Publications (53)
High-spin structure in K
P. -A. Söderström, F. Recchia, J. Nyberg +74
High-spin states of K have been populated in the fusion-evaporation reaction C(Si,np)K and studied by means of -ray spectroscopy techniques using on…
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…
Discovery of a new isomeric state in Ni: Evidence for a highly-deformed proton intruder state
A. Dijon, E. Clément, G. De France +26
We report on the observation of a new isomeric state in Ni. We suggest that the newly observed state at 168(1) keV above the first 2 state is a 0 state…
High resolution -ray spectroscopy using GALILEO array
D. Testov, J. J. Valiente-Dobón, D. Mengoni +36
The GALILEO -ray spectrometer has been constructed at the Legnaro National Laboratory of INFN (LNL-INFN). It can be coupled to advanced ancillary devices which allows nuclear s…
Particle Identification at VAMOS++ with Machine Learning Techniques
Y. Cho, Y. H. Kim, S. Choi +45
Multi-nucleon transfer reaction between 136Xe beam and 198Pt target was performed using the VAMOS++ spectrometer at GANIL to study the structure of n-rich nuclei around N=126. Unam…
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…
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,…
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…
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…
Neutron single-particle strength in silicon isotopes: Constraining the driving forces of shell evolution
S. R. Stroberg, A. Gade, J. A. Tostevin +16
Shell evolution is studied in the neutron-rich silicon isotopes 36,38,40 Si using neutron single-particle strengths deduced from one-neutron knockout reactions. Configurations invo…
In-beam -ray spectroscopy of Mg via direct reactions
N. Kitamura, K. Wimmer, T. Miyagi +26
Background: The nucleus Mg ( and ) plays a central role in the so-called "island of inversion" where in the ground states -shell neutrons are promoted to the…
Spectroscopy of P using the one-proton knockout reaction
A. Mutschler, O. Sorlin, A. Lemasson +16
The structure of P was studied with a one-proton knockout reaction at88~MeV/u from a S projectile beam at NSCL. The rays from thedepopulation of excited states i…
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…
Octupole strength in the neutron-rich calcium isotopes
L. A. Riley, D. M. McPherson, M. L. Agiorgousis +17
Low-lying excited states of the neutron-rich calcium isotopes Ca have been studied via -ray spectroscopy following inverse-kinematics proton scattering on a liquid hy…
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…
Evidence for coexisting shapes in Zr through lifetime measurements
Purnima Singh, W. Korten, T. W. Hagen +35
The lifetimes of first excited 2, 4 and 6 states in Zr were measured with the Recoil-Distance Doppler Shift method in an experiment performed at GANIL. Excited s…
Unexpected distribution of strength in the calcium isotopes at =30
H. L. Crawford, A. O. Macchiavelli, P. Fallon +30
The calcium isotopes have emerged as an important testing ground for new microscopically derived shell-model interactions, and a great deal of focus has been directed toward this r…
The Structure of Si and the magicity of the N=20 gap at Z=14
S. Jongile, A. Lemasson, O. Sorlin +20
The structure of Si was studied by a one-neutron knockout reaction from a Si beam at 98.5 MeV/u incident on a Be target. The prompt -rays following the de-e…
AGATA: Gamma-ray tracking in segmented HPGe detectors
P. -A. Söderström, A. Al-Adili, J. Nyberg +3
The next generation of radioactive ion beam facilities, which will give experimental access to many exotic nuclei, are presently being developed. At the same time the next generati…
Performance of the Fully Digital FPGA-based Front-End Electronics for the GALILEO Array
D. Barrientos, M. Bellato, D. Bazzacco +14
In this work we present the architecture and results of a fully digital Front End Electronics (FEE) read out system developed for the GALILEO array. The FEE system, developed in co…
-ray linear polarization measurements and neutron alignment in Ru
Y. Zheng, G. de France, E. Clément +43
Linear polarization measurements have been performed for -rays in Ru produced with the Ni(Ar, )Ru reaction at a beam energy of 111 MeV. Th…
Low-lying level structure of Cu and its implications on the rp process
W-J. Ong, C. Langer, F. Montes +39
The low-lying energy levels of proton-rich Cu have been extracted using in-beam -ray spectroscopy with the state-of-the-art -ray tracking array GRETINA in conjunctio…
Simultaneous investigation of the and decays in Br
A. I. Morales, A. Algora, B. Rubio +55
The decay of the odd-odd nucleus Br has been investigated with the BigRIPS and EURICA setups at the Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center. The…
Spectroscopy of Ti and the systematic behavior of low energy octupole states in Ca and Ti isotopes
L. A. Riley, M. L. Agiorgousis, T. R. Baugher +18
Excited states of the nucleus Ti have been studied, via both inverse-kinematics proton scattering and one-neutron knockout from Ti by a liquid hydrogen target,…
Inverse-kinematics proton scattering on Ca: Determining effective charges using complementary probes
L. A. Riley, M. L. Agiorgousis, T. R. Baugher +15
We have performed measurements of the excitations in the neutron-rich isotopes Ca via inelastic proton scattering on a liquid hydrog…
Valence proton vacancy of the Si ground state
N. Watwood, C. R. Hoffman, B. P. Kay +22
The Si(He,)P reaction was studied in inverse kinematics at 6.3~MeV/. States in P corresponding to the proton single-particle orbitals were id…
Isospin breaking in the Kr and Br mirror system
A. Algora, A. Vitéz-Sveiczer, A. Poves +65
Isospin symmetry is a fundamental concept in nuclear physics. Even though isospin symmetry is partially broken, it holds approximately for most nuclear systems, which makes excepti…
Identification and rejection of scattered neutrons in AGATA
M. ÅenyiÄit, A. Ataç, S. Akkoyun +22
Gamma rays and neutrons, emitted following spontaneous fission of 252Cf, were measured in an AGATA experiment performed at INFN Laboratori Nazionali di Legnaro in Italy. The setup…
Spectroscopy of Na: shell evolution toward the drip line
A. Lepailleur, K. Wimmer, A. Mutschler +40
Excited states in Na have been studied using the -decay of implanted Ne ions at GANIL/LISE as well as the in-beam -ray spectroscopy at the NSCL/S800 facility.…
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.
