A5113346110- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Molecular Physics
- Astronomical and nuclear sciences
- Advanced Chemical Physics Studies
- Nuclear reactor physics and engineering
- Advanced NMR Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Rare-earth and actinide compounds
- Astro and Planetary Science
- Mass Spectrometry Techniques and Applications
- Particle accelerators and beam dynamics
- Radiopharmaceutical Chemistry and Applications
- Chemical Thermodynamics and Molecular Structure
- Medical Imaging Techniques and Applications
- Crystal Structures and Properties
- Fusion materials and technologies
- Particle physics theoretical and experimental studies
- Scientific Research and Discoveries
- Laser-induced spectroscopy and plasma
- Neutrino Physics Research
- Radioactive Decay and Measurement Techniques
- Gamma-ray bursts and supernovae
Stockholm University
2021-2025
Universidad de Salamanca
2012-2023
University of Liverpool
2017-2022
GSI Helmholtz Centre for Heavy Ion Research
2013-2022
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2022
KTH Royal Institute of Technology
2013-2021
University of Jyväskylä
2021
AlbaNova
2016
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
2010
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2010
The Advanced GAmma Tracking Array (AGATA) is a European project to develop and operate the next generation gamma-ray spectrometer. AGATA based on technique of energy tracking in electrically segmented high-purity germanium crystals. This requires accurate determination energy, time position every interaction as gamma ray deposits its within detector volume. Reconstruction full path results with very high efficiency excellent spectral response. realization result many technical advances....
Background: Neutron-rich nuclei with protons in the fp shell show an onset of collectivity around N=40. Spectroscopic information is required to understand underlying mechanism and determine relevant terms nucleon-nucleon interaction that are responsible for evolution structure this mass region. Methods: We report on lifetime measurement first 2+ 4+ states 70,72,74Zn 6+ state 72Zn using recoil distance Doppler shift method. The experiment was carried out at INFN Laboratory Legnaro AGATA...
The neutron-rich lead isotopes, up to $^{216}\mathrm{Pb}$, have been studied for the first time, exploiting fragmentation of a primary uranium beam at FRS-RISING setup GSI. observed isomeric states exhibit electromagnetic transition strengths which deviate from state-of-the-art shell-model calculations. It is shown that their complete description demands introduction effective three-body interactions and two-body operators in conventional neutron valence space beyond $^{208}\mathrm{Pb}$.
At a fundamental level, the interactions between protons and protons, neutrons, neutrons are not identical. Such isospin nonconserving emerge when comparing excitation energy of analog states in T=1 triplet nuclei. Here, we extend such an analysis to A=78, system-the heaviest system for which complete data exists-and find strong disagreement with contemporary theory. This was achieved by pioneering technique recoil-β-β tagging identify excited ^{78}Zr. We also established ^{78}Zr half-life...
Several instances of anomalously low values the <a:math...
The fragmentation of relativistic uranium projectiles has been exploited at the Gesellschaft f\"ur Schwerionenforschung laboratory to investigate $\ensuremath{\beta}$ decay neutron-rich nuclei just beyond ${}^{208}$Pb. This paper reports on $\ensuremath{\beta}$-delayed $\ensuremath{\gamma}$ decays ${}^{211--213}$Tl, ${}^{215}$Pb, and ${}^{215--219}$Bi de-exciting states in daughters ${}^{211--213}$Pb, ${}^{215}$Bi, ${}^{215--219}$Po. resulting partial level schemes, proposed with help...
The low-lying energy spectrum of the extremely neutron-deficient self-conjugate (N=Z) nuclide _{44}^{88}Ru_{44} has been measured using combination Advanced Gamma Tracking Array (AGATA) spectrometer, NEDA and Neutron Wall neutron detector arrays, DIAMANT charged particle array. Excited states in ^{88}Ru were populated via ^{54}Fe(^{36}Ar,2nγ)^{88}Ru^{*} fusion-evaporation reaction at Grand Accélérateur National d'Ions Lourds (GANIL) accelerator complex. observed γ-ray cascade is assigned to...
The reduced transition probabilities for the 4_{1}^{+}→2_{1}^{+} and 2_{1}^{+}→0_{1}^{+} transitions in ^{92}Mo ^{94}Ru 6_{1}^{+}→4_{1}^{+} ^{90}Zr have been determined this experiment making use of a multinucleon transfer reaction. These results interpreted on basis realistic shell-model calculations f_{5/2}, p_{3/2}, p_{1/2}, g_{9/2} proton valence space. Only combination extensive lifetime information large scale allowed extent seniority conservation N=50 orbital to be understood....
Lifetimes of the first excited ${2}^{+}$ and ${4}^{+}$ states in extremely neutron-deficient nuclide $^{172}\mathrm{Pt}$ have been measured for time using recoil-distance Doppler shift recoil-decay tagging techniques. An unusually low value ratio $B(E2:{4}_{1}^{+}\ensuremath{\rightarrow}{2}_{1}^{+})/B(E2:{2}_{1}^{+}\ensuremath{\rightarrow}{0}_{\mathrm{gs}}^{+})=0.55(19)$ was found, similar to a handful other such anomalous cases observed entire Segr\'e chart. The observation adds cluster few...
The lifetimes of the first excited 2^{+} states in N=Z nuclei ^{80}Zr, ^{78}Y, and ^{76}Sr have been measured using γ-ray line shape method following population via nucleon-knockout reactions from intermediate-energy rare-isotope beams. extracted reduced electromagnetic transition strengths yield new information on where collectivity is maximized provide evidence for a significant, as yet unexplained, odd-odd vs even-even staggering observed values. experimental results are analyzed context...
The nuclear structure of neutron-rich N>126 nuclei has been investigated following their production via relativistic projectile fragmentation a E/A=1 GeV 238U beam. Metastable states in the N=128 isotones 208Hg and 209Tl have identified. Delayed γ-ray transitions are interpreted as arising from decay Iπ=(8+) (17/2+) isomers, respectively. data allow for so far most comprehensive verification shell-model approach region determined by magic numbers Z<82 N>126.Received 1 October...
The level structure of the neutron-rich 69Cu,71Cu, and 73Cu isotopes has been investigated by means multinucleon transfer reactions. experiment was performed at Laboratori Nazionali di Legnaro using AGATA Demonstrator array coupled to PRISMA magnetic spectrometer. Lifetimes excited states in Cu nuclei were measured with recoil-distance Doppler-shift method. resulting electromagnetic matrix elements for transitions from 69,71,73Cu are used assess collective or single-particle character these...
The lifetimes of the low-lying excited states $2^+$ and $4^+$ have been directly measured in neutron-deficient $^{106,108}$Sn isotopes. nuclei were populated via a deep-inelastic reaction lifetime measurement was performed employing differential plunger device. emitted $\gamma$ rays detected by AGATA array, while products uniquely identified VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently pairing content interaction,...
Lifetimes of excited states in the yrast band neutron-deficient nuclide $^{166}\mathrm{W}$ have been measured utilizing DPUNS plunger device at target position JUROGAM II $\ensuremath{\gamma}$-ray spectrometer conjunction with RITU gas-filled separator and GREAT focal-plane spectrometer. Excited were populated $^{92}\mathrm{Mo}(^{78}\mathrm{Kr},4p$) reaction a bombarding energy 380 MeV. The measurements reveal low value for ratio reduced transitions probabilities lowest-lying...
Linear polarization and angular correlations of γ-rays depopulating excited states in the neutron-deficient nucleus 4494Ru50 have been measured, enabling firm spin-parity assignments for several this nucleus. The deduced multipolarities strong transitions yrast structure were found to be mostly stretched M1, E1, E2 types and, most cases, agreement with previous tentative assignments. multipolarity 1869 keV connecting 257 1641 indicates that state at 6358 excitation energy has spin parity...
The lifetime of the 2+→0g.s.+ transition in neutron-deficicient nucleus Te112 has been measured for first time using DPUNS plunger and recoil distance Doppler shift technique. deduced value reduced probability is B(E2:0g.s.+→2+)=0.46±0.04e2b2, indicating that there no unexpected enhancement B(E2:0g.s.+→2+) values Te isotopes below midshell. result compared to discussed framework large-scale shell-model calculations.Received 15 April 2015Revised 25 May...
The heaviest N=Z doubly-magic nucleus, $^{100}$Sn, and the neighboring nuclei offer unique opportunities to investigate properties of nuclear interaction in extreme conditions. In particular, Cd isotopes are expected present features similar those found Sn isotopic chain, since they have only two proton holes Z=50 shell. this manuscript, lifetime measurements low-lying states even-mass $^{102-108}$Cd is presented. Thanks powerful detection capabilities AGATA array VAMOS++ spectrometer,...
Neutron-rich nuclei in the lead region, beyond N=126, have been studied at FRS-RISING setup GSI, exploiting fragmentation of a primary uranium beam. Two isomeric states identified 210Hg: 8+ isomer expected from seniority scheme νg9/2 shell and second one low spin excitation energy. The decay strength confirms need effective three-body forces case neutron-rich isotopes. other unexpected low-lying has tentatively assigned as 3− state, although this is contrast with theoretical expectations.
Search for a new kind of superfluidity built on collective proton-neutron pairs with aligned spin is performed studying the Gamow-Teller decay T=1, J(π)=0+ ground state (62)Ge into excited states odd-odd N=Z nucleus (62)Ga. The experiment at GSI Helmholtzzentrum für Shwerionenforshung ions selected by fragment separator and implanted in stack Si-strip detectors, surrounded RISING Ge array. A half-life T1/2=82.9(14) ms measured state. Six (62)Ga, populated below 2.5 MeV through transitions,...
Background: In the neutron-rich A≈100 mass region, rapid shape changes as a function of nucleon number well coexistence prolate, oblate, and triaxial shapes are predicted by various theoretical models. Lifetime measurements excited levels in molybdenum isotopes allow determination transitional quadrupole moments, which turn provides structural information regarding change. Purpose: The present paper reports on experimental setup, method that allowed one to measure lifetimes states even-even...
The reduced transition probability B(E2;0(+)→2(+)) has been measured for the neutron-rich nucleus (74)Ni in an intermediate energy Coulomb excitation experiment performed at National Superconducting Cyclotron Laboratory Michigan State University. obtained B(E2;0(+)→2(+))=642(-226)(+216) e(2) fm(4) value defines a trend which is unexpectedly small if referred to (70)Ni and previous indirect determination of strength (74)Ni. This indicates polarization Z=28 core by valence neutrons....