Publications (44)
Measurement of excitation spectra in the C reaction near the emission threshold
Y. K. Tanaka, K. Itahashi, H. Fujioka +51
Excitation spectra of C were measured in the C reaction near the emission threshold. A proton beam extracted from the synchrotron SIS-18 at GSI with an i…
Observation of Non-Exponential Orbital Electron Capture Decays of Hydrogen-Like Pr and Pm Ions
Yu. A. Litvinov, F. Bosch, N. Winckler +37
We report on time-modulated two-body weak decays observed in the orbital electron capture of hydrogen-like Pr and Pm ions coasting in an ion storage…
Dipolar effect in coherent spin mixing of two atoms in a single optical lattice site
B. Sun, W. X. Zhang, S. Yi +2
We show that atomic dipolar effects are detectable in the system that recently demonstrated two-atom coherent spin dynamics within individual lattice sites of a Mott state. Based o…
Direct mass measurements of Cd isotopes show strong shell gap at N=82
R. Knöbel, M. Diwisch, F. Bosch +32
A U projectile beam was used to create cadmium isotopes via abrasion-fission at 410 MeV/u in a beryllium target at the entrance of the in-flight separator FRS at GSI. The f…
Light-by-Light Scattering in a Photon-Photon Collider
T. Takahashi, G. An, Y. Chen +10
We studied the feasibility of observing light-by-light scattering in a photon-photon collider based on an existing accelerator complex and a commercially available laser system. We…
Reexamining the temperature and neutron density conditions for r-process nucleosynthesis with augmented nuclear mass models
X. D. Xu, B. Sun, Z. M. Niu +3
We explore the effects of nuclear masses on the temperature and neutron density conditions required for r-process nucleosynthesis using four nuclear mass models augmented by the la…
Schottky mass measurements of heavy neutron-rich nuclides in the element range $70\leZ \le79$ at the ESR
D. Shubina, R. B. Cakirli, Yu. A. Litvinov +42
Storage-ring mass spectrometry was applied to neutron-rich Au projectile fragments. Masses of Lu, Hf, Ta, W, and Re…
Mass measurements of very neutron-deficient Mo and Tc isotopes and their impact on rp process nucleosynthesis
E. Haettner, D. Ackermann, G. Audi +25
The masses of ten proton-rich nuclides, including the N=Z+1 nuclides 85-Mo and 87-Tc, were measured with the Penning trap mass spectrometer SHIPTRAP. Compared to the Atomic Mass Ev…
Approaching the precursor nuclei of the third r-process peak with RIBs
C. Domingo-Pardo, R. Caballero-Folch, J. Agramunt +61
The rapid neutron nucleosynthesis process involves an enormous amount of very exotic neutron-rich nuclei, which represent a theoretical and experimental challenge. Two of the main…
Spectroscopy of -nucleus bound states at GSI and FAIR --- very preliminary results and future prospects ---
H. Fujioka, Y. Ayyad, J. Benlliure +51
The possible existence of η'-nucleus bound states has been put forward through theoretical and experimental studies. It is strongly related to the η' mass at finite density, whic…
Anatomy of a z=6 Lyman-α emitter down to parsec scales: extreme UV slopes, metal-poor regions and possibly leaking star clusters
Matteo Messa, E. Vanzella, F. Loiacono +31
We present a detailed JWST/NIRSpec and NIRCam analysis of a gravitationally-lensed galaxy () at redshift 6.14 magnified by the Hubble Frontier Field galaxy cluster MA…
Observing collapse in two colliding dipolar Bose-Einstein condensates
B. Sun, M. S. Pindzola
We study the collision of two Bose-Einstein condensates with pure dipolar interaction. A stationary pure dipolar condensate is known to be stable when the atom number is below a cr…
First measurement of several -delayed neutron emitting isotopes beyond N=126
R. Caballero-Folch, C. Domingo-Pardo, J. Agramunt +62
The -delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured together with -decay half-lives for 20 isotopes of Au, Hg, Tl, Pb and Bi in…
-decay half-lives and -delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb and Bi, beyond N=126
R. Caballero-Folch, C. Domingo-Pardo, J. Agramunt +58
Previous measurements of -delayed neutron emitters comprise around 230 nuclei, spanning from the He up to La. Apart from Tl, with a minuscul…
Enhancing Irradiation Resistance in Refractory Medium Entropy Alloys with Simplified Chemistry
M. A. Tunes, D. Parkison, B. Sun +12
