2-7 June 2019
Simon Fraser University
America/Vancouver timezone
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Spectroscopic studies of $^{116, 118, 120}$Sn through thermal neutron induced reactions using FIPPS

Jun 3, 2019, 2:00 PM
DAC FT I (Simon Fraser University)


Simon Fraser University

Oral Competition (Undergraduate Student) / Compétition orale (Étudiant(e) du 1er cycle) Nuclear Physics / Physique nucléaire (DNP-DPN) M2-5 Nuclear Structure I (DNP) | Structure nucléaire I (DPN)


Mr Kurtis Raymond (SFU)


Studies of tin isotopes are important for understanding the structure of singly-closed shell nuclei. The $^{116,118,120}$Sn isotopes are examples of even-even singly-closed shell nuclei close to the line of stability. Using $(n_\text{th},\gamma)$ reactions provides a comprehensive study of the level scheme of a nucleus. Despite many previous studies for stable tin isotopes, many nuclear levels are missing spin and parity assignments. Experiments involving $^{116,118,120}$Sn were conducted in 2018 at ILL, Grenoble, using FIPPS (FIssion Product Prompt $\gamma$-ray Spectrometer), which uses eight highly efficient, clovered, n-type, HPGe detectors to measure low intensity gamma rays. This aids in identify previously unknown transition multipolarities, and thus, provide the spin states of ambiguous energy levels. % work on this In the study of $^{116}$Sn, sixteen ancillary LaBr$_3$ detectors were used in the experiment to provide ps timing measurements to deduce state lifetimes. The experiments involving $^{118,120}$Sn featured eight additional HPGe clovers, from IFIN-HH (Horia Hulubei National Institute of Physics and Nuclear Engineering), to further improve the array's efficiency. The high number of statistics that FIPPS provides aids in making polarization measurements and angular correlation measurements to identify the spin states of energy levels without definite properties. Study of the electromagnetic character of weak transitions in tin will establish the parity of the de-excited states, help complete the understanding of singly-closed shell nuclei, and nuclear structure as a whole. The current work being done to study the tin species will be presented.

Primary author

Mr Kurtis Raymond (SFU)


Aimee Bell (Simon Fraser University) Alain Astier (Cnrs Csnsm In2p3 Orsay) Amel Korichi (Cnrs Csnsm In2p3 Orsay) Andreas Zilges (Inst. Physics - Univ Cologne) Aurelien Blanc (Cea Bruyeres Le Chatel) Badamsambuu Jigmeddorj (University Of Guelph) Bingfeng Lv (Cnrs Csnsm Spectro Nucl De Masse Orsay) Bo Cederwall (Phys Dept Royal Institute Of Technology Stockholm) C. Andreoiu (Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada) Caterina Michelagnoli (ILL) Costel Petrache (University Paris Sud) Daphney Bucher (Ithemba Labs Faure) Erin Mcgee (Dept Physics University Of Guelph) Etienne Dupont (Cnrs Csnsm Spectro Nucl De Masse Orsay) Fatima Garcia (Simon Fraser University) Isaiah Djianto (Simon Fraser University) Jakub Wisniewski (University Of Warsaw, Faculty Of Physics) Jeffrey Vanhoy (United States Naval Academy Annapolis) Kenneth Whitmore (Simon Fraser University) Kevin Ortner Mark Spieker (Sans Employeur Grenoble) Paolo Mutti (ILL) Paul Garrett (Dept Physics University Of Guelph) Radomira Lozeva (Cnrs Csnsm In2p3 Orsay) Sally Valbuena (University Of Guelph) Sarah Prill (University Of Cologne) Steven Yates (University Of Kentucky) Ulli Koester (ILL) Waldemar Urban (University Of Warsaw, Faculty Of Physics) Yung Hee Kim (ILL)

Presentation materials