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Shunji NISHIMURA (RIKEN)10/20/26, 9:50โฏAM
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Hendrik Schatz (Michigan State University)10/20/26, 10:00โฏAMExplosive stellar objects and nuclear physicsInvited Presentation
Accreting neutron stars show a broad range of nuclear physics driven observable phenomena. These include short and long X-ray bursts, superbusrts, possible hyper bursts, absorption features in spectra, and crustal cooling. I will review the open questions as well as the current status and prospects of understanding the underlying nuclear physics. In that context I will present some recent...
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Prof. Yukikatsu Terada (Saitama Univ. / JAXA)10/20/26, 10:25โฏAMOral Presentation
Since the discovery of the kilonova GRB130603B (Tanvir et al. 2013) and the gravitational-wave event GW170817 (Villar et al. 2017), neutron-star mergers (NSMs) have been regarded as the leading candidates for the r-process nucleosynthesis site. Although MeV gamma rays from unstable r-process nuclei would provide direct evidence of the r-process site, their expected luminosities are very dim...
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Chaeyeon Park (IRIS/IBS)10/20/26, 10:45โฏAMOral Presentation
Type I X-ray bursts, one of the explosive astrophysical phenomena, provide important sites for nucleosynthesis. The 14O(ฮฑ,p)17F reaction is a key breakout pathway from the hot CNO cycle and strongly influences the onset of the rapid proton-capture process. However, most available constraints rely on indirect measurements, and direct cross-section data in the low-energy regime relevant to X-ray...
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Nonoka Ishii (Department of physics, Kyoto University)10/20/26, 11:05โฏAMOral Presentation
Type I bursts are transient explosions triggered by the thermonuclear burning of the accreted matter accumulated on neutron star (NS) surfaces. Among Type I bursters, several sources exhibit bursts with nearly constant recurrence times ($t_{\rm rec}$), known as โclocked burstsโ. Clocked bursters serve as useful probes for the nature of low-mass X-ray binaries (LMXBs)โincluding accretion rate,...
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Kouichi Hagino (Department of Physics, Kyoto University)10/20/26, 11:45โฏAMTheoretical nuclear physics for astrophysicsInvited Presentation
Recent experimental data have demonstrated that the coupled-channels
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approach significantly overestimates fusion cross sections at deep subbarrier
energies. This phenomenon, referred to as fusion hindrance,
was first identified in the 60Ni+89Y system, and has subsequently been observed
in several other medium-heavy systems, such as 64Ni+64Ni. However, it remains
unclear to what... -
Muhammed Riyas A (University of Calicut, Kerala, India)10/20/26, 12:10โฏPMOral Presentation
The intermediate neutron-capture process (i-process) has emerged as one of the most promising yet least understood nucleosynthetic mechanisms responsible for the production of heavy elements beyond iron. Operating at neutron densities intermediate between those of the slow (s-) and rapid (r-) neutron-capture processes (~10ยนยณโ10ยนโต cmโปยณ), the i-process is capable of producing distinctive...
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Tik Tsun Yeung (The University of Tokyo)10/20/26, 12:25โฏPMOral Presentation
Unlocking the origins of the third r-process peak requires a broader understanding of the neutron-rich nuclei near the N=126 shell closure. To validate theoretical predictions and improve r-process calculations, new experimental data on these exotic isotopes are critical. This talk reports on measurements of half-lives and ฮฒ-delayed neutron emission probabilities ($P_n$) for neutron-rich...
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Baha Balantekin (University of Wisconsin, Madison)10/20/26, 2:00โฏPMTheoretical nuclear physics for astrophysicsInvited Presentation
Collective oscillations of neutrinos represent emergent nonlinear flavor evolution phenomena instigated by neutrino-neutrino interactions in astrophysical environments with sufficiently high neutrino densities. These many-body systems exhibit interesting properties such as quantum entanglement. In this talk efforts to calculate evolution of the many-neutrino systems beyond the mean-field...
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Jordan Marsh (The University of Edinburgh)10/20/26, 2:25โฏPMBig Bang cosmology and primordial nucleosynthesisInvited Presentation
Big Bang Nucleosynthesis (BBN) models combine cosmological and particle physics models with nuclear reaction cross section data to predict the primordial abundances of the light elements. The deuterium abundance is of particular focus as it is extremely sensitive to the baryon density in the early Universe. A precise measure of the baryon density from BBN, along with precision measurements of...
