Publications (44)
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…
Commissioning of the BRIKEN detector for the measurement of very exotic beta-delayed neutron emitters
A. Tolosa-Delgado, J. Agramunt, J. L. Tain +63
A new detection system has been installed at the RIKEN Nishina Center (Japan) to investigate decay properties of very neutron-rich nuclei. The setup consists of three main parts: a…
Narrow resonances in the continuum of the unbound nucleus F
V. Girard-Alcindor, A. Mercenne, I. Stefan +100
The structure of the unbound F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive O beam impinging on a CH target. The anal…
Performance of The Advanced GAmma Tracking Array at GANIL
J. Ljungvall, R. M. Pérez-Vidal, A. Lopez-Martens +10
The performance of the Advanced GAmma Tracking Array (AGATA) at GANIL is discussed, on the basis of the analysis of source and in-beam data taken with up to 30 segmented crystals.…
AGATA - Advanced Gamma Tracking Array
S. Akkoyun, A. Algora, B. Alikhani +351
The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA is based on the technique of gamma-ray ener…
Probing exotic cross-shell interactions at N=28 with single-neutron transfer on 47K
C. J. Paxman, A. Matta, W. N. Catford +76
We present the first measurement of the K()K transfer reaction, performed in inverse kinematics using a reaccelerated beam of K. The level scheme of $^{…
Re-examining the transition into the N=20 island of inversion: structure of Mg
B. Fernández-DomÃnguez, B. Pietras, W. N. Catford +34
Intermediate energy single-neutron removal from Mg has been employed to investigate the transition into the N=20 island of inversion. Levels up to 5~MeV excitation energy in…
Structure of 12Be: intruder d-wave strength at N=8
S. D. Pain, W. N. Catford, N. A. Orr +21
The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked con…
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…
Emittance Growth in a Plasma Wakefield Accelerator
O. Mete, K. Hanahoe, G. Xia +1
The interaction of the witness beam with the surrounding plasma particles and wakefields was studied. The impli- cations of the elastic scattering process on beam emittance and, em…
Neutron Transfer Studied with a Radioactive beam of 24Ne, using TIARA at SPIRAL
W. N. Catford, C. N. Timis, R. C. Lemmon +7
A general experimental technique for high resolution studies of nucleon transfer reactions using radioactive beams is briefly described, together with the first new physics results…
Discovery of the shape coexisting 0+ state in 32Mg by a two neutron transfer reaction
K. Wimmer, T. Kröll, R. Krücken +36
The Island of Inversion nucleus 32Mg has been studied by a (t,p) two neutron transfer reaction in inverse kinematics at REX-ISOLDE. The shape coexistent excited 0+ state in 32Mg ha…
Spectroscopic studies of Dy-168,170 using CLARA and PRISMA
P. -A. Söderström, J. Nyberg, P. H. Regan +42
Preliminary results from an experiment aiming at Dy-170. Submitted to the LNL Annual Report 2008.
Chronology of the three-body dissociation of He
B. Laurent, F. M. Marqués, C. Angulo +20
The space and time configurations of the dissociation of He into He++, on C and Pb targets, have been explored simultaneously for the first time. The final-state inte…
Impact of newly measured \nobreakdash-delayed neutron emitters around \myisoSimp{78}{Ni} on light element nucleosynthesis in the neutrino-wind following a neutron star merger
A. Tolosa-Delgado, J. L. Tain, M. Reichert +71
Neutron emission probabilities and half-lives of 37 beta-delayed neutron emitters from 75Ni to 92Br were measured at the RIKEN Nishina Center in Japan, including 11 one-neutron and…
Characterizing the atomic mass surface beyond the proton drip line via a-decay measurements of the s1/2 ground state of 165Re and the h11/2 isomer in 161Ta
D. O'Donnell, R. D. Page, C. Scholey +33
The a-decay chains originating from the s1/2 and h11/2 states in 173Au have been investigated following fusion-evaporation reactions. Four generations of a radioactivities have bee…
The detection of neutron clusters
F. M. Marques, M. Labiche, N. A. Orr
A new approach to the production and detection of bound neutron clusters is presented. The technique is based on the breakup of beams of very neutron-rich nuclei and the subsequent…
The Halo of 14Be
M. Labiche, N. A. Orr, F. M. Marques +39
The two-neutron halo nucleus 14Be has been investigated in a kinematically complete measurement of the fragments (12Be and neutrons) produced in dissociation at 35 MeV/nucleon on C…
First spectroscopy of 61Ti and the transition to the Island of Inversion at N = 40
K. Wimmer, F. Recchia, S. M. Lenzi +39
Isomeric states in 59,61Ti have been populated in the projectile fragmentation of a 345 AMeV 238U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed gamm…
High-precision spectroscopy of O benchmarking ab-initio calculations in light nuclei
I. Zanon, E. Clément, A. Goasduff +78
The excited states of unstable O were investigated via -ray spectroscopy following the OO reaction at 8 MeV. By exploiting the Doppler Shift Attenu…
Migration of nuclear shell gaps studied in the d(24Ne,p gamma)25Ne reaction
