Publications (54)
The NUMEN project: NUclear Matrix Elements for Neutrinoless double beta decay
F. Cappuzzello, C. Agodi, M. Cavallaro +68
The article describes the main achievements of the NUMEN project together with an updated and detailed overview of the related R&D activities and theoretical developments. NUMEN pr…
Effects of upward-going cosmic muons on density radiography of volcanoes
K. Jourde, D. Gibert, J. Marteau +5
Muon tomography aims at deriving the density structure of geological bodies from their screening attenuation produced on the natural cosmic muons flux. Because of their open-sky ex…
The LOFAR Multifrequency Snapshot Sky Survey (MSSS) I. Survey description and first results
G. H. Heald, R. F. Pizzo, E. Orrú +147
We present the Multifrequency Snapshot Sky Survey (MSSS), the first northern-sky LOFAR imaging survey. In this introductory paper, we first describe in detail the motivation and de…
Characterization of newly developed large area SiC sensors for the NUMEN experiment
D. Carbone, A. Spatafora, D. Calvo +7
First prototypes of large area, p-n junction, silicon carbide (SiC) detectors have been produced as part of an ongoing programme to develop a new particle identification wall for t…
LOFAR Observations of Swift J1644+57 and Implications for Short-Duration Transients
Y. Cendes, R. A. M. J. Wijers, J. D. Swinbank +25
Aims: We have analyzed low frequency radio data of tidal disruption event (TDE) Swift J1644+57 to search for a counterpart. We consider how brief transient signals (on the order of…
Study of one-proton transfer reaction for the O + Ti system at 275 MeV
O. Sgouros, M. Cavallaro, F. Cappuzzello +38
Single-nucleon transfer reactions are processes that selectively probe single-particle components of the populated many-body nuclear states. In this context, recent efforts have be…
The ASKAP/EMU Source Finding Data Challenge
A. M. Hopkins, M. T. Whiting, N. Seymour +31
The Evolutionary Map of the Universe (EMU) is a proposed radio continuum survey of the Southern Hemisphere up to declination +30 deg., with the Australian Square Kilometre Array Pa…
Analysis of one-neutron transfer reaction in O + Se collision at 275 MeV
I. Ciraldo, F. Cappuzzello, M. Cavallaro +45
Purpose: We want to analyze transitions to low-lying excited states of the residual and ejectile nuclei in the 76Se(18O, 17O) 77Se one-neutron stripping reaction at 275-MeV inciden…
LOFAR discovery of a quiet emission mode in PSR B0823+26
C. Sobey, N. J. Young, J. W. T. Hessels +91
PSR B0823+26, a 0.53-s radio pulsar, displays a host of emission phenomena over timescales of seconds to (at least) hours, including nulling, subpulse drifting, and mode-changing.…
NURE: An ERC project to study nuclear reactions for neutrinoless double beta decay
M. Cavallaro, E. Aciksoz, L. Acosta +71
Neutrinoless double beta decay (0ν\b{eta}\b{eta}) is considered the best potential resource to determine the absolute neutrino mass scale. Moreover, if observed, it will signal th…
Low-radio-frequency eclipses of the redback pulsar J2215+5135 observed in the image plane with LOFAR
J. W. Broderick, R. P. Fender, R. P. Breton +30
The eclipses of certain types of binary millisecond pulsars (i.e. `black widows' and `redbacks') are often studied using high-time-resolution, `beamformed' radio observations. Howe…
Measuring nuclear reaction cross sections to extract information on neutrinoless double beta decay
M. Cavallaro, F. Cappuzzello, C. Agodi +72
Neutrinoless double beta decay (0v\b{eta}\b{eta}) is considered the best potential resource to access the absolute neutrino mass scale. Moreover, if observed, it will signal that n…
Important role of projectile excitation in O+Ni and O+Al scattering at intermediate energies
V. A. B. Zagatto, F. Cappuzzello, J. Lubian +9
The elastic scattering angular distribution of the ONi system at MeV was measured in the range of the Rutherford cross section down to orders of magnitude…
LOFAR 144-MHz follow-up observations of GW170817
J. W. Broderick, T. W. Shimwell, K. Gourdji +66
