Publications (43)
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…
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 the First Excited State in 23O
N. Frank, A. Schiller, T. Baumann +12
The first excited state in neutron-rich 23O was observed in a (2p1n) knock-out reaction from 26Ne on a beryllium target at a beam energy of 86 MeV/A. The state is unbound with resp…
Study of multi-neutron systems with SAMURAI spectrometer
Z. H. Yang, F. M. Marqués, N. L. Achouri +95
The tetraneutron has been drawing the attention of the nuclear physics community for decades, but a firm conclusion on its existence and properties is still far from being reached…
Coulomb excitation of Ni at safe energies
N. Bree, I. Stefanescu, P. A. Butler +29
The value in Ni has been measured using Coulomb excitation at safe energies. The Ni radioactive beam was post-accelerated at the ISOLDE facility (CE…
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…
Spectroscopy of Mg with knockout reactions
D. Bazin, N. Aoi, H. Baba +16
The structure of Mg was investigated by means of two knockout reactions, one-neutron removal from Mg and one-proton removal from Al. Using comparative analysis…
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…
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…
Structural evolution in the neutron-rich nuclei 106Zr and 108Zr
T. Sumikama, K. Yoshinaga, H. Watanabe +44
The low-lying states in 106Zr and 108Zr have been investigated by means of β-γ and isomer spectroscopy at the RI beam factory, respectively. A new isomer with a half-life of 620\…
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…
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…
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…
Collectivity evolution in the neutron-rich Pd isotopes towards the N=82 shell closure
H. Wang, N. Aoi, S. Takeuchi +29
The neutron-rich, even-even 122,124,126Pd isotopes has been studied via in-beam gamma-ray spectroscopy at the RIKEN Radioactive Isotope Beam Factory. Excited states at 499(9), 590(…
Potential and limitations of nucleon transfer experiments with radioactive beams at REX-ISOLDE
C. Gund, H. Bauer, J. Cub +8
As a tool for studying the structure of nuclei far off stability the technique of gamma-ray spectroscopy after low-energy single-nucleon transfer reactions with radioactive nuclear…
Photoneutron reactions on gold in the giant dipole resonance region: reaction cross sections and average kinetic energies of photoneutrons
I. Gheorghe, T. Ari-izumi, S. Goriely +12
In this work, we present new data on the Au photoneutron reactions in and above the giant dipole resonance region, obtained by using 8 to 39~MeV quasi-monochromatic -ra…
Measurement of E2 Transitions in the Coulomb Dissociation of 8B
B. Davids, D. W. Anthony, Sam M. Austin +11
In an effort to understand the implications of Coulomb dissociation experiments for the determination of the 7Be(p,gamma)8B reaction rate, longitudinal momentum distributions of 7B…
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…
Well-developed deformation in 42Si
S. Takeuchi, M. Matsushita, N. Aoi +40
Excited states in 38,40,42Si nuclei have been studied via in-beam gamma-ray spectroscopy with multi-nucleon removal reactions. Intense radioactive beams of 40S and 44S provided at…
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…
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…
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 $2…
Large amplification of the isospin-dependence of proton emitting source size in radioactive heavy-ion collisions: a signal of n-p correlation
Y. J. Wang, C. K. Tam, Z. G. Xiao +64
We report proton-proton correlation function measurements in central Sn+Sn and Sn+Sn collisions at 270 MeV/nucleon. The proton emitting source sizes…
Photoneutron cross section measurements on Pb in the Giant Dipole Resonance region
I. Gheorghe, S. Goriely, N. Wagner +16
Photoneutron reactions on Pb in the Giant Dipole Resonance energy region have been investigated at the -ray beam line of the NewSUBARU facility in Japan. The measuremen…
Probing the Z = 6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions
I. Syndikus, M. Petri, A. O. Macchiavelli +76
The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic i…
Constraining nucleon effective masses with flow and stopping observables from the SRIT experiment
C. Y. Tsang, M. Kurata-Nishimura, M. B. Tsang +52
Properties of the nuclear equation of state (EoS) can be probed by measuring the dynamical properties of nucleus-nucleus collisions. In this study, we present the directed flow ($v…
Quasiclassical description of bremsstrahlung accompanying alpha decay including quadrupole radiation
U. D. Jentschura, A. I. Milstein, I. S. Terekhov +3
We present a quasiclassical theory of alpha decay accompanied by bremsstrahlung with a special emphasis on the case of 210Po, with the aim of finding a unified description that inc…
Population of neutron unbound states via two-proton knockout reactions
N. Frank, T. Baumann, D. Bazin +12
The two-proton knockout reaction 9Be(26Ne,O2p) was used to explore excited unbound states of 23O and 24O. In 23O a state at an excitation energy of 2.79(13) MeV was observed. There…
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…
Spectroscopy of 32Ne and the Island of Inversion
P. Doornenbal, H. Scheit, N. Aoi +51
We report on the first spectroscopic study of the N=22 nucleus 32Ne at the newly completed RIKEN Radioactive Ion Beam Factory. A single gamma-ray line with an energy of 722(9) keV…
Exploring the "Island of Inversion" by in-beam gamma-ray spectroscopy of the neutron-rich sodium isotopes 31,32,33Na
P. Doornenbal, H. Scheit, N. Kobayashi +14
The structure of the neutron rich sodium isotopes 31,32,33Na was investigated by means of in-beam gammaray spectroscopy following one-neutron knockout and inelastic scattering of r…
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…
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…
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…
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…
Selective population and neutron decay of the first excited state of semi-magic O-23
A. Schiller, N. Frank, T. Baumann +14
We have observed an excited state in the neutron-rich semi-magic nucleus O-23 for the first time. No such states have been found in previous searches using gamma-ray spectroscopy.…
Bremsstrahlung in alpha-Decay Reexamined
H. Boie, H. Scheit, U. D. Jentschura +5
A high-statistics measurement of bremsstrahlung emitted in the alpha decay of 210Po has been performed, which allows to follow the photon spectra up to energies of ~ 500 keV. The m…
"Safe" Coulomb Excitation of 30Mg
O. Niedermaier, H. Scheit, V. Bildstein +9
We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient gamma spectrometer MI…
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…
Exploring Neutron-Rich Oxygen Isotopes with MoNA
N. Frank, T. Baumann, D. Bazin +12
The Modular Neutron Array (MoNA) was used in conjunction with a large-gap dipole magnet (Sweeper) to measure neutron-unbound states in oxygen isotopes close to the neutron dripline…