Conveners
Plenary
- Mathis Wiedeking (Lawrence Berkley National Laboratory)
Plenary
- Yang Sun (Shanghai Jiao Tong University)
Plenary
- Filip Kondev (ANL)
Plenary
- Ani Aprahamian (University of Notre Dame)
Plenary
- Magdalena Gorska (GSI Helmholtz Centre )
Plenary
- Ben Kay (Argonne National Laboratory)
Plenary
- Carl Svensson (University of Guelph)
Plenary
- Stefan Frauendorf (University Notre Dame)
Plenary
- Michael Jentschel (ILL)
Plenary
- Kevin Insik Hahn (Center for Exotic Nuclear Studies, IBS)
Plenary
- Sean N. Liddick (Facility for Rare Isotope Beams (FRIB) / Michigan State University)
Plenary
- There are no conveners in this block
Plenary: Coffee Break
- Heather Crawford
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Caterina Michelagnoli (Institut Laue-Langevin and University of Grenoble-Alpes)15/06/2026, 08:30Oral Presentations
High-flux reactors such as the one at the Institut Laue-Langevin (ILL, Grenoble) provide intense neutron sources for many different physics purposes. In particular, thermal neutron-induced reactions can be used to probe different phenomena in an approach to study the structure of nuclei. Neutron capture reactions on (rare) stable or radioactive targets populate low-spin states below the...
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Rebecca Surman (University of Notre Dame)15/06/2026, 09:00Oral Presentations
Observables of rapid neutron capture (r-process) nucleosynthesis such as abundance patterns and light curves are shaped by both the nuclear physics and astrophysics of candidate sites. Thanks to the current generation of radioactive ion facilities, the ground state properties and even the reaction rates of the very neutron-rich, unstable species that participate in the r-process are within...
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Sean Liddick (FRIB/MSU)15/06/2026, 09:30Oral Presentations
The nuclear spin distribution defines the distribution of levels as a function of spin at a given excitation energy in a nuclear system. The spin distribution is virtually unmeasured in exotic neutron-rich nuclei and is a critical input for applications in nuclear technologies and astrophysics. With recent advances in analysis techniques, it is possible to determine model-independent partial...
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Esra Yuksel (University of Surrey)15/06/2026, 10:00Oral Presentations
Electric (E1) and magnetic (M1) dipole modes are key contributors to ฮณ-ray strength functions, directly influencing reaction rates relevant to stellar evolution and rapid neutron-capture (r-process) nucleosynthesis. Understanding electromagnetic excitations in atomic nuclei under extreme conditions, including finite temperature, is therefore crucial for advancing nuclear structure theory and...
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Andrea Richard (Ohio University)15/06/2026, 11:00Oral Presentations
Neutron-capture nucleosynthesis occurs via a variety of processes depending on the astrophysical sites and conditions. Recent observations and stellar evolution models of carbon enhanced metal poor stars (CEMP) and Rapidly Accreting White Dwarf stars (RAWDs) suggest that an intermediate process, known as the $i$-process, exists between the traditional $s$- and $r$-processes, and is necessary...
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Akaa Daniel Ayangeakaa (University of North Carolina at Chapel Hill & Triangle Universities Nuclear Laboratory (TUNL))15/06/2026, 11:30Oral Presentations
Electromagnetic probes provide a uniquely clean and selective window into the internal structure of atomic nuclei. Real photon beams, in particular, couple directly to the charge and current distributions without introducing strong interaction distortions, thereby enabling model independent spectroscopic investigations of nuclear excitations. Their well defined spin selectivity, polarization...
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Michael Block15/06/2026, 12:00Oral Presentations
In recent years, measurements of atomic and nuclear properties have been extended to the heaviest elements that do not occur naturally, using laser spectroscopy and mass spectrometry. Such heavy elements can be produced artificially at heavy-ion accelerator facilities, such as the UNILAC at GSI, but only in extremely small quantitiesโoften at the level of single atoms. This imposes stringent...
