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

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Garrett, PE, Bernier, N, Dunlop, R, MacLean, AD, Bildstein, V, Dillmann, I, Jungclaus, A, Svensson, CE, Andreoiu, C, Ball, GC et al (show 35 more authors) , Bidaman, H, Boubel, P, Burbadge, C, Caballero-Folch, R, Dunlop, MR, Evitts, LJ, Garcia, F, Garnsworthy, AB, Hackman, G, Hallam, S, Henderson, J, Ilyushkin, S, Kisliuk, D, Krucken, R, Lassen, J, Li, R, MacConnachie, E, Mcgee, E, Moukaddam, M, Olaizola, B, Ortner, K, Padilla-Rodal, E, Park, J, Paetkau, O, Petrache, CM, Pore, JL, Radich, AJ, Ruotsalainen, P, Smallcombe, J, Smith, JK, Tabor, SL, Teigelhofer, A, Turko, J, Whitmore, K and Zidar, T (2018) Advances at TRIUMF-ISAC and decay of neutron-rich Cd studied with GRIFFIN. .

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Abstract

<jats:p>The <jats:italic>β</jats:italic>-decay half lives of nuclei near the <jats:italic>r</jats:italic>-process path are critical information required for abundance calculations, especially those near neutron number <jats:italic>N</jats:italic> = 82. Specifically, the nuclei below doubly-magic <jats:sup>132</jats:sup>Sn are key, and play an important role in the formation and shape of the second <jats:italic>r</jats:italic>-process abundance peak. The half lives in this region are challenging to measure due to the significant <jats:italic>β</jats:italic>-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 <jats:sup>128-130</jats:sup>Cd is outlined and the results given, and some examples of the power of GRIFFIN to expand decay schemes, specifically for the decay of <jats:sup>128</jats:sup>Cd to <jats:sup>128</jats:sup>In, are given.</jats:p>

Item Type:	Conference or Workshop Item (Unspecified)
Depositing User:	Symplectic Admin
Date Deposited:	06 Feb 2019 13:52
Last Modified:	19 Jan 2023 01:05
DOI:	10.1051/epjconf/201819304011
Open Access URL:	https://doi.org/10.1051/epjconf/201819304011
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3032379