Refractory High-Entropy Alloys (RHEAs) hold promising potential to be used as structural materials in future nuclear fusion reactors, where W and its alloys are currently leading c…
Measurement of the $β^+$ and orbital electron-capture decay rates in fully-ionized, hydrogen-like, and helium-like Pr ions
Yu. A. Litvinov, F. Bosch, H. Geissel +39
We report on the first measurement of the $β^+$- and orbital electron capture decay rates of Pr nuclei with the most simple electron configurations: bare nuclei, hydrogen-…
Small cancellation and outer automorphisms of Kazhdan groups acting on hyperbolic spaces
I. Chifan, A. Ioana, D. Osin +1
We show that every finite group realizes as the outer automorphism group of an ICC hyperbolic group with Kazhdan property (T). This result complements the well-known theorem of Pau…
Application of the RMF mass model to the r-process and the influence of mass uncertainties
B. Sun, F. Montes, L. S. Geng +3
A new mass table calculated by the relativistic mean field approach with the state-dependent BCS method for the pairing correlation is applied for the first time to study r-process…
EU-Nets: Enhanced, Explainable and Parsimonious U-Nets
B. Sun, P. Liò
In this study, we propose MHEX+, a framework adaptable to any U-Net architecture. Built upon MHEX+, we introduce novel U-Net variants, EU-Nets, which enhance explainability and unc…
Search for η'(958)-nucleus bound states by (p,d) reaction at GSI and FAIR
H. Fujioka, Y. Ayyad, J. Benlliure +51
The mass of the η' meson is theoretically expected to be reduced at finite density, which indicates the existence of η'-nucleus bound states. To investigate these states, we perf…
Exploring the anomaly in the interaction cross section and matter radius of 23O
R. Kanungo, A. Prochazka, M. Uchida +37
New measurements of the interaction cross sections of 22,23O at 900A MeV performed at the GSI, Darmstadt are reported that address the unsolved puzzle of the large cross section pr…
Dynamics of a two-species Bose-Einstein condensate in a double well
B. Sun, M. S. Pindzola
We study the dynamics of a two-species Bose-Einstein condensate in a double well. Such a system is characterized by the intraspecies and interspecies s-wave scattering as well as t…
Entanglement of two interacting bosons in a two dimensional isotropic harmonic trap
B. Sun, M. Pindzola
We compute the pair entanglement between two interacting bosons in a two dimensional (2D)isotropic harmonic trap. The interaction potential is modeled by a 2D regularized pseudo-po…
Low Cross-Talk Optical Addressing of Trapped-Ion Qubits Using a Novel Integrated Photonic Chip
A. S. Sotirova, B. Sun, J. D. Leppard +10
Individual optical addressing in chains of trapped atomic ions requires generation of many small, closely spaced beams with low cross-talk. Furthermore, implementing parallel opera…
NICER monitoring of supersoft X-ray sources
M. Orio, K. Gendreau, M. Giese +9
We monitored four supersoft sources - two persistent ones, CAL 83 and MR Vel, and the recent novae YZ Ret (Nova Ret 2020) and V1674 Her (Nova Her 2021) - with NICER. The two persis…
Missing-mass spectroscopy of the reaction near the -meson production threshold
Y. K. Tanaka, K. Itahashi, H. Fujioka +51
Excitation-energy spectra of C nuclei near the -meson production threshold have been measured by missing-mass spectroscopy using the C(,) reaction. A…
Wreath-like products of groups and their von Neumann algebras II: Outer automorphisms
I. Chifan, A. Ioana, D. Osin +1
Given a countable group , let denote its von Neumann algebra. For a wide class of ICC groups with Kazhdan's property (T), we confirm a conjecture of V.F.R. Jones as…
Discovery and Cross-Section Measurement of Neutron-Rich Isotopes in the Element Range from Neodymium to Platinum at the FRS
J. Kurcewicz, F. Farinon, H. Geissel +46
With a new detector setup and the high-resolution performance of the fragment separator FRS at GSI we discovered 57 new isotopes in the atomic number range of 60: \…
Quantifying error and leakage in an encoded Si/SiGe triple-dot qubit
R. W. Andrews, C. Jones, M. D. Reed +13
Quantum computation requires qubits that satisfy often-conflicting criteria, including scalable control and long-lasting coherence. One approach to creating a suitable qubit is to…
Generating entangled photon pairs from a cavity-QED system
D. L. Zhou, B. Sun, C. P. Sun +1
