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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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Quadrupole and octupole collectivity in the semi-magic nucleus 80206Hg126
/ Morrison, L (Surrey U.) ; Hadyńska-Klȩk, K (Warsaw U., Heavy Ion Lab ; Surrey U.) ; Podolyák, Zs (Surrey U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Zielińska, M (IRFU, Saclay) ; Brown, B A (Michigan State U., East Lansing (main)) ; Grawe, H (Darmstadt, GSI) ; Stevenson, P D (Surrey U.) ; Berry, T (Surrey U.) ; Boukhari, A (CSNSM, Orsay) et al.
The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus 206Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states in 206Hg were observed. [...]
2023 - 5 p.
- Published in : Phys. Lett. B 838 (2023) 137675
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3.
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Neutron emission from unbound states in 135Sn
/ Grzywacz, Robert (Dept of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee) ; Korgul, A (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Madurga, M (Dept of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee) ; Fraile, L M (Grupo de Física Nuclear & IPARCOS, Universidad Complutense de Madrid, Spain) ; Xu, Z (Dept of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee) ; Piersa-Siłkowska, M (Faculty of Physics, University of Warsaw, Warsaw, Poland) ; Benito, J (Grupo de Física Nuclear & IPARCOS, Universidad Complutense de Madrid, Spain) ; Algora, A (Instituto de Física Corpuscular, Edificio de Institutos de Paterna, Valencia, Spain) ; Allmond, J M (Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee USA) ; Bardayan, D (Institute for Struct and Nuc Astrophysics, Dept of Physics, Notre Dame, Indiana, USA) et al.
CERN-INTC-2021-050 ; INTC-P-614.
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2021.
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Low-spin states in $^{80}$Ge populated in the $\beta$ decay of the $^{80}$Ga $3^-$ isomer
/ Sekal, S (Algiers U. Sci. Tech. ; CERN) ; Fraile, L M (Madrid U.) ; Lică, R (CERN ; Bucharest, IFIN-HH) ; Borge, M J G (Madrid, Inst. Estructura Materia) ; Walters, W B (Maryland U., Dept. Chem.) ; Aprahamian, A (Notre Dame U.) ; Benchouk, C (Algiers U. Sci. Tech.) ; Bernards, C (Yale U. (main) ; Cologne U.) ; Briz, J A (Madrid, Inst. Estructura Materia) ; Bucher, B (Idaho Natl. Lab.) et al.
The structure of
$^{80}$Ge has been investigated at the ISOLDE facility at CERN. A previous study reported for the first time a low-lying $0^+_2$ intruder state at 639 keV, based on the coincidence with a previously unobserved 1764-keV $γ$ ray, and suggested it as evidence for shape coexistence in $^{80}$Ge. [...]
2021 - 12 p.
- Published in : Phys. Rev. C 104 (2021) 024317
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5.
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Dealing with contaminants in Coulomb excitation of radioactive beams
/ Morrison, L (Surrey U.) ; Hadynska-Klek, K (Warsaw U. (main) ; Surrey U.) ; Podolyák, Zs (Surrey U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Kaya, L (Cologne U.) ; Berry, T (Surrey U.) ; Boukhari, A (Orsay) ; Brunet, M (Surrey U.) ; Canavan, R (Surrey U. ; Teddington, Natl. Phys. Lab) ; Catherall, R (CERN) et al.
Data analysis of the Coulomb excitation experiment of the exotic $^{206}$Hg nucleus, recently performed at CERN’s HIE-ISOLDE facility, needs to account for the contribution to target excitation due to the strongly-present beam contaminant $^{130}$Xe. In this paper, the contamination subtraction procedure is presented..
2020 - 7 p.
- Published in : J. Phys. : Conf. Ser. 1643 (2020) 012146
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In : International Nuclear Physics Conference 2019, Glasgow, United Kingdom, 29 Jul - 2 Aug 2019, pp.012146
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6.
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$^{208}$Po populated through EC/β$^{+}$ decay
/ Brunet, M (Surrey U.) ; Berry, T A (Surrey U.) ; Podolyák, Zs (Surrey U.) ; Carroll, R J (Surrey U.) ; Lica, R (CERN ; Bucharest, IFIN-HH) ; Sotty, Ch (Bucharest, IFIN-HH ; Leuven U.) ; Andreyev, A N (York U., England) ; Borge, M J G (CERN) ; Cubiss, J G (CERN ; York U., England) ; Fraile, L M (Madrid U.) et al.
The structure of $^{208}$Po resulting from the EC/β + decay of $^{208}$At was studied at CERN’s ISOLDE Decay Station (IDS). The high statistics afforded by the high yield of $^{208}$At and the high efficiency HPGe clusters at the IDS allowed for greater insight into lower intensity transitions and thus significant expansion of the $^{208}$Po level scheme. [...]
2020 - 7 p.
- Published in : J. Phys. : Conf. Ser. 1643 (2020) 012116
Fulltext from publisher: PDF;
In : International Nuclear Physics Conference 2019, Glasgow, United Kingdom, 29 Jul - 2 Aug 2019, pp.012116
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7.
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Competition between allowed and first-forbidden $β$ decays of $^{208}$At and expansion of the $^{208}$Po level scheme
/ Brunet, M (Surrey U.) ; Podolyák, Zs (Surrey U.) ; Berry, T A (Surrey U.) ; Brown, B A (Michigan State U., NSCL) ; Carroll, R J (Surrey U.) ; Lica, R (CERN ; Bucharest, IFIN-HH) ; Sotty, Ch (Bucharest, IFIN-HH ; Leuven U.) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Borge, M J G (CERN) ; Cubiss, J G (CERN ; Madrid U.) et al.
The structure of $^{208}$Po populated through the EC/$β^+$ decay of $^{208}$At is investigated using $γ$-ray spectroscopy at the ISOLDE Decay Station. The presented level scheme contains 27 new excited states and 43 new transitions, as well as a further 50 previously observed $γ$ rays which have been (re)assigned a position. [...]
2021 - 13 p.
- Published in : Phys. Rev. C 103 (2021) 054327
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8.
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Quadrupole deformation of $^{130}$Xe measured in a Coulomb-excitation experiment
/ Morrison, L (Surrey U.) ; Hadyńska-Klȩk, K (Warsaw U., Heavy Ion Lab ; Surrey U.) ; Podolyák, Zs (Surrey U.) ; Doherty, D T (Surrey U.) ; Gaffney, L P (Liverpool U. ; CERN) ; Kaya, L (Cologne U.) ; Próchniak, L (Warsaw U., Heavy Ion Lab) ; Samorajczyk-Pyśk, J (Warsaw U., Heavy Ion Lab) ; Srebrny, J (Warsaw U., Heavy Ion Lab) ; Berry, T (Surrey U.) et al.
Low-lying states in the isotope $^{130}$Xe were populated in a Coulomb-excitation experiment performed at CERN's HIE-ISOLDE facility. The magnitudes and relative signs of seven $E2$ matrix elements and one $M1$ matrix element coupling five low-lying states in $^{130}$Xe were determined using the semiclassical coupled-channel Coulomb-excitation least-squares search code gosia. [...]
2020 - 13 p.
- Published in : Phys. Rev. C 102 (2020) 054304
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9.
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Competition between Allowed and First-Forbidden $β$ Decay: The Case of $^{208}$Hg$→^{208}$Tl
/ Carroll, R J (Surrey U.) ; Podolyák, Zs (Surrey U. ; Darmstadt, GSI) ; Berry, T (Surrey U.) ; Grawe, H (Darmstadt, GSI) ; Alexander, T (Surrey U.) ; Andreyev, A N (York U., England ; JAEA, Ibaraki) ; Ansari, S (Cologne U.) ; Borge, M J G (CERN) ; Brunet, M (Surrey U.) ; Creswell, J R (Liverpool U.) et al.
The $β$ decay of $^{208}$Hg into the one-proton hole, one neutron-particle $^{208}_{81}$Tl$_{127}$ nucleus was investigated at CERN-ISOLDE. Shell-model calculations describe well the level scheme deduced, validating the proton-neutron interactions used, with implications for the whole of the N>126, Z<82 quadrant of neutron-rich nuclei. [...]
2020 - 6 p.
- Published in : Phys. Rev. Lett. 125 (2020) 192501
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10.
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Spectroscopy of Neutron Induced Reactions with the $\nu $-ball Spectrometer
/ Jovančević, N (Orsay, IPN ; U. Paris-Saclay) ; Lebois, M (Orsay, IPN ; U. Paris-Saclay) ; Wilson, J N (Orsay, IPN ; U. Paris-Saclay) ; Thisse, D (Orsay, IPN ; U. Paris-Saclay) ; Qi, L (Orsay, IPN ; U. Paris-Saclay) ; Matea, I (Orsay, IPN ; U. Paris-Saclay) ; Ibrahim, F (Orsay, IPN ; U. Paris-Saclay) ; Verney, D (Orsay, IPN ; U. Paris-Saclay) ; Babo, M (Orsay, IPN ; U. Paris-Saclay) ; Delafosse, C (Orsay, IPN ; U. Paris-Saclay) et al.
The $\nu$-ball is a high-efficiency hybrid spectrometer which consists of both germanium (Ge) detectors and associated anti-Compton BGO shields, coupled to lanthanum bromide (LaBr$_3$) detectors. The hybrid configuration provides a combination of both excellent energy and timing resolutions. [...]
Acta Physica Polonica B Editorial Office, 2019 - 8 p.
- Published in : Acta Phys. Pol. B 50 (2019) 297
In : Zakopane Conference on Nuclear Physics : Extremes of the Nuclear Landscape, Zakopane, Poland, 26 Aug - 2 Sep 2018, pp.297
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