Publications (68)
Magicity versus superfluidity around O viewed from the study of F
J. Kahlbow, T. Aumann, O. Sorlin +84
The neutron-rich unbound fluorine isotope F has been observed for the first time by measuring its neutron decay at the SAMURAI spectrometer (RIBF, RIKEN) in the quasi…
FAIR Commissioning - Towards First Science
S. Reimann, H. Albers, R. W. Assmann +16
The international Facility for Antiproton and Ion Research (FAIR) is under construction at the GSI Helmholtz Centre in Darmstadt. The first project stage includes the superconducti…
Systematic investigation of projectile fragmentation using beams of unstable B and C isotopes
R. Thies, A. Heinz, T. Adachi +119
Background: Models describing nuclear fragmentation and fragmentation-fission deliver important input for planning nuclear physics experiments and future radioactive ion beam facil…
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…
Isospin dependent multifragmentation of relativistic projectiles
R. Ogul, A. S. Botvina, U. Atav +57
The N/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer at the GSI Schwerionen Synchrotron (SIS). Stable and r…
Bipartite graph partitioning and data clustering
H. Zha, X. He, C. Ding +2
Many data types arising from data mining applications can be modeled as bipartite graphs, examples include terms and documents in a text corpus, customers and purchasing items in m…
Femtoscopy Measurement with SRIT TPC in Radioactive BeamHeavy-ion Collisions
Y. J. Wang, C. K. Tam, Z. G. Xiao +64
Femtoscopy is a powerful tool for exploring the dynamic emitting structure in heavy-ion collisions, while radioactive beam heavy-ion collisions enable the investigation of nuclear…
Weakly Bound Neutron-Rich Nuclei and Cosmic Phenomena
Ushasi Datta, A. Rahaman, S. Chakraborty +38
The single particle and bulk properties of the neutron-rich nuclei constrain fundamental issues in nuclear physics and nuclear astrophysics like the limits of existence of quantum…
The ASY-EOS experiment at GSI: investigating the symmetry energy at supra-saturation densities
P. Russotto, M. Chartier, E. De Filippo +89
The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich heavy-ions systems at intermediate energies has been proposed as an observable sensitive to…
Tracing a phase transition with fluctuations of the largest fragment size: Statistical multifragmentation models and the ALADIN S254 data
T. Pietrzak, P. Adrich, T. Aumann +54
A phase transition signature associated with cumulants of the largest fragment size distribution has been identified in statistical multifragmentation models and examined in analys…
Structure of 55Ti from relativistic one-neutron knockout
P. Maierbeck, R. Gernhäuser, R. Krücken +62
Results are presented from a one-neutron knockout reaction at relativistic energies on 56Ti using the GSI FRS as a two-stage magnetic spectrometer and the Miniball array for gamma-…
Coulomb breakup of neutron-rich Na isotopes near the island of inversion
A . Rahaman, Ushasi Datta, T. Aumann +50
First results are reported on the ground state configurations of the neutron-rich Na isotopes, obtained via Coulomb dissociation (CD) measurements as a method of the dire…
Letter of Intent: A New QCD facility at the M2 beam line of the CERN SPS (COMPASS++/AMBER)
B. Adams, C. A. Aidala, R. Akhunzyanov +263
A New QCD facility at the M2 beam line of the CERN SPS COMPASS++/AMBER
Symmetry energy investigation with pion production from Sn+Sn systems
G. Jhang, J. Estee, J. Barney +77
In the past two decades, pions created in the high density regions of heavy ion collisions have been predicted to be sensitive at high densities to the symmetry energy term in the…
Results of the ASY-EOS experiment at GSI: The symmetry energy at suprasaturation density
P. Russotto, S. Gannon, S. Kupny +89
Directed and elliptic flows of neutrons and light charged particles were measured for the reaction 197Au+197Au at 400 MeV/nucleon incident energy within the ASY-EOS experimental ca…
Beyond the Neutron Drip-Line: The Unbound Oxygen Isotopes 25O and 26O
C. Caesar, J. Simonis, T. Adachi +121
The very neutron-rich oxygen isotopes 25O and 26O are investigated experimentally and theoret- ically. In this first R3B-LAND experiment, the unbound states are populated at GSI vi…
New Test of Modulated Electron Capture Decay of Hydrogen-Like Pm Ions: Precision Measurement of Purely Exponential Decay
F. C. Ozturk, B. Akkus, D. Atanasov +92
An experiment addressing electron capture (EC) decay of hydrogen-like Pm ions has been conducted at the experimental storage ring (ESR) at GSI. The decay appears to…
Border of the Island of Inversion: Unbound states in Ne
M. Holl, S. Lindberg, A. Heinz +89
The nucleus Ne is situated at the border of the island of inversion. Despite significant efforts, no bound low-lying intruder -state, which would place Ne fi…
