Présidents de session
parallel session
- Kyle Leach (Colorado School of Mines)
parallel session
- Thomas Cocolios (KU Leuven)
parallel session
- Wilton Catford (University of Surrey)
parallel session
- Jens Lassen (TRIUMF - Canada's particle accelerator centre)
parallel session
- Robert Bark (iThemba LABS)
parallel session
- Julia Even (University of Groningen)
parallel session
- Klaus Wendt (Johannes Gutenberg University Mainz)
parallel session
- Daniel Bazin (MSU-FRIB)
parallel session
- Michael Block (GSI/HIM/JGU)
parallel session
- Filip Kondev
parallel session
- Rafael Ferrer (KU Leuven - IKS)
parallel session
- Wilfried Nörtershäuser (TU Darmstadt)
Despite its success, the Standard Model (SM) is currently being scrutinized on multiple fronts as it fails to explain many features of nature including the matter/anti-matter asymmetry, dark matter and even gravity. One probing mechanism for new physics is the unitarity test of the Cabibbo-Kobayashi-Maskawa matrix. A series of recent transition-independent radiative corrections resulted in a...
$^{13}$Be is the first neutron-unbound isotope of beryllium on the neutron-rich side. Its structure has been the subject of many experimental and theoretical studies with often conflicting results. Even the spin-parity of the ground state is still uncertain. We performed an experiment in which the T=5/2 states in $^{13}$B, the isobaric analogs of $^{13}$Be, were populated in $^{12}$Be+p...
The gamma-ray decay of nuclear states in the quasi-continuum provides important insights into nuclear structure effects and constraints to nucleosynthesis processes. In particular, measurements of Nuclear Level Densities (NLDs) and Photon Strength Functions (PSFs) have and will continue to play a central role as we are entering an era of incredible potential for novel measurements. This is due...
The ultimate goal of RAON (Rare Isotope Accelerator Complex for Online Experiments) is to combine the Isotope Separator On-Line (ISOL) and In-Flight Separator (IF) systems to produce more exotic rare isotope (RI) beams and access unexplored regions of the nuclear landscape. As the first step, we completed the installation of the ISOL facility in June 2021. The RAON ISOL facility consists of a...
Astrophysical simulations predict that $^{22}$Na is produced in novae explosions. With its half-life of 2.6 years and its characteristic $\gamma$-ray of 1.275 MeV, it could be easily identified and measured with $\gamma$-ray space telescopes, which has not been the case yet. The amount of $^{22}$Na produced in novae depends on the rate of nuclear reactions, and in particular on the...
Shape coexistence is a phenomenon in which the same nuclei can possess different macroscopic shapes. The alpha-decay study for Pb-186 have shown a unique triplet of 0+ states which has been associated with spherical, prolate and oblate shapes [1]. Collective bands built upon these deformed 0+ states have been observed in in-beam gamma-ray spectroscopy experiments [2; 3]. However, gamma-ray...
Approximately 30 stable nuclides on the neutron-deficient side of stability cannot be produced via the same neutron-capture driven mechanisms responsible for synthesizing all other elements heavier than iron. These “p-nuclei” are instead thought to originate from photodisintegration reactions on s- and r-process seed nuclei, which can occur in the extreme high-temperature environments of...
With access to very neutron-rich isotopes, the neutron emission from excited states populated after beta decay becomes a dominant decay mode. The neutron energy measurement informs about beta-decay strength distribution, which is driven by shell effects. The neutron emission is considered to be statistical. Discrete neutron and gamma-ray spectroscopy measurements performed in nuclei ranging...
Fission of 210Fr, produced by (d,p)-transfer reaction of the 209Fr beam was investigated at HIE-ISOLDE. Four Timepix3 pixel detectors were installed on the body of Actar TPC demonstrator chamber. Polyethylene converters were used for the detection of fast neutrons. Since no significant background was observed, it was possible to measure the spatial distribution of emitted neutrons. Subsequent...
The development and improvement in terms of performances of accelerator facilities and detectors has paved the way for extending the study of nuclear structure towards more exotic nuclei and experimental quantities that have been, until now, less accessible.
In parallel, theoretical methods have advances in precision and prediction capabilities.
In recent years, ab-initio calculations in...
For the first time, the proton capture reaction for a stored radioactive isotope has been directly measured. This measurement became possible by combining two unique facilities at GSI (Helmholtz Centre for Heavy Ion Research),
the fragment separator (FRS) and the experimental storage ring (ESR). The combination of sharp ion energy, ultra-thin internal gas target, and the ability to adjust the...
Shell gaps represent the backbone of nuclear structure and are a direct fingerprint of the in-medium many-body interactions. The nuclear shell structure is found to change, sometimes drastically, with the number of protons and neutrons, revealing how delicate the arrangement of interacting nucleons is. The neutron-rich $\it{pf}$-shell nuclei have received much attention on both experimental...
Gamma-ray imaging techniques such as positron emission tomography and single photon emission computed tomography (SPECT) have been utilized in nuclear medicine for diagnosis. The radioactive tracer imaging can provide functional or metabolic information non-invasively at the molecule or cellular level. However, nuclear medicine imaging techniques cannot extract the local molecule or cellular...
Multi-nucleon transfer (MNT) reactions between two heavy ions offer an effective method of producing heavy, neutron-rich nuclei that cannot currently be accessed efficiently using traditional projectile-fragmentation, target-fragmentation or fission production techniques [1]. These nuclei are important for understanding many astrophysical phenomena. For example, properties of the neutron-rich...
The region of refractory metals, below the magic number $Z=50$ is of particular interest for nuclear physics studies and exhibits phenomena such as deformations, shape coexistence and hints of triaxial nuclei. Laser spectroscopy has provided valuable and complementary input, providing information about the shape, size and electromagnetic moments of radioactive isotopes and isomers in this...
The isospin symmetry concept has its origins in the charge-symmetry and charge-independence characteristics of the strong nuclear force. This implies that the strong interaction has an equal strength between the proton-proton, neutron-neutron and proton-neutron pairs. Therefore, the isobaric analog nuclei of the same mass A = N + Z, but with the neutron and proton numbers differing as...
Antimony (Sb) contains 51 protons, one proton above the magic $Z = 50$ proton shell closure. Therefore, its nuclear magnetic moments serve as an ideal candidate to probe the proton single particle behavior along the Sb isotopic chain, while its quadrupole moments shed light on collective effects as a function of neutron number towards the shell closure at $N = 82$.
Phenomenological...
The study of $T=1$ triplets plays an important role in our understanding of isospin physics. A linear dependence of the proton matrix elements ($M_p$) with respect to isospin projection $T_Z$ indicates the isospin purity of states, an effect that has been studied and observed for triplets of 22 $\leq$ $A$ $\leq$ 50 [1]. As measurements of reduced electromagnetic transition probabilities become...
One of the best-known divergences from the independent-particle shell model description is the existence of islands of inversion [1]. The IoI of the region N=40 draws particular attention since the neutron number 40 was postulated as a non-traditional “magic” number and N = 40 represents the boundary between the negative-parity pf shell and the positive-parity g shell. In stable nuclei, the...
I will overview storage-ring nuclear physics at GSI/FAIR and RIKEN with a focus on recent technical developments with future perspectives. The experimental storage ring ESR at GSI has pioneered mass measurements of exotic nuclei and decay studies of highly charged ions (HCI)[1]. Radioactive ions produced at the fragment separator FRS are in-flight separated and are stored into the ESR where...
Obtaining reliable cross sections for neutron-induced reactions on unstable nuclei nuclei is crucial to our understanding of the stellar nucleosynthesis of heavy elements and for applications in nuclear technology. However, the measurement of these cross sections is very complicated due to the radioactivity of the targets involved. The NECTAR (NuclEar reaCTions At storage Rings) project aims...
The neutron-rich unstable nuclei in the vicinity of neutron magic numbers are relatively well studied, far from the stability lineup to the neutron magic number N = 82. However, for the neutron-rich nuclei to the south of 208Pb, there is limited knowledge of the excited states of these nuclei. This arises from the difficulty in producing these nuclei using conventional methods. Even for nuclei...
Determining the limits of existence of the heaviest nuclides is a forefront topic in nuclear-physics research [1]. Nuclides with proton numbers $Z\geq$100 are stabilized by shell effects that retard spontaneous fission and they feature properties distinctly different from those of lighter nuclei. However, our understanding of such shell effects in the region of the heaviest elements is limited...
The 208Pb nuclide is the heaviest known doubly-magic nucleus. Information on its neutron-rich neighbourhood is rather scarce, due to the limited mechanisms by which these nuclei can be populated. However, experimental information on neutron-rich N=126 nuclei is of paramount importance not only for nuclear structure physics, but also for implications for astrophysics. Theoretical predictions...
The long Sn isotopic chain is a formidable testing ground for nuclear models aiming at describing the evolution of the shell structure. Low-lying excited states roughly exhibits the typical behavior predicted by the generalized seniority scheme. However, the corresponding B(E2; 0⁺→2⁺) values, approaching the N=Z=50 shell closure, have shown a presumed deviation from the expected parabolic...
The development of collectivity along the $N=Z$ is one of the subjects that has recently attracted great experimental efforts. In particular, heavy $N=Z$ nuclei in the mass region $A=80$ are expected to be some of the most deformed ground states which have been found [1] in mid-mass nuclei, typically $8p-8h,12p-12h$ for e.g. the cases of $^{76}$Sr, $^{80}$Zr. This strong enhancement of...
Shell evolution in the region around the magic numbers $N=28$ and $Z=20$ is of great interest in nuclear structure physics. Moving away from the doubly-magic isotope $^{48}$Ca, in the neutron-rich direction there is evidence of an emergent shell gap at $N=34$ [1], and in the proton-deficient direction, the onset of shape deformation suggests a weakening of the $N=28$ magic number [2]. The...
Short half-lives, low production rates and the need to produce them by fusion-evaporation reactions all complicate laser spectroscopy studies of (trans)actinides. The In-Gas Laser Ionization and Spectroscopy (IGLIS) technique has been succesfully employed in studies on short-lived actinides (see for instance [1,2]). The addition of a convergent-divergent (de Laval) nozzle to create a cold...
At the RIKEN Radioactive Isotope Beam Factory, the spin-isospin response of $^{11}$Li was measured in charge-exchange $(p,n)$ reaction at 182 MeV/nucleon beam energy. There is no available data for isovector spin-flip giant resonances in nuclei with large isospin asymmetry factors, where (N−Z)/A>0.25 [1]. Our work aims to investigate this unexplored region up to (N−Z)/A=0.5.
The...
Using covariant energy density functional approach, it was recently possible to describe alpha decay, on both medium mass and heavy nuclei [1]. Using the same formalism, a new mode of radioactivity was predicted [2]. In such a mode, 2 alpha particles are emitted back-to-back, contrary to a 8Be-like cluster mode. Cluster decay will also be analyzed with this approach [3].
Information brought...
A long-lived isomeric state in $^{36}$Al has been identified for the first time via $\beta$-decay of $^{36}$Mg and $^{36}$Al. Neutron-rich $^{36}$Mg and $^{36}$Al were produced at the Facility for Rare Isotope Beams(FRIB) via projectile fragmentation of a $^{48}$Ca beam of energy 172.3 $\text{MeV/u}$. The beam was impinged on a 8.89 mm thick $^{9}$Be target. The fragmented beam was delivered...
