Study of 138La radioactive decays using LaBr3 scintillators

Autor:	Piero Quarati, Pieter Dorenbos, I. V. Khodyuk, C.W.E. van Eijk, Francesco Quarati
Rok vydání:	2012
Předmět:	Physics Nuclear and High Energy Physics Scintillation Radionuclide Spectrometer Physics::Instrumentation and Detectors Electron capture Screening effect chemistry.chemical_element Scintillator Nuclear physics chemistry Scintillation counter Lanthanum Instrumentation
Zdroj:	Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 683:46-52
ISSN:	0168-9002
DOI:	10.1016/j.nima.2012.04.066
Popis:	We present a detailed investigation of the intrinsic activity of LaBr3 scintillators from the natural abundance of radioactive isotope 138La. Compared to earlier studies of lanthanum halides intrinsic activity, we gained a sharper insight by using samples of different sizes, ranging from 0.16 cm3 to 347 cm3, and by applying in our recent analysis results on the non-proportionality of scintillation response. In addition, we took advantage of the fact that LaBr3 spectrometers offer a unique opportunity, never available before, to study the characteristics of the 138La electron capture and β radioactive decays that are 2nd order unique forbidden transitions. The observed shape of the β continuum, measured down to the energy of 2 keV, is found to be different than expected from standard nuclear theory, indicating a possible underestimation of the screening effect for β energies below 75 keV.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1190393db939a9932bf5e6fb99cfb9fe https://doi.org/10.1016/j.nima.2012.04.066 Zobrazit plný text záznamu Full Text from ScienceDirect