CERN Accelerating science

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1.
Structure of Sn128 selectively populated in the β decay of the In128 ground state / IDS Collaboration
High-resolution γ-ray spectroscopy and fast-timing methods were employed to study the excited structure of Sn128, populated via the β-decay chain of Cd128→In128→Sn128. The experiment was performed by online mass separation at the ISOLDE facility at CERN, profiting from intense and pure Cd beams obtained by a temperature-controlled quartz transfer line combined with resonant laser ionization. [...]
2025 - 13 p. - Published in : Phys. Rev. C 111 (2025) 064310 Fulltext: PDF;
2.
Direct proton transfer on $^{46}$Ar supports the presence of a charge density bubble linked to a novel nuclear structure below $^{48}$Ca / Brugnara, Daniele (INFN, Padua ; INFN, Legnaro) ; Gottardo, Andrea (INFN, Legnaro) ; Assiè, Marlene (IJCLab, Orsay) ; Barbieri, Carlo (Milan U. ; INFN, Milan) ; Mengoni, Daniele (INFN, Padua) ; Beaumel, Didier (IJCLab, Orsay) ; Brolli, Stefano (Milan U. ; INFN, Milan) ; Bottoni, Simone (Milan U. ; INFN, Milan) ; Clement, Emmanuel (GANIL) ; Colò, Gianluca (Milan U. ; INFN, Milan) et al.
The $^{46}$Ar($^3$He,d)$^{47}$K reaction was performed in inverse kinematics using a radioactive $^{46}$Ar beam produced by the SPIRAL1 facility at GANIL and a cryogenic $^{3}$He target. [...]
arXiv:2506.23228.
- 16.
Fulltext
3.
Isospin symmetry breaking in the T=1, A=70 triplet / Zimba, G L (Jyvaskyla U.) ; Ruotsalainen, P (Jyvaskyla U.) ; De Gregorio, G (Rome III U. ; INFN, Naples) ; de Angelis, G (INFN, Legnaro) ; Sarén, J (Jyvaskyla U.) ; Uusitalo, J (Jyvaskyla U.) ; Auranen, K (Jyvaskyla U.) ; Briscoe, A D (Jyvaskyla U.) ; Ge, Z (Jyvaskyla U.) ; Grahn, T (Jyvaskyla U.) et al.
Excited states in the Kr70 and Br70 nuclei were populated via the Ca40(S32,2n)Kr70 and Ca40(S32,pn)Br70 fusion-evaporation reactions at the Accelerator Laboratory of the University of Jyväskylä. The 2+⟶0+ and 4+⟶2+ transitions in Kr70 have been found to be 881(1) keV and (tentatively) 1037(2) keV, respectively. [...]
2024 - 13 p. - Published in : Phys. Rev. C 110 (2024) 024314
4.
In-beam γ-ray spectroscopy of Ac211,213 and Ra211 / Louko, J (Jyvaskyla U.) ; Auranen, K (Jyvaskyla U.) ; Uusitalo, J (Jyvaskyla U.) ; Briscoe, A D (Jyvaskyla U.) ; Grahn, T (Jyvaskyla U.) ; Greenlees, P T (Jyvaskyla U.) ; Illana, A (Jyvaskyla U.) ; Joukainen, H (Jyvaskyla U.) ; Julin, R (Jyvaskyla U.) ; Jutila, H (Jyvaskyla U.) et al.
The first in-beam γ-ray spectroscopic study of the neutron-deficient actinium isotopes Ac211,213 has been carried out at the Accelerator Laboratory of the University of Jyväskylä using a highly selective recoil-decay tagging method with the jurogam 3 germanium-detector array and MARA separator. The nuclei of interest were produced using the Lu175(Ar40,4n)Ac211 and Hf180(Cl37,4n)Ac213 fusion-evaporation reactions. [...]
2024 - 11 p. - Published in : Phys. Rev. C 110 (2024) 034311
5.
