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High-spin states of $^{218}$Th
/ O'Donnell, D (SUPA, UK ; Liverpool U. ; IIT, Roorkee) ; Page, R D (Liverpool U.) ; Grahn, T (Jyvaskyla U.) ; Ali, F A (Liverpool U. ; Sulaimaniya U.) ; Auranen, K (Jyvaskyla U.) ; Capponi, L (SUPA, UK) ; Carroll, R J (Liverpool U.) ; Chishti, M M R (SUPA, UK) ; Drummond, M C (Liverpool U.) ; Greenlees, P T (Jyvaskyla U.) et al.
High-spin states in the $N = 128$ nucleus $^{218}$Th have been investigated following fusion–evaporation reactions, using the recoil-decay tagging technique. Due to the short-lived nature of the ground state of $^{218}$Th prompt $\gamma$ rays have been correlated with the $\alpha$ decay of the daughter nucleus $^{214}$Ra. [...]
2020 - 12 p.
- Published in : J. Phys. G 47 (2020) 095103
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2.
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Population of a low-spin positive-parity band from high-spin intruder states in $^{177}$Au: The two-state mixing effect
/ Venhart, M (Bratislava, Inst. Phys.) ; Balogh, M (Bratislava, Inst. Phys.) ; Herzáň, A (Bratislava, Inst. Phys.) ; Wood, J L (Georgia Tech., Atlanta) ; Ali, F A (Liverpool U. ; Sulaimaniya U.) ; Joss, D T (Liverpool U.) ; Andreyev, A N (York U., England ; JAERI, Tokai) ; Auranen, K (Jyvaskyla U.) ; Carroll, R J (Liverpool U.) ; Drummond, M C (Liverpool U.) et al.
The extremely neutron-deficient isotopes $^{177,179}$Au were studied by means of in-beam γ -ray spectroscopy. Specific tagging techniques, α -decay tagging in $^{177}$Au and isomer tagging in $^{179}$Au, were used for these studies. [...]
2020 - 6 p.
- Published in : Phys. Lett. B 806 (2020) 135488
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3.
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Restoring the valence-shell stabilization in $^{140}$Nd
/ Kern, R (Darmstadt, Tech. U.) ; Zidarova, R (Darmstadt, Tech. U. ; Sofiya U.) ; Pietralla, N (Darmstadt, GSI) ; Rainovski, G (Sofiya U.) ; Stegmann, R (Darmstadt, GSI) ; Blazhev, A (Cologne U.) ; Boukhari, A (CERN) ; Cederkäll, J (CERN ; Lund U. (main)) ; Cubiss, J G (York U., England) ; Djongolov, M (Sofiya U.) et al.
A projectile Coulomb-excitation experiment was performed at the radioactive-ion beam facility HIE-ISOLDE at CERN to obtain $E2$ and $M1$ transition matrix elements of $^{140}$Nd using the multistep Coulomb-excitation code GOSIA. The absolute $M1$ strengths, $\textrm{B}(M1;2^+_2→2^+_1)=0.033(8)μ^2_N,\textrm{B}(M1;2^+_3→2^+_1)=0.26^{+0.11}_{−0.10}μ^2_N$, and $\textrm{B}(M1;2^+_4→2^+_1)<0.04μ^2_{\textrm{N}}$, identify the $2^+_3$ state as the main fragment of the one-quadrupole-phonon proton-neutron mixed-symmetry state of $^{140}$Nd. [...]
2020 - 6 p.
- Published in : Phys. Rev. C 102 (2020) 041304
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4.
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Excited states in $^{217}$Ra populated in the α decay of $^{221}$Th
/ Parr, E (West Scotland U. ; SUPA, UK) ; Smith, J F (West Scotland U. ; SUPA, UK) ; Greenlees, P T (Jyvaskyla U.) ; Auranen, K (Jyvaskyla U.) ; Chapman, R (West Scotland U. ; SUPA, UK) ; Cullen, D M (Manchester U.) ; Grahn, T (Jyvaskyla U.) ; Grocutt, L (West Scotland U. ; SUPA, UK) ; Herzáň, A (Jyvaskyla U. ; Bratislava, Inst. Phys.) ; Herzberg, R D (Liverpool U.) et al.
Fine structure in the α decay of $^{221}_{90}$Th, populating excited states in $^{217}_{88}$Ra, was studied using αγ-coincidence spectroscopy. Two α-decay branches from $^{221}$Th have been newly observed, with $E_{\alpha} \mathrm{(keV)} [b_{\alpha}(\%)]=7951(8)[0.14(3)]$ and $8247(3)[1.51(12)]$, together with three previously known branches. [...]
2020 - 12 p.
- Published in : Phys. Rev. C 102 (2020) 054335
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5.
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Isomeric 13/2$^+$ state in $^{201}$Fr
/ Auranen, K (Jyvaskyla U.) ; Jakobsson, U (Jyvaskyla U.) ; Badran, H (Jyvaskyla U.) ; Grahn, T (Jyvaskyla U.) ; Greenlees, P T (Jyvaskyla U.) ; Herzáň, A (Jyvaskyla U. ; Bratislava, Inst. Phys.) ; Julin, R (Jyvaskyla U.) ; Juutinen, S (Jyvaskyla U.) ; Konki, J (Jyvaskyla U. ; CERN) ; Leino, M (Jyvaskyla U.) et al.