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Grant Mathews (University of Notre Dame)10/20/26, 2:50โฏPMOral Presentation
Big Bang Nucleosynthesis, Cosmic Entropy, Gravity, and the Cosmological Lithium Problem
Big Bang Nucleosynthesis remains as a pillar of modern cosmology against which any modification of physics in the early universe must be constrained. This includes Einsteinโs gravity and our understanding of the formation and evolution of stars in the early universe.. In this talk we will explore a...
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Ella Wang (Stockholm University)10/20/26, 3:10โฏPMOral Presentation
Lithium is the heaviest element produced during Big Bang nucleosynthesis. The amount produced can be predicted through the cosmic microwave background and measured through old metal-poor stars. Li has two stable isotopes, with Li-7 being more abundant than Li-6. In particular, the detection of Li-6 in old metal-poor halo stars contradicts the Big Bang nucleosynthesis prediction by 5 orders of...
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Naohito IWASA (Department of Physics, Tohoku University)10/20/26, 3:30โฏPMOral Presentation
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\noindent The $^7$Be($n,p_1$)$^7$Li$^*$ reaction relevant to the cosmological lithium problem studied with the $^9$Be($^3$He,$\alpha$)$^8$Be($p$)$^7$Li and $^7$Li($^3$He,$d$)$^8$Be($p$)$^7$Li reactions\
\vspace{5mm}N. Iwasa,$^1$ K. Ichimura,$^1$ S. Ishikawa,$^1$ S. Kubono,$^{2, 3}$ M. Egeta,$^1$ \
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T. Haginouchi,$^1$... -
Anton Wallner (FWIR-HZDR)10/20/26, 4:20โฏPMExplosive stellar objects and nuclear physicsInvited Presentation
Earth is exposed to nearby cosmic events. Freshly produced radionuclides in the interstellar medium contain information about how and where the heavy elements are made in nature. The solar system moves through the interstellar medium (ISM) and collects interstellar dust particles that contain fresh nucleosynthetic signatures, including the radionuclides Fe-60 (t${_{1/2}}$=2.6 Myr) and Pu-244...
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Sunghoon (Tony) Ahn (Institute for Basic Science)10/20/26, 4:45โฏPMExperimental nuclear physics for astrophysicsInvited Presentation
Nuclear physics inputs for rare isotopes remain one of the major sources of uncertainty in model predictions for astrophysical observables such as X-ray burst light curves, elemental abundance patterns, and stellar evolution. In particular, reaction rates involving short-lived nuclei and the resonance properties that govern them play an important role in explosive hydrogen and helium burning,...
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Chaoyi FU (Institute of Modern Physics, Chinese Academy of Sciences)10/20/26, 5:10โฏPMOral Presentation
The HIAF project completed technical construction by the end of 2025, and started beam commissioning of the complex thereafter.
In April 2026, high-precision mass measurements of short-lived rare isotopes produced via projectile fragmentation of a $^{209}$Bi beam were successfully conducted with the storage ring SRing and in-flight separator HIRIBL, employing Isochronous Mass Spectrometry,...
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Yoshikazu HIRAYAMA (IPNS, KEK)10/20/26, 5:30โฏPMOral Presentation
The KEK Wako Nuclear Science Center (WNSC) has developed the KEK IsotopeใSeparation System (KISS) at RIKEN to study the nuclear properties such as half-lives and atomic masses of the nuclei in the vicinity of neutron magic number N = 126, trans-uranium elements, and actinides. This research aims to explore the origin of heavy elements synthesized by the rapid neutron capture process.
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The... -
Shun Iimura10/20/26, 5:50โฏPMOral Presentation
Nuclear masses of unstable nuclei are essential inputs for understanding nuclear structure far from stability and astrophysical nucleosynthesis. For neutron-rich nuclei, neutron separation energies are among the key nuclear inputs that shape the r-process path and element abundance peaks. However, experimental data remain limited for heavy neutron-rich isotopes relevant to the r-process. At...
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Jordi Jose (UPC Barcelona)10/21/26, 9:30โฏAMExplosive stellar objects and nuclear physicsInvited Presentation
Novae and X-Ray Bursts are among the most important stellar explosions in our Galaxy. Classical novae are driven by thermonuclear explosions in the envelopes accumulated through mass transfer onto white dwarf stars in close binary systems. During these events, approximately $10^{-7}-10^{-4}$ M$_\odot$ of material enriched in CNO nuclei, and in some cases in intermediate-mass elements such as...
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Christian Iliadis10/21/26, 9:55โฏAMNuclear data for astrophysics and related topicsInvited Presentation
Thermonuclear reaction rates are essential inputs for predictive models of stellar structure, evolution, explosions, and nucleosynthesis. In this talk, I will present a new evaluation of experimentally based thermonuclear rates for 78 proton- and alpha-induced reactions on target nuclei in the A<40 mass region. Building on earlier Monte-Carlo reaction-rate methods, the new evaluation applies...
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Balรกzs Szรกnyi (Konkoly Observatory)10/21/26, 10:20โฏAMOral Presentation
We present new slow neutron-capture (s) process nucleosynthesis predictions calculated with the Monash post-processing code for low-mass asymptotic giant branch (AGB) stars of solar metallicity, half-solar, and double-solar metallicity. We updated many of the nuclear inputs related to decay and neutron-capture rates and will present several significant results related to presolar...
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Johann Wiggert Brummer (iThemba LABS)10/21/26, 10:40โฏAMOral Presentation
The iThemba Laboratory for Accelerator-Based Science (LABS) in Cape Town, South Africa, is a leading facility in Africa with regard to experimental nuclear physics as well as radioisotope production. The lab hosts various accelerators, with one such instrument being the K=200 separated-sector cyclotron (SSC). The K=600 magnetic spectrometer, one of the SSC end stations, coupled with its...
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Bingyang Tan (National Astronomical Observatories, Chinese Academy of Sciences)10/21/26, 11:00โฏAMOral Presentation
The diffuse $\gamma$-ray emission from short-lived radioactive $^{26}\text{Al}$ and $^{60}\text{Fe}$ provides a direct probe of ongoing nucleosynthesis in the Galaxy. However, theoretical models have long struggled to reproduce the observed $^{60}\text{Fe}/^{26}\text{Al}$ flux ratio, typically predicting values significantly higher than the constraints derived from INTEGRAL/SPI observations....
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Chiaki Kobayashi (University of Hertfordshire)10/21/26, 11:40โฏAMFirst-generation stars and galactic chemical evolutionInvited Presentation
Extra-galactic archaeology - elemental abundances of high-z galaxies
The James Webb Space Telescope (JWST) is expected to find the first galaxies - those hosting metal-free stars. Surprisingly, though, galaxies with strong metal lines have been detected indicating unusual chemical composition (e.g. high N/O ratio). Nitrogen can be enhanced not only by asymptotic giant branch (AGB) stars...
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Dr Miho Ishigaki (National Astronomical Observatory of Japan)10/21/26, 12:05โฏPMOral Presentation
Potassium (K; Z = 19) is an essential element for life and for the formation of rocky planets. Along with other odd-Z elements such as scandium (Sc) and vanadium (V), potassium is generally thought to be synthesized during the evolution of massive stars or at the moment of core-collapse supernova explosions. However, quantitative predictions of potasium yields in massive stars, as well as the...
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Bakuh Danang Setyo Budi (SOKENDAI/NAOJ)10/21/26, 12:25โฏPMOral Presentation
Standard stellar evolution predicts severe lithium depletion in evolved stars; however, a rare subset of giants with lithium abundances exceeding meteoritic values, known as โsuper Li-richโ (SLR; A(Li) > 3.3) stars, defies this expectation and presents a major astrophysical puzzle. To understand this extreme enhancement, it is essential to distinguish internal production (e.g., a โlithium...
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Weiping Liu (China Institute of Atomic Energy)10/21/26, 1:55โฏPMInvited Presentation
The Jinping Underground experiment for Nuclear Astrophysics (JUNA) takes advantage of the ultra-low background of the CJPL to conduct experiments for directly studying crucial reactions at stellar energies in the evolution of stars. From 2020, JUNA commissioned an mA level high current accelerator based on an ECR source, as well as high efficiency BGO and 3He detectors. These combination...
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Alba Formicola (INFN Roma)10/21/26, 2:20โฏPMUnderground nuclear astrophysicsInvited Presentation
The goal of nuclear astrophysics is to measure nuclear reaction cross sections of astrophysical interest and to determine reaction rates in order to improve our understanding of stellar evolution and the synthesis of the elements. At the typical temperatures of stellar interiors, the relevant energy regionโthe so-called Gamow windowโis of the order of a few hundred keV, where nuclear cross...
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Denise Piatti (INFN, Division of Padova)10/21/26, 2:45โฏPMOral Presentation
The $^{19}$F + p reactions play a key role in two main scenarios: on one hand the nucleosynthesis of heavy elements (A $\le$ 40) via CNO break out, as observed in ultra-iron-poor stars. On the other hand, a precise knowledge of the $^{19}$F + p reaction rates, which represent the main destruction channels of fluorine, is crucial to understand its puzzling galactic origin and abundance. Among...
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Aurora Tumino (Dipartimento di Ingegneria e Architettura, Universita degli Studi di Enna โKoreโ, Italy & INFNโLNS, Laboratori Nazionali del Sud, Catania, Italy)10/21/26, 3:05โฏPMOral Presentation
The 16O(12C,ฮฑ)24Mg reaction is one of the major channels of the 12C+16O fusion process and plays
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an important role during the advanced evolution of massive stars (M>8Mโ), as well as during explosive
carbon and oxygen burning. The astrophysical energy region extends from 3 to 7.2 MeV in the center-of-mass frame.
Experimental investigations of the 16O(12C,ฮฑ)24Mg reaction are currently limited... -
rosario pizzone (infn lns)10/21/26, 3:25โฏPMOral Presentation
Nuclear reactions induced by neutrons play a key role in several astrophysical scenario like primordial nucleosynthesis, s and r process and so on. From an experimental point of view, their reaction cross sections and reaction rates at astrophysically relevant temperatures are usually a hard task to be measured directly. Nevertheless big efforts in the last decades have led to a better...
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Tetsuya Yokoyama (Department of Earth and Planetary Sciences, Institute of Science Tokyo)10/21/26, 4:15โฏPMMeteorite analysis and isotopic abundancesInvited Presentation
Sample return missions are of vital importance to the scientific community, particularly in the domains of planetary science and cosmochemistry. These missions provide pristine, terrestrially unaltered extraterrestrial materials that can be analyzed in a laboratory with a level of detail that is not possible through remote sensing. The recent success of asteroid sample return missions has led...
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Nan Liu (Boston University)10/21/26, 4:40โฏPMMeteorite analysis and isotopic abundancesInvited Presentation
Meteoritic isotopic anomalies preserve the isotopic fingerprints of stellar nucleosynthesis before and during Solar System formation. In presolar grains, these signatures can be measured in individual stellar condensates, while bulk meteorite components and leachates record the incomplete mixing of distinct nucleosynthetic carriers in the solar protoplanetary disk. Together, these materials...
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74. The evidence of the supernova neutrino-process recorded in the oldest solids in the solar systemTakehito Hayakawa (National Institutes for Quantum Science and Technology)10/21/26, 5:05โฏPMOral Presentation
A huge number of neutrinos radiated at supernova explosions is considered to have an important role for production of some rare isotopes (ฮฝ-process). Although some measurements such as astronomical observation of 19F in metal poor stars and the existence of a short-lived radioisotope of 92Nb at the solar system formation in primitive meteorites are candidates for the ฮฝ-process, there is no...
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Hiroyuki Hashizume (Department of Earth and Planetary Science, The University of Tokyo)10/21/26, 5:25โฏPMOral Presentation
Presolar grains are survivors of circumstellar dust preserved in primitive meteorites. They enable laboratory analyses of circumstellar dust formation and evolution [1]. Astronomical observations and circumstellar models suggest that circumstellar dust of oxygen-rich asymptotic giant branch (AGB) stars comprises diverse mineral phases, including predominantly amorphous, Mg-rich silicates,...
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Prof. Alex Gezerlis (University of Guelph)10/22/26, 9:30โฏAMTheoretical nuclear physics for astrophysicsInvited Presentation
After a brief overview of modern nuclear theory (covering both ab initio and phenomenological techniques), this talk will address a number of our recent works on many-nucleon systems. One such line of research involves the propagation of theoretical uncertainties from the chiral nuclear
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interaction all the way to the few- and many-nucleon level, using quantum Monte Carlo and efficient... -
Dr Sota KIMURA (KEK)10/22/26, 9:55โฏAMOral Presentation
The neutron-rich, lighter actinoid isotopes are important for revealing the origin of the heavy r-process elements beyond Pb, such as uranium. In the recent observations, the r-process element was identified in the kilonova AT2017fgo associated with the neutron-star merger. Moreover, the theoretical study has shown that the radioactive isotopes produced by the r-process play an important role...
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Dr Nobuya Nishimura (Kogakuin University)10/22/26, 10:15โฏAMOral Presentation
A quantitative understanding of nuclear fission is important in nuclear physics, astrophysics, and nuclear applications. However, its full physical description remains unresolved because fission is a complex multistage process. We investigate the fission properties of neutron-rich uranium isotopes relevant to r-process nucleosynthesis, focusing on fragment mass distributions and prompt neutron...
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Miikka Winter (University of Jyvรคskylรค)10/22/26, 10:35โฏAMOral Presentation
Approximately half of the nuclei heavier than iron are produced by the rapid neutron-capture process (r process). The r process nucleosynthesis can be simulated with nuclear reaction network codes for which nuclear data input is important. In particular, neutron-capture and photodisintegration rates are essential as they directly affect the outcome of the simulations. One of the key...
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Roland Diehl (Max Planck Institut fรผr extraterrestrische Physik, D-ยญโ85741 Garching, Germany)10/22/26, 11:15โฏAMAstronomical observations with light, X-ray, gamma-ray, and cosmic raysInvited Presentation
Nuclear astrophysics requires nuclear astronomy as it aims to understand compositional enrichment of matter in galaxies during cosmic evolution. Measuring characteristic gamma rays from nuclear transitions is among the most direct such astronomies. Yet, instrumental challenges from penetrating gamma rays and large instrumental backgrounds of such gamma-ray telescopes have constrained advances...
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Dr Fulong Liu (CNS,University of Tokyo)10/22/26, 11:40โฏAMOral Presentation
Sensitivity studies identify the $^{102}$Pd$(p,\gamma)^{103}$Ag reaction rate at temperatures $T_9 \simeq 2.0-3.0$ as an important nuclear input for both $p$- and $rp$-process nucleosynthesis. However, experimental information in the relevant Gamow window remains incomplete: no data are available below $E_{\mathrm{c.m.}} = 2.5$~MeV, and measurements at higher energies show sizable...
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Oliver Just (GSI Darmstadt)10/23/26, 9:30โฏAMStellar evolution and hydrostatic burning processesInvited Presentation
Kilonovae offer the potential to constrain the properties of high-density matter but the detailed sensitivities are still relatively poorly understood. An important question is whether the lifetime of the hypermassive neutron star remnant can be constrained from the kilonova signal. I will report a recent study suggesting that the lifetime can be constrained using the imprint of helium on the...
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Shinya Wanajo (YITP)10/23/26, 9:55โฏAMExplosive stellar objects and nuclear physicsInvited Presentation
We present our latest study of r-process based on a first-principle model of neutron star mergers, in which general relativity, neutrino transport, and magnetic field are self-consistently implemented. We find that magnetic field plays a pivotal role in the mass ejection and the determination of neutron richness. In this presentation, we discuss how neutron star mergers produce the solar-like...
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Hitoshi Nakada (Chiba University)10/23/26, 10:20โฏAMOral Presentation
The semi-realistic nucleonic interaction, particularly M3Y-P6 [1], has been shown to describe single-particle potentials from negative energy [2] to relatively high energy (+80MeV) [3] well, within the self-consistent mean-field (or Kohn-Sham) framework. Based on this success, the nuclear equation of state at finite temperature with M3Y-P6 is provided, which is compatible with the low-energy...
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Dr Nikolai Shchechilin (Institute of Science Tokyo)10/23/26, 10:40โฏAMOral Presentation
Sub-saturation clustered nuclear matter constitutes a substantial part of neutron stars (NSs) and thus plays an essential role in multiple related phenomena, including NS cooling, oscillations and emission of gravitational waves. These complex layers are exposed to distinct astrophysical conditions, ranging from a cold-catalyzed state to a heated, out-of-equilibrium and partially dissolved...
