10-16 June 2018
Dalhousie University
America/Halifax timezone
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Investigation of High-Lying (alpha,g) Resonances in 22Ne via High-Resolution Gamma Ray Spectroscopy in Inverse Kinematics (G)*

11 Jun 2018, 11:45
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) M1-5 Nuclear Astrophysics (DNP) | Astrophysique nucléaire (DPN)

Speaker

Beau Greaves (University of Guelph)

Description

In asymptotic giant branch (AGB) stars, 22Ne plays an important role in several nucleosynthesis processes, with its production competing with the synthesis of 19F through the so called ‘poisoning reaction’, and the following transfer into 25Mg acting as one of the main neutron sources for the s-process, affecting the reaction rates of numerous isotopes.

In this contribution, we present a preliminary look into a recent neutron transfer experiment done at TRIUMF in July 2017, studying the high-lying resonances of the 22Ne nucleus. Using TIGRESS, we can accurately determine these resonance energies, utilizing the precision of the HPGe detectors. Alongside this, we can use data taken simultaneously with the SHARC silicon detector to determine the spins for these resonances, and finally, apply Doppler shift attenuation method to constrain the lifetimes of resonances down to femtoseconds.

Primary author

Beau Greaves (University of Guelph)

Co-authors

Dennis Muecher (University of Guelph) Stephen Gillespie (TRIUMF)

Presentation Materials