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NSR database version of April 11, 2024.

Search: Author = A.Barzakh

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2024SK01      Phys.Rev. C 109, 024315 (2024)

L.V.Skripnikov, A.E.Barzakh

Reexamination of nuclear magnetic dipole and electric quadrupole moments of polonium isotopes

doi: 10.1103/PhysRevC.109.024315
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2024YU02      Phys.Lett. B 849, 138452 (2024)

Z.Yue, A.N.Andreyev, A.E.Barzakh, I.N.Borzov, J.G.Cubiss, A.Algora, M.Au, M.Balogh, S.Bara, R.A.Bark, C.Bernerd, M.J.G.Borge, D.Brugnara, K.Chrysalidis, T.E.Cocolios, H.De Witte, Z.Favier, L.M.Fraile, H.O.U.Fynbo, A.Gottardo, R.Grzywacz, R.Heinke, A.Illana, P.M.Jones, D.S.Judson, A.Korgul, U.Koster, M.Labiche, L.Le, R.Lica, M.Madurga, N.Marginean, B.Marsh, C.Mihai, E.Nacher, C.Neacsu, C.Nita, B.Olaizola, J.N.Orce, C.A.A.Page, R.D.Page, J.Pakarinen, P.Papadakis, G.Penyazkov, A.Perea, M.Piersa-Silkowska, Zs.Podolyak, S.D.Prosnyak, E.Reis, S.Rothe, M.Sedlak, L.V.Skripnikov, C.Sotty, S.Stegemann, O.Tengblad, S.V.Tolokonnikov, J.M.Udias, P.Van Duppen, N.Warr, W.Wojtaczka

Magnetic moments of thallium isotopes in the vicinity of magic N=126

NUCLEAR MOMENTS 207,209Tl; measured frequencies; deduced magnetic dipole moments. Comparison with the self-consistent theory of finite Fermi systems based on the energy density functional. The in-source laser resonance-ionization spectroscopy technique with the Laser Ion Source and Trap (LIST) at ISOLDE (CERN).

doi: 10.1016/j.physletb.2024.138452
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2023CU04      Phys.Rev.Lett. 131, 202501 (2023)

J.G.Cubiss, A.N.Andreyev, A.E.Barzakh, P.Van Duppen, S.Hilaire, S.Peru, S.Goriely, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, M.Huyse, N.Imai, D.T.Joss, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, G.G.O'Neill, R.D.Page, S.D.Prosnyak, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, L.V.Skripnikov, A.Stott, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Deformation versus Sphericity in the Ground States of the Lightest Gold Isotopes

NUCLEAR MOMENTS 176,177,178,179,180,181,182,183,187,191,193,195Au [from U(p, X), E=1.4 GeV]; measured frequencies; deduced mean-squared charge radii, ground-state deformations, nuclear magnetic moments. Comparison with available data. The in-source, resonance-ionization laser spectroscopy technique, at the ISOLDE facility (CERN).

doi: 10.1103/PhysRevLett.131.202501
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2023DE06      Phys.Rev. C 107, 024307 (2023)

Yu.A.Demidov, M.G.Kozlov, A.E.Barzakh, V.A.Yerokhin

Bohr-Weisskopf effect in the potassium isotopes

ATOMIC PHYSICS K; calculated hyperfine structure constants taking into account the Bohr-Weisskopf and Breit-Rosenthal effects. Dirac-Hartree-Fock, Dirac-Hartree-Fock plus second order many-body perturbation theory (MBPT), and Dirac-Hartree-Fock plus linearized single double coupled-clusters methods. Comparison to experimental results obtained for 39K.

NUCLEAR MOMENTS 38,44,46,47,48,49,51K; analyzed experimental data on hyperfine structure constants; deduced nuclear magnetic moments with taking into account corrections caused by relative hyperfine anomaly.

doi: 10.1103/PhysRevC.107.024307
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2022HU09      Phys.Lett. B 833, 137345 (2022)

H.Huang, W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, Z.H.Li, C.Y.Guo, A.E.Barzakh, P.Van Duppen, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, J.G.Cubiss, B.Ding, D.T.Doherty, Z.Favier, F.Giacoppo, T.H.Huang, B.Kindler, F.G.Kondev, T.Lauritsen, J.G.Li, G.S.Li, B.Lommel, H.Y.Lu, M.Al Monthery, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, Q.B.Zeng, X.H.Yu, F.F.Zeng, X.H.Zhou

