Publications (56)
Ni() and Ni() cross sections measured at n_TOF/CERN
C. Lederer, C. Massimi, E. Berthoumieux +112
The cross section of the Ni() reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 reson…
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…
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report
J. Bendavid, F. Caola, V. Ciulli +102
This Report summarizes the proceedings of the 2017 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt with (I) new developments relevant for high precision Standard…
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…
First Proton-Induced Cross Sections on a Stored Rare Ion Beam: Measurement of 118Te(p,γ) for Explosive Nucleosynthesis
F. Dellmann, J. Glorius, Yu. A. Litvinov +75
We present the first nuclear cross-section measurements of (p,γ) and (p,n) reactions on 118Te at energies relevant for the γ-process nucleosynthesis. Absolute cross-section value…
-Process simulations with a modified reaction library
I. Dillmann, T. Rauscher, M. Heil +3
We have performed -process simulations with the most recent stellar cross sections from the "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars" project (vers…
Stellar (n,gamma) cross sections of p-process isotopes PartI: 102Pd, 120Te, 130,132Ba,and 156Dy
I. Dillmann, C. Domingo-Pardo, M. Heil +5
We have investigated the (n,gamma) cross sections of p-process isotopes with the activation technique. The measurements were carried out at the Karlsruhe Van de Graaff accelerator…
Determination of the stellar (n,gamma) cross section of 40Ca with accelerator mass spectrometry
I. Dillmann, C. Domingo-Pardo, M. Heil +11
The stellar (n,gamma) cross section of 40Ca at kT=25 keV has been measured with a combination of the activation technique and accelerator mass spectrometry (AMS). This combination…
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…
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…
Stellar () cross section of Na
E. Uberseder, M. Heil, F. Käppeler +5
The cross section of the Na()Na reaction has been measured via the activation method at the Karlsruhe 3.7 MV Van de Graaff accelerator. NaCl samples were expos…
(n,) Cross Sections of Light p Nuclei -- Towards an Updated Database for the p Process
I. Dillmann, M. Heil, F. Käppeler +3
The nucleosynthesis of elements beyond iron is dominated by the s and r processes. However, a small amount of stable isotopes on the proton-rich side cannot be made by neutron capt…
Investigation of Direct Nuclear Reactions in a Storage Ring Using In-Ring Detection
J. C. Zamora, T. Aumann, S. Bagchi +62
\textbf{Background:} Experiments involving nuclear reactions in a storage ring offer exceptional possibilities for precise measurements in inverse kinematics. These experiments pro…
Experimental (n,) cross sections of the p-process nuclei Se and Sr
I. Dillmann, M. Heil, F. Käppeler +2
The nucleosynthesis of elements beyond iron is dominated by the s and r processes. However, a small amount of stable isotopes on the proton-rich side cannot be made by neutron capt…
Present status of the KADoNiS database
I. Dillmann, R. Plag, M. Heil +2
The "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars" (KADoNiS) project is an online database for experimental cross sections relevant to the process and proce…
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…
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…
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…
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…
Nucleosynthesis in the Early Galaxy
F. Montes, T. C. Beers, J. Cowan +8
Recent observations of r-process-enriched metal-poor star abundances reveal a non-uniform abundance pattern for elements . Based on non-correlation trends between elementa…
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…
New Stellar Cross Sections and The "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars"
I. Dillmann, R. Plag, C. Domingo-Pardo +4
Since April 2005 a regularly updated stellar neutron cross section compilation is available online at http://nuclear-astrophysics.fzk.de/kadonis. This online-database is called the…
KADoNiS- The Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
I. Dillmann, M. Heil, F. Käppeler +3
The "Karlsruhe Astrophysical Database of Nucleosynthesis in Stars" (KADoNiS) project is an online database for experimental cross sections relevant to the s process and p process.…
Efficiency determination of resistive plate chambers for fast quasi-monoenergetic neutrons
M. Röder, Z. Elekes, T. Aumann +17
Composite detectors made of stainless steel converters and multigap resistive plate chambers have been irradiated with quasi-monoenergetic neutrons with a peak energy of 175MeV. Th…
Opportunities for Nuclear Astrophysics at FRANZ
R. Reifarth, L. P. Chau, M. Heil +6
The "Frankfurter Neutronenquelle am Stern-Gerlach-Zentrum" (FRANZ), which is currently under development, will be the strongest neutron source in the astrophysically interesting en…