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Hye Young Lee (LANL)15/06/2026, 13:30Oral Presentations
To further strengthen our understanding of nuclear reactions underpinning astrophysics, next-generation reactor designs, and national missions, we expanded reaction measurements on both stable nuclei and radionuclides. At Los Alamos Neutron Science Center (LANSCE), we perform direct measurement of the (n,p) and (n,$\alpha$) reaction cross sections using the LENZ (Low Energy NZ) instrument. We...
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Ben Kay (Argonne National Laboratory)15/06/2026, 14:00Oral Presentations
Experimental data on single-particle energies in weakly bound systems have materialized over the past decade or so. Perhaps the most discussed has been for the neutron-rich nuclei around $N = 20$ and 28. A smooth decrease in the separation of the $2p_{3/2}$-$2p_{1/2}$ spin-orbit splittings is observed in this region as they approach zero binding. This is at odds with the well-established...
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Wolfram KORTEN (CEA Saclay)15/06/2026, 14:30Oral PresentationsInvited Abstract
The nuclear two-photon or double-gamma (2ฮณ) decay is a second-order electromagnetic decay process whereby a nucleus in an excited state emits two gamma rays simultaneously. Compared to first-order decay pathways, such as single photon emission or internal electron conversion, the two-photon decay rate is very small. Ideal cases for this search are $0^+ \rightarrow 0^+$ transition where single...
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Eleanor Ronning (INFN-Padova)15/06/2026, 15:30Oral Presentations
Statistical nuclear properties like the $\gamma$-ray strength function ($\gamma$SF) and nuclear level density (NLD) can be used to probe trends in nuclear structure and constrain astrophysical neutron capture reaction rates. Features in the $\gamma$SF such as the giant dipole resonance, pygmy dipole resonance, scissors mode, and low energy enhancement (LEE), can provide insight into properties...
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Aaron Couture (Los Alamos National Laboratory)15/06/2026, 16:00Oral Presentations
Neutron-induced reactions play important roles in understanding a wide variety of natural and man-made environments, from the production of the heavy elements in astrophysical environments, to reaction pathways in nuclear reactors, to influencing the performance of structural materials being considered for future fusion energy sources. Further, they provide a unique probe of the nucleus,...
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Carl Svensson (University of Guelph)15/06/2026, 16:30Oral Presentations
Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei (GRIFFIN) is a high-efficiency spectrometer comprised of 16 Compton-suppressed high-purity germanium (HPGe) clover detectors that has been optimized for $\gamma$-ray detection following $\beta$ decays of the low-energy (30-60 keV) beams of radioactive isotopes provided by the ISAC-I facility at TRIUMF. A key feature of the...
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Prof. Y. Alhassid (Yale University)15/06/2026, 17:00Oral Presentations
A low-energy enhancement (LEE) has been observed in the $\gamma$-ray strength function ($\gamma$SF) of mid-mass nuclei and several lanthanides, and configuration-interaction (CI) shell model calculations suggest that this enhancement originates in the magnetic dipole ($M1$) $\gamma$SF [1]. However, conventional CI shell model calculations are intractable in heavy nuclei, and the standard...
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Calin Alexandru Ur (ELI-NP / IFIN-HH)16/06/2026, 08:30Oral Presentations
Extreme Light Infrastructure - Nuclear Physics (ELI-NP) has evolved into an international, interdisciplinary research center dedicated to the emerging field of nuclear photonics. The research activities at ELI-NP are located at the frontier between nuclear physics, particle accelerator physics, high-power laser and plasma physics, and includes the development of new technologies and methods....
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Yury Litvinov (GSI Helmholtz Center for Heavy Ion Research)16/06/2026, 09:00Oral Presentations
Employing storage rings for precision physics experiments with highly-charged ions (HCI) is a powerful approach for probing fundamental questions at the intersection of atomic physics, nuclear structure, and astrophysics. Storage of freshly produced secondary particles in a storage ring is a straightforward way to achieve the most efficient use of these rare species.
Major facilities...
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Sophie Pรฉru (CEA)16/06/2026, 09:30Oral Presentations
While maintaining the standard definition of the photon force function, many models have been developed to compensate for the lack of data for experimentally inaccessible nuclei.
In this context, the added value of microscopic approaches and the progressive reduction of phenomenological ingredients introduced in their post-processing will be presented.As a key ingredient of microscopic...
