-
Mallory Loria (University of Victoria/TRIUMF), Stephanie Ciccone (University of Guelph)2024-05-01, 9:00 a.m.
-
Falk Herwig (University of Victoria)2024-05-01, 9:20 a.m.
The Canadian Nuclear Physics for Astrophysics Network is bringing together the multiple disciplines needed to investigate the origin of the elements. The emphasis is on nuclear physics experiments and theory for astrophysics applications. For example, CaNPAN tries to investigate, as new astrophysics scenarios are developed in response to astronomical observations, what is the impact of nuclear...
Go to contribution page -
Amanda Edwin (Saint Mary's University)2024-05-01, 10:00 a.m.
One of the reactions that has an observable effect on classical nova nucleosynthesis is the proton capture on radioactive 23Mg, resulting in 24Al plus a γ. The 23Mg(p, γ)24Al has been investigated through a variety of experimental and theoretical means in the past. These investigations include a direct measurement of the strength and energy of the dominant resonance in this reaction, using a...
Go to contribution page -
Maeve Cockshutt (University of Victoria)2024-05-01, 10:20 a.m.
Current stellar nucleosynthesis models fail to reproduce the measured
Go to contribution page
isotopic abundances in group 2 oxygen-rich presolar grains, which are
characterized by large 18O depletions. It was proposed that cool bottom
processing in low-mass AGB stars is responsible for the observed isotopic
abundances. We modeled cool-bottom processing during the RGB and the
AGB of 1.2M⊙ stars to predict... -
Manraj Shergill (McMaster University)2024-05-01, 11:00 a.m.
This research investigates the 38K(p,γ) 39Ca reaction rate, a crucial process in classical novae nucleosynthesis. Classical novae, characterized by sudden brightness surges followed by fading, result from explosive hydrogen-rich material ignition on white dwarf stars. Notable discrepancies between observed and predicted abundances of Ca and Ar in nova ejecta underscore the necessity of...
Go to contribution page -
Maude Larivière (UBC / TRIUMF)2024-05-01, 11:20 a.m.
Understanding the formation of the heaviest elements has long been a pivotal inquiry and recent progress spurred by LIGO's detection of gravitational waves now lead us to examine kilonovae as crucial markers in unraveling the processes behind the synthesis of those elements. Notably, the emission spectra of MeV gamma rays could lead to strong insight in the identification of individual...
Go to contribution page -
Chris Ruiz (TRIUMF), Falk Herwig (University of Victoria), Iris Dillmann (TRIUMF), Liliana Caballero (University of Guelph), Pavel Denissenkov (University of Victoria)2024-05-01, 1:00 p.m.
A panel to ask our CaNPAN experts any curious question about research, scientific writing, careers in this field, the academic community, and more!
Go to contribution page -
Mallory Loria (University of Victoria/TRIUMF)2024-05-01, 2:30 p.m.
Our framework, developed through the Canadian Nuclear Physics for Astrophysics Network (CaNPAN), is crucial for guiding nuclear astrophysics experiments. It has the capacity to identify key nuclear reactions responsible for element synthesis in various astrophysical phenomena. Notably, this framework has identified the 39K(p, 𝛾)40Ca and 38K(p, 𝛾)39Ca reactions as the most impactful for the...
Go to contribution page -
Stephanie Ciccone (University of Guelph)2024-05-01, 3:00 p.m.
Neutron star mergers are an ideal environment for rapid (r-process) neutron captures to take place that lead to the production of neutron-rich nuclei far from the valley of stability. This is one encouraging site to investigate for where abundances of the heaviest elements in our Solar System and beyond are thought to have come from. We explored the r-process regime in mergers through the...
Go to contribution page -
2024-05-01, 4:00 p.m.
-
Chris Ruiz (TRIUMF)2024-05-02, 9:00 a.m.
An overview of experimental nuclear physics facilities at ISAC. Aimed at the CaNPAN students, I'll provide a brief intro to the subject of measurement of nuclear observables relevant to astrophysics, before a virtual tour of the ISAC facilities and how they enable these measurements with exotic radioactive beams from the ISAC facility. In the afternoon, attendees will get to see the facilities...
Go to contribution page -
Annika Lennarz (TRIUMF)2024-05-02, 9:30 a.m.
"In explosive astrophysical environments, such as novae, supernovae and neutron star mergers, a significant fraction of atomic nuclei are expected to exist in excited quantum states. These elevated levels participate in nucleosynthesis much in the same way as nuclear ground states and, as such, play an essential role in determining the abundance of chemical elements in our Galaxy.
In this...
Go to contribution page -
Cameron Angus (TRIUMF)2024-05-02, 9:50 a.m.
The r-process is responsible for half of all heavier-than-iron elements in the universe today.
Go to contribution page
However, while models have been able to reproduce the abundance distributions of the
heaviest elements observed in ultra-metal poor stars, intermediate-mass elements (36 < Z < 47) have been observed to be more abundant than expected from model predictions. The weak r-process in early core-collapse... -
Ben Reed (TRIUMF/SMU)2024-05-02, 10:10 a.m.
Almost half of the elements heavier than iron are believed to be produced in the r-process. It is now understood that one r-process sight is neutron star mergers. However, observations suggest the r-process must be occurring in addition sights. One possibility is core-collapse supernovae, which are predicted to be driven by the weak r-process, in which heavy elements are produced by a series...
Go to contribution page -
Alan Chen (McMaster)2024-05-02, 11:00 a.m.