First observation of the decay of the 13/2+ isomer in 183Hg and B(M2) systematics of neutron transitions across the nuclear chart

RADIOACTIVITY 183Hg(α) [from 187Pb α decay]; 187mPb(α) [from 142Nd(50Cr, 3n2pγ), E=255 MeV, followed by separation of fragments using Argonne gas-filled analyzer (AGFA) at the ATLAS-ANL facility]; measured reaction products, evaporation residues (EVRs), Eα, Iα, (EVR)α-correlations, αγ(t), Eγ, Iγ, x rays, T1/2 using double-sided silicon strip detector (DSSD), and four HPGe clover detectors. 183,183mHg; deduced levels, isomer, J, π, T1/2 of g.s. and isomer, α branching ratio, K-conversion coefficient, multipolarity, B(M2), Nilsson configurations. 187mPb; deduced T1/2. Systematics of decay schemes of 13/2+ isomers in 175,177,179,181,183,185Hg. Systematics of B(M2) values for 7/2-, 9/2+, 11/2- and 13/2+ isomers in even-Z, odd-N nuclei: 25Mg, 33Si, 33,35S, 37Ar, 39Ca, 59Cr, 61Fe, 63,67Ni, 63,65,67Zn, 67,69,71Ge, 69,71Se, 97,99Mo, 99,101,103Ru, 103,105Pd, 107,109Cd, 109,111,113,115Sn, 153Yb, 161Hf, 163W, 163Os, 171,189,191Pt, 181,183,201,203,205Hg, 209Pb, 205,207,211Po, 207,209,213Rn, 209,211Ra, 211,213Th.

doi: 10.1016/j.physletb.2022.137345
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2022VE01      Phys.Rev. C 105, 034338 (2022)

M.Venhart, A.N.Andreyev, J.G.Cubiss, J.L.Wood, A.E.Barzakh, C.Van Beveren, T.E.Cocolios, R.P.de Groote, D.V.Fedorov, V.N.Fedosseev, R.Ferrer, D.A.Fink, L.Ghys, M.Huyse, U.Koster, J.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, P.L.Molkanov, T.J.Procter, E.Rapisarda, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, P.Van Duppen, M.Veselsky

Decay modes of the 9/2- isomeric state in 183Tl

RADIOACTIVITY 183mTl(IT), (α)[from U(p, F), E=1.4 GeV]; measured Eg, Iγ, ce, Eα, Iα, γγ-coin, ceγ-coin, αγ-coin; deduced branching ratios, T1/2, reduced transition widths and hindrance factor for α-decay branch. 183Tl; deduced levels, J, π, δ, ICC, B(E3). Systematics of 9/2- isomers in neutron-deficient odd-mass Tl isotopes. Comparison to 182mHg decay and other experimental data. Selective laser resonance ionization and mass separation at ISOLDE (CERN).

doi: 10.1103/PhysRevC.105.034338
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2022ZH22      Phys.Lett. B 829, 137129 (2022)

W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, H.Huang, Z.H.Li, J.G.Li, C.Y.Guo, D.T.Doherty, A.E.Barzakh, P.Van Duppen, J.G.Cubiss, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, B.Ding, Z.Favier, F.Giacoppo, T.H.Huang, X.H.Yu, B.Kindler, F.G.Kondev, T.Lauritsen, G.S.Li, B.Lommel, H.Y.Lu, M.Al Monthery, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, Q.B.Zeng, X.H.Zhou

First observation of a shape isomer and a low-lying strongly-coupled prolate band in neutron-deficient semi-magic 187Pb

NUCLEAR REACTIONS 142Nd(50Cr, 3n2p)187Pb, E=255 MeV beam from ATLAS-ANL facility, followed by separation of evaporation residues (EVRs) using Argonne Gas-Filled Analyzer; measured Eα, Eγ, Iγ, x rays, αγ-coin, γγ-coin, T1/2 of a new low-energy microsec-isomer by αγ(t) using Gammasphere for γ detection and double-sided silicon strip detector (DSSD) for EVRs and α particles. Recoil-decay tagging (RDT) and isomer-decay tagging (IDT) methods. 187Pb; deduced high-spin levels, J, π, isomer, K-conversion coefficient, multipolarity, bands, B(E2), B(M1)/B(E2), triple-shape coexistence at low energy. Comparison with band structure in 185Hg. Systematics of aligned angular momenta plots and experimental Routhians for bands in 183,185Hg, 187Pb. 184Hg, 186Pb, 187Tl; observed γ rays. 186,187m,188Pb; observed α-decay peaks.