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Wako Aoki (National Astronomical Observatory of Japan)10/23/26, 11:25โฏAMOral Presentation
High-dispersion spectroscopic observations have been conducted using the Subaru Telescope for metal-poor star candidates detected by China's spectroscopic survey telescope LAMOST, determining the chemical composition of about 400 objects [1, 2]. We have determined detailed abundances of heavy elements for objects that show excesses of elements heavier than iron, with analyzing the kinematics...
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Mingjie Jian (Institute of Astronomy, University of Cambridge)10/23/26, 11:45โฏAMOral Presentation
Phosphorus is an odd-Z element of astrobiological and nucleosynthetic interest, yet its Galactic origin remains poorly constrained because observable stellar P lines are weak and mostly located outside the optical wavelength range. I will present phosphorus abundance measurements for 102 evolved stars, including 82 giants in 24 open clusters and 20 classical Cepheids, based on high-resolution...
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Shota Shibagaki (Wrocลaw University of Science and Technology)10/23/26, 12:05โฏPMOral Presentation
Magnetorotational (MR) core-collapse supernovae are driven by rapid rotation and strong magnetic fields and may lead to energetic explosions. Understanding the multidimensional fluid dynamics of these events is essential for predicting their observational signatures and nucleosynthetic implications. To this end, we perform three-dimensional general relativistic magnetohydrodynamic (GRMHD)...
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Ante Ravlic (Facility for Rare Isotope Beams, Michigan State University)10/23/26, 1:40โฏPMInvited Presentation
Beta decay and electron capture (EC) are processes mediated by the weak nuclear interaction. Both play a prominent role in the late stages of stellar evolution and during core-collapse supernova explosions. In this talk, I will give an overview of our recent work on calculating EC and beta-decay rates in stellar environments and their implications for core-collapse supernova dynamics [1,2]....
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Vi Phong (Radioactive Isotope Physics Laboratory, RIKEN Nishina Center)10/23/26, 2:05โฏPMExperimental nuclear physics for astrophysicsInvited Presentation
The search for the limits of nuclear existence at extreme isospin toward the neutron drip line is at the forefront of modern nuclear physics. Along this line, the astrophysical rapid neutron capture process (r-process), which is responsible for the synthesis of about half of the elements heavier than iron [1], provides one of the strongest motivations. The ฮฒ-decay properties of very...
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Andreas Flรถrs (GSI Helmholtz Centre For Heavy Ion Research)10/23/26, 2:30โฏPMOral Presentation
Recent infrared observations obtained with the James Webb Space Telescope (JWST) have significantly advanced the study of kilonovae, delivering the first detailed nebular-phase spectra of AT 2023vfi, only the second kilonova to be observed spectroscopically. The spectra exhibit prominent mid-infrared emission features, some of which have been tentatively linked to r-process elements such as...
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Jan Kuske (TU Darmstadt)10/23/26, 2:50โฏPMOral Presentation
The rapid neutron-capture (r-) process is responsible for producing approximately half of the elements heavier than iron in the Universe. However, the astrophysical sites capable of generating the required extreme neutron fluxes remain uncertain. Detailed hydrodynamical simulations of proposed scenarios - such as binary neutron star mergers, magneto-rotational supernovae, and collapsars - are...
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Prof. Samar Safi-Harb (University of Manitoba)10/23/26, 3:35โฏPMExplosive stellar objects and nuclear physicsInvited Presentation
Supernova remnants and pulsar wind nebulae are nearby laboratories for studying some of the most extreme conditions in the Universe. As the debris of massive star explosions and the environments of newly born compact objects, they provide unique and nearby probes of supernova progenitors, explosive nucleosynthesis, neutron star birth properties, relativistic winds, magnetic fields, and...
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Dr Sunghan Bae (IRIS, IBS)10/23/26, 4:00โฏPMOral Presentation
Abstract: The neutron-capture rate in the rapid neutron-capture process (r-process) is one of the major sources of uncertainty, leaving the physical conditions for the r-process not fully constrained [1]. It was suggested that the compound-nucleus neutron-capture rate of 130Sn has a large impact on final r-process elemental abundances [1, 2]. We performed a (d,p) surrogate-reaction measurement...
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Shunji NISHIMURA (RIKEN)10/23/26, 4:20โฏPM
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