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Mark Spieker (Florida State University)16/06/2026, 10:00Oral Presentations
In this invited contribution, I will present recent results from $(d,p)$ experiments performed with the Super-Enge Split-Pole Spectrograph at the John D. Fox Accelerator Laboratory of Florida State University [1] to study single-particle strengths in $fp$-shell nuclei [2-4]. After briefly highlighting the capabilities of the experimental setup [1,5], I will focus on three specific examples....
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Kevin Insik Hahn (Center for Exotic Nuclear Studies, IBS)16/06/2026, 11:00Oral Presentations
The RAON accelerator facility in Korea has recently commenced operations with its low-energy superconducting linear accelerator (SCL3) and ISOL system, providing unique opportunities for nuclear structure studies with both stable and RI beams. The Center for Exotic Nuclear Studies (CENS) is leading several experimental programs at RAON, focusing on nuclear shell evolution, collective...
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Prof. Paul Garrett (University of Guelph)16/06/2026, 11:30Oral Presentations
The evolution of ground-state shapes usually proceeds smoothly, however for Rb, Sr, Y, and Zr nuclei nuclei there is an abrupt shape transition that occurs at $N=60$ (see Refs. [1,2] for reviews). Some recent calculations, using the state-of-the-art Monte Carlo Shell Model (MCSM) [3,4] and the Interacting Boson Model employing the Intertwined Quantum Phase Transition (IQPT) [5], have been...
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Sivahami Uthayakumaar (Facility for Rare Isotope Beams (FRIB) / Michigan State University)16/06/2026, 12:00Oral Presentations
In recent astronomical observations, stellar abundance patterns of certain elements cannot be explained by traditional nucleosynthesis processes, namely the slow (s) and rapid (r) neutron-capture processes. Therefore, the emergence of an independent nucleosynthesis pathway, the intermediate (i-) process, is required to explain these observations. However, some open questions remain for the i...
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Dr Matthew Mumpower (Los Alamos National Laboratory)17/06/2026, 08:30Oral Presentations
The comprehensive characterization of nuclear excited states is fundamental to our understanding of nuclear structure and is a cornerstone for modern applications. In this work, we introduce a robust machine learning (ML) framework designed for the global prediction of nuclear energy levels with high precision. Utilizing the Evaluated Nuclear Structure Data File (ENSDF) as a foundational...
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Prof. Yang Sun (Shanghai Jiao Tong University)17/06/2026, 09:00Oral PresentationsInvited Abstract
Despite long-term research, the origin of spin cutoff parameter of angular-momentum distribution in nuclear level density (NLD) remains incompletely elucidated. The lack of spin information in the NLD severely impacts many applications, including nuclear astrophysics, fragment study in nuclear fission, and nuclear data evaluation. To classify the NLD based on total angular momentum J, it was...
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Paul Fallon17/06/2026, 09:30Oral Presentations
The Gamma-Ray Energy Tracking Array (GRETA) is 4$\pi$ detector designed to study a broad science program in nuclear structure over a wide range of beam energies and velocities from Coulomb barrier to 100โs MeV/A. It combines highly segmented HPGe crystals with advanced digital electronics and signal processing to identify individual gamma-ray interaction points within the crystals to...
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Kouhei Washiyama (The University of Osaka)17/06/2026, 10:00Oral Presentations
Recently, a spectroscopic study in $^{62}$Ti has provided important information on nuclear structure approaching $^{60}$Ca [1]. A large-scale shell model calculation shows that the ground state of $^{60}$Ca has strong quadrupole collectivity, which suggests that $^{60}$Ca belongs to the so-called "island of inversion" at $N=40$ [2].
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To study the quadrupole collectivity around $^{60}$Ca, we... -
Kostas Kravvaris17/06/2026, 11:00
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Dr Josh Brown (University of California Berkeley)17/06/2026, 11:30Oral Presentations
The Germanium Neutron Energy Spectrometer for Inelastic Scattering (GENESIS), developed at the Lawrence Berkeley National Laboratoryโs 88-Inch Cyclotron, enables the concurrent detection of neutrons and gamma rays from (n,x) reactions. The experimental setup utilizes broad-spectrum, energy-tunable neutron beams generated via thick-target deuteron breakup. To achieve simultaneous observation of...