doi: 10.1016/j.physletb.2022.137129
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2022ZH46      Phys.Rev. C 106, 024317 (2022)

W.Q.Zhang, A.N.Andreyev, Z.Liu, D.Seweryniak, H.Huang, Z.H.Li, J.G.Li, C.Y.Guo, A.E.Barzakh, P.Van Duppen, M.Al Monthery, B.Andel, S.Antalic, M.Block, A.Bronis, M.P.Carpenter, P.Copp, J.G.Cubiss, B.Ding, D.T.Doherty, Z.Favier, F.Giacoppo, T.H.Huang, B.Kindler, F.G.Kondev, T.Lauritsen, G.S.Li, B.Lommel, H.Y.Lu, P.Mosat, Y.F.Niu, C.Raison, W.Reviol, G.Savard, S.Stolze, G.L.Wilson, H.Y.Wu, Z.H.Wang, F.R.Xu, X.H.Yu, Q.B.Zeng, X.H.Zhou

Identification of excited states in 188Bi and 188Po

NUCLEAR REACTIONS 142Nd(50Cr, 3np)188Bi, (50Cr, 4n)188Po, E=255 MeV; measured evaporation residues (EVRs), Eα, Eγ, Iγ, x rays, (EVR)γ-coin, αγ-coin, γγ-coin, using four clover HPGe detectors, Gammasphere array with 64 Compton-suppressed HPGe detectors, and DSSD and DSSD+Sibox at the ATLAS-ANL accelerator facility. 186,187,187m,188Pb, 189,189mBi; deduced recoil-decay tagging (RDT) γ-ray yields. 188Bi; deduced levels, J, π, isomer, T1/2 and decay modes of isomer, K-conversion coefficients, multipolarities, configurations. 188Po; deduced energy of the first 2+ level. 186Pb; deduced levels, J, π. 183,184,186Hg, 186,187,187m,188Pb, 188,189,189mBi; observed Eα. Systematics of 9/2-, 1/2+, 7/2- and 13/2+ level energies in 185,187,189,191,193,195Bi, and those of first 2+, 4+, 6+ and 8+, second 0+, 2+ and 4+ in 188,190,192,194,196,198,200,202,204,206,208,210Po.

doi: 10.1103/PhysRevC.106.024317
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2021BA45      Phys.Rev.Lett. 127, 192501 (2021)

A.Barzakh, A.N.Andreyev, C.Raison, J.G.Cubiss, P.Van Duppen, S.Peru, S.Hilaire, S.Goriely, B.Andel, S.Antalic, M.Al Monthery, J.C.Berengut, J.Bieron, M.L.Bissell, A.Borschevsky, K.Chrysalidis, T.E.Cocolios, T.Day Goodacre, J.-P.Dognon, M.Elantkowska, E.Eliav, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, L.P.Gaffney, R.F.Garcia Ruiz, M.Godefroid, C.Granados, R.D.Harding, R.Heinke, M.Huyse, J.Karls, P.Larmonier, J.G.Li, K.M.Lynch, D.E.Maison, B.A.Marsh, P.Molkanov, P.Mosat, A.V.Oleynichenko, V.Panteleev, P.Pyykko, M.L.Reitsma, K.Rezynkina, R.E.Rossel, S.Rothe, J.Ruczkowski, S.Schiffmann, C.Seiffert, M.D.Seliverstov, S.Sels, L.V.Skripnikov, M.Stryjczyk, D.Studer, M.Verlinde, S.Wilman, A.V.Zaitsevskii

Large Shape Staggering in Neutron-Deficient Bi Isotopes

NUCLEAR MOMENTS 187,188,189,191Bi; measured frequencies. 209Bi; deduced hfs, mean-square charge radii, magnetic dipole, and electric quadrupole moments. Comparison with HFB PES calculations, available data.

doi: 10.1103/PhysRevLett.127.192501
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2021DA01      Phys.Rev.Lett. 126, 032502 (2021)