The nu-p process has been proposed to happen in the neutrino-driven winds of core-collapse supernovae, and its nucleosynthesis may help explain the origin of several p-process elements. This nucleosynthesis has been shown in reaction sensitivity studies to be affected by the 7Be(alpha, gamma)11C reaction rate. This presentation will discuss a measurement of 7Be(alpha, gamma) resonance...
Go to contribution page -
Dr Louis Wagner (TRIUMF)2024-05-02, 11:20 a.m.
Nuclear reactions play a pivotal role in the understanding of astrophysical phenomena, providing key insights into the processes occurring within stars, supernovae, and other celestial bodies. Especially experiments with radioactive isotope beams (RIB) in inverse kinematics are a vital tool to get direct information on cross-sections of astrophysical important nuclear reactions with quickly...
Go to contribution page -
Guy Leckenby (TRIUMF)2024-05-02, 11:40 a.m.
Lead-205 initially looks like a very promising candidate to be used as a chronometer for the early Solar System due to its unique position among astrophysically short-lived radionuclides as an s-only isotope probing the termination of the s process [1]. Unfortunately, the 2.3 keV 1/2− first excited state in 205Pb reduces the half-life in stellar environments by around 6 orders of magnitude,...
Go to contribution page -
Reifarth Rene (LANL)2024-05-02, 1:00 p.m.
Virtually all of the isotopes heavier than iron would not exist without neutron-induced reactions. Despite there importance in many different astrophysical scenarios, there are almost no direct measurements for isotopes with half-lives shorter than a few years. A radically new approach is necessary to overcome this constraint.
Ion storage rings offer unprecedented possibilities to...
Go to contribution page -
2024-05-02, 1:20 p.m.
Open time for discussion
Go to contribution page -
Falk Herwig (University of Victoria)2024-05-03, 9:00 a.m.
-
Rebecca Surman (University of Notre Dame)2024-05-03, 9:15 a.m.
Our understanding of the formation of the heaviest elements via rapid neutron capture (r-process) nucleosynthesis is built up through the detection and analysis of a variety of astrophysical observables: isotopic and elemental abundance patterns, electromagnetic signatures, and radioisotopes. The interpretation of each type of observable is complicated by the unknown nuclear physics of the...
Go to contribution page -
Nicole Vassh (TRIUMF)2024-05-03, 9:55 a.m.
Fingerprints of the properties of exotic nuclei on nucleosynthesis observables have been used for decades to frame our picture of how the heaviest elements in our Solar System came to be. The abundance of elements in our Sun, as well as nearby metal-poor stars, hints at multiple neutron capture nucleosynthesis processes, the slow (s), intermediate (i) and rapid (r) neutron capture processes....
Go to contribution page -
Liliana Caballero Suarez (University of Guelph)2024-05-03, 10:20 a.m.
Neutron stars, accreting matter from a companion, contribute to the inventory of systems that can be explored through multimessenger astronomy. As the accreted matter interacts with ions in the neutron star atmosphere and crust, it triggers nuclear reactions, generating X-rays, p-nuclei, and potentially gravitational wave emissions. Gravity draws the newly synthesized nuclei into deeper layers...
Go to contribution page -
Pavel Denissenkov (University of Victoria)2024-05-03, 11:15 a.m.
Multiple signatures of nucleosynthesis in asymptotic giant branch stars, classical novae, and supernovae have been revealed by analyzing CNO, Al, S, Ca, Ti, Ba, and other isotopic abundance ratios in presolar dust grains. I will show that in some grains the measured Zr, Mo, and Ru isotopic ratios can be interpreted as possible signatures of i-process nucleosynthesis.
Go to contribution page -
Rodrigo Fernandez (University of Alberta)2024-05-03, 11:40 a.m.
The coalescence of neutron stars, either among themselves or with black holes, generates significant gravitational and electromagnetic waves, and is a key site for r-process element production. The ejection of mass during and after these mergers shapes the heavy element yield and electromagnetic signal, involving a complex interplay of processes and dependencies. This talk will provide an...
Go to contribution page -
Jess McIver (UBC)2024-05-03, 1:30 p.m.
In the last six years, the field of gravitational wave astrophysics has grown from a groundbreaking first discovery to revealing new populations of black holes and neutron stars through distant cosmic collisions, which has provided new insights into extreme spacetime curvatures, cosmology, and ultra-dense matter as well as the origin of heavy elements. I'll give an overview of the current...
Go to contribution page -
Phil Landry (CITA)2024-05-03, 1:55 p.m.
Multimessenger observations of GW170817 indicate that binary neutron star (BNS) mergers are sites for rapid neutron-capture (r-process) nucleosynthesis. However, it remains an open question whether BNS mergers can account for all the r-process element enrichment in the Milky Way's history. I will discuss what GW170817 and subsequent gravitational-wave observations are teaching us about the...
Go to contribution page -
Reed Essick (CITA)2024-05-03, 2:20 p.m.
The structure of neutron stars provides a unique way to probe two fundamental physical interactions: gravity and the strong nuclear force. I will review our current understanding of the macroscopic properties of neutron stars and discuss associated constraints on microscopic phenomenology, including the presence of strong phase transitions. Time permitting, I will also discuss how well we can...
Go to contribution page -
2024-05-03, 2:45 p.m.
-
2024-05-03, 3:15 p.m.
Choose timezone
Your profile timezone: