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Octupole states in $^{207}$Tl studied through $β$ decay
/ Berry, T A (Surrey U.) ; Podolyák, Zs (Surrey U.) ; Carroll, R J (Surrey U.) ; Lică, R (CERN ; Bucharest, IFIN-HH) ; Brown, B A (Michigan State U.) ; Grawe, H (Darmstadt, GSI) ; Sotty, Ch (Bucharest, IFIN-HH ; Leuven U.) ; Timofeyuk, N K (Surrey U.) ; Alexander, T (Surrey U.) ; Andreyev, A N (York U., England) et al.
The $β$ decay of $^{207}$Hg into the single-proton-hole nucleus $^{207}$Tl has been studied through $γ$-ray spectroscopy at the ISOLDE Decay Station (IDS) with the aim of identifying states resulting from coupling of the $πs^{−1}_{1/2}, πd^{−1}_{3/2},$ and $πh^{−1}_{11/2}$ shell model orbitals to the collective octupole vibration. Twenty-two states were observed lying between 2.6 and 4.0 MeV, eleven of which were observed for the first time, and 78 new transitions were placed. [...]
2020 - 12 p.
- Published in : Phys. Rev. C 101 (2020) 054311
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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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Investigation of the $\Delta n = 0$ selection rule in Gamow-Teller transitions: The $\beta$-decay of $^{207}$Hg
/ Berry, T A (Surrey U.) ; Podolyák, Zs (Surrey U.) ; Carroll, R J (Surrey U.) ; Lică, R (CERN ; Bucharest, IFIN-HH) ; Grawe, H ; Timofeyuk, N K (Surrey U.) ; Alexander, T (Surrey U.) ; Andreyev, A N (York U., England) ; Ansari, S (Cologne U.) ; Borge, M J G (CERN ; Madrid, Inst. Estructura Materia) et al.
Gamow-Teller $\beta$ decay is forbidden if the number of nodes in the radial wave functions of the initial and final states is different. This $\Delta n=0$ requirement plays a major role in the $\beta$ decay of heavy neutron-rich nuclei, affecting the nucleosynthesis through the increased half-lives of nuclei on the astrophysical $r$-process pathway below both $Z=50$ (for $N>82$ ) and $Z=82$ (for $N>126$). [...]
2019 - 5 p.
- Published in : Phys. Lett. B 793 (2019) 271-275
Article from SCOAP3: PDF;
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4.
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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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Fast-timing study of the $l$-forbidden $1/2^+ \rightarrow 3/2^+ M1$ transition in $^{129}Sn$
/ Lică, R (CERN ; Bucharest, IFIN-HH) ; Mach, H (Warsaw, Inst. Nucl. Studies) ; Fraile, L M (UCM, Madrid, Dept. Phys.) ; Gargano, A (INFN, Naples) ; Borge, M J G (CERN ; Madrid, Inst. Estructura Materia) ; Mărginean, N (Bucharest, IFIN-HH) ; Sotty, C O (Bucharest, IFIN-HH ; Leuven U.) ; Vedia, V (UCM, Madrid, Dept. Phys.) ; Andreyev, A N (York U., England) ; Benzoni, G (INFN, Milan) et al.
The levels in Sn129 populated from the β− decay of In129 isomers were investigated at the ISOLDE facility of CERN using the newly commissioned ISOLDE Decay Station (IDS). The lowest 1/2+ state and the 3/2+ ground state in Sn129 are expected to have configurations dominated by the neutron s1/2 (l=0) and d3/2 (l=2) single-particle states, respectively. [...]
2016 - 7 p.
- Published in : Phys. Rev. C 93 (2016) 044303
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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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Lifetimes and shape-coexisting states of $^{99}Zr$
/ Spagnoletti, P (West Scotland U.) ; Simpson, G (LPSC, Grenoble) ; Kisyov, S (Bucharest, IFIN-HH) ; Bucurescu, D (Bucharest, IFIN-HH) ; Régis, J M (Cologne U.) ; Saed-Samii, N (Cologne U.) ; Blanc, A (Laue-Langevin Inst.) ; Jentschel, M (Laue-Langevin Inst.) ; Köster, U (Laue-Langevin Inst.) ; Mutti, P (Laue-Langevin Inst.) et al.
Lifetimes of intermediate-spin states in two rotational bands of $^{99}Zr$ have been measured. These states were populated following the neutron-induced fission of $^{235}U$ at the PF1B beamline of the Institut Laue-Langevin, Grenoble, during the EXILL-FATIMA campaign. [...]
2019 - 11 p.
- Published in : Phys. Rev. C 100 (2019) 014311
Article from SCOAP3: PDF;
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8.
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Beta-delayed proton emission from$^{20}$Mg
/ Andreyev, A (York U., England) ; Borge, M J G (Madrid, Inst. Estructura Materia ; CERN) ; Cederkäll, J (Lund U.) ; De Witte, H (Leuven U.) ; Fraile, L M (Madrid U.) ; Fynbo, H O U (Aarhus U.) ; Greenlees, P T (Helsinki Inst. of Phys. ; Jyvaskyla U.) ; Harkness-Brennan, L J (Liverpool U.) ; Howard, A M (Aarhus U.) ; Huyse, M (Leuven U.) et al.
Beta-delayed proton emission from$^{20}$ Mg has been measured at ISOLDE, CERN, with the ISOLDE Decay Station (IDS) setup including both charged-particle and gamma-ray detection capabilities. A total of 27 delayed proton branches were measured including seven so far unobserved. [...]
2016
- Published in : Eur. Phys. J. A 52 (2016) 304
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9.
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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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10.
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Identification of the crossing point at $N=21$ between normal and intruder configurations
/ Lică, R (CERN ; Bucharest, IFIN-HH) ; Rotaru, F (Bucharest, IFIN-HH) ; Borge, M J G (CERN ; Madrid, Inst. Estructura Materia) ; Grévy, S (GANIL ; CENBG, Gradignan) ; Negoiţă, F (Bucharest, IFIN-HH) ; Poves, A (Madrid, Autonoma U.) ; Sorlin, O (GANIL) ; Andreyev, A N (York U., England) ; Borcea, R (Bucharest, IFIN-HH) ; Costache, C (Bucharest, IFIN-HH) et al.
/IDS
The β− decay of Mg34 was used to study the Al34 nucleus through γ spectroscopy at the Isotope Separator On-Line facility of CERN. Previous studies identified two β-decaying states in Al34 having spin-parity assignments Jπ=4− dominated by the normal configuration π(d5/2)−1⊗ν(f7/2) and Jπ=1+ by the intruder configuration π(d5/2)−1⊗ν(d3/2)−1(f7/2)2. [...]
2017 - 6 p.
- Published in : Phys. Rev. C 95 (2017) 021301
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