T.Day Goodacre, A.V.Afanasjev, A.E.Barzakh, B.A.Marsh, S.Sels, P.Ring, H.Nakada, A.N.Andreyev, P.Van Duppen, N.A.Althubiti, B.Andel, D.Atanasov, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, M.Huyse, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, P.L.Molkanov, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, F.Wienholtz, R.N.Wolf, A.Zadvornaya, K.Zuber

Laser Spectroscopy of Neutron-Rich 207, 208Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N = 126 Shell Closure

NUCLEAR MOMENTS 202,203,206,207,208Hg; measured frequencies; deduced hyperfine spectra, mean-square charge radii. Comparison with relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, available data.

doi: 10.1103/PhysRevLett.126.032502
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2021DA16      Phys.Rev. C 104, 054322 (2021)

T.Day Goodacre, A.V.Afanasjev, A.E.Barzakh, L.Nies, B.A.Marsh, S.Sels, U.C.Perera, P.Ring, F.Wienholtz, A.N.Andreyev, P.Van Duppen, N.A.Althubiti, B.Andel, D.Atanasov, R.S.Augusto, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, A.Gottberg, M.Huyse, S.Kreim, P.Kunz, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, T.M.Medonca, P.L.Molkanov, M.Mougeot, J.P.Ramos, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, R.N.Wolf, A.Zadvornaya, K.Zuber

Charge radii, moments, and masses of mercury isotopes across the N=126 shell closure

NUCLEAR MOMENTS 198,202,203,206,207,208Hg; measured hyperfine structure spectra using Versatile Arc Discharge and Laser Ion Source (VADLIS) in CERN-ISOLDE Resonance Ionization Laser Ion Source (RILIS) mode; deduced isotope shifts (δν) and charge radii (δ<r2) with respect to 198Hg, hyperfine factors a and b, static magnetic dipole (μ) and electric quadrupole (Q) moments for the ground states of 203Hg and 207Hg, Comparison of g factors with Schmidt values for 207Hg, 209Pb, 210Bi and 211Po, and charge radii, and odd-even staggering (OES) of the mean square charge radii with relativistic Hartree-Bogoliubov (RHB) calculations using DD-ME2, DD-MEδ, DD-PC1 and NL3* covariant energy-density functionals for 197,198,199,200,201,202,203,204,205,206,207,208,209,210,211,212,213,214Pb, 201,202,203,204,205,206,207,208,209,210Hg. Source of Hg isotopes were produced in Pb(p, X), E=1.4 GeV reaction, and using VADLIS+RILIS ion source, followed by separation of fragments using ISOLDE General Purpose Separator. 183,184,185,202,203,206,207,208Hg; measured ionization and release efficiency as a function of the half-life of mercury isotopes from a molten lead target, and compared with ABRABLA, FLUKA, and GEANT4 simulations.

ATOMIC MASSES 206,207,208Hg, 208Pb; measured time-of-flight ion-cyclotron resonances, with reference to 208Pb using the RILIS+VADIS ion source and ISOLTRAP MR-ToF mass spectrometer (MS) at CERN-ISOLDE; deduced mass excesses for 206,207,208Hg, and compared with AME2020 values.

doi: 10.1103/PhysRevC.104.054322
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2021HA32      Phys.Rev. C 104, 024326 (2021)

R.D.Harding, A.N.Andreyev, A.E.Barzakh, J.G.Cubiss, P.Van Duppen, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, T.E.Cocolios, T.Day Goodacre, K.Dockx, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, J.D.Johnson, D.T.Joss, M.Huyse, N.Imai, K.M.Lynch, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, G.G.O'Neill, R.D.Page, R.E.Rossel, S.Rothe, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen

Laser-assisted nuclear decay spectroscopy of 176, 177, 179Au

RADIOACTIVITY 179Au(α), (EC), (β+); 177,177m,176,176mAu, 176,177,179Pt, 173,173m,172,172mIr(α)[179,177,176Au laser ionized and mass-separated beams from U(p, X), E=1.4 GeV, followed by separation of products using Resonance Ionization Laser Ion Source (RILIS) and General Purpose Separator (GPS) at the Windmill decay station of ISOLDE-CERN facility]; measured Eα, Iα, K-x rays, Eγ, Iγ, αγ-coin. 179Pt, 175,173,172Ir, 175Os, 169,168Re; deduced levels, J, π, α-hindrance factors, reduced α-widths, conversion coefficients, multipolarities. 176,176mAu; deduced α-decay branching ratios for the low-spin and high-spin states. 179Au; measured half-life of the decay of the ground state. Systematics of α-reduced widths for 171,173,175,176,177,179Au α decays.