W. N. Catford, C. N. Timis, R. C. Lemmon +26
The transfer of neutrons onto 24Ne has been measured using a reaccelerated radioactive beam of 24Ne to study the (d,p) reaction in inverse kinematics. The unusual raising of the fi…
Pairing-quadrupole interplay in the neutron-deficient tin nuclei: first lifetime measurements of low-lying states in Sn
M. Siciliano, J. J. Valiente-Dobón, A. Goasduff +67
The lifetimes of the low-lying excited states and have been directly measured in the neutron-deficient Sn isotopes. The nuclei were populated via a deep-ine…
First Exploration of Neutron Shell Structure Below Lead and Beyond
T. L. Tang, B. P. Kay, C. R. Hoffman +26
The nuclei below lead but with more than 126 neutrons are crucial to an understanding of the astrophysical -process in producing nuclei heavier than . Despite their im…
Emergence of the N=16 shell gap in 21O
B. Fernandez-Dominguez, J. S. Thomas, W. N. Catford +39
The spectroscopy of 21O has been investigated using a radioactive 20O beam and the (d,p) reaction in inverse kinematics. The ground and first excited states have been determined to…
TIARA: a large solid angle silicon array for direct reaction studies with radioactive beams
M. Labiche, W. N. Catford, R. C. Lemmon +39
A compact, quasi-4pi position sensitive silicon array, TIARA, designed to study direct reactions induced by radioactive beams in inverse kinematics is described here. The Transfer…
B(E1) Strengths from Coulomb Excitation of 11Be
N. C. Summers, S. D. Pain, N. A. Orr +22
The (E1;) strength for Be has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction m…
ePIC Early Science Report
D. Abbott, N. Abdelrahman, S. Abhijit +781
This Early Science Report from the ePIC Collaboration outlines the compelling physics program achievable during the first years of operation of the Electron-Ion Collider (EIC), pri…
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…
Three-body correlations in Borromean halo nuclei
F. M. Marques, M. Labiche, N. A. Orr
Three-body correlations in the dissociation of two-neutron halo nuclei are explored using a technique based on intensity interferometry and Dalitz plots. This provides for the comb…
The 76Cu conundrum remains unsolved
B. Olaizola, A. Illana, J. Benito +80
Near the doubly-magic nucleus \nuc{Ni}{78} (, ), there has been a decades-long debate on the existence of a long-lived isomer in \nuc{Cu}{76}. A recent mass measurement…
Isomeric states in neutron-rich nuclei around
K. Wimmer, F. Recchia, S. M. Lenzi +37
Neutron-rich nuclei in the vicinity of the island of inversion are characterized by shell evolution and exhibit deformed ground states. In several nuclei isomeric states hav…
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…
First observation of excited states in 173Hg
D. O'Donnell, R. D. Page, C. Scholey +33
The neutron-deficient nucleus 173Hg has been studied following fusion-evaporation reactions. The observation of gamma rays decaying from excited states are reported for the first t…
Spectroscopy of Neutron-Rich 168,170Dy: Yrast Band Evolution Close to the NpNn Valence Maximum
P. -A. Söderström, J. Nyberg, P. H. Regan +52
The yrast sequence of the neutron-rich dysprosium isotope 168Dy has been studied using multi-nucleon transfer reactions following collisions between a 460-MeV 82Se beam and a 170Er…
Testing ab initio nuclear structure in neutron-rich nuclei: lifetime measurements of second 2+ states in 16C and 20O
M. Ciemala, S. Ziliani, F. C. L. Crespi +91
To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2+ state in neutron-rich 20O, tau(2+_2 ) = 150(+80-30) fs, and an estimate for the li…
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…
Single-Proton Removal Reaction Study of 16B
J. -L. Lecouey, N. A. Orr, F. M. Marques +16
The low-lying level structure of the unbound system B has been investigated via single-proton removal from a 35 MeV/nucleon C beam. The coincident detection of the be…
Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich Sb isotopes
S. Biswas, A. Lemasson, M. Rejmund +58
The neutron-rich Sb isotopes were produced as fission fragments in the reaction Be(U,~f) with 6.2 MeV/u beam energy. An unique setup, consisting of AGATA,…
Direct transfer to K as a survey of the interaction
C. J. Paxman, A. Matta, W. N. Catford +76
The collapse of the canonical magic number in nuclei with has drawn significant interest as it relates to the emergence of an island of inversion centered on S…
Fusion of 12C+28Si at deep sub-barrier energies
A. M. Stefanini, G. Montagnoli, M. Del Fabbro +97
The existence of fusion hindrance is not well established in light heavy-ion systems. Studying slightly heavier cases allows extrapolating the trend to light systems of astrophysic…
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…
Shape evolution in even-mass Zr isotopes via lifetime measurements using the -coincidence technique
G. Pasqualato, S. Ansari, J. S. Heines +82
The Zirconium (Z = 40) isotopic chain has attracted interest for more than four decades. The abrupt lowering of the energy of the first state and the increase in the transiti…