proposal for the reconstruction of the real spectrum from the measured one and the determination of response functions of monoenergetic electrons will be given. Finally, measurements made previously are discussed and an outlook of the experiment is presented.

Letztmalig verändert: 24.10.2012, 16:03:14