Application of the Broad Energy Germanium detector: A technique for elucidating beta-decay schemes which involve daughter nuclei with very low energy excited states

作者：Venhart M^*; Wood J L; Boston A J; Cocolios T E; Harkness Brennan L J; Herzberg R D; Joss D T; Judson D S; Kliman J; Matousek V; Motycak S; Page R D; Patel A; Petrik K; Sedlak M; Veselsky M

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2017, 849: 112-118.

DOI：10.1016/j.nima.2016.12.048

• Broad Energy Germanium detector
• gamma-Ray spectroscopy
• Level scheme

A technique for elucidating beta-decay schemes of isotopes with a large density of states at low excitation energy has been developed, in which a Broad Energy Germanium (BEGe) detector is used in conjunction with coaxial hyper-pure germanium detectors. The power of this technique is demonstrated using the example of Hg-183 decay. Mass-separated samples of Hg-183 were produced by a deposition of the low-energy radioactive-ion beam delivered by the ISOLDE facility at CERN. The excellent energy resolution of the BEGe detector allowed gamma-ray energies to be determined with a precision of a few tens of eV, which was sufficient for the analysis of the Rydberg-Ritz combinations (in conjunction with gamma-gamma coincidences) in the level scheme. The timestamped structure of the data was used for unambiguous separation of gamma rays arising from the decay of Hg-183 from those due to the daughter decays.

• 出版日期2017-3-21