Investigation of negative-parity band in $^{130}$Cs
C. Majumder$^{1}$, Pragya Das$^{1,*}$, H. K. Singh$^{1}$, U. Lamani$^{1}$, B. Bhujang$^{1,\#}$, and V. Pasi$^{1,\dagger}$
$^{1}$Department of Physics, Indian Institute of Technology Bombay, Mumbai, India.
$^{\#}$Present address: Govt. PU College, Shiggaon - 581205, Karnataka, India.
$^{\dagger}$Present address: Feat Educational Ventures...
Nuclear electromagnetic moments provide essential information in our understanding of nuclear structure. Observables such as electric quadrupole moments are highly sensitive to collective nuclear phenomena, whereas magnetic dipole moments offer sensitive probes to test our description of microscopic properties such as those of valence nucleons. Although great progress was achieved in the...
T. Moriguchi$^1$, R. Kagesawa$^1$, A. Ozawa$^1$, W. Horiuchi$^2$, Y. Abe$^3$, M. Amano$^1$, D. Kamioka$^1$, A. Kitagawa$^4$, M. Mukai$^3$, D. Nagae$^5$, M. Sakaue$^6$, S. Sato$^4$, B. H. Sun$^7$, S. Suzuki$^8$, T. Suzuki$^6$, T. Yamaguchi$^6$, A. Yano$^1$, K. Yokota$^6$
$^1$University of Tsukuba, $^2$Osaka Metropolitan University, $^3$RIKEN Nishina Center, $^4$National Institutes for...
Most of the knowledge we have to date about Short-Range Correlations (SRC) in nuclei comes from electron induced quasi-free scattering (QFS) experiments in large momentum transfer kinematics. Experiments performed at Jefferson Lab with a $^{12}$C nucleus showed that the high-momentum tail of the nuclear momentum distribution is dominated by SRC and that the neutron/proton pairs are about 20...
During the routine operation of radioactive heavy-ion beam facilities, tremendous quantities of radioisotopes get deposited or produced at multiple sites throughout the accelerator parts and beamline components. This presents an opportunity to harvest the long-lived radioisotopes that have wide ranging applications once these components and parts are decommissioned and often, considerable...
Experimental data have shown that far from the valley of stability the nuclear shell structure evolves. New magic numbers can emerge and the traditional ones can disappear. In particular, two new magic numbers at N=32 and N=34 have been suggested in the vicinity of Z=20 based on gamma-ray spectroscopy and mass measurements. In order to assess the impact of a single valence proton outside of...
The rapid neutron capture process (r-process) is considered to be responsible for the synthesis of about one-half of the elements heavier than iron up to bismuth and all of thorium and uranium. To model the r-process, nuclear properties of neutron-rich nuclides are needed. Nuclear mass is one of the most important input properties for the r-process calculation. However, some of the...
Commissioning of the Facility for Rare Isotope Beams (FRIB) in-flight separator system Advanced Rare Isotope Separator, ARIS, began in early 2022. The system consists of up to three stages of achromatic separation based on large superconducting magnets and can deliver beams to various experimental stations for nuclear and astrophysics studies, as well as other societal needs. ARIS is designed...
Neutrinos are produced as a result of the nuclear fusion reactions happening inside the Sun. Precise measurement of the solar neutrino flux is crucial for a better understanding of the various nuclear reactions taking place in the Sun but also gives us important information about the Sun's core [1]. The geochemical experiment LOREX (LORandite EXperiment) [2], proposed by Freedman and...
Nuclei along N=20 provide an excellent region to investigate the change in nuclear structure and interactions. From their evolution from the doubly magic nucleus $^{40}$Ca through to the Z=16 and Z=14 nuclei $^{36}$S and $^{34}$Si, respectively, to $^{32}$Mg with a deformed $2p-2h$ intruder ground state [1]. The mechanism responsible for the change in shell structure is not well understood and...
High-resolution laser spectroscopy has been proven to be a powerful tool to extract nuclear structure data in an nuclear-model-independent manner. The isotope shift which can be extracted from the hyperfine spectra gives direct access to changes in mean-square charge radii, while the extracted hyperfine parameters give access to the nuclear spin, nuclear magnetic dipole moment and electric...