We propose a scheme for the controlled generation of Einstein-Podosky-Rosen (EPR) entangled photon pairs from an atom coupled to a high Q optical cavity, extending the prototype sy…
Direct observation of long-lived isomers in Bi
L. Chen, P. M. Walker, H. Geissel +40
Long-lived isomers in 212Bi have been studied following 238U projectile fragmentation at 670 MeV per nucleon. The fragmentation products were injected as highly charged ions into t…
New Mass and Lifetime Measurements of Sm Projectile Fragments with Time-Resolved Schottky Mass Spectrometry
Yu. A. Litvinov, F. Bosch, H. Geissel +20
The FRS-ESR facilities at GSI provide unique conditions for precision measurements with stored exotic nuclei over a large range in the chart of nuclides. In the present experiment…
Magnetic Gradient Fluctuations from Quadrupolar Ge in Si/SiGe Exchange-Only Qubits
J. Kerckhoff, B. Sun, B. H. Fong +14
We study the time-fluctuating magnetic gradient noise mechanisms in pairs of Si/SiGe quantum dots using exchange echo noise spectroscopy. We find through a combination of spectral…
Comment on the paper "Search for oscillation of the electron-capture decay probability of Pm" at arXiv:0807.0649v1
Yu. A. Litvinov, F. Bosch, N. Winckler +36
It is argued that orbital electron-capture decays of neutral Pm atoms implanted into the lattice of a solid (LBNL experiment) do not fulfil the constraints of true two-body…
Effects of the triaxial deformation and pairing correlation on the proton emitter 145Tm
J. M. Yao, B. Sun, P. J. Woods +1
The ground-state properties of the recent reported proton emitter 145Tm have been studied within the axially or triaxially deformed relativistic mean field (RMF) approaches, in whi…
Spectral Line Width Broadening from Pair Fluctuation in a Frozen Rydberg Gas
B. Sun, F. Robicheaux
Spectral line width broadening in Rydberg gases, a phenomenon previously attributed to the many-body effect, was observed experimentally almost a decade ago. The observed line widt…
Entanglement between two fermionic atoms inside a cylindrical harmonic trap
B. Sun, D. L. Zhou, L. You
We investigate quantum entanglement between two (spin-1/2) fermions inside a cylindrical harmonic trap, making use of the von Neumann entropy for the reduced single particle densit…
Mass predictions of superheavy nuclei from the systematics of -Decay Energies
Z. Li, B. Sun, C. H. Shen +1
A recent proposed method for -decay energies () [J.M. Dong, W. Zuo, and W. Scheid, Phys. Rev. Lett. \textbf{107}, 012501 (2011)] can reproduce experimental data of superh…
Extreme Ionizing Properties of Metal-Poor, Muv ~ -12 Star Complex in the first Gyr
E. Vanzella, F. Loiacono, M. Messa +38
We report the serendipitous discovery of a faint (M_UV > -12.2), low-metallicity (Z ~ 0.02 Zsun), ionizing source (dubbed T2c) with a spectroscopic redshift of z=6.146. T2c is part…
On the critical competition between singlet exciton decay and free charge generation in non-fullerene-based organic solar cells with low energetic offsets
M. Pranav, A. Shukla, D. Moser +16
In this era of non-fullerene acceptor (NFA) based organic solar cells, reducing voltage losses while maintaining high photocurrents is the holy grail of current research. Recent fo…
Non-invasive, near-field terahertz imaging of hidden objects using a single pixel detector
R. I. Stantchev, B. Sun, S. M. Hornett +4
Terahertz (THz) imaging has the ability to see through otherwise opaque materials. However, due to the long wavelengths of THz radiation (λ=300μm at 1THz), far-field THz imaging…
Atom-photon entanglement generation and distribution
B. Sun, M. S. Chapman, L. You
We extend an earlier model by Law {\it et al.} \cite{law} for a cavity QED based single-photon-gun to atom-photon entanglement generation and distribution. We illuminate the import…
Crucial test for covariant density functional theory with new and accurate mass measurements from Sn to Pa
P. W. Zhao, L. S. Song, B. Sun +2
The covariant density functional theory with the point-coupling interaction PC-PK1 is compared with new and accurate experimental masses in the element range from 50 to 91. The exp…
Numerical study of two-body correlation in a 1D lattice with perfect blockade
B. Sun, F. Robicheaux
We compute the dynamics of excitation and two-body correlation for two-level "pseudoatoms" in a 1D lattice. We adopt a simplified model where pair excitation within a finite range…