Measurement and analysis of the Am-243 neutron capture cross section at the n_TOF facility at CERN
TOF Collaboration, E. Mendoza, D. Cano-Ott +129
Background:The design of new nuclear reactors and transmutation devices requires to reduce the present neutron cross section uncertainties of minor actinides. Purpose: Reduce 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…
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…
First measurements of the total and partial stellar cross section to the -process branching-point Se
I. Dillmann, M. Heil, F. Käppeler +7
Although Se represents an important branching in the weak s process, the stellar neutron capture cross sections to this isotope have not yet been measured experimentally. 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…
Time scales of the s process - from minutes to ages
F. Käppeler, S. Bisterzo, R. Gallino +7
A discussion of the time scales in the s process appears to be an approriate aspect to discuss at the occasion of 70th anniversary of Roberto Gallino, the more as this subject has…
The 14C(n,g) cross section between 10 keV and 1 MeV
R. Reifarth, M. Heil, C. Forssen +14
The neutron capture cross section of 14C is of relevance for several nucleosynthesis scenarios such as inhomogeneous Big Bang models, neutron induced CNO cycles, and neutrino drive…
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…
High-energy break-up of 6Li as a tool to study the Big-Bang nucleosynthesis reaction 2H(alpha,gamma)6Li
F. Hammache, M. Heil, S. Typel +24
The recently claimed observations of non-negligible amounts of 6Li in old halo stars have renewed interest in the Big-Bang Nucleosynthesis (BBN) of 6Li. One important ingredient in…
Deformation and sorting of capsules in a T-junction
E. Häner, M. Heil, A. Juel
We study experimentally the motion and deformation of individual capsules transported by a constant volume-flux flow of low Reynolds number, through the T-junction of a channel wit…
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…
Neutron capture measurements at a RIA-type facility
R. Reifarth, R. C. Haight, M. Heil +2
Neutron capture cross sections of unstable isotopes are important for neutron induced nucleosynthesis as well as for technological applications. The Rare Isotope Accelerator (RIA)…
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…
Neutron Capture Cross Sections for the Weak s Process
M. Heil, A. Juseviciute, F. Kaeppeler +3
In past decades a lot of progress has been made towards understanding the main s-process component that takes place in thermally pulsing Asymptotic Giant Branch (AGB) stars. During…
GEANT simulations of neutron capture experiments with a 4p BaF2 detector
M. Heil, R. Reifarth, F. Kaeppeler +8
The goal of this research project is to give quantitative information useful for the design of a g-ray detector to investigate neutron capture (n, g) reactions on radioactive nucle…
Modelling finger propagation in elasto-rigid channels
J. V. Fontana, A. Juel, N. Bergemann +2
We conduct a theoretical study of a two-phase-fluid-structure interaction problem in which air is driven at constant volume flux into a liquid-filled Hele-Shaw channel whose upper…
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…
Neutron activation of natural zinc samples at kT = 25 keV
R. Reifarth, S. Dababneh, M. Heil +4
The neutron-capture cross sections of 64Zn, 68Zn, and 70Zn have been measured with the activation technique in a quasistellar neutron spectrum corresponding to a thermal energy of…
A 4p BaF2 detector for (n,g) cross section measurements at a spallation neutron source
M. Heil, R. Reifarth, M. M. Fowler +7
The quest for improved neutron capture cross sections for advanced reactor concepts, transmutation of radioactive wastes as well as for astrophysical scenarios of neutron capture n…
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…
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…
The stellar (n,gamma) cross section of 62Ni
H. Nassar, M. Paul, I. Ahmad +23
The 62Ni(n,gamma)63Ni(t_1/2=100+-2 yrs) reaction plays an important role in the control of the flow path of the slow neutron-capture (s-) nucleosynthesis process. We have measured…
Fluidisation of yield stress fluids under vibration
A. Garg, N. Bergemann, B. Smith +2
Motivated by the industrial processing of chocolate, we study experimentally the fluidisation of a sessile drop of yield-stress fluid on a pre-existing layer of the same fluid unde…
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…
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…
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…
PINO - a tool for simulating neutron spectra resulting from the 7Li(p,n) reaction
R. Reifarth, M. Heil, F. Käppeler +1
The 7Li(p,n) reaction in combination with a 3.7 MV Van de Graaff accelerator was routinely used at FZK to perform activation as well as time-of-flight measurements with neutrons in…