Conveners
Session II
- Stephan Kuschel
Session II
- Andrea Trabattoni
Session II
- There are no conveners in this block
Session II
- Elena Litvinova
Session II
- Dimiter Balabanski
Laser-driven ion sources of picosecond duration enable new frontiers in the exploration of proton radiolysis, ultrafast atomic dynamics, and nanostructured dose distribution, providing unprecedented insights into how energy deposition influences chemical and structural change, with broad implications in medicine, chemistry, and materials science. However, ions produced by intense laser...
Laser-driven ion acceleration has attracted significant research interest due to its ability to generate high-flux pulsed ions. Applications such as compact neutron sources [1] have already been demonstrated. However, for further applications such as cancer therapy and nuclear physics studies, quasi-monoenergetic ions with controllable energy are highly desirable.
In this presentation, we...
Neutron beams have various applications, ranging from nuclear physics to medical and security. Laser-driven neutron sources are a compact technique for generating neutron beams from laser-accelerated particles. A high-power laser is directed at a target (pitcher), where it produces an ion beam with target normal sheath acceleration (TNSA). Subsequently, the ion beam propagates towards a second...
Accelerator-driven X-ray sources had a profound impact on the applications of the Mössbauer effect in all natural sciences. The enormous brilliance of X-rays delivered by these sources enabled access to smallest amounts of materials under extreme conditions and allowed for studies with time resolution and polarization sensitivity that were virtually impossible in the lab. In this way it was...
Probing resonances in Mössbauer nuclei with x-rays or γ-rays is widely used to study structure and dynamics of matter with a remarkably high energy resolution. So far, most experiments use radioactive or synchrotron radiation sources. In the past few years, self-seeded X-ray free electron lasers have become available, which provide qualitatively new conditions for studying interactions of the...
The advent of quantum sensing x-ray microcalorimeters such as Transition Edge Sensors (TESs) [1] has created exciting new opportunities to push the limits of precision physics in the hard x-ray domain. Thanks to the factor of 50 improvement in energy resolution offered by TESs over high-purity germanium [2, 3], and their high efficiency compared to crystal spectrometers [4], anti-protonic...
One of the uncharted territories in nuclear physics concerns a thrilling frontier in the study of systems where particles interact with relatively low-energy (< 20 MeV) yet extraordinarily high-intensity fields. In such environments, multi-particle processes rival and surpass traditional one-to-one interactions, opening the door to groundbreaking discoveries.
Here, we focus on a new scheme...
I review the theory side of the synergetic international effort of experimentalists and theorists in Compton scattering on one- and few-nucleon systems. It probes the symmetries and strengths of nucleonic and nuclear interactions and relates them to lattice-QCD computations of fundamental hadronic properties. The polarisabilities parametrise the stiffness of charge distributions against...
The Compton@HIGS collaboration is embarking on a program of absolute differential cross-section measurements of elastic Compton scattering from 1H [1], 2H, 3He, and 4He [2,3] nuclei over a wide range of scattering angles at energies below the pion production threshold. Using a Chiral Effective Field Theory (𝜒EFT) framework [4], we can extract the electric and magnetic polarizabilities of...
For the first time, we succeeded in observing the $\gamma$-ray beam production via Compton scattering of X-rays at an electron storage ring. Compared with laser Compton scattering, the X-ray Compton scattering is attractive because $\gamma$-ray energies can be drastically increased approaching to the ring energy. We developed a new innovative $\gamma$-ray beam source at NewSUBARU, which is a 1...
Our understanding of the nuclear collective behaviour is not yet complete. There are elusive collective modes, and new types of probes, such as vortex photons, have been proposed as a means to access them. Vortex photons could enable the identification of isovector modes other than the Giant Dipole Resonance (GDR) and thus provide new information on the nuclear Equation of State (EoS). In this...
This presentation brings into focus $^{78,80}$Kr$(\gamma,\gamma’)$ cross section measurements carried out using real photons at the HIGS/TUNL facility. The overarching physics motivation for these experimental investigations is to advance knowledge on a forefront topic in nuclear astrophysics – the nucleosynthesis beyond Fe of the rarest stable isotopes naturally occurring on Earth (the origin...
The electric dipole response of the nucleus reveals important spectroscopic features of its structure and the mechanism of its interaction with external electromagnetic and hadronic fields. Here, we present new results on dipole strength distributions of direct and cascade transitions to GDR energies in neutron-excess nuclei from various mass ranges, obtained within a theoretical approach...
This work focuses on exploring the Pygmy Dipole Resonance (PDR) in the deformed $^{154}$Sm nucleus. The study employs the ($\vec{\gamma}$,$\vec{\gamma}^{\prime}$) reaction to probe dipole states in the energy range of 3.5$~$MeV to 7.05$~$MeV, approaching the neutron separation energy at 8$~$MeV. Measurements were conducted at the HI$\gamma$S facility of the Triangle Universities Nuclear...
In contrast with the other light elements, the Li-7 measured abundance is 3-4 times lower than expected from the Big Bang Nucleosynthesis predictions. This fact is known as the “cosmological Li problem” and a better understanding of the disagreement may be achieved by studying the reactions which are leading to the Li-7 production and destruction. The $^3$H(α,γ)$^7$Li reaction contributes to...
With the low angular-momentum transfer in the inelastic scattering of real photons, the photo-excited states often have relevance also for other nuclear processes, in particular weak processes. For example, scattering of neutrinos off atomic nuclei, governed by the weak force, can predominantly excite magnetic-dipole excitations, which subsequently decay via gamma or particle emission,...
Structural effects in the lightest stable nuclei were the first to be studied experimentally. Early research focused on isospin mixing, properties of isospin multiplets, and α clustering. Recently, the existing experimental data for the γ decay of the stable N = Z doubly odd nuclei and the β decay of the corresponding isospin multiplets were reviewed [1]. Nowadays, with the advances in ab...
The Pygmy Dipole Resonance (PDR) is a low-energy excitation mode contributing to the electric dipole response in atomic nuclei. Despite significant theoretical and experimental progress over the past decades [1-3], its precise nature and origin are still under investigation. To clarify these open questions, systematic studies along isotopic and isotonic chains are essential. Such research has...
