10-16 June 2018
Dalhousie University
America/Halifax timezone
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Decay Spectroscopy of Neutron-Rich Cd Around the N = 82 Shell Closure (G)*

11 Jun 2018, 14:15
15m
SUB 302 (cap.40) (Dalhousie University)

SUB 302 (cap.40)

Dalhousie University

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Nuclear Physics / Physique nucléaire (DNP-DPN) M2-5 Nuclear Structure I (DNP) | Structure nucléaire (DPN)

Speaker

Nikita Bernier (TRIUMF)

Description

The neutron-rich Cadmium isotopes around the well-known magic numbers at $Z=50$ and $N=82$ are prime candidates to study the evolving shell structure observed in exotic nuclei. Additionally, the extra binding energy observed around the nearby doubly-magic $^{132}$Sn has direct correlations in astrophysical models, leading to the second r-process abundance peak at $A\approx130$ and the corresponding waiting-point nuclei around $N=82$. The $\beta$-decay of the $N=82$ isotope $^{130}$Cd into $^{130}$In was first studied a decade ago [1], but the information for states of the lighter indium isotope ($^{128}$In) is still limited. Detailed $\beta\gamma$-spectroscopy of $^{128}$Cd was accomplished using the GRIFFIN [2] facility at TRIUMF, which is capable of performing spectroscopy down to rates of 0.1 pps.

The ongoing analysis of the $^{128,131,132}$Cd will be presented. Already in
$^{128}$Cd, 28 new transitions and 11 new states have been observed in addition to the 4 previously observed excited states [3]. These new results are compared with recent Shell Model calculations. For $^{131}$Cd, results will be compared with the recent EURICA data. These data highlight the unique capabilities of GRIFFIN for decay spectroscopy on the most exotic, short-lived isotopes, and the necessity to re-investigate even "well-known" decay schemes for missing transitions.

[1] I. Dillmann $et \ al.$, Phys. Rev. Let. 91, 162503 (2003)

[2] C.E. Svensson and A.B. Garnsworthy, Hyperfine Int. 225, 127 (2014)

[3] B. Fogelberg, Proc. Intern. Conf. Nuclear Data for Science and Technology, Mito, Japan, p.837 (1988)

Primary authors

Co-authors

Corina Andreoiu (Simon Fraser University) Gordon Ball (TRIUMF) Harris Bidaman (University of Guelph) V. Bildstein (University of Guelph) Michelle Dunlop (University of Guelph) Ryan Dunlop (University of Guelph) Lee Evitts (TRIUMF) Fatima Garcia (Simon Fraser University) Adam Garnsworthy (TRIUMF) Greg Hackman (TRIUMF) Andrea Jungclaus (Consejo Superior de Investigaciones Cientificas (CSIC) (ES)) Dylan Perry Kisliuk (University of Toronto (CA)) Jens Lassen (TRIUMF) Andrew MacLean (University of Guelph) Mohamad Moukaddam (TRIUMF) Bruno Olaizola Mampaso (University of Guelph (CA)) Jason Park (University of British Columbia/TRIUMF) Costel Petrache (University Paris Sud) Jennifer Pore Allison Radich (university of Guelph) james smallcombe Jenna Smith (TRIUMF) Carl Svensson (University of Guelph) Ms Andrea Teigelhoefer (TRIUMF) Joseph Turko (University of Guelph) Tammy Zidar (University of Guelph)

Presentation Materials