Deep excursion beyond the proton dripline. I. Argon and chlorine isotope chains
I. Mukha, L. V. Grigorenko, D. Kostyleva +45
The proton-unbound argon and chlorine isotopes have been studied by measuring trajectories of their decay-in-flight products by using a tracking technique with micro-strip detector…
Spectroscopy of excited states of unbound nuclei Ar and Cl
X. -D. Xu, I. Mukha, L. V. Grigorenko +45
Several states of proton-unbound isotopes Ar and Cl were investigated by measuring their in-flight decay products, S+proton+proton and S+proton, respect…
Isotopic Dependence of the Nuclear Caloric Curve
The ALADIN2000 Collaboration, C. Sfienti, P. Adrich +54
The A/Z dependence of projectile fragmentation at relativistic energies has been studied with the ALADIN forward spectrometer at SIS. A stable beam of 124Sn and radioactive beams o…
Nuclear matter distributions in the neutron-rich carbon isotopes C from intermediate-energy proton elastic scattering in inverse kinematics
A. V. Dobrovolsky, G. A. Korolev, S. Tang +25
The absolute differential cross sections for small-angle proton elastic scattering off the nuclei C have been measured in inverse kinematics at energies near 700 MeV/u…
The dipole strength distribution of He and decay characteristics
C. Lehr, T. Aumann, M. Duer +91
The weak binding and spatially extended neutron densities characteristic of drip-line nuclei give rise to a distinctive low-energy dipole response. The drip-line nucleus He is…
Extending the Southern Shore of the Island of Inversion to F
A. Revel, O. Sorlin, F. M. Marques +89
Detailed spectroscopy of the neutron-unbound nucleus F has been performed for the first time following proton/neutron removal from Ne/F beams at energies aroun…
Longitudinal momentum distributions of {16,18}C fragments after one-neutron removal from {17,19}C
T. Baumann, H. Geissel, H. Lenske +30
The fragment separator FRS at GSI was used as an energy-loss spectrometer to measure the longitudinal momentum distributions of {16,18}C fragments after one-neutron removal reactio…
Spectroscopy of deeply bound orbitals in neutron-rich Ca isotopes
P. J. Li, J. Lee, P. Doornenbal +85
The calcium isotopes are an ideal system to investigate the evolution of shell structure and magic numbers. Although the properties of surface nucleons in calcium have been well st…
Halo structure of B determined from intermediate energy proton elastic scattering in inverse kinematics
G. A. Korolev, A. V. Dobrovolsky, A. G. Inglessi +24
The absolute differential cross section for small-angle proton elastic scattering on the proton-rich B nucleus has been measured in inverse kinematics for the first time. The e…
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…
\b{eta}-delayed three-proton decay of 31Ar
A. A. Lis, C. Mazzocchi, W. Dominik +38
The beta decay of 31Ar, produced by fragmentation of a 36Ar beam at 880 MeV/nucleon, was investigated. Identified ions of 31Ar were stopped in a gaseous time projection chamber wit…
Neutrons from projectile fragmentation at 600 MeV/nucleon
P. PawÅowski, J. Brzychczyk, N. Buyukcizmeci +33
The neutron emission in projectile fragmentation at relativistic energies was studied with the Large-Area-Neutron-Detector LAND coupled to the ALADIN forward spectrometer at the GS…
Probing the Z = 6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions
I. Syndikus, M. Petri, A. O. Macchiavelli +76
The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic i…
Coincidence measurement of residues and light particles in the reaction 56Fe+p at 1 GeV per nucleon with SPALADIN
E. Le Gentil, T. Aumann, C. O. Bacri +31
The spallation of Fe in collisions with hydrogen at 1 A GeV has been studied in inverse kinematics with the large-aperture setup SPALADIN at GSI. Coincidences of residues wi…
Nuclear astrophysics with radioactive ions at FAIR
R. Reifarth, S. Altstadt, K. Göbel +317
The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those proces…
Discriminant Analysis and Secondary-Beam Charge Recognition
J. Lukasik, P. Adrich, T. Aumann +53
The discriminant-analysis method has been applied to optimize the exotic-beam charge recognition in a projectile fragmentation experiment. The experiment was carried out at the GSI…
Probing the Symmetry Energy with the Spectral Pion Ratio
J. Estee, W. G. Lynch, C. Y. Tsang +60
Many neutron star (NS) properties, such as the proton fraction within a NS, reflect the symmetry energy contributions to the Equation of State that dominate when neutron and proton…
Observation and spectroscopy of proton-unbound nucleus Al
D. Kostyleva, X. -D. Xu, I. Mukha +51
We report on the observation of previously-unknown isotope Al, the first unbound aluminum isotope located beyond the proton dripline. The Al nucleus decays by one-pro…
