A summation free β+-endpoint spectrometer
Creators
- 1. Gesellschaft fuer Schwerionenforschung mbH, Darmstadt (Germany, F.R.)
- 2. Forschungszentrum Juelich GmbH (Germany, F.R.). Inst. fuer Kernphysik
- 3. Paris-11 Univ., 91 - Orsay (France). Centre de Spectrometrie Nucleaire et de Spectrometrie de Masse
Description
A β+-endpoint spectrometer is described, where positrons are observed in an 11-mm thick silicon detector in coincidence with subsequent γ-rays meausred in a germanium detector, and where the summing of the positron energy with the annihilation radiation is prevented by detecting both 511-keV quanta in opposite segments of a BGO ring surrounding the silicon detector. The procedure of measuring and analyzing the data is outlined for the decay of the 11/2--isomer of 149Tb; its endpoint energy is determined to be 1853(10) keV, in agreement with the literature. The accuracy and reliability of β+-endpoint measurements is discussed in comparison to the EC/β+-ratio method. (orig.)
Availability note (English)
MF available from INIS under the Report Number.
Files
Restricted
The record is publicly accessible, but files are restricted to users with access.
Additional details
Publishing Information
- Imprint Pagination
- 25 p.
- Report number
- GSI--90-46(prepr.)
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 22004653
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ACCURACY; ANTICOINCIDENCE; BETA SPECTRA; BETA SPECTROMETERS; BETA SPECTROSCOPY; BETA-PLUS DECAY; BGO DETECTORS; BRANCHING RATIO; COINCIDENCE SPECTROMETRY; ELECTRON CAPTURE DECAY; ENERGY DEPENDENCE; ENERGY SPECTRA; EXPERIMENTAL DATA; GAMMA DETECTION; GAMMA SPECTRA; GE SEMICONDUCTOR DETECTORS; ISOMERIC NUCLEI; KEV RANGE 100-1000; LI-DRIFTED SI DETECTORS; MEV RANGE 01-10; POSITRON DETECTION; Q-VALUE; RELIABILITY; RESPONSE FUNCTIONS; ROTATIONAL STATES; SI SEMICONDUCTOR DETECTORS; SPECTRA UNFOLDING; TERBIUM 149
- Descriptors DEC
- ALPHA DECAY RADIOISOTOPES; BETA DECAY; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CHARGED PARTICLE DETECTION; COINCIDENCE METHODS; COUNTING TECHNIQUES; DATA; DATA PROCESSING; DECAY; DETECTION; ELECTRON CAPTURE RADIOISOTOPES; ENERGY; ENERGY LEVELS; ENERGY RANGE; EXCITED STATES; FUNCTIONS; HOURS LIVING RADIOISOTOPES; INFORMATION; INTERMEDIATE MASS NUCLEI; ISOTOPES; KEV RANGE; LI-DRIFTED DETECTORS; MEASURING INSTRUMENTS; MEV RANGE; MINUTES LIVING RADIOISOTOPES; NUCLEAR DECAY; NUCLEI; NUMERICAL DATA; ODD-EVEN NUCLEI; RADIATION DETECTION; RADIATION DETECTORS; RADIOISOTOPES; RARE EARTH NUCLEI; SCINTILLATION COUNTERS; SEMICONDUCTOR DETECTORS; SOLID SCINTILLATION DETECTORS; SPECTRA; SPECTROMETERS; SPECTROSCOPY; TERBIUM ISOTOPES