The $N=20$ "island of inversion" is a neutron-rich region of the nuclear chart which is of particular importance for understanding the evolution of nuclear structure. In this region, deformed intruder configurations (particle-hole excitations) dominate at ground-state and low-excitation energies which is facilitated by the weakening of the $N=20$ shell closure. Additionally this shell gap...
We present results of a laser spectroscopy experiment on the hyperfine splitting of hydrogen-like $^{208}$Bi$^{82+}$ at the Experimental Storage Ring (ESR) at the GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt. This is the first time that an artificially produced isotope is successfully targeted by laser spectroscopy in a storage ring.
During the campaign in May 2022, the ions of...
The size of an atomic nucleus is a fundamental observable and can be used to benchmark nuclear structure theory and therefore test our fundamental knowledge of matter. In contrast to matter and neutron radii, the nuclear charge radius can be probed through the well-known electromagnetic interaction. Typically, charge radii of stable nuclei are extracted from elastic electron scattering or...
A novel approach to produce medically important radionuclides using inverse kinematics [1-3] has been developed at the Cyclotron Institute at Texas A&M University. The methodology involves a heavy-ion beam of appropriate energy impinging on a light gas target (e.g., $H_{2}$, $D_{2}$, $^{3-4}$He, …) and collecting the isotope of interest, focused along the beam direction, on a foil catcher...
We report on studies of `$^{14}$B and $^{10}$Li using the (t,p) reaction in inverse kinematics with HELIOS at Argonne National Laboratory. Two-neutron transfer provides information complementary to that obtained with one-neutron transfer. The selective nature of (t,p) is ideal for studying neutron pairing, configuration mixing and shape-coexistence, effects necessary to understand regions...
The medical radioisotope Ac-225 is produced at a handful of accelerator facilities by high energy proton irradiation of thorium-based targets. The current standard separation protocol of this isotope and its generator parent Ra-225 from irradiated targets is based on radiochemistry. This method can recover Ac-225 and Ra-225 with high radiochemical yields of >90%. Nonetheless, a major issue is...
Recent observations of metal-poor star elemental and isotopic abundances [Roe22, Wen18] have sparked new interest in the nucleosynthesis of elements around the second r-process abundance peak, as it may shed light on the r-process conditions. To understand the r-process conditions and link these observations to astrophysical models, it is crucial to have information on the nuclear...
The experimental information available to test shell-model calculations south of 208Pb is almost non-existent at present due to the challenges in accessing the exotic neutron-rich region around and beyond N=126. Such information are essential not only for understanding how the shell structure evolves below and beyond N=126, and if deformation or new shell gaps develop in the region, but to...
The research potential of radioactive molecules for both fundamental and applied science has recently been recognized [1,2] and significant progress has been marked at ISOLDE on both the production [3] and the spectroscopy [4-7] of radioactive molecules.
In addition to the first laser spectroscopy of RaF at the collinear resonance ionization spectroscopy (CRIS) experiment [4,5] and its...
Rapid shape transitions are predicted by the shell model calculations as a result of the nuclear shell structure significantly evolving in the neutron-rich region at the traditional magic numbers N=20 and 28. The energy ratios between the first 2+ and 4+ states in the even-even silicon isotopes from N=20 to 28 suggest a variety of collectivity evolving from vibrational, to possible triaxial,...
Muonic x-ray spectroscopy is a technique that utilizes the properties of the muon to obtain information about the structure of the atom and the nucleus. When a muon interacts with an atom, it can be captured in a high principal atomic quantum number state, after which it will fall towards the ground state emitting high energy characteristic x rays. Due to the heavy mass of muons compared to...
