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Silvia Leoni (University of Milano and INFFN Milano)9/12/24, 2:40โฏPM
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Magdalena Gorska (GSI Darmstadt)9/12/24, 2:45โฏPM
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Kasia Hadynska-Klek (Heavy Ion Laboratory University of Warsaw)9/12/24, 3:00โฏPM
The nickel isotopes offer a unique laboratory to investigate shape evolution in the vicinity of doubly-magic N=Z nucleus, $^{56}$Ni (Z=N=28), which should exhibit similar structural properties to those observed in the Z=N=20 region. Indeed, observation of the SD structures was reported also in $^{56}$Ni, explained as the result of $mp-mh$ excitations like in the case of $^{40}$Ca [3]. However,...
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Matus Balogh (INFN LNL)9/12/24, 3:15โฏPM
In this contribution, we will present the current state of the analysis of experiments 23.07 and 23.09 studying the 56Ni and 60Zn isotopes. The goal of these experiments is to investigate the N=Z region by measuring lifetimes using the DSAM technique. These experiments were performed back-to-back, using an identical 16O@80 MeV beam and an identical AGATA+OSCAR (dE-E telescope) setup....
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J. J. Valiente Dobon on behalf of F. Azaiez .9/12/24, 4:00โฏPM
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Fanny Farget (GANIL)9/12/24, 4:20โฏPM
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Silvia Leoni (University of Milano and INFFN Milano)9/12/24, 4:40โฏPM
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9/12/24, 5:00โฏPM
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Elia Pilotto (University of Padova)9/13/24, 9:00โฏAM
In this contribution, we will present the current state of the analysis of experiment 23.003, aimed at the measurement of the lifetime of the 6.793 MeV excited state of 15O with sub-fs uncertainty. This experiment has strong astrophysical implications, as the lifetime we aim to measure strongly influences the value of the S-factor at Gamow-window energies for stars like our Sun. The experiment...
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Davide Genna (Universitร degli Studi di Milano & INFN Sezione di Milano)9/13/24, 9:15โฏAM
We present recent AGATA-PRISMA results on multi-nucleon transfer reactions induced by 22Ne and 26Mg beams on a 238U target at LNL. The experiments aim at exploring the boundaries of the N = 20 Island of Inversion by following the evolution of negative parity states originating from fp shell excitations, locating excited intruder configurations, and tracking the...
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Raquel Nicolรกs Del รlamo (INFN Padova and Universitร degli studi di Padova)9/13/24, 9:30โฏAM
Lifetime measurements are commonly used to unravel the nature and properties of nuclear states, as they are closely related to transition probabilities, which provide information on the nuclear wave functions. The aim of the experiment here presented was to study the interplay of spherical (0 โฯ) and intruder (2 โฯ) configurations in the low-lying states of isotopes on the edge of the N=20...
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Luca Zago (University of Padova, INFN LNL)9/13/24, 9:45โฏAM
The disappearance of the N=20 shell closure in the so-called โisland of inversionโ around $^{32}$Mg is one of the most striking examples of the strength of nucleon-nucleon correlations. In this region, the quadrupole-deformed intruder configuration (based on a multi-particle multi-hole configuration) becomes the ground state, subverting the expected shell ordering predicted by a harmonic...
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Giuseppe Andreetta (UNIPD, INFN LNL)9/13/24, 10:00โฏAM
The pairing interaction, responsible for the two-nucleon correlation, plays a fundamental role in defining the low-energy spectra of atomic nuclei and the properties of their ground state. The effect of pairing correlations in the reaction dynamics can be explored by using heavy-ion reactions, in particular those involving a transfer of few nucleons. In this context, an interesting analogy...
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Magdalena Zielinska (CEA Saclay)9/13/24, 10:15โฏAM
The experiment 22.18 was performed to study the nucleus $^{96}$Zr utilising the $\gamma$-ray tracking spectrometer AGATA coupled with the heavy-ion detector array SPIDER at INFN-LNL. This experiment is extremely timely in order to provide directly the $3^-_ 1 \rightarrow 0^+_1$ $\gamma$-ray transition probability for the first time. Previous measurements suggested that the $\gamma$-ray...
