Advances at TRIUMF-ISAC and decay of neutron-rich Cd studied with GRIFFIN

Autor:	R. Dunlop, T. Zidar, N. Bernier, J. Lassen, Ruohong Li, C. Burbadge, B. Olaizola, Corina Andreoiu, A. J. Radich, Joochun Park, S. Hallam, G. Hackman, P. E. Garrett, C. M. Petrache, Elizabeth Padilla-Rodal, Jack Henderson, A. Jungclaus, F. H. Garcia, M. Moukaddam, P. Boubel, H. Bidaman, G. C. Ball, J. K. Smith, E. McGee, A. Teigelhöfer, A. B. Garnsworthy, K. Whitmore, E. MacConnachie, R. Krücken, Panu Ruotsalainen, Iris Dillmann, James Smallcombe, J. L. Pore, R. Caballero-Folch, Samuel Tabor, L. J. Evitts, J. Turko, O. Paetkau, S. V. Ilyushkin, M. R. Dunlop, C. E. Svensson, A. D. MacLean, K. Ortner, D. Kisliuk, V. Bildstein
Rok vydání:	2018
Předmět:	Physics education.field_of_study Spectrometer Isotope 010308 nuclear & particles physics QC1-999 Population Time distribution 01 natural sciences Nuclear physics Quality (physics) Neutron number 0103 physical sciences Neutron 010306 general physics education Delayed neutron
Zdroj:	EPJ Web of Conferences, Vol 193, p 04011 (2018)
ISSN:	2100-014X
DOI:	10.1051/epjconf/201819304011
Popis:	The β-decay half lives of nuclei near the r-process path are critical information required for abundance calculations, especially those near neutron number N = 82. Specifically, the nuclei below doubly-magic 132Sn are key, and play an important role in the formation and shape of the second r-process abundance peak. The half lives in this region are challenging to measure due to the significant β-delayed neutron decay branches and the population of isomeric states with half lives comparable to the ground states. However, by measuring the time distribution of γ rays, these complications can be eliminated. This requires, however, a very effcient γ-ray spectrometer since the production of isotopes in this region is very limited. The new GRIFFIN array at TRIUMF-ISAC provides the high effciency required for these measurements. Recent improvements in the quality of the beams produced at TRIUMF, employing the IG-LIS device, are outlined, as well as the current status of the ARIEL facility. The GRIFFIN spectrometer and its use are briefly described. The experiment to measure the half lives of 128-130Cd is outlined and the results given, and some examples of the power of GRIFFIN to expand decay schemes, specifically for the decay of 128Cd to 128In, are given.
Databáze:	OpenAIRE
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