The LaBr3:Ce scintillator offers the unique opportunity to study the β- radioactive decay of 138La, that is a 2nd order unique forbidden transition. The 138La isotope is one of the rarest isotopes on earth (it is present as 0.09% in natural Lanthanum) and because of its extremely long lifetime, of the order of 1011 years, large amounts of 138La are needed for the measurement of the β- decay spectrum. In literature, only one experimental measurement is present and the results are not reproduced by the standard nuclear theory. A second measurement of the β- continuum is presented in this work. For this measurement, two LaBr3:Ce scintillators (3″ × 3″) and two different experimental techniques were used. The shape of the β- continuum spectrum, measured down to the energy of 2-3 keV, is found to be identical to the one previously measured and published. On the other side, it is different from the theoretical published spectrum in particular below 75 keV.
Measurement of β - decay continuum spectrum of 138La / A. Giaz, G. Gosta, F. Camera, S. Riboldi, N. Blasi, A. Bracco, S. Brambilla, B. Million - In: Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2014 IEEE[s.l] : IEEE, 2016 Mar 10. - ISBN 9781479960972. - pp. 1-4 (( convegno IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC tenutosi a Seattle nel 2014.
|Titolo:||Measurement of β - decay continuum spectrum of 138La|
GIAZ, AGNESE (Primo)
|Parole Chiave:||Nuclear and High Energy Physics; Radiology, Nuclear Medicine and Imaging|
|Settore Scientifico Disciplinare:||Settore FIS/01 - Fisica Sperimentale|
Settore FIS/04 - Fisica Nucleare e Subnucleare
Settore ING-INF/01 - Elettronica
|Data di pubblicazione:||10-mar-2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1109/NSSMIC.2014.7431201|
|Tipologia:||Book Part (author)|
|Appare nelle tipologie:||03 - Contributo in volume|