We present low-radio-frequency follow-up observations of AT 2017gfo, the electromagnetic counterpart of GW170817, which was the first binary neutron star merger to be detected by A…
Mini-phoswich and SiPM for Heavy Ion Detection
D. Carbone, P. Finocchiaro, C. Agodi +9
The possibility to use a mini-phoswich detector to identify ions in the region of Z ~ 10 is explored in the framework of the NUMEN project. The NUMEN program, aimed at the investig…
Depletion depth measurements of new large area silicon carbide detectors
A. Spatafora, D. Carbone, L. La Fauci +9
The ion beam induced charge technique with proton microprobe is used to characterise newly developed p-n junction large area silicon carbide detectors. They were recently produced…
New methods to constrain the radio transient rate: results from a survey of four fields with LOFAR
D. Carbone, A. J. van der Horst, R. A. M. J. Wijers +23
We report on the results of a search for radio transients between 115 and 190\,MHz with the LOw-Frequency ARray (LOFAR). Four fields have been monitored with cadences between 15 mi…
Analysis of the one-neutron transfer to O, Si and Ni induced by (O, O) reaction at 84 MeV
R. Linares, M. J. Ermamatov, J. Lubian +10
Background: Recently, a systematic exploration of two-neutron transfer induced by the (O, O) reaction on different targets has been performed. The high resolution dat…
The MEV project: design and testing of a new high-resolution telescope for Muography of Etna Volcano
D. Lo Presti, G. Gallo, D. L. Bonanno +12
The MEV project aims at developing a muon telescope expressly designed for the muography of Etna Volcano. In particular, one of the active craters in the summit area of the volcano…
LOFAR MSSS: Discovery of a 2.56 Mpc giant radio galaxy associated with a disturbed galaxy group
A. O. Clarke, G. Heald, T. Jarrett +40
We report on the discovery in the LOFAR Multifrequency Snapshot Sky Survey (MSSS) of a giant radio galaxy (GRG) with a projected size of Mpc projected on the sky. I…
Heavy-ion double charge exchange reactions: a tool towards 0v\b{eta}\b{eta} nuclear matrix elements
F. Cappuzzello, M. Cavallaro, C. Agodi +4
The knowledge of the nuclear matrix elements for the neutrinoless double beta decay is fundamental for neutrino physics. In this paper, an innovative technique to extract informati…
The peculiar radio galaxy 4C 35.06: a case for recurrent AGN activity?
A. Shulevski, R. Morganti, P. D. Barthel +85
Using observations obtained with the LOw Fequency ARray (LOFAR), the Westerbork Synthesis Radio Telescope (WSRT) and archival Very Large Array (VLA) data, we have traced the radio…
Calibrating the absolute amplitude scale for air showers measured at LOFAR
A. Nelles, J. R. Hörandel, T. Karskens +74
Air showers induced by cosmic rays create nanosecond pulses detectable at radio frequencies. These pulses have been measured successfully in the past few years at the LOw Frequency…
Analysis of two-proton transfer in the 40Ca(18O,20Ne)38Ar reaction at 270 MeV incident energy
J. L. Ferreira, D. Carbone, M. Cavallaro +16
Two-nucleon transfer reactions are essential tools to investigate specific features of the nuclearstructure such as the correlation among valence particles in the transfer process.…
The LOFAR long baseline snapshot calibrator survey
J. Moldón, A. T. Deller, O. Wucknitz +82
Aims. An efficient means of locating calibrator sources for International LOFAR is developed and used to determine the average density of usable calibrator sources on the sky for s…
An upgraded focal plane detector for the MAGNEX spectrometer
D. Torresi, O. Sgouros, V. Soukeras +11
An upgraded and improved version of the focal plane detector (FPD) of the large-acceptance magnetic spectrometer MAGNEX is described here. The FPD consists of a tracker operating a…
A large light-mass component of cosmic rays at 10^{17} - 10^{17.5} eV from radio observations
S. Buitink, A. Corstanje, H. Falcke +101
Cosmic rays are the highest energy particles found in nature. Measurements of the mass composition of cosmic rays between 10^{17} eV and 10^{18} eV are essential to understand whet…
