A. Nannini
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View article: Fusion of 12C+28Si at deep sub-barrier energies
Fusion of 12C+28Si at deep sub-barrier energies Open
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 astrophysical interest. Fusion of 12C + 28Si has been measured down to…
View article: Random walks on random networks of cliques: Inferring the network structure
Random walks on random networks of cliques: Inferring the network structure Open
We study the properties of discrete-time random walks on networks formed by randomly interconnected cliques, namely, random networks of cliques. Our purpose is to derive the parameters that define the network structure—specifically, the di…
View article: BEGAM, a new apparatus for the identification of β emitter contaminants in radiopharmaceuticals
BEGAM, a new apparatus for the identification of β emitter contaminants in radiopharmaceuticals Open
The BEGAM project aims at developing a portable detector capable of performing γ/β coincidence and anti-coincidence measurements to estimate the presence of long-lived β-contaminants in radiopharmaceutical solutions. A preliminary prototyp…
View article: Random walks on random networks of cliques: Inferring the network structure
Random walks on random networks of cliques: Inferring the network structure Open
We study the properties of discrete-time random walks on networks formed by randomly interconnected cliques, namely, random networks of cliques. Our purpose is to derive the parameters that define the network structure -- specifically, the…
View article: Probing Low-energy States in \(^{110}\)Cd Using Coulomb Excitation
Probing Low-energy States in \(^{110}\)Cd Using Coulomb Excitation Open
A campaign of Coulomb-excitation experiments to study the electromagnetic structure of \(^{110}\)Cd was performed using beams of \(^{14}\)N, \(^{32}\)S, and \(^{60}\)Ni. The use of various reaction partners enables disentangling the contri…
View article: Deformation and Collectivity in Doubly Magic <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>Pb</mml:mi></mml:mrow><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>208</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>
Deformation and Collectivity in Doubly Magic Open
Lead-208 is the heaviest known doubly magic nucleus and its structure is therefore of special interest. Despite this magicity, which acts to provide a strong restorative force toward sphericity, it is known to exhibit both strong octupole …
View article: Lifetime measurement after direct transfer reactions with AGATA at LNL
Lifetime measurement after direct transfer reactions with AGATA at LNL Open
Lifetimes of nuclear excited states are important observables in nuclear structure studies, since they can directly be related to electromagnetic transition matrix elements. The determination of transition probabilities between nuclear sta…
View article: Reevaluation of structures in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Se</mml:mi><mml:mprescripts/><mml:none/><mml:mn>70</mml:mn></mml:mmultiscripts></mml:math> from combined conversion-electron and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math>-ray spectroscopy
Reevaluation of structures in from combined conversion-electron and -ray spectroscopy Open
In the selenium isotopes various shape phenomena are present, in particular, the emergence of a dominant oblate deformation in the most neutron-deficient isotopes has been observed. The scenario of shape coexisting oblate and prolate bands…
View article: Spherical-oblate shape coexistence in $^{94}$Zr from a model-independent analysis
Spherical-oblate shape coexistence in $^{94}$Zr from a model-independent analysis Open
Low-lying states of $^{94}$Zr were investigated via low-energy multi-step Coulomb excitation. From the measured $γ$-ray yields, 13 reduced transition probabilities between low-spin states were determined, together with the spectroscopic qu…
View article: Structure of Low-spin States in \(^{45}\)Sc Studied via Coulomb Excitation
Structure of Low-spin States in \(^{45}\)Sc Studied via Coulomb Excitation Open
The electromagnetic structure of 45Sc at low excitation energy was investigated via low-energy Coulomb excitation at the Heavy Ion Laboratory (HIL) of the University of Warsaw and at the Inter-University Accelerator Centre (IUAC) in New De…
View article: Investigating the intruder states of <sup>83</sup>Se via lifetime measurements
Investigating the intruder states of <sup>83</sup>Se via lifetime measurements Open
Quadrupole interaction involving protons and neutrons drives the nucleus into deformed configurations at low excitation energies. Intruder states appear in N=49 isotones, reaching a minimum at around 500 keV in 83 Se. Since 83 Se is in the…
View article: First Report of a Doublet 2209-keV State in \(^{100}\)Zr
First Report of a Doublet 2209-keV State in \(^{100}\)Zr Open
International audience
View article: Improved measurement of the $0_2^+\rightarrow0_1^+$ E0 transition strength for $^{72}$Se using the SPICE spectrometer
Improved measurement of the $0_2^+\rightarrow0_1^+$ E0 transition strength for $^{72}$Se using the SPICE spectrometer Open
The selenium isotopes lie at the heart of a tumultuous region of the nuclear chart where shape coexistence effects grapple with neutron-proton pairing correlations, triaxiality, and the impending proton dripline. In this work a study of $^…
View article: Electric monopole transitions and low-lying level structure in 106Pd
Electric monopole transitions and low-lying level structure in 106Pd Open
The structure of 106Pd, populated in the EC/beta+ decay of 106Ag, was investigated at the INFN Legnaro National Laboratories using the Spes Low-energy Internal Conversion Electron Spectrometer (SLICES). The K-internal conversion coefficien…
View article: The γ decay of the Hoyle and higher excitation energy states of <sup>12</sup>C
The γ decay of the Hoyle and higher excitation energy states of <sup>12</sup>C Open
The Hoyle state and few other excited levels of 12 C are fundamental for the production of carbon in the universe. In particular, the γ decay branching ratio is of utmost importance, being the only way to produce a carbon at the gro…
View article: On the <sup>12</sup>C Hoyle state gamma decay
On the <sup>12</sup>C Hoyle state gamma decay Open
The γ-decays of 12 C excited levels (the Hoyle state 0 + at 7.65 MeV and the 9.64 MeV 3) are essential for its production in the universe. We present here a new attempt to precisely measure such γ-decay probabilities. The measurement was p…
View article: Gamma ray detection with CHIMERA at LNS: results and perspectives
Gamma ray detection with CHIMERA at LNS: results and perspectives Open
We describe the use of the 4tt CHIMERA charged particle detector as a large efficiency y-ray detector. The CsI(Tl) stage of the CHIMERA telescope is used to detect and identify y-rays. The high detection efficiency and the sufficient energ…
View article: Physics opportunities with the Advanced Gamma Tracking Array: AGATA
Physics opportunities with the Advanced Gamma Tracking Array: AGATA Open
New physics opportunities are opening up by the Advanced Gamma Tracking Array, AGATA, as it evolves to the full 4 $$\pi $$ instrument. AGATA is a high-resolution $$\gamma $$ -ray spectrometer, solely built from highly segmented high-pu…
View article: High Resolution γ-Ray Spectroscopy Using GALILEO Array
High Resolution γ-Ray Spectroscopy Using GALILEO Array Open
The GALILEO $γ$-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 structure studies employing the variety of in-beam $γ$-ray sp…
View article: Low-energy Coulomb excitation of <sup>94</sup>Zr
Low-energy Coulomb excitation of <sup>94</sup>Zr Open
Recent state-of-the-art Monte Carlo shell-model calculations predict shape coexistence in Zr isotopes. In this context, the 94Zr nucleus is particularly interesting since some experimental investigations have already suggested the possible…
View article: High resolution gamma-ray spectrometry using GALILEO array
High resolution gamma-ray spectrometry using GALILEO array Open
The GALILEO γ-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 structure studies employing the variety of in-beam γ-ray spectr…
View article: High resolution $\gamma$-ray spectroscopy using GALILEO array.
High resolution $\gamma$-ray spectroscopy using GALILEO array. Open
The GALILEO $\\gamma$-ray spectrometer has been constructed at the Legnaro\nNational Laboratory of INFN (LNL-INFN). It can be coupled to advanced ancillary\ndevices which allows nuclear structure studies employing the variety of in-beam\n$…
View article: Shape coexistence in <sup>94</sup>Zr studied via Coulomb excitation
Shape coexistence in <sup>94</sup>Zr studied via Coulomb excitation Open
In recent years, a number of both theoretical and experimental investigations have been performed focusing on the zirconium isotopic chain. In particular, state-of-the-art Monte Carlo shell-model calculations predict shape coexistence in t…
View article: First results of the Hoyle-Gamma experiment: study of the excited levels in carbon-12 gamma decay
First results of the Hoyle-Gamma experiment: study of the excited levels in carbon-12 gamma decay Open
International audience
View article: EXILL—a high-efficiency, high-resolution setup for γ-spectroscopy at an intense cold neutron beam facility
EXILL—a high-efficiency, high-resolution setup for γ-spectroscopy at an intense cold neutron beam facility Open
In the EXILL campaign a highly efficient array of high purity germanium (HPGe) detectors was operated at the cold neutron beam facility PF1B of the Institut Laue-Langevin (ILL) to carry out nuclear structure studies, via measurements of γ-…
View article: A new method for the determination of very small Γ<sub>γ</sub> partial widths
A new method for the determination of very small Γ<sub>γ</sub> partial widths Open
We present a new method for the measurement of very small Γγ partial width that is important for the synthesis of elements in astrophysics. The method is based on the simultaneous detection of scattered beam, residual nucleus and decay γ r…