Isoscaling in central Sn+Sn collisions at 270 MeV/u
J. W. Lee, M. B. Tsang, C. Y. Tsang +61
Experimental information on fragment emissions is important in understanding the dynamics of nuclear collisions and in the development of transport model simulating heavy-ion colli…
Nuclear-matter distribution in the proton-rich nuclei Be and B from intermediate energy proton elastic scattering in inverse kinematics
A. V. Dobrovolsky, G. A. Korolev, A. G. Inglessi +25
Absolute differential cross sections for elastic Be and B small-angle scattering were measured in inverse kinematics at an energy of 0.7 GeV/u at GSI Darmstadt. The hydro…
Effective proton-neutron interaction near the drip line from unbound states in F
M. Vandebrouck, A. Lepailleur, O. Sorlin +107
Background: Odd-odd nuclei, around doubly closed shells, have been extensively used to study proton-neutron interactions. However, the evolution of these interactions as a function…
Towards the Limits of Existence of Nuclear Structure: Observation and First spectroscopy of the Isotope K by measuring its three-proton Decay
D. Kostyleva, I. Mukha, L. Acosta +44
The most-remote from stability isotope K, which is located four atomic mass units beyond the proton drip line, has been observed. It is unbound in respect to three-proton ($…
Strong neutron pairing in core+4n nuclei
A. Revel, F. M. Marques, O. Sorlin +100
The emission of neutron pairs from the neutron-rich isotones C and O has been studied by high-energy nucleon knockout from N and O secondary…
Coulomb excitation of exotic nuclei at the R3B-LAND setup
D. M. Rossi, P. Adrich, F. Aksouh +41
Exotic Ni isotopes have been measured at the R3B-LAND setup at GSI in Darmstadt, using Coulomb excitation in inverse kinematics at beam energies around 500 MeV/u. As the experiment…
Measurement of the 92,93,94,100Mo(g,n) reactions by Coulomb Dissociation
K. Göbel, P. Adrich, S. Altstadt +70
The Coulomb Dissociation (CD) cross sections of the stable isotopes 92,94,100Mo and of the unstable isotope 93Mo were measured at the LAND/R3B setup at GSI Helmholtzzentrum für Sc…
Unperturbed inverse kinematics nucleon knockout measurements with a 48 GeV/c carbon beam
M. Patsyuk, J. Kahlbow, G. Laskaris +166
From superconductors to atomic nuclei, strongly-interacting many-body systems are ubiquitous in nature. Measuring the microscopic structure of such systems is a formidable challeng…
Observation of Tensor-Driven High-Momentum Neutrons in O via () Reactions and Zero-Degree Deuteron Momentum Spectroscopy
X. Wang, H. J. Ong, S. Terashima +42
The reaction has been studied at using 403-, 604-, 907- and 1209-MeV protons, comparing cross sections populating positive- and ne…
Neutron-skin thickness from the study of the anti-analog giant dipole resonance
A. Krasznahorkay, L. Stuhl, M. Csatlós +57
The gamma-decay of the anti-analog of the giant dipole resonance (AGDR) has been measured to the isobaric analog state excited in the p(124Sn,n) reaction at a beam energy of 600 Me…
Approaching the Gamow window with stored ions: Direct measurement of Xe(p,) in the ESR storage ring
J. Glorius, C. Langer, Z. Slavkovská +63
We report the first measurement of low-energy proton-capture cross sections of Xe in a heavy ion storage ring. Xe ions of five different beam energies betwe…
Hypernuclear spectroscopy of products from 6Li projectiles on a carbon target at 2 AGeV
C. Rappold, E. Kim, D. Nakajima +50
A novel experiment, aiming at demonstrating the feasibility of hypernuclear spectroscopy with heavy-ion beams, was conducted. Using the invariant mass method, the spectroscopy of h…
Quasi-free (p,2p) reactions in inverse kinematics for studying the fission yield dependence on temperature
A. Graña-González, J. L. RodrÃguez-Sánchez, J. Benlliure +59
Despite the recent experimental and theoretical progress in the investigation of the nuclear fission process, a complete description still represents a challenge in nuclear physics…
Response of Multi-strip Multi-gap Resistive Plate Chamber
Ushasi Datta, S. Chakraborty, A. Rahaman +12
A prototype of Multi-strip Multi-gap Resistive Plate chamber (MMRPC) with active area 40 cm 20 cm has been developed at SINP, Kolkata. Detailed response of the developed d…
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…
Deep excursion beyond the proton dripline. II. Toward the limits of existence of nuclear structure
L. V. Grigorenko, I. Mukha, D. Kostyleva +47
Prospects of experimental studies of argon and chlorine isotopes located far beyond the proton dripline are studied by using systematics and cluster models. The deviations from the…
Unveiling the Two-Proton Halo Character of 17Ne: Exclusive Measurement of Quasi-free Proton-Knockout Reactions
C. Lehr, F. Wamers, F. Aksouh +62
The proton drip-line nucleus 17Ne is investigated experimentally in order to determine its two-proton halo character. A fully exclusive measurement of the 17Ne(p,2p)16F->15O+p quas…
Neutron recognition in the LAND detector for large neutron multiplicity
P. PawÅowski, J. Brzychczyk, Y. Leifels +61
The performance of the LAND neutron detector is studied. Using an event-mixing technique based on one-neutron data obtained in the S107 experiment at the GSI laboratory, we test th…
Comprehensive investigation of fission yields by using spallation- and (p,2p)-induced fission reactions in inverse kinematics
J. L. RodrÃguez-Sánchez, A. Graña-González, J. Benlliure +66
In the last decades, measurements of spallation, fragmentation and Coulex induced fission reactions in inverse kinematics have provided valuable data to accurately investigate the…
Electron capture of Xe in collisions with H molecules in the energy range between 5.5 MeV/u and 30.9 MeV/u
F. M. Kröger, G. Weber, M. O. Herdrich +63
The electron capture process was studied for Xe colliding with H molecules at the internal gas target of the ESR storage ring at GSI, Darmstadt. Cross section values fo…
First Results on In-Beam gamma Spectroscopy of Neutron-Rich Na and Mg Isotopes at REX-ISOLDE
H. Scheit, O. Niedermaier, M. Pantea +46
After the successful commissioning of the radioactive beam experiment at ISOLDE (REX-ISOLDE) - an accelerator for exotic nuclei produced by ISOLDE - first physics experiments using…
Intruder configurations in Ne at the transition into the island of inversion: Detailed structure study of Ne
H. Wang, M. Yasuda, Y. Kondo +92
Detailed -ray spectroscopy of the exotic neon isotope Ne has been performed for the first time using the one-neutron removal reaction from Ne on a liquid hydrogen…
N/Z Dependence of Projectile Fragmentation
W. Trautmann, P. Adrich, T. Aumann +53
The N/Z dependence of projectile fragmentation at relativistic energies has been studied in a recent experiment at the GSI laboratory with the ALADiN forward spectrometer coupled t…
Direct observation of three-neutron emission from He and the search for the trineutron
S. W. Huang, C. Lenain, Z. H. Yang +107
Three-neutron emission from He has been directly measured for the first time, following neutron knockout from a He beam at 156 MeV/nucleon. A resonance-like structure at $2…
Nuclear Physics Experiments with Ion Storage Rings
Yu. A. Litvinov, S. Bishop, K. Blaum +38
In the last two decades a number of nuclear structure and astrophysics experiments were performed at heavy-ion storage rings employing unique experimental conditions offered by suc…
Large amplification of the isospin-dependence of proton emitting source size in radioactive heavy-ion collisions: a signal of n-p correlation
Y. J. Wang, C. K. Tam, Z. G. Xiao +64
We report proton-proton correlation function measurements in central Sn+Sn and Sn+Sn collisions at 270 MeV/nucleon. The proton emitting source sizes…
Missing-mass spectroscopy of the reaction near the -meson production threshold
Y. K. Tanaka, K. Itahashi, H. Fujioka +51
Excitation-energy spectra of C nuclei near the -meson production threshold have been measured by missing-mass spectroscopy using the C(,) reaction. A…
Constraining nucleon effective masses with flow and stopping observables from the SRIT experiment
C. Y. Tsang, M. Kurata-Nishimura, M. B. Tsang +52
Properties of the nuclear equation of state (EoS) can be probed by measuring the dynamical properties of nucleus-nucleus collisions. In this study, we present the directed flow ($v…
Twin GEM-TPC Prototype (HGB4) Beam Test at GSI - a Development for the Super-FRS at FAIR
F. Garcia, R. Turpeinen, R. Lauhakangas +30
The GEM-TPC detector will be part of the standard Super-FRS detection system, as tracker detectors at several focal stations along the separator and its three branches.
Determination of luminosity for in-ring reactions: A new approach for the low-energy domain
Y. M. Xing, J. Glorius, L. Varga +59
Luminosity is a measure of the colliding frequency between beam and target and it is a crucial parameter for the measurement of absolute values, such as reaction cross sections. In…
Isotopic Dependence of the Caloric Curve
The ALADIN2000 Collaboration, W. Trautmann, P. Adrich +54
Isotopic effects in projectile fragmentation at relativistic energies have been studied with the ALADIN forward spectrometer at SIS. Stable and radioactive Sn and La beams with an…
Determination of the Neutron-Capture Rate of 17C for the R-process Nucleosynthesis
M. Heine, S. Typel, M. -R. Wu +124
With the RB-LAND setup at GSI we have measured exclusive relative-energy spectra of the Coulomb dissociation of C at a projectile energy around 425~AMeV on a lead targ…