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Damiano Stramaccioni9/13/24, 10:30โฏAM
We present the preliminary analysis of an experiment performed at INFN LNL in November 2023 aimed at studying the two-octupole phonon collectivity in $^{96}$Zr. The goal of the experiment was to perform a $\gamma$-decay branching ratio measurement from the 6$^+$ to the 3$^-$ state, so as to extract the B(E3; $6^+ \rightarrow 3^-$) value. If large, this parameter would indicate for the $6^+$...
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Zarin Ahmed (University of Guelph)9/13/24, 10:45โฏAM
Report on the AGATA experiment number 23.061
Spokespersons: M. Zieliลska, F. Ercolano, N. Marchini, J.J. Valiente DobรณnIn this talk, I will report on the recent โCombined lifetime and transition-probability measurements in 96Zr via Coulomb excitationโ experiment, conducted using the AGATA + PRISMA + Plunger detector setup during the May 23-29, 2024 beamtime. The primary aim of the...
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Robin Kjus (CEA Saclay)9/13/24, 11:30โฏAM
The neutron-deficient selenium and krypton have been observed to exhibit a wide range of shapes which can be linked to large shell gaps. Typically, for even-even nuclei in this region, the ground states are of prolate deformation with oblate states built on a deformed $0^+$ state. However, certain nuclei, such as krypton-72 and selenium-68, are suggested to have the reverse configuration,...
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Iwona Piฤtka (Heavy Ion Laboratory, University of Warsaw, Warsaw, Poland)9/13/24, 11:45โฏAM
For several decades, stable even-mass Cd isotopes have been considered to be textbook examples of multiphonon spherical vibrators [1] based on the excitation energy pattern of their low-lying states. However, a detailed study of $^{110}$In $\beta$ decay and subsequent beyond-mean-field theoretical calculations [2-5] suggested instead the presence of multiple shape coexistence in $^{110}$Cd...
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Filippo Angelini (INFN-LNL and University of Padova)9/13/24, 12:00โฏPM
In December 2022, an experiment was performed at INFN-LNL with a $^{208}$Pb beam at 1300 MeV impinging on a $^{9}$Be target, using the inverse kinematics fusion-fission reaction for both nuclear structure and reactions studies. The experiment was performed using the AGATA $\gamma$-ray tracking array coupled to the magnetic spectrometer PRISMA [1โ3]. This setup allowed one to measure the...
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Rainer Abels (University of Cologne)9/13/24, 12:15โฏPM
With the AGATA-PRISMA setup at INFN Legnaro, the experiment "Pathway to nuclear structure in heavy neutron rich nuclei in the vicinity of N=126 and nuclei northwest of $^{132}\text{Sn}$ via multinucleon transfer reactions" was carried out to measure excited states to answer open questions in these regions of the nuclear chart. A primary $^{136}\text{Xe}$ beam with an energy of 1GeV hitting a...
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Conor Sullivan (University of Liverpool)9/13/24, 12:30โฏPM
This presentation explores results from two experiments, EXP_017 (23.015) and EXP_022 (22.096), focussing on high-spin states in $^{136,137}$Nd and octupole deformation in uranium isotopes, respectively.
In EXP_017, the investigation centered on the decays out of highly deformed rotational bands in $^{136}$Nd and $^{137}$Nd. These bands challenge existing nuclear structure theories by...
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Costel Petrache (IJClab Universitรฉ Paris Sud and CNRS/IN2P3)9/13/24, 12:45โฏPM
The experiment 23.015 performed in October 21-26, 2023 was devoted to the search for the decay out of an extremely regular rotational band in $^{137}$Nd, interpreted as built on oblate shape, that extends to a spin of about 75/2 and an excitation energy of 4.5 MeV above yrast at the highest spins. We measured 7 days with the $^{33}$S+$^{110}$Pd reaction at 180 MeV and the AGATA+EUCLIDES setup....
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Hamid Ayatollahzadeh (University of the West of Scotland)9/13/24, 1:00โฏPM
Recent calculations have suggested that the region of strong octupole correlations in the
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light actinides extends to higher Z values than previously thought, with neutron-deficient
plutonium (Z = 94) and curium (Z = 96) nuclei predicted to have large ฮฒ 3 values in their
ground states [1, 2]. In order to test the predictions, an experiment has been performed
to study the structure of... -
Magdalena Zielinska (CEA Saclay), Silvia Leoni (University of Milano and INFFN Milano)9/13/24, 1:15โฏPM
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