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Futoshi Minato (Kyushu University)17/06/2026, 12:00Oral PresentationsInvited Abstract
Recent advances in beam technologies have enabled the application of weakly and electromagnetically interacting probes [1]. As these applications expand, an accurate understanding of nuclear reactions induced by muon capture and photo-nuclear processes becomes increasingly important, particularly in relation to radiation protection and the production of secondary radioactive isotopes. In...
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Jennifer Jo Ressler18/06/2026, 08:30Oral Presentations
Understanding neutron capture cross sections and the resulting ฮณ-ray emissions is critical to a wide range of scientific and industrial applications. Capture ฮณ-rays are typically high energy (~1โ8 MeV) and provide a useful, isotope-specific diagnostic. These signatures are widely used in bulk material analysis, security screening, and oil and gas well logging. Neutron capture and the...
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Haris Dapo (Turkish Accelerator and Radiation Laboratory)18/06/2026, 09:00Oral Presentations
H.ย รapo1, A. B.ย Bereketoฤlu1, A.ย ลahin1,A.ย รztรผrk1, A.ย Hacisalihoฤlu2, B.ย Yildirimdemir1, B.ย Gezer1, C.ย Taner1, C.ย Doฤan1, E. N.ย Cansiz1, F.ย K.ย Iลik1, H.ย Vural1, H. ฤฐ.ย Nalรงak1, H.ย Yildiz1, ฤฐ.ย Tan1, ฤฐ. E.ย รolak1, K.ย K.ย ลahbaz1, M.ย Tamkaล1,3, M. B.ย Gรผr1, M.ย รzdemir1, M. Z.ย ลentรผrk1, M.ย Yรผksel1, M.ย Mutlu1,
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N.ย Ergin1, O. F.ย Demirtaล1, ร.ย Karsli1, R.ย Tunรง1, R.ย Kuyrukcu1, S.ย Aydinli1,... -
Bertis Rasco (Oak Ridge National Laboratory)18/06/2026, 09:30Oral Presentations
Virtual gamma-gamma decay was first predicted by M. Goeppert-Mayer in 1929 and is the decay mode for atomic transitions from the 2S to 1S states in hydrogen. In nuclear physics it has been observed in both 0+ to 0+ decays of 16O, 40Ca, 72Ge, and 90Zr and the M4 decay from the 662 keV level in 137mBa. The single particle behavior of level widths and for virtual gamma-gamma decays are well...
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Magda Zielinska (CEA)18/06/2026, 10:00Oral Presentations
AGATA (the Advanced GAmma-ray Tracking Array) is Europeโs most advanced high-resolution gamma-ray spectrometer, providing unprecedented Doppler-correction capabilities thanks to a combination of fine detector segmentation, efficient pulse-shape analysis algorithms, and implementation of an innovative ฮณ-ray tracking concept. Since 2022, it is installed at Legnaro National Laboratories, Italy,...
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Simone Bottoni (Universitร degli Studi di Milano and INFN)18/06/2026, 11:00Oral Presentations
I will present a review of recent experimental results obtained at the Institut Laue-Langevin (ILL) using neutron-capture reactions on rare and radioactive targets and HPGe detector arrays. Various nuclear structure phenomena, including shape coexistence and particleโvibration coupling, will be examined across different regions of the nuclide chart near shell closures, with a focus on Ca and...
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Benjamin Crider (Mississippi State University)18/06/2026, 11:30Oral Presentations
Understanding how nuclear structure evolves at the limits of stability is a central goal of modern radioactive ion beam facilities. In regions of extreme neutron excess, traditional shell closures weaken and intruder configurations and deformation can emerge. ฮฒ-decay spectroscopy provides a powerful probe of these systems, particularly when production rates are extremely low and other...
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Guy Savard (Argonne National Laboratory)18/06/2026, 12:00Oral Presentations
The availability of heavy neutron-rich beams is critical to explore this region of weak nuclear binding and to our understanding of the astrophysical r-process responsible for the formation of most of the heavy elements. The CARIBU facility at ATLAS has been providing such neutron-rich beams for over a decade through harnessing the fission products from the spontaneous fission of 252Cf in a...