We investigate outer crust compositions for a wide range of pressures (densities) and magnetic-field strengths, adopting the latest experimental masses (AME2020) supplemented with various theoretical mass models. By exploring the optimal composition of nuclei in the entire nuclear chart, we find emergence of neutron-rich heavy nuclei, which are much heavier than previously thought (that was at...
The $^3$He$(\alpha,\gamma)^7$Be reaction is an important part of ongoing processes occurring in stars like our very own sun. In the fusion reaction network of the sun, the $^3$He$(\alpha,\gamma)^7$Be reaction is key to determining the $^7$Be and $^8$B neutrino fluxes resulting from the pp-II chain . In standard solar model (SSM) predictions of these neutrino fluxes, the low-energy...
A study of reaction mechanisms involved in the production of alpha particles in reactions induced by a 6He radioactive beam on a 9Be target nuclei is presented. Experimental data [1] was obtained using the RIBRAS (Radioactive Ion Beams in Brasil) facility of the Institute of Physics of the University of São Paulo, Brazil [2-4]. It is the first RIB facility in the southern hemisphere and is...
The neutron lifetime discrepancy between beam and bottle experiments of 4$\sigma$ could be interpreted as a possible sign of the neutron into dark particles [1]. If such a decay exists, it could also occur in unstable nuclei with sufficiently low neutron binding energy, a quasi-free neutron decay into a dark matter particle $\chi$; as is the case of $^6$He with S$_{2n} = 975.45keV < m_n -...
The nuclear binding energy arises from various effects that govern nuclear properties. Different nucleon configurations within nuclear isomers lead to modified binding energies, often resulting in mass differences of tens to hundreds of kilo-electronvolts. These isomeric excitation energies can be directly accessed by measuring the difference in atomic masses of ground and isomeric states....
Considering its weakly-bound nature, a complete description of deuteron-induced reactions remains a challenging problem for theoretical studies. To examine this problem, we perform a systematic analysis of inclusive nucleon emission cross sections for deuterons incident on a wide range of nuclei at different energies up to 100 MeV. The local-energy approximation to the post form DWBA is used...
TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN) operates several ion traps for high-precision mass measurements and spectroscopy. Among these traps is a Multi-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF-MS) for mass measurement and isotope selective cleaning of beam for other traps. TITAN's MR-TOF-MS has demonstrated excellent dynamic range ($\sim10^8$) and high-precision...
Multi-reflection time-of-flight (MRTOF) mass spectrometry [1] has become a new powerful tool for fast and precise measurements of atomic masses. It is a breakthrough-technology considering the required duration of a measurement and the small number of rare events needed to reach a relative mass precision of $\delta m/m \leq 10^{-7}$. This mass spectrometry technology has been developed at...
The focus of this work is on the Fe and Mn neutron-rich isotopes with $N\sim40$, which lie within one of the so-called Islands of Inversion. Here, a quenching of the $N=40$ shell gap allows deformation to develop in the ground-state configurations. Limited spectroscopic information is available in the region of $N\sim40$ below the Ni isotopes. For the even-even nuclei, this consists of...
Quantum shell effects stabilize heavy nuclei against spontaneous fission, making the existence of superheavy elements possible. Direct mass measurements performed with Penning traps provide information on the nuclear shell structure via binding energies, as well as excitation energies of low-lying, long-lived isomers obtained from the directly measured masses.
The SHIPTRAP experiment is...
(1) Department of Physics and Astronomy, Michigan State University, East-Lansing, MI, USA
(2) National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI, USA
(3) Department of Physics, Wittenberg University, Springfield, OH, USA
(4) Department of Chemistry, Michigan State University, East Lansing, MI, USA
(5) Facility for Rare Isotope Beams, Michigan State...
The term ‘island of inversion’ is used to refer to a region of the nuclear landscape in which deformed intruder configurations dominate nuclear ground states over the spherical configurations naively expected from the shell model. Theoretical models of the inversion mechanism can be tested through detailed studies of the nuclear structure of transitional nuclei, in which the normal and...