Shape Coexistence in Zr from a Model-Independent Analysis
N. Marchini, M. Rocchini, M. Zielinska +33
Low-lying states of Zr were investigated via low-energy multi-step Coulomb excitation. From the measured -ray yields, \textcolor{black}{16} reduced \textcolor{black}{E2}…
Abrasion-fission reactions at intermediate energies
M. Bowry, O. B. Tarasov, J. S. Berryman +16
The availability of high-intensity, heavy-ion beams coupled to sensitive, large solid-angleacceptance spectrometers has enabled a detailed examination of the fission fragments prod…
Evidence for enhanced neutron-proton correlations from the level structure of the nucleus Tc
X. Liu, B. Cederwall, C. Qi +69
The low-lying excited states in the neutron-deficient nucleus Tc have been studied via the fusion-evaporation reaction Fe(Ar, )$…
Response of AGATA Segmented HPGe Detectors to Gamma Rays up to 15.1 MeV
F. C. L. Crespi, R. Avigo, F. Camera +38
The response of AGATA segmented HPGe detectors to gamma rays in the energy range 2-15 MeV was measured. The 15.1 MeV gamma rays were produced using the reaction d(11B,ng)12C at Ebe…
Precision Tests of Isospin Symmetry through Coulomb excitation of A = 62 Nuclei
K. Wimmer, T. Hüyük, S. M. Lenzi +24
Isospin symmetry in the mass system was investigated through Coulomb excitation reactions at the RIKEN Radioactive Isotope Beam Factory. Beams of Zn, Ga, and $…
The Large Enriched Germanium Experiment for Neutrinoless Double Beta Decay (LEGEND)
LEGEND Collaboration, N. Abgrall, A. Abramov +230
The observation of neutrinoless double-beta decay (0) would show that lepton number is violated, reveal that neutrinos are Majorana particles, and provide information on ne…
Evidence for a spin-aligned neutron-proton paired phase from the level structure of Pd
B. Cederwall, F. Ghazi Moradi, T. Bäck +54
The general phenomenon of shell structure in atomic nuclei has been understood since the pioneering work of Goeppert-Mayer, Haxel, Jensen and Suess.They realized that the experimen…
Evolution of the nuclear spin-orbit splitting explored via the Si(,)Si reaction using SOLARIS
J. Chen, B. P. Kay, C. R. Hoffman +30
The spin-orbit splitting between neutron 1 orbitals at Si has been deduced using the single-neutron-adding (,) reaction in inverse kinematics with a beam of …
Testing the capability of low-energy light ions identification of the TRACE silicon detectors
N. Cieplicka-OryÅczak, D. Mengoni, M. CiemaÅa +19
The in-beam tests of two Si pixel type TRACE detectors have been performed at Laboratori Nazionali di Legnaro (Italy). The aim was to investigate the possibility of identifying hea…
Lifetime measurements in Co and Co
A. Dijon, E. Clément, G. De France +19
Lifetimes of the and states in Co and the state in Co were measured using the recoil distance Doppler shift and the differential decay c…
Coexisting normal and intruder configurations in Mg
N. Kitamura, K. Wimmer, A. Poves +25
Situated in the so-called "island of inversion," the nucleus Mg is considered as an archetypal example of the disappearance of magicity at . We report on high statisti…
Isospin symmetry in the triplet
K. Wimmer, P. Ruotsalainen, S. M. Lenzi +44
Excited states in the nuclei Ga and Ge were populated in direct reactions of relativistic radioactive ion beams at the RIBF. Coincident \grays were meas…
Nuclear Structure Towards N=40 60Ca: In-beam gamma-ray Spectroscopy of 58,60Ti
A. Gade, R. V. F. Janssens, D. Weisshaar +28
Excited states in the neutron-rich N=38,36 nuclei \nuc{60}{Ti} and \nuc{58}{Ti} were populated in nucleon-removal reactions from \nuc{61}{V} projectiles at 90~MeV/nucleon. The γ-r…
Manifestation of the Berry phase in the atomic nucleus Pb
J. J. Valiente-Dobón, A. Gottardo, G. Benzoni +57
The neutron-rich Pb isotope was produced in the fragmentation of a primary 1 GeV U beam, separated in FRS in mass and atomic number, and then implanted for isom…
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…
Multinucleon transfer reactions in closed-shell nuclei
S. Szilner, C. A. Ur, L. Corradi +29
Multinucleon transfer reactions in 40Ca+96Zr and 90Zr+208Pb have been measured at energies close to the Coulomb barrier in a high resolution gamma-particle coincidence experiment.…
A proton density bubble in the doubly magic Si nucleus
A. Mutschler, A. Lemasson, O. Sorlin +19
Many properties of the atomic nucleus, such as vibrations, rotations and incompressibility, can be interpreted as due to a two component quantum liquid of protons and neutrons. Ele…
Shape coexistence in the neutron-deficient Hg investigated via lifetime measurements
M. Siciliano, I. Zanon, A. Goasduff +41
Shape coexistence in the region has been established in mercury, lead and polonium isotopes. Even-even mercury isotopes with present multiple f…
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…