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1.
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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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2.
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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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3.
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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
Fulltext from publisher: PDF;
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4.
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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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5.
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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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6.
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7.
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Decay of the $N=126, ^{213}$Fr nucleus
/ Pragati, (IIT, Roorkee) ; Deo, A Y (IIT, Roorkee) ; Podolyák, Zs (Surrey U) ; Walker, P M (Surrey U) ; Algora, A (Valencia U., IFIC) ; Rubio, B (Valencia U., IFIC) ; Agramunt, J (Valencia U., IFIC) ; Fraile, L M (Madrid U.) ; Al-Dahan, N (Surrey U.) ; Alkhomashi, N (Surrey U.) et al.
γ rays following the EC/β+ and α decay of the $N = 126, ^{213}$Fr nucleus have been observed at the CERN isotope separator on-line (ISOLDE) facility with the help of γ-ray and conversion-electron spectroscopy. These γ rays establish several hitherto unknown excited states in $^{213}$Rn. [...]
2016 - 8 p.
- Published in : Phys. Rev. C 94 (2016) 064316
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8.
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The Collinear Resonance Ionization Spectroscopy (CRIS) experimental setup at CERN-ISOLDE
/ Cocolios, T E (Manchester U. ; CERN) ; Neyens, G (Louvain U.) ; Procter, T J (Manchester U.) ; Rothe, S (CERN ; Mainz U., Inst. Phys.) ; Garcia Ruiz, R F (Louvain U.) ; Stroke, H H (New York U.) ; Rossel, R E (CERN ; Mainz U., Inst. Phys.) ; Heylen, H (Louvain U.) ; Franchoo, S (Orsay, IPN) ; Marsh, B A (CERN) et al.
The CRIS setup at CERN-ISOLDE is a laser spectroscopy experiment dedicated to the high-resolution study of the spin, hyperfine structure and isotope shift of radioactive nuclei with low production rates (a few per second). It combines the Doppler-free resolution of the in-flight collinear geometry with the high detection efficiency of resonant ionisation. [...]
2013
- Published in : Nucl. Instrum. Methods Phys. Res., B 317 (2013) 565-569
In : 16th International Conference on Electromagnetic Isotope Separators and Techniques Related to their Applications, Matsue, Japan, 2 - 7 Dec 2012, pp.565-569
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9.
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A dedicated decay-spectroscopy station for the collinear resonance ionization experiment at ISOLDE
/ Rajabali, M.M (Leuven U.) ; Billowes, J (Manchester U.) ; Bissell, M.L (Leuven U.) ; Cocolios, T.E (CERN) ; De Schepper, S (Leuven U.) ; Dewolf, K (Leuven U.) ; Flanagan, K.T (Manchester U.) ; Le Blanc, F (Orsay, IPN ; Orsay, LPT) ; Lynch, K.M (Manchester U ; CERN) ; Marsh, B.A (CERN) et al.
A new decay-spectroscopy station (DSS) has been developed to be coupled to the collinear resonance ionization spectroscopy (CRIS) beam line at CERN-ISOLDE. The system uses a rotatable wheel with ten 20@mg/cm^2 carbon foils as beam implantation sites for the efficient measurement of charged decay products. [...]
2013 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 707 (2013) 35-39
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10.
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Mixing effects on K-forbidden transition rates from the 6+ isomers in the N = 104 isotones
/ Chen, Fang-Qi (Shanghai Jiaotong U.) ; Dracoulis, G.D (Australian Natl. U., Canberra) ; Sheikh, J.A (Kashmir U ; Tennessee U.) ; Shimizu, Y.R (Kyushu U.) ; Sun, Yang (Tennessee U ; Lanzhou, Inst. Modern Phys ; Shanghai Jiaotong U.) ; Walker, P.M (CERN ; Surrey U.)
The problem of the very different E2 decay rates from the two-quasineutron K(I ) = 6(+) isomers in the N = 104 isotones (172)Er, (174)Yb, (176)Hf, and (178)W is investigated using the triaxial projected shell model with inclusion of multi-quasiparticle configurations. It is demonstrated that the highly K-forbidden transition from the 6(+) isomer to the ground-state band is sensitive to mixing with the 6(+) state of the l-vibrational band. [...]
2013 - 12 p.
- Published in : J. Phys. G 40 (2013) 015101
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