(α,n) reactions play a pivotal role in a variety of astrophysical sites and mass regions, and they can help us understand the origin of the elements. Their astrophysical rates are the main nuclear physics uncertainty in the weak r-process (also known as the α-process), which occurs in the neutrino driven ejecta of core-collapse supernovae and can explain the production of the lighter heavy elements, that are observed in metal poor stars. The 22Ne(α,n)25Mg and 13C(α,n)16O reactions are the main neutron sources for the s- and the i-processes.
Embracing the virtual nature of the workshop, the meeting will be broken into three half-day sessions. No parallel sessions are planned. Zoom will be used for the primary presentation of technical content, while substantial breaks are planned where critical informal discussion can take place in Gather.Town. Gather.Town allows us to invite you for a virtual coffee and exciting discussions.
Planned topics of discussion include:
We would like to invite you to participate in an online IReNA sponsored workshop on all things R-matrix that will be held from June 21 - 24, 2021. This meeting will have an abbreviated format and will focus on presentations by young and early career researchers.
The aim of this meeting is to bring together a diverse group of researchers with representatives from experiment and theory who utilize the R-matrix formalism for a variety of purposes.
Talks will span a wide range of topics covering experimental, theoretical, evaluation developments using R-matrix.
A NICER View of Neutron Stars, featuring Anna Watts (University of Amsterdam) (Opens in a new window)
Professor Anna Watts
University of Amsterdam
Hosted by Chiranjib Mondal
Three-dimensional hydrodynamical simulations unravel the evolution of SN 1987A from the explosion to the supernova remnant (Opens in a new window)
Dr. Masaomi Ono
Abstract: Supernova 1987A (SN 1987A) provides a unique opportunity to unravel the evolution of core-collapse supernovae (CCSNe) from the explosions to their supernova remnants (SNRs) thanks to its proximity and youth. Early observation of iron lines has indicated matter mixing during the explosion to convey innermost 56Ni to outer layers. Since the density structure of the progenitor star affects the matter mixing, it provides a hint on the properties of the progenitor star.
Constraining Tidal deformability from finite nuclei data, Bijay Agrawal (Saha Institute of Nuclear Physics) (Opens in a new window)
*Please note that this seminar will take place at 11:00am ET
Saha Institute of Nuclear Physics
The tidal deformability inferred from the Gravitational Waves, which are emitted by merging neutron stars, are instrumental in determining the equation of state (EoS) of dense matter. The importance of the observed finite nuclei properties in unveiling the correlations of the tidal deformability with the key EoS parameters will be discussed.
PAN-CAKE is a free online masterclass for teachers scheduled on March 13 & 14, 12:30-4:00pm ET. Science teachers (from pre-service to veterans) in the US and Canada will learn about world-class scientific research in nuclear astrophysics at MSU’s Facility for Rare Isotope Beams. This is an opportunity to meet scientists and other educators, take a “virtual tour” of a leading rare isotope laboratory, collect tools and demos for your curriculum, and discover the future of research.
Michigan State University
Are you connected with your “self”? with others? With your past and present?
In this presentation specially dedicated to graduate students and postdocs, we will explore linkages with mental well-being. There will be opportunities for discussion and questions.
University of Regina
Hosted by: Mansi Saxena (Ohio University)
r-process nucleosynthesis and the production of heavy elements: A nuclear physics perspective (Opens in a new window)
(ECT*), Trento, Italy
About half of the chemical elements heavier than iron that found in nature are produced during the rapid neutron-capture process (r process). In August 2017, the observation of the kilonova light curve, an electromagnetic transient produced by the radioactive decay of r-process nuclei synthesized during the merger of two neutron stars, marked the beginning of a new era for r-process studies where nucleosynthesis predictions can be directly confronted with astronomical observations.
Supernovae produce elements across the periodic table and are probes of stellar evolution, explosion physics and compact object formation.
Nuclear-physics and multi-messenger constraints on the neutron-star equation of state (Opens in a new window)
Los Alamos National Laboratory
Neutron stars contain the largest reservoirs of degenerate fermions, reaching the highest densities we can observe in the cosmos, and probe matter under conditions that cannot be recreated in terrestrial experiments. Throughout the Universe, a large number of high-energy, cataclysmic astrophysical collisions of neutron stars are continuously occurring.
JINA-CEE and IReNA will organize “JINA Horizons” on November 30 - December 4, 2020 - a virtual meeting that brings together the international nuclear astrophysics community to discuss open questions and future directions.
Texas A&M University
A small fraction of old, metal-poor stars exhibits large enhancements in elements produced in the rapid neutron capture (r-)process. Their chemical composition, mapped through detailed abundance analysis, is a direct fingerprint of the elements produced in the stellar generation before them. This makes them excellent laboratories for studying the r-process. The first r-process enhanced star was discovered over 30 years ago. Since then, about 30 highly r-process enhances stars have been found in the Milky Way halo.
Nucleosynthesis and observational evidences of magneto rotational driven supernovae (Opens in a new window)
Abstract: About half of the heavy elements in our Universe are synthesized by one process, the rapid neutron capture process (r-process). This process requires extreme and violent environments that achieve the necessary neutron-rich conditions. Neutron star mergers and magneto rotational driven supernovae are promising candidates to host the r-process. We investigate the r-process from an observational as well as a nucleosynthesis point of view.
University of Hertfordshire
Abstract: Galactic chemical evolution (GCE) can provide stringent constraints not only on nuclear astrophysics but also on the formation and evolutionary history of the Milky Way itself, through an approach called Galactic archeology.
Constraining the key input to X-ray burst models and the role of active-targets (Opens in a new window)
University of Notre Dame
Abstract: Type-I X-ray bursts (XRBs) are among the most frequent thermonuclear explosions in the Universe. Detailed models are required to constrain the mass-radius relation and other underlying physics through comparisons between the observations and models.
Core-Collapse Supernovae: From Neutrino-Driven 1D Explosions to Light Curves and Spectra (Opens in a new window)
North Carolina State University
Abstract: The number of observed core-collapse supernova lightcurves is growing every day, providing valuable clues about progenitors, stellar evolution, the explosion mechanism, the nuclear equation of state, nucleosynthesis, and the formation of neutron stars and black holes. However, interpreting electromagnetic observables correctly is a formidable challenge, one that requires detailed and accurate theoretical modeling.