The $^{76}$Cu conundrum remains unsolved / IDS Collaboration
Near the doubly-magic nucleus \nuc{Ni}{78} ($Z=28$, $N=50$), there has been a decades-long debate on the existence of a long-lived isomer in \nuc{Cu}{76}. A recent mass measurement claimed to have settled the debate, by measuring the energy of the isomer and shedding light on the structure of the nucleus. [...]
arXiv:2505.06400.- 2025-05-09 - Published in : Phys. Lett. B 9 (2025) 139551 Fulltext: PDF;
6.
Direct measurement of three different deformations near the ground state in an atomic nucleus / Montes Plaza, Adrian (Liverpool U. ; Jyvaskyla U.) ; Pakarinen, Janne (Jyvaskyla U.) ; Papadakis, Philippos (Daresbury) ; Herzberg, Rolf-Dietmar (Liverpool U.) ; Julin, Rauno (Jyvaskyla U.) ; Rodríguez, Tomás R (Madrid U.) ; Briscoe, Andrew D (Jyvaskyla U. ; Liverpool U.) ; Illana, Andrés (Jyvaskyla U. ; Madrid U.) ; Ojala, Joonas (Jyvaskyla U.) ; Ruotsalainen, Panu (Jyvaskyla U.) et al.
Atomic nuclei serve as prime laboratories for investigations of complex quantum phenomena, where minor nucleon rearrangements cause significant structural changes. $^{190}$Pb is the heaviest known neutron-deficient Pb isotope that can exhibit three distinct shapes: prolate, oblate, and spherical, with nearly degenerate excitation energies. [...]
2025 - 9 p. - Published in : Commun. Phys. 8 (2025) 8 Fulltext: PDF;
7.
Charge radii of thallium isotopes near the N=126 shell closure / IDS Collaboration
The changes in the mean-squared charge radius of Tlg209 (N=128) and Tlm207 (N=126) relative to Tl205 have been measured for the first time using the in-source laser resonance-ionization spectroscopy technique with the Laser Ion Source and Trap (LIST) at ISOLDE (CERN). The application of the LIST suppresses the dominant background from isobaric francium isotopes and allows access to thallium nuclides with A⩾207. [...]
2024 - 9 p. - Published in : Phys. Rev. C 110 (2024) 034315 Fulltext: PDF;
8.
Shell evolution in Ge isotopes with N$\geq$50 investigated via fast-timing methods / Fraile, Luis Mario (Grupo de Física Nuclear & IPARCOS, Universidad Complutense de Madrid, Madrid, Spain) ; Benito, Jaime (Grupo de Física Nuclear & IPARCOS, Universidad Complutense de Madrid, Madrid, Spain) ; Illana, Andrés (Grupo de Física Nuclear & IPARCOS, Universidad Complutense de Madrid, Madrid, Spain)
CERN-INTC-2024-071 ; INTC-P-723.
- 2024 - mult..
Full text
9.
Detailed structure of Sn131 populated in the β decay of isomerically purified In131 states / IDS Collaboration
The excited structure of the single-hole nucleus Sn131 populated by the β− decay of In131 was investigated in detail at the ISOLDE facility at CERN. This new experiment took advantage of isomeric purification capabilities provided by resonant ionization, making it possible to independently study the decay of each isomer for the first time. [...]
2024 - 19 p. - Published in : Phys. Rev. C 110 (2024) 014328 Fulltext: PDF;
10.
On the nature of yrast states in neutron-rich polonium isotopes / IDS Collaboration
Polonium isotopes having two protons above the shell closure at $Z=82$ show a wide variety of low-lying high-spin isomeric states across the whole chain. The structure of neutron-deficient isotopes up to $^{210}$Po ($N=126$) is well established as they are easily produced through various methods. [...]
arXiv:2407.03839.- 2025-02-05 - 6 p. - Published in : Phys. Rev. Lett. 134 (2025) 052502 Fulltext: PDF;

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