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Prof. Takaharu Otsuka (University of Tokyo)19/06/2026, 08:30Oral PresentationsInvited Abstract
I will present two subjects on deformed shapes. The first subject is recent findings about the superdeformed band in 62Ni and its evolution in more neutron-rich exotic isotopes.
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While this band has been known for higher spins [1], its band members down to 0 have been recently clarified theoretically and experimentally with advanced methodologies on both sides [2]. It is a... -
Neshad Deva Pathirana (Facility for Rare Isotope Beams and Michigan State University)19/06/2026, 09:00Oral Presentations
Charge-exchange (CE) reactions are a powerful tool for probing the spin-isospin response of nuclei. Because they are not restricted to a narrow Q-value window, they provide complementary access to weak-interaction processes such as $\beta$-decay and electron-capture. In particular, the proportionality between Gamow-Teller strength, B(GT), and the CE differential cross section makes it possible...
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Krzysztof Starosta (Simon Fraser University)19/06/2026, 09:30Oral Presentations
Electromagnetic transition rates are recognized as observables critical for evaluation of nuclear structure effects and verification of nuclear models. Doppler-shift lifetime measurements in inverse kinematics provide an opportunity to directly access information about electromagnetic transition rates in a way which is fully independent on the reaction mechanism. As such, Recoil Distance and...
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Zhengyu Xu19/06/2026, 10:00Oral Presentations
Beta-delayed neutron (ฮฒn) emission is a dominant decay channel for neutron-rich nuclei far from stability. The current theoretical paradigm treats ฮฒn emission in two steps independently: first, ฮฒ decay, and then neutron emission. Due to its complicated nature, the neutron-emission part is modeled using Bohrโs hypothesis of the compound nucleus [1]. It assumes neutron emission only depends on...
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Maria Markova (University of Oslo)19/06/2026, 11:00Oral Presentations
The pygmy dipole resonance (PDR) is commonly associated with an excess E1 strength on top of the low-energy tail of the giant dipole resonance (GDR) close to the neutron-separation energy in stable and unstable heavy nuclei. While its detailed structure, properties, and origin remain a matter of ongoing debates and research, the neutron-skin oscillation picture of this feature still prevails...
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Shuya Ota (Brookhaven National Laboratory)19/06/2026, 11:30Oral Presentations
Thermal neutron capture ((n,g)) gamma-ray spectroscopy is an effective approach to accurately constrain nuclear level structures. Cross sections for the production of gamma-rays following thermal (n,g) reactions have thus been measured for numerous transitions on stable nuclei across the nuclear chart. Data libraries for the cross sections, such as EGAF [1] and ENSDF [2], have been used for...
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Youngju Cho (Argonne National Laboratory)19/06/2026, 12:00Oral Presentations
The interplay between single-particle and collective degrees of freedom in atomic nuclei constitutes a fundamental aspect in quantum many-body physics. High-spin excited states of odd-even or odd-odd nuclei typically arise from the interplay between the odd nucleons in high-j orbitals and the collective behaviour of the underlying core. In this context, Au (Z = 79) isotopes provide an...
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Andrew Ratkiewicz (Lawrence Livermore National Lab)19/06/2026, 13:30Oral Presentations
Neutron-induced reactions on unstable nuclei are important for a variety of pure and applied studies. However, because both the neutron and the target are radioactive, direct measurements are often impossible. Several indirect approaches have been developed to constrain these important reactions. I will discuss indirect constraints, their limitations, applications, and prospects. I will share...
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Kris Hagel (Cyclotron Institute, Texas A & M University)19/06/2026, 14:00Oral Presentations
Photon strength functions for $^{58}$Fe using Oslo and Shape methods as well as the Forward Method have been extracted using particle-gamma coincidence data measured with the Detector Array for Photons, Protons and Exotic Residues (DAPPER). Using the Oslo and Shape methods, the impact on the resulting level density and photon strength function of different treatments of gamma-ray energies are...
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Wenlong Zhan19/06/2026, 14:30
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Asli Kusoglu
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T. OtsukaInvited Abstract