NUCLEAR MOMENTS 176,176mAu; measured in-source laser spectroscopy of hyperfine structure; deduced nuclear magnetic moments, spins and configurations for the high- and low-spin states.

doi: 10.1103/PhysRevC.104.024326
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2021SK01      Phys.Rev. C 104, 034316 (2021)

L.V.Skripnikov, A.V.Oleynichenko, A.V.Zaitsevskii, D.E.Maison, A.E.Barzakh

Relativistic Fock space coupled-cluster study of bismuth electronic structure to extract the Bi nuclear quadrupole moment

NUCLEAR MOMENTS 209Bi; calculated electric field gradient for the ground and excited electronic states of neutral bismuth; deduced nuclear quadrupole moment (NQM) for 209Bi from field gradient in the present work and available atomic hyperfine splittings, compared with value from molecular data. Fock space coupled-cluster method with single, double, and triple amplitudes (FS-CCSDT) method within the Dirac-Coulomb-Breit Hamiltonian. 202,203,204,205,206,207,208,210,210m,212,213Bi; deduced improved nuclear quadrupole moments by using measured electric quadrupole hyperfine constants 'B' for ground electronic states, and considering uncertainties for electric-field gradients (EFGs); deduced crucial importance of inclusion of triple cluster amplitudes.

doi: 10.1103/PhysRevC.104.034316
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2020AN12      Phys.Rev. C 102, 014319 (2020)

B.Andel, A.N.Andreyev, S.Antalic, M.Al Monthery, A.Barzakh, M.L.Bissell, K.Chrysalidis, T.E.Cocolios, J.G.Cubiss, T.Day Goodacre, N.Dubray, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, L.P.Gaffney, R.F.Garcia Ruiz, S.Goriely, C.Granados, R.D.Harding, R.Heinke, S.Hilaire, M.Huyse, J.-F.Lemaitre, K.M.Lynch, B.A.Marsh, P.Molkanov, P.Mosat, S.Peru, C.Raison, S.Rothe, C.Seiffert, M.D.Seliverstov, S.Sels, D.Studer, J.Sundberg, P.Van Duppen

β-delayed fission of isomers in 188Bi

RADIOACTIVITY 188,188m,190,190mBi(α), (β+F)[from U(p, X), E=1.4 GeV using RILIS and HRS separators at ISOLDE-CERN facility]; measured Eα, Iα, fission fragment energies, (fission fragment)(fission fragment)-coin; deduced partial T1/2 of β+-delayed fission (βDF) mode, βDF probabilities. 188Pb; deduced mean total kinetic energy and fission fragment mass distribution after 188Bi β-decay of high-spin isomer of 188Bi, limits of βDF partial half-lives of the two activities in 190Bi. Comparison of partial βDF partial half-lives with calculations based on HFB and QRPA, and those of fragment mass distribution with SPY and FRLDM-based calculations. Systematics of βDF partial T1/2 in neutron deficient nuclei in Tl, Bi, At, Fr, Np, Am, Bk, Es and Md isotopes. 182,184,186,188,190,192Pb; calculated theoretical pre-neutron-emission fission fragment mass distributions (FFMDs) with the SPY model using the D1M-Gogny interaction, and with the FRLDM model.

doi: 10.1103/PhysRevC.102.014319
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2020BA17      Phys.Rev. C 101, 034308 (2020)

A.E.Barzakh, D.Atanasov, A.N.Andreyev, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, K.Blaum, T.E.Cocolios, J.G.Cubiss, P.Van Duppen, T.Day Goodacre, A.de Roubin, Yu.A.Demidov, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, D.T.Joss, F.Herfurth, M.Huyse, N.Imai, M.G.Kozlov, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, R.D.Page, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Hyperfine anomaly in gold and magnetic moments of Iπ = 11/2- gold isomers

NUCLEAR MOMENTS 177m,191m,193m,195mAu; measured hyperfine structure spectra (hfs), hyperfine splitting, differential hyperfine anomaly, magnetic dipole moments using in-source laser resonance-ionization spectroscopy (RILIS) at CERN-ISOLDE. Mass separated Au beams were produced in U(p, X), E=1.4 GeV reaction, and delivered to either the ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer (MR-ToF MS) or the Windmill (WM) decay station. Comparison to the previously measured magnetic moments. 185,186,187,189,189m,191,193,194Au; re-evaluated previously measured magnetic dipole moments by properly accounting for the hyperfine anomaly.

doi: 10.1103/PhysRevC.101.034308
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2020BA29      Phys.Rev. C 101, 064321 (2020)

A.E.Barzakh, D.Atanasov, A.N.Andreyev, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, K.Blaum, T.E.Cocolios, J.G.Cubiss, P.Van Duppen, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, M.Huyse, N.Imai, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Shape coexistence in 187Au studied by laser spectroscopy

NUCLEAR MOMENTS 187,187mAu; measured hyperfine-structure (hfs) spectrum, time-of-flight of the 9/2- isomer of 187Au using ISOLTRAP's multireflection time-of-flight mass separator (MR-ToF-MS) and resonance-ionization laser spectroscopy technique at CERN-ISOLDE. 187mAu; deduced hfs parameters, isotope shift, mean-square charge radius, magnetic moment, shape coexistence, Nilsson configuration. 187,187mAu produced in U(p, F), E=1.4 GeV reaction, and separated in mass-to-charge ratio using the General Purpose Separator (GPS) of ISOLDE. Systematics of changes in mean-square charge radii for A=183-199 Au isotopes. Systematics of magnetic moments of the 9/2-, πh9/2 states in Bi, Th, Au and Fr isotopes.

doi: 10.1103/PhysRevC.101.064321
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2020CU02      Phys.Rev. C 101, 014314 (2020)

J.G.Cubiss, R.D.Harding, A.N.Andreyev, N.Althubiti, B.Andel, S.Antalic, A.E.Barzakh, T.E.Cocolios, T.Day Goodacre, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, L.P.Gaffney, L.Ghys, M.Huyse, K.M.Lynch, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, R.E.Rossel, S.Rothe, M.D.Seliverstov, S.Sels, P.Spagnoletti, C.Van Beveren, P.Van Duppen, M.Veinhard, E.Verstraelen, A.Zadvornaya

α-decay branching ratio of 180Pt

RADIOACTIVITY 180Pt(α)[from 180Hg to 180Au to 180Pt EC decay chain, 180Hg from Pb(p, X), E=1.4 GeV at ISOLDE-CERN, followed by a three-step, resonance laser ionization]; measured Eα, Iα; deduced α branching ratio, reduced α width for g.s. to g.s. transition. Comparison with earlier experimental results. 180Hg, 180Au, 176Pt, 172Os(α); measured Eα in the decay chains starting from 180Hg. Systematics of reduced α-decay widths for g.s. to g.s. α transitions in N(even)=88-112 Pt, N(even)=90-108 Hg and N(even)=96-112 Pb isotopes.

doi: 10.1103/PhysRevC.101.014314
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2020CU04      Phys.Rev. C 102, 044332 (2020)

J.G.Cubiss, A.N.Andreyev, A.E.Barzakh, V.Manea, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, R.D.Harding, F.Herfurth, M.Huyse, N.Imai, D.T.Joss, S.Kreim, D.Lunney, K.M.Lynch, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, G.G.O'Neill, R.D.Page, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, A.Stott, C.Van Beveren, P.Van Duppen, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Laser-assisted decay spectroscopy and mass spectrometry of 178Au

NUCLEAR MOMENTS 178,178mAu; measured hyperfine structure spectrum using multireflection time-of-flight mass spectrometer (MR-ToF MS) at CERN-ISOLDE; deduced spins based on hyperfine structure intensity patterns, magnetic dipole moments, Nilsson configurations.

ATOMIC MASSES 178,178mAu; measured cyclotron frequency using time-of-flight ion-cyclotron (TOF-ICR) technique using Penning-trap system of ISOLTRAP at CERN-ISOLDE; deduced mass excesses, and excitation energy of the isomer in 178Au.

RADIOACTIVITY 178,178mAu(α), (EC), (β+)[from U(p, X), E=1.4 GeV, followed by laser ionization and separation by mass-to-charge ratio using the GPS, then transported to Windmill (WM) system]; 178Pt(α)[from 178Au ϵ decay]; measured Eα, Iα, Eγ, Iγ, αγ-coin, α(x rays)-coin, half-lives of decays of 178Au and 178mAu using Si detectors for α particles and LEGe detector for γ rays. 178,178mAu; deduced branching ratios for α and ϵ decay modes, reduced α-decay widths, α-hindrance factors (HF), Nilsson configurations. 174,174mIr; deduced levels, J, total conversion coefficient for 56.8-keV transition in 174Ir, multipolarities, configurations, energy of the isomer. 174Ir(α)[from 178Au α decay]; measured αγ-coin. 170Re; deduced possible isomer in 170Re.

doi: 10.1103/PhysRevC.102.044332
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2020HA24      Phys.Rev. C 102, 024312 (2020)

R.D.Harding, A.N.Andreyev, A.E.Barzakh, D.Atanasov, J.G.Cubiss, P.Van Duppen, M.Al Monthery, N.A.Althubiti, B.Andel, S.Antalic, K.Blaum, T.E.Cocolios, T.Day Goodacre, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, D.A.Fink, L.P.Gaffney, L.Ghys, D.T.Joss, F.Herfurth, M.Huyse, N.Imai, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, D.Neidherr, R.D.Page, A.Pastore, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, S.Sels, C.Van Beveren, E.Verstraelen, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Laser-assisted decay spectroscopy for the ground states of 180, 182Au

NUCLEAR MOMENTS 180,182Au; measured hyperfine structure spectra, magnetic moments of the ground states using the ISOLTRAP Multi-Reflection Time-of-Flight Mass Spectrometer and laser spectroscopy at ISOLDE, CERN; deduced J, π, Nilsson configurations of ground states. Comparison with theoretical magnetic moments, and with previous experimental results. Laser-ionized and mass-separated 180,182Au isotopes formed in 238U(p, X), E=1.4 GeV spallation reaction.

RADIOACTIVITY 180Au(α), (β+)[from 238U(p, X), E=1.4 GeV, followed by separation using RILIS, General purpose separator (GPS) at ISOLDE-CERN]; measured Eα, Iα, Eγ, Iγ, I(x rays), αγ- and γγ-coin, half-life of 180Au decay. 176Ir; deduced levels, J, π, α-branching ratio, total conversion coefficients, multipolarities, α-hindrance factors.

doi: 10.1103/PhysRevC.102.024312
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2019BA22      Phys.Rev. C 99, 054317 (2019)

A.E.Barzakh, J.G.Cubiss, A.N.Andreyev, M.D.Seliverstov, B.Andel, S.Antalic, P.Ascher, D.Atanasov, D.Beck, J.Bieron, K.Blaum, Ch.Borgmann, M.Breitenfeldt, L.Capponi, T.E.Cocolios, T.Day Goodacre, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Fritzsche, L.P.Gaffney, S.George, L.Ghys, F.P.Hessberger, M.Huyse, N.Imai, Z.Kalaninova, D.Kisler, U.Koster, M.Kowalska, S.Kreim, J.F.W.Lane, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, S.Mitsuoka, P.L.Molkanov, Y.Nagame, D.Neidherr, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, J.P.Revill, M.Rosenbusch, R.E.Rossel, S.Rothe, K.Sandhu, L.Schweikhard, S.Sels, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, P.Van Duppen, Y.Wakabayashi, K.D.A.Wendt, F.Wienholtz, B.W.Whitmore, G.L.Wilson, R.N.Wolf, K.Zuber

Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217, 218, 219At revealed by in-source laser spectroscopy

NUCLEAR MOMENTS 217,218,219At; measured hyperfine structure spectra, isotopic shifts, and hyperfine splitting constants using in-source resonance-ionization technique at CERN-ISOLDE; deduced magnetic dipole and electric quadrupole moments, changes in nuclear mean-square charge radii, octupole collectivity. 217,218,219At isotopes produced in U(p, X), E=1.4 GeV reaction. Systematics of g factors in 209,211,213Bi, 211,217,219At, 213,219,221,223,225Fr, 215,217,227Ac, changes in rms charge radii for 207,208,209,210,211,217,218,219At, shell-effect parameters in Pb, Bi, Po, At, Rn, Fr, Ra, Ac isotopes, and odd-even staggering in 205,207,209,211Pb, 207,209,217Po, 208,210,218At, 210,212,220,222,224,226Fr, 219,221Rn, 221,223,225,227Ra.

doi: 10.1103/PhysRevC.99.054317
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2019CU02      Phys.Rev. C 99, 064317 (2019)

J.G.Cubiss, A.N.Andreyev, A.E.Barzakh, B.Andel, S.Antalic, T.E.Cocolios, T.Day Goodacre, D.V.Fedorov, V.N.Fedosseev, R.Ferrer, D.A.Fink, L.P.Gaffney, L.Ghys, M.Huyse, Z.Kalaninova, U.Koster, B.A.Marsh, P.L.Molkanov, R.E.Rossel, S.Rothe, M.D.Seliverstov, S.Sels, A.M.Sjodin, M.Stryjczyk, V.L.Truesdale, C.Van Beveren, P.Van Duppen, G.L.Wilson

Fine structure in the α decay of 218At

RADIOACTIVITY 218At(α)[from U(p, F), E=1.4 GeV, followed by selective ionization of 218At using RILIS at CERN-ISOLDE facility]; measured Eα, Iα, Eγ, Iγ, αγ-coin, half-life of 218At decay using silicon detectors for α detection and low-energy Ge detector for γ detection. 214Bi; deduced levels, J, π, α feedings, α hindrance factors. 218At; deduced J, π. Systematics of low-lying level energies in 210,212,214Bi, 212,214,216At, and α hindrance factors in the decays of 214,216,218At, 216Fr. Comparison with theoretical predictions, and with previous experimental results.

doi: 10.1103/PhysRevC.99.064317
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2019GH11      Phys.Rev. C 100, 054310 (2019)

L.Ghys, A.N.Andreyev, M.Huyse, P.Van Duppen, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, J.Cubiss, X.Derkx, H.De Witte, J.Elseviers, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, S.Mitsuoka, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, R.D.Page, L.Popescu, D.Radulov, M.M.Rajabali, E.Rapisarda, K.Sandhu, V.L.Truesdale, P.Van den Bergh, Y.Wakabayashi

α-decay properties of 200, 202Fr

RADIOACTIVITY 200,202,202mFr, 196,198,198mAt, 194,192Bi(α)[from 238U(p, F), E=1.4 GeV]; measured Eα, Iα, Eγ, Iγ, αγ- and αγγ-coin, half-lives of 200Fr g.s., 198At g.s. and 198At isomer using the windmill detection setup at ISOLDE-CERN; 196,198At, 192,194Bi; deduced levels, J, π, total conversion coefficients, multipolarities, α-reduced widths. 190Tl, 194Bi, 198At, 202Fr, 206Ac; deduced energies of the isomeric states and compared to previous experimental values. 198,202Po, 200,202At, 202Rn(α); measured Eα. Systematics of 206Ac to 190Tl and 200Fr to 188Tl decay chains. Systematics of α-reduced widths for odd-odd A=184-201 Fr, At and Bi α-emitters.

doi: 10.1103/PhysRevC.100.054310
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2019SE04      Phys.Rev. C 99, 044306 (2019)

S.Sels, T.Day Goodacre, B.A.Marsh, A.Pastore, W.Ryssens, Y.Tsunoda, N.Althubiti, B.Andel, A.N.Andreyev, D.Atanasov, A.E.Barzakh, M.Bender, J.Billowes, K.Blaum, T.E.Cocolios, J.G.Cubiss, J.Dobaczewski, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.P.Gaffney, L.Ghys, P.-H.Heenen, M.Huyse, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, Y.Martinez Palenzuela, T.M.Medonca, P.L.Molkanov, T.Otsuka, J.P.Ramos, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, P.Spagnoletti, C.Van Beveren, P.Van Duppen, M.Veinhard, E.Verstraelen, A.Welker, K.Wendt, F.Wienholtz, R.N.Wolf, A.Zadvornaya

Shape staggering of midshell mercury isotopes from in-source laser spectroscopy compared with density-functional-theory and Monte Carlo shell-model calculations

NUCLEAR MOMENTS 177,178,179,180,181,182,183,184,185,185mHg; measured hyperfine structure (hfs) spectra, hyperfine coupling constants, isotope shifts, and rms charge radii using the in-source resonance-ionization spectroscopy method combined with decay spectroscopy