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Probing exotic cross-shell interactions at $N=28$ with single-neutron transfer on $^{47}$K
/ Paxman, C.J. (Surrey U.) ; Matta, A. (LPC, Caen) ; Catford, W.N. (Surrey U.) ; Lotay, G. (Surrey U.) ; Assié, M. (IJCLab, Orsay) ; Clément, E. (GANIL) ; Lemasson, A. (GANIL) ; Ramos, D. (GANIL) ; Orr, N.A. (LPC, Caen) ; Galtarossa, F. (IJCLab, Orsay) et al.
We present the first measurement of the $^{47}$K($d,p\gamma$)$^{48}$K transfer reaction, performed in inverse kinematics using a reaccelerated beam of $^{47}$K. [...]
arXiv:2409.12594.
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Beam dynamics driven design of powerful energy recovery linac for experiments
/ Bogacz, S A (Jefferson Lab) ; André, K D J (CERN) ; Brüning, O (CERN) ; Holzer, B J (CERN) ; Hounsell, B R (U. Liverpool (main)) ; Klein, M (U. Liverpool (main)) ; Militsyn, B L (Daresbury) ; Williams, P H (Daresbury) ; Segurana, G Pérez (Lancaster U.) ; Bailey, I (Lancaster U.) et al.
Powerful ERL for experiments (PERLE) is a novel energy recovery linac (ERL) test facility [1], designed to validate choices for a 50 GeV ERL foreseen in the design of the Large Hadron Electron Collider and the Future Circular Collider and to host dedicated nuclear and particle physics experiments. Its main goal is to demonstrate the high current, continuous wave, multipass operation with superconducting cavities at 802 MHz. [...]
2024 - 15 p.
- Published in : Phys. Rev. Accel. Beams 27 (2024) 031603
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Spectroscopic quadrupole moments in Xe124
/ Clément, E (GANIL) ; Lemasson, A (GANIL) ; Rejmund, M (GANIL) ; Jacquot, B (GANIL) ; Ralet, D (GANIL) ; Michelagnoli, C (GANIL ; Laue-Langevin Inst.) ; Barrientos, D (CERN) ; Bednarczyk, P (Cracow, INP) ; Benzoni, G (INFN, Milan) ; Boston, A J (Liverpool U.) et al.
Background: The Xe isotopic chain with four valence protons above the Z=50 shell closure is an ideal laboratory for the study of the evolution of nuclear deformation. At the N=82 shell closure, Xe136 presents all characteristics of a doubly closed shell nucleus with a spherical shape. [...]
2023 - 8 p.
- Published in : Phys. Rev. C 107 (2023) 014324
External link: accepted manuscript
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$^{178}\mathrm{Hg}$ and asymmetric fission of neutron-deficient pre-actinides
/ Jhingan, A. (IUCAA, Pune) ; Schmitt, C. (Strasbourg, IPHC) ; Lemasson, A. (GANIL) ; Biswas, S. (GANIL) ; Kim, Y.H. (IBS, Daejeon, CENS) ; Ramos, D. (GANIL) ; Andreyev, A.N. (York U., England ; CERN ; JAERI, Tokai) ; Curien, D. (Strasbourg, IPHC) ; Ciemała, M. (Cracow, INP) ; Clément, E. (GANIL) et al.
Fission at low excitation energy is an ideal playground to probe the impact of nuclear structure on nuclear dynamics. While the importance of structural effects in the nascent fragments is well-established in the (trans-)actinide region, the observation of asymmetric fission in several neutron-deficient pre-actinides can be explained by various mechanisms. [...]
arXiv:2211.01879.-
2022-10-19 - 9 p.
- Published in : Phys. Rev. C 106 (2022) 044607
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Evidence of Partial Seniority Conservation in the $\pi{g}_{9/2}$ Shell for the $N=50$ Isotones
/ Pérez-Vidal, R M (Valencia U., IFIC ; INFN, Legnaro) ; Gadea, A (Valencia U., IFIC) ; Domingo-Pardo, C (Valencia U., IFIC) ; Gargano, A (INFN, Naples ; Carlos III U., Madrid) ; Valiente-Dobón, J J (INFN, Legnaro) ; Clément, E (GANIL) ; Lemasson, A (GANIL) ; Coraggio, L (INFN, Naples ; Carlos III U., Madrid ; Napoli Seconda U.) ; Siciliano, M (Argonne, PHY) ; Szilner, S (Boskovic Inst., Zagreb) et al.
The reduced transition probabilities for the $4^+_1 \to 2^+_1$ and $2^+_1 \to 0^+_1$ transitions in $^{92}$Mo and $^{94}$Ru and for the $4^+_1 \to 2^+_1$ and $6^+_1 \to 4^+_1$ transitions in $^{90}$Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the $f_{5/2}, p_{3/2}, p_{1/2},$ and $g_{9/2}$ proton valence space. [...]