Systematic study of the masses of exotic nuclei far from the valley of stability reveals interesting phenomena such as new decay models, disappearance of traditional shell gaps and emergence of new magic numbers, and breakdown of isospin symmetry. With the advent of the new radioactive ion beam facilities built worldwide, numerous projects of mass measurements of short-lived nuclei have been...
Potassium-40 (40K) is a naturally-occurring radioactive isotope. It is a background in searches for exotic subatomic particles, plays a role in geochronology, and has a nuclear structure of interest to theorists. This radionuclide decays mainly by beta emission to calcium, and by electron-capture to an excited state of argon. The electron-capture decay of 40K directly to the ground state of...
The Resonance Ionization Laser Ion Source (RILIS) has been the principal ion source at ISOLDE for the majority of the past three decades. Unmatched selectivity, coupled to high efficiency, has been the main reason for RILIS being requested in more than half of the proposals submitted for review to the ISOLDE scientific committee (INTC). What started as a home-made system of 3 tunable dye...
In the A = 100 region, the dramatic shape change observed for Zr [1-3] and Sr [4-7] (Z = 40 and 38, respectively) is not present in Kr (Z = 36) isotopes [8-10]. The $2_{1}^+$ energies and the B(E2; $2_{1}^+$→ $0_{1}^+$) values vary smoothly across the Kr isotopes but Sr and Zr isotopes display a large jump at N = 60, indicating a significant increase in the ground state deformation of...
Frank Wienholtz for the PUMA collaboration
The main goal of the PUMA [1] (antiProton Unstable Matter Annihilation) experiment is to use antiprotons as a tool to investigate properties of exotic nuclei. For this, antiprotons produced at the AD/CERN and decelerated by the ELENA storage ring will be captured, cooled and transported to the ISODLE facility where the antiprotons will be mixed with...
The first experimental campaigns with FRIB Decay Station Initiator [1] at FRIB focused on the spectroscopy of very neutron-rich isotopes. They provided a wealth of data on beta-delayed neutron emitters. We will present the first results on the beta-delayed neutron emission spectroscopy near N=28 shell closure, such as ${}^{45,46,47}$Cl. Using a combination of neutron and gamma-ray data, we...
Radiation-detected Nuclear Magnetic Resonance (RD-NMR), especially in the form of beta-NMR in solids hosts, is an extremely sensitive NMR approach, which has been used in nuclear structure studies over the last few decades, allowing to determine magnetic and quadrupole moments of selected unstable nuclei.
RD-NMR applications in chemistry, biology, or medical diagnosis – performed on...
Located at the neutron drip-line, $^{24}O$ is the heaviest doubly-magic isotope of the oxygen isotopic chain. As the $Q_\beta$ value increases and the neutron separation energy in the daughter nucleus decreases for the neutron-rich nucleus, beta-delayed neutron emission becomes a dominant decay mode, and neutron energy measurement is vital in studying the beta decay to the neutron unbound...
The isospin formalism describes protons and neutrons as two projections of the nucleon and provides a powerful tool for identifying and classifying states in the vicinity of the line of $N=Z$. Under the assumption that isospin is a good quantum number, a number of relations arise to describe isobaric analogue states their properties. This provides access wealth of information, from tests of...
Nuclear charge-exchange reactions can be used to estimate the electron-capture rates which are key quantities in various astrophysical scenarios, such as the final evolution of intermediate-mass stars, core-collapse supernovae (CCSN), cooling of the neutron star crust, and nucleosynthesis in thermonuclear supernovae. Over the past decades, great progress has been made to constrain...
The $^{10}$Be(t,p)$^{12}$Be reaction has been studied with the SOLARIS solenoidal spectrometer. This measurement was carried out in inverse kinematics using a 9.6 MeV/u $^{10}$Be beam provided by the ReA6 re-accelerator in stand-alone mode. SOLARIS provides excellent resolution (about 150 keV FWHM) and background rejection capabilities via recoil detection. A titanium tritide target was used....
