Abstract
An automated fast sample transfer system for the determination of measurements of short-lived isotopes has been constructed at the Research Reactor Munich FRM. Instrumental neutron activation analysis and analysis of fissile materials by delayed neutron counting are performed on this transfer device. A LabVIEW™ program on a PC with WindowsNT operating system controls the whole pneumatic system via a PCI-1200 interface and four signal conditioning SCXI-modules of National Instruments. Infrared sensors are used to monitor key points in the transfer system. The sample capsule can be automatically removed from the "rabbit" in a special switch prior to spectrum collection. γ-Spectra are acquired by a HPGe detector with the Loss-Free-Counting method of Westphal. The delayed neutrons are measured by five 3He-detectors and a multichannel scaler. The transfer time is about 200 ms. The system and its mode of operation for routine work will be described.
| Original language | English |
|---|---|
| Pages (from-to) | 470-476 |
| Number of pages | 7 |
| Journal | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume | 522 |
| Issue number | 3 |
| DOIs | |
| State | Published - 21 Apr 2004 |
Keywords
- Delayed neutron counting
- NAA
- Rabbit system
- Short time irradiation