We have identified an isomeric state in $^{201}$Fr for which we propose a spin and parity of $13/2^+$, and interpret it as arising from the $\pi(i_{13/2})$ configuration. A half-life of 720(40) ns was measured, corresponding to $B(M2)=0.17(2)$ W.u., in good agreement with those of other $13/2^+ \to 9/2^- [\pi (i_{13/2}) \to \pi(h_{9/2})]$ transitions observed in other nuclei in the region. [...]
2020 - 5 p.
- Published in : Phys. Rev. C 101 (2020) 024306
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6.
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High-precision half-life determination of $^{14}$O via direct $\beta $ counting
/ Sharma, S. (Regina U.) ; Grinyer, G.F. (Regina U.) ; Ball, G.C. (TRIUMF) ; Leslie, J.R. (Queen's U., Kingston) ; Svensson, C.E. (Guelph U.) ; Ali, F.A. (Guelph U. ; Sulaimaniya U.) ; Andreoiu, C. (Simon Fraser U., Dept. Chem.) ; Bernier, N. (TRIUMF ; British Columbia U. ; Western Cape U. ; Zululand U.) ; Bhattacharjee, S.S. (TRIUMF) ; Bildstein, V. (Guelph U.) et al.
The half-life of the superallowed Fermi $\beta^+$ emitter $^{14}$O was determined to high precision via a direct $\beta$ counting experiment performed at the Isotope Separator and Accelerator (ISAC) facility at TRIUMF. The result, $T_{1/2}$($^{14}$O) = 70619.2(76) ms, is consistent with, but is more precise than, the world average obtained from 11 previous measurements. [...]
arXiv:2204.06668.-
2022-05-03 - 8 p.
- Published in : Eur. Phys. J. A 58 (2022) 83
Fulltext: PDF; Publication: PDF;
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7.
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The observation of vibrating pear-shapes in radon nuclei
/ Butler, P.A. (Liverpool U.) ; Gaffney, L.P. (Liverpool U. ; CERN) ; Spagnoletti, P. (West Scotland U.) ; Konki, J. (CERN) ; Scheck, M. (West Scotland U.) ; Smith, J.F. (West Scotland U.) ; Abrahams, K. (Western Cape U.) ; Bowry, M. (TRIUMF) ; Cederkäll, J. (Lund U.) ; Chupp, T. (Michigan U.) et al.
There is a large body of evidence that atomic nuclei can undergo octupole distortion and assume the shape of a pear. This phenomenon is important for measurements of electric-dipole moments of atoms, which would indicate CP violation and hence probe physics beyond the standard model of particle physics. [...]
arXiv:2003.10147.-
2019-06-06 - 6 p.
- Published in : Nature Commun. 10 (2019) 2473
Fulltext: 2003.10147 - PDF; 7a6aa522dd658653207485bc1ee38876 - PDF; s41467-019-10494-5 - PDF;
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8.
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Deformation and mixing of coexisting shapes in neutron-deficient polonium isotopes
/ Kesteloot, N (KU Leuven, Dept. Phys. Astron. ; SCK-CEN, Mol) ; Bastin, B (KU Leuven, Dept. Phys. Astron. ; GANIL) ; Gaffney, L P (KU Leuven, Dept. Phys. Astron. ; Liverpool U.) ; Wrzosek-Lipska, K (KU Leuven, Dept. Phys. Astron. ; Warsaw U., Heavy Ion Lab) ; Auranen, K (Jyvaskyla U. ; Helsinki Inst. of Phys.) ; Bauer, C (Darmstadt, Tech. Hochsch.) ; Bender, M (CENBG, Gradignan) ; Bildstein, V (Munich, Tech. U.) ; Blazhev, A (Cologne U.) ; Bönig, S (Darmstadt, Tech. Hochsch.) et al.
Coulomb-excitation experiments are performed with postaccelerated beams of neutron-deficient Po196,198,200,202 isotopes at the REX-ISOLDE facility. A set of matrix elements, coupling the low-lying states in these isotopes, is extracted. [...]
2015 - 17 p.
- Published in : Phys. Rev. C 92 (2015) 054301
APS Open Access article: PDF;
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10.
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EuPRAXIA Conceptual Design Report
/ Assmann, R W (DESY) ; Weikum, M K (DESY) ; Akhter, T (INFN, Naples) ; Alesini, D (Frascati) ; Alexandrova, A S (Cockcroft Inst. Accel. Sci. Tech. ; U. Liverpool (main)) ; Anania, M P (Frascati) ; Andreev, N E (ITAE, Moscow ; Moscow, MIPT) ; Andriyash, I (Weizmann Inst.) ; Artioli, M (ENEA, Bologna) ; Aschikhin, A (DESY) et al.
This report presents the conceptual design of a new European research infrastructure EuPRAXIA. The concept has been established over the last four years in a unique collaboration of 41 laboratories within a Horizon 2020 design study funded by the European Union. [...]
2020 - 610 p.
- Published in : Eur. Phys. J. Spec. Top. 229 (2020) 3675-4284
- Published in : Eur. Phys. J. Spec. Top. 229 (2020) 11-31
Fulltext from Publisher: PDF;
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