High precision probe of the fully sequential decay width of the Hoyle state in C
D. Dell'Aquila, I. Lombardo, G. Verde +25
The decay path of the Hoyle state in C () has been studied with the reaction induced at $10.5…
Orbital and superorbital variability of LS I +61 303 at low radio frequencies with GMRT and LOFAR
B. Marcote, M. Ribó, J. M. Paredes +23
LS I +61 303 is a gamma-ray binary that exhibits an outburst at GHz frequencies each orbital cycle of 26.5 d and a superorbital modulation with a period of 4.6…
The MAGNEX magnetic spectrometer for double charge exchange reactions
M. Cavallaro, C. Agodi, G. A. Brischetto +10
Physics cases of increasing interest in the recent years, such as the study of double charge exchange reactions for neutrino physics, require the study of very suppressed reaction…
RFI Flagging Implications for Short-Duration Transients
Y. Cendes, P. Prasad, A. Rowlinson +24
With their wide fields of view and often relatively long coverage of any position in the sky in imaging survey mode, modern radio telescopes provide a data stream that is naturally…
LOFAR 150-MHz observations of SS 433 and W 50
J. W. Broderick, R. P. Fender, J. C. A. Miller-Jones +28
We present LOFAR high-band data over the frequency range 115-189 MHz for the X-ray binary SS 433, obtained in an observing campaign from 2013 February - 2014 May. Our results inclu…
Nuclear structure studies performed using the (18O,16O) twoneutron transfer reactions
D. Carbone, C. Agodi, F. Cappuzzello +8
Excitation energy spectra and absolute cross section angular distributions were measured for the 13C(18O,16O)15C two-neutron transfer reaction at 84 MeV incident energy. This react…
A global study of Be + p at 2.72 A MeV
V. Soukeras, O. Sgouros, A. Pakou +17
Background: In our recent experiment, Be+p at 5.67A MeV, the breakup decay rates to the 3 configurations, ++n, Be+n and He+He of Be, were observed a…
Elastic and inelastic scattering of O on Al and Si at 240 MeV
L. M. Fonseca, R. Linares, V. A. B. Zagatto +6
The nuclear scattering at energies well above the Coulomb barrier allows for a fairly sensitive examination of the parameters of the optical potential when the relevant couplings a…
LOFAR MSSS: Detection of a low-frequency radio transient in 400 hrs of monitoring of the North Celestial Pole
A. J. Stewart, R. P. Fender, J. W. Broderick +99
We present the results of a four-month campaign searching for low-frequency radio transients near the North Celestial Pole with the Low-Frequency Array (LOFAR), as part of the Mult…
Strain determination in the Si channel above a single SiGe island inside a field effect transistor using nanobeam x-ray diffraction
N. Hrauda, J. J. Zhang, E. Wintersberger +9
SiGe islands are used to induce tensile strain in the Si channel of Field Effect Transistors to achieve larger transconductance and higher current driveabilities. We report on x-ra…
Identification of medium mass (A=60-80) ejectiles from 15 MeV/nucleon peripheral heavy-ion collisions with the MAGNEX large-acceptance spectrometer
G. A. Souliotis, S. Koulouris, F. Cappuzzello +13
An approach to identify medium-mass ejectiles from peripheral heavy-ion reactions in the energy region of 15 MeV/nucleon is developed for data obtained with a large acceptance magn…
Limits on Fast Radio Bursts and other transient sources at 182 MHz using the Murchison Widefield Array
A. Rowlinson, M. E. Bell, T. Murphy +33
We present a survey for transient and variable sources, on timescales from 28 seconds to 1 year, using the Murchison Widefield Array (MWA) at 182 MHz. Down to a detection thr…
Analysis of two-nucleon transfer reactions in the 20Ne + 116Cd system at 306 MeV
D. Carbone, J. L. Ferreira, S. Calabrese +46
Background: Heavy-ion induced two-nucleon transfer reactions are powerful tools to reveal peculiar aspects of the atomic nucleus, such as pairing correlations, single-particle and…
20Ne + 76Ge elastic and inelastic scattering at 306 MeV
A. Spatafora, F. Cappuzzello, D. Carbone +46
Background: Double charge exchange (DCE) nuclear reactions have recently attracted much interest as tools to provide experimentally driven information about nuclear matrix elements…
Analysis of the background on cross section measurements with the MAGNEX spectrometer: the (20Ne,20O) Double Charge Exchange case
S. Calabrese, F. Cappuzzello, D. Carbone +40
The MAGNEX magnetic spectrometer is used in the experimental measurements of Double Charge Exchange and Multi-Nucleon Transfer reactions induced by heavy ions within the NUMEN proj…
PySE: Software for Extracting Sources from Radio Images
D. Carbone, H. Garsden, H. Spreeuw +8
PySE is a Python software package for finding and measuring sources in radio telescope images. The software was designed to detect sources in the LOFAR telescope images, but can be…
Competition between direct and sequential two-neutron transfers in the O + Si collision at 84 MeV
E. N. Cardozo, J. Lubian, R. Linares +7
In this work we study the simultaneous and sequential two-neutron transfer mechanisms to the Si nucleus induced by (t,p) and (O, O) reactions. New experimental…
Multi-channel experimental and theoretical constraints for the Cd(Ne,F)In charge exchange reaction at 306 MeV
S. Burrello, S. Calabrese, F. Cappuzzello +43
Charge exchange (CE) reactions offer a major opportunity to excite nuclear isovector modes, providing clues about the nuclear interaction in the medium. Moreover, double charge exc…
Pulsar polarisation below 200 MHz: Average profiles and propagation effects
A. Noutsos, C. Sobey, V. I. Kondratiev +52
We present the highest-quality polarisation profiles to date of 16 non-recycled pulsars and four millisecond pulsars, observed below 200 MHz with the LOFAR high-band antennas. Base…
Design and performance of the prototype of the new Particle Identification system for the MAGNEX spectrometer within the NUMEN project
C. Lombardo, D. Carbone, A. Spatafora +12
The MAGNEX large acceptance magnetic spectrometer is installed at the Laboratori Nazionali del Sud of the Istituto Nazionale di Fisica Nucleare (INFN-LNS) in Catania. In the past,…
LOFAR MSSS: The Scaling Relation between AGN Cavity Power and Radio Luminosity at Low Radio Frequencies
G. Kokotanekov, M. Wise, G. H. Heald +35
We present a new analysis of the widely used relation between cavity power and radio luminosity in clusters of galaxies with evidence for strong AGN feedback. We study the correlat…
Characterization of a gas detector prototype based on Thick-GEM for the MAGNEX focal plane detector
I. Ciraldo, G. A. Brischetto, D. Torresi +18
A new gas detector prototype for the upgrade of the focal plane detector of the MAGNEX large-acceptance magnetic spectrometer has been developed and tested in view of the NUMEN pro…
Probing nuclear interactions à la Rutherford: Insights on He from scattering
F. Cappuzzello, V. Soukeras, S. Bacca +27
Nuclear interactions play a key role for the stability of atomic nuclei and stellar environments. Successful parametrization and models of these interactions, developed in the last…
One-neutron transfer reaction in the O + Ti collision at 275 MeV
O. Sgouros, M. Cutuli, F. Cappuzzello +29
The present article reports new data on the Ti(O,O)Ti reaction at 275 MeV incident energy as part of the systematic research pursued within the NUMEN pr…
The MAGNEX spectrometer: results and perspectives
F. Cappuzzello, C. Agodi, D. Carbone +1
This article discusses the main achievements and future perspectives of the MAGNEX spectrometer at the INFN-LNS laboratory in Catania (Italy). MAGNEX is a large acceptance magnetic…
Charge-state distributions of 20Ne ions emerging from thin foils
M. Cavallaro, G. Santagati, F. Cappuzzello +42
New experimental measurements of charge state distributions produced by a 20Ne10+ beam at 15 MeV/u colliding on various thin solid targets are presented. The use of the MAGNEX magn…
Application of an ab-initio S-matrix to data analysis of transfer to the continuum reactions populating 11Be
A. Bonaccorso, F. Cappuzzello, D. Carbone +4
Recently, the bound and continuum spectrum of 11Be has been calculated within the ab-initio no-core shell model with continuum (NCSMC) method successfully reproducing the parity in…