2022 - 7 p.
- Published in : Phys. Rev. Lett. 129 (2022) 112501
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Reinterpretation of excited states in $^{212}$Po: Shell-model multiplets rather than $\alpha$-cluster states
/ Fernández, A (CSIC, Madrid) ; Jungclaus, A (CSIC, Madrid) ; Golubev, P (Lund U.) ; Rudolph, D (Lund U.) ; Sarmiento, L G (Lund U.) ; Gargano, A (INFN, Naples) ; Naïdja, H (Constantine U.) ; Astier, A (IJCLab, Orsay) ; Dupont, E (IJCLab, Orsay) ; Gadea, A (Valencia U., IFIC) et al.
A $\gamma$ -ray spectroscopic study of $^{212}$Po was performed at the Grand Accélérateur National d’Ions Lourds, using the inverse kinematics α-transfer reaction $^{12}$C($^{208}$Pb, $^{212}$Po) $^8$Be and the AGATA spectrometer. A careful analysis based on $\gamma \gamma$ coincidence relations allowed us to establish 14 new excited states in the energy range between 1.9 and 3.3 MeV. [...]
2021 - 19 p.
- Published in : Phys. Rev. C 104 (2021) 054316
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Experimental Evidence for Common Driving Effects in Low-Energy Fission from Sublead to Actinides
/ Schmitt, C (Strasbourg, IPHC) ; Lemasson, A (GANIL) ; Schmidt, K H (Erzhausen, Germany) ; Jhingan, A (IUAC, New Delhi) ; Biswas, S (GANIL) ; Kim, Y H (Laue-Langevin Inst.) ; Ramos, D (GANIL) ; Andreyev, A N (York U., England ; JAERI, Tokai ; CERN) ; Curien, D (Strasbourg, IPHC) ; Ciemala, M (Cracow, INP) et al.
Isotopic distributions of fragments from fission of the neutron-deficient $^{178}$Hg nuclide are reported. This experimental observable is obtained for the first time in the region around lead using an innovative approach based on inverse kinematics and the coincidence between the large acceptance magnetic spectrometer VAMOS++ and a new detection arm close to the target. [...]
2021 - 6 p.
- Published in : Phys. Rev. Lett. 126 (2021) 132502
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Testing ab initio nuclear structure in neutron-rich nuclei: lifetime measurements of second 2$^+$ states in $^{16}$C and $^{20}$O
/ Ciemala, M. (Cracow, INP) ; Ziliani, S. (Milan U. ; INFN, Milan) ; Crespi, F.C.L. (Milan U. ; INFN, Milan) ; Leoni, S. (Milan U. ; INFN, Milan) ; Fornal, B. (Cracow, INP) ; Maj, A. (Cracow, INP) ; Bednarczyk, P. (Cracow, INP) ; Benzoni, G. (INFN, Milan) ; Bracco, A. (Milan U. ; INFN, Milan) ; Boiano, C. (INFN, Milan) et al.
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 lifetime of the second 2+ state in 16C have been obtained, for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds femtoseconds range, by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction 18O (7.0 MeV/u) + 181Ta. [...]
arXiv:2002.04814.-
2020-02-28 - 7 p.
- Published in : Phys. Rev. C 101 (2020) 021303
Fulltext: PDF; Published fulltext: PhysRevC.101.021303 - PDF; 0144fdb9ec521f98f02c56efc9fa40a9 - PDF;
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Lifetime measurements in $^{52,54}$Ti to study shell evolution toward $N=32$
/ AGATA Collaboration
Lifetimes of the excited states in the neutron-rich Ti52,54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accélérateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the γ-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. [...]
2019 - 12 p.
- Published in : Phys. Rev. C 100 (2019) 054317
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Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich $^{122-131}$Sb$_{51}$ isotopes
/ Biswas, S. (GANIL) ; Lemasson, A. (GANIL) ; Rejmund, M. (GANIL) ; Navin, A. (GANIL) ; Kim, Y.H. (GANIL) ; Michelagnoli, C. (GANIL) ; Stefan, I. (Orsay, IPN) ; Banik, R. (Calcutta, VECC ; HBNI, Mumbai) ; Bednarczyk, P. (Cracow, INP) ; Bhattacharya, S. (Calcutta, VECC ; HBNI, Mumbai) et al.
The neutron-rich $^{122-131}$Sb isotopes were produced as fission fragments in the reaction $^{9}$Be($^{238}$U,~f) with 6.2 MeV/u beam energy. An unique setup, consisting of AGATA, VAMOS++ and EXOGAM detectors, was used which enabled the prompt-delayed gamma-ray ($\gamma$) spectroscopy of fission fragments in the time range of 100 ns - 200 $\mu$s. [...]
arXiv:1906.01245.-
2019-06-03 - 21 p.
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