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Shape evolution in even-mass $^{98-104}$Zr isotopes via lifetime measurements using the $\gamma \gamma $-coincidence technique
/ Pasqualato, G. (IJCLab, Orsay) ; Ansari, S. (IRFU, Saclay) ; Heines, J.S. (Oslo U.) ; Modamio, V. (Oslo U.) ; Görgen, A. (Oslo U.) ; Korten, W. (IRFU, Saclay) ; Ljungvall, J. (IJCLab, Orsay ; Strasbourg, IPHC) ; Clément, E. (GANIL) ; Dudouet, J. (IP2I, Lyon) ; Lemasson, A. (GANIL) et al.
The Zirconium (Z = 40) isotopic chain has attracted interest for more than four decades. The abrupt lowering of the energy of the first $2^+$ state and the increase in the transition strength B(E2; $2_1^\rightarrow 0_1^+$ going from $^{98}$Zr to $^{100}$Zr has been the first example of "quantum phase transition" in nuclear shapes, which has few equivalents in the nuclear chart. [...]
arXiv:2410.17004.-
2023-11-21 - 13 p.
- Published in : Eur. Phys. J. A 59 (2023) 276
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2.
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Low-lying electric dipole $γ$-continuum for the unstable $^{62,64}$Fe nuclei: Strength evolution with neutron number
/ Avigo, R (INFN, Milan ; Milan U.) ; Wieland, O (INFN, Milan) ; Bracco, A (INFN, Milan ; Milan U.) ; Camera, F (INFN, Milan ; Milan U.) ; Ameil, F (Darmstadt, GSI) ; Arici, T (Darmstadt, GSI) ; Ataç, A (Royal Inst. Tech., Stockholm) ; Barrientos, D (CERN) ; Bazzacco, D (INFN, Padua) ; Bednarczyk, P (Cracow, INP) et al.
The γ -ray emission from the nuclei $^{62,64}$Fe following Coulomb excitation at bombarding energy of 400-440 AMeV was measured with special focus on E 1 transitions in the energy region 4-8 MeV. The unstable neutron-rich nuclei $^{62,64}$Fe were produced at the FAIR-GSI laboratories and selected with the FRS spectrometer. [...]
2020 - 6 p.
- Published in : Phys. Lett. B 811 (2020) 135951
Fulltext from publisher: PDF;
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3.
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Manifestation of the Berry phase in the atomic nucleus $^{213}$Pb
/ Valiente-Dobón, J.J. (INFN, Legnaro) ; Gottardo, A. (INFN, Legnaro) ; Benzoni, G. (INFN, Milan) ; Gadea, A. (Valencia U., IFIC) ; Lunardi, S. (Padua U. ; INFN, Padua) ; Algora, A. (Valencia U., IFIC) ; de Angelis, G. (INFN, Legnaro) ; Bazzacco, D. (INFN, Padua) ; Benlliure, J. (Santiago de Compostela U., IGFAE) ; Boutachkov, P. (Darmstadt, GSI) et al.
The neutron-rich $^{213}$Pb isotope was produced in the fragmentation of a primary 1 GeV $A$ $^{238}$U beam, separated in FRS in mass and atomic number, and then implanted for isomer decay $\gamma$-ray spectroscopy with the RISING setup at GSI. A newly observed isomer and its measured decay properties indicate that states in $^{213}$Pb are characterized by the seniority quantum number that counts the nucleons not in pairs coupled to angular momentum $J=0$. [...]
arXiv:2010.14859.-
2021-05-10 - 7 p.
- Published in : Phys. Lett. B 816 (2021) 136183
Article from SCOAP3: PDF; Fulltext: PDF;
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4.
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Benchmarking the PreSPEC@GSI experiment for Coulex-multipolarimetry on the $\pi (p_{3/2})\rightarrow \pi (p_{1/2})$ spin-flip transition in $^{85}$Br
/ Napiralla, P (Darmstadt, Tech. Hochsch. ; Darmstadt, GSI) ; Lettmann, M (Darmstadt, Tech. Hochsch.) ; Stahl, C (Darmstadt, Tech. Hochsch.) ; Rainovski, G (Sofiya U.) ; Pietralla, N (Darmstadt, Tech. Hochsch.) ; Afara, S (King Saud U.) ; Ameil, F (Darmstadt, GSI) ; Arici, T (Darmstadt, GSI) ; Aydin, S (Aksaray U.) ; Barrientos, D (CERN) et al.
A first performance test of the Coulomb excitation multipolarimetry (Coulex-multipolarimetry) method is presented. It is based on a $^{85}\hbox {Br}\,\pi p_{3/2}\rightarrow \pi p_{1/2}$ spin-flip experiment performed as part of the PreSPEC-AGATA campaign at the GSI Helmholtzzentrum für Schwerionenforschung (GSI). [...]
2020 - 10 p.
- Published in : Eur. Phys. J. A 56 (2020) 147
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5.
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Isospin dependence of electromagnetic transition strengths among an isobaric triplet
/ Boso, A (Padua U. ; INFN, Padua ; Teddington, Natl. Phys. Lab) ; Milne, S A (York U., England) ; Bentley, M A (York U., England) ; Recchia, F (Padua U. ; INFN, Padua) ; Lenzi, S M (Padua U. ; INFN, Padua) ; Rudolph, D (Lund U.) ; Labiche, M (Daresbury) ; Pereira-Lopez, X (York U., England) ; Afara, S (King Saud U.) ; Ameil, F (Darmstadt, GSI) et al.
Electric quadrupole matrix elements, Mp , for the Jπ=2+→0+ , ΔT=0 , T=1 transitions across the A=46 isobaric multiplet 46 Cr- 46 V- 46 Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz . [...]
2019 - 6 p.
- Published in : Phys. Lett. B 797 (2019) 134835
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6.
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New spectroscopic information on $^{211,213}\mathrm{Tl}$: A changing structure beyond the $N=126$ shell closure
/ Gottardo, A (INFN, Legnaro ; Padua U.) ; Valiente-Dobón, J J (INFN, Legnaro) ; Benzoni, G (INFN, Milan) ; Morales, A I (INFN, Milan) ; Gadea, A (Valencia U., IFIC) ; Lunardi, S (Padua U. ; INFN, Padua) ; Boutachkov, P (Darmstadt, GSI) ; Bruce, A M (Brighton U.) ; Górska, M (Darmstadt, GSI) ; Grebosz, J (Cracow, INP) et al.
The neutron-rich isotopes $^{211,213}\mathrm{Tl}$, beyond the $N=126$ shell closure, have been studied for the first time in isomer $\gamma$-ray decay, exploiting the fragmentation of a primary uranium beam at the Fragment Separator-Rare Isotopes Investigation at GSI setup. The observed isomeric states in $^{211,213}\mathrm{Tl}$ show a deviation from the seniority-like scheme of $^{209}\mathrm{Tl}$. [...]
2019 - 7 p.
- Published in : Phys. Rev. C 99 (2019) 054326
Article from SCOAP3: PDF;
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7.
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$\beta$-decay half-lives and $\beta$-delayed neutron emission probabilities for several isotopes of Au, Hg, Tl, Pb and Bi, beyond $N=126$
/ Caballero-Folch, R. (Barcelona, Polytechnic U. ; TRIUMF) ; Domingo-Pardo, C. (Valencia U., IFIC) ; Agramunt, J. (Valencia U., IFIC) ; Algora, A. (Valencia U., IFIC ; Debrecen, Inst. Nucl. Res.) ; Ameil, F. (Darmstadt, GSI) ; Ayyad, Y. (U. Santiago de Compostela (main)) ; Benlliure, J. (U. Santiago de Compostela (main)) ; Bowry, M. (Surrey U.) ; Calviño, F. (Barcelona, Polytechnic U.) ; Cano-Ott, D. (Madrid, CIEMAT) et al.
$Background:$ Previous measurements of $\beta$-delayed neutron emitters comprise around 230 nuclei, spanning from the $^{8}$He up to $^{150}$La. Apart from $^{210}$Tl, with a minuscule branching ratio of 0.007\%, no other neutron emitter is measured yet beyond $A=150$. [...]
arXiv:1701.03845.-
2017-06-23 - 16 p.
- Published in : Phys. Rev. C 95 (2017) 064322
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8.
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$\beta$-decay and $\beta$-delayed Neutron Emission Measurements at GSI-FRS Beyond N=126, for r-process Nucleosynthesis
/ Caballero-Folch, R (Barcelona U.) ; Domingo-Pardo, C (Valencia U., IFIC) ; Cortès, G (Barcelona U.) ; Taín, J L (Valencia U., IFIC) ; Agramunt, J (Valencia U., IFIC) ; Algora, A (Valencia U., IFIC ; Debrecen, Inst. Nucl. Res.) ; Ameil, F (Darmstadt, GSI) ; Ayyad, Y (U. Santiago de Compostela (main)) ; Benlliure, J (U. Santiago de Compostela (main)) ; Bowry, M (Surrey U.) et al.
New measurements of very exotic nuclei in the neutron-rich region beyond N=126 have been performed at the GSI facility with the fragment separator (FRS). The aim of the experiment is to determine half-lives and beta-delayed neutron emission branching ratios of isotopes of Hg, Tl and Pb in this region. [...]
2014 - 3 p.
- Published in : Nucl. Data Sheets 120 (2014) 81-83
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9.
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First measurement of several $\beta$-delayed neutron emitting isotopes beyond N=126
/ Caballero-Folch, R. ; Domingo-Pardo, C. ; Agramunt, J. ; Algora, A. ; Ameil, F. ; Arcones, A. ; Ayyad, Y. ; Benlliure, J. ; Borzov, I.N. ; Bowry, M. et al.
The $\beta$-delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured together with $\beta$-decay half-lives for 20 isotopes of Au, Hg, Tl, Pb and Bi in the mass region N$\gtrsim$126. These are the heaviest species where neutron emission has been observed so far. [...]
arXiv:1511.01296.-
2016-06-29 - 6 p.
- Published in : Phys. Rev. Lett. 117 (2016) 012501
Fulltext: 10.1103_PhysRevLett.117.012501 - PDF; arXiv:1511.01296 - PDF; External link: Preprint
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10.
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Nuclear astrophysics with radioactive ions at FAIR
/ Reifarth, R. ; Altstadt, S. ; Göbel, K. ; Heftrich, T. ; Heil, M. ; Koloczek, A. ; Langer, C. ; Plag, R. ; Pohl, M. ; Sonnabend, K. et al.
The nucleosynthesis of elements beyond iron is dominated by neutron captures in the s and r processes. However, 32 stable, proton-rich isotopes cannot be formed during those processes, because they are shielded from the s-process flow and r-process beta-decay chains. [...]
arXiv:1310.1632.-
2016-01-05 - 12 p.
- Published in : J. Phys.: Conf. Ser. 665 (2016) 012044
Fulltext: pdf - PDF; 10.1088_1742-6596_665_1_012044 - PDF; arXiv:1310.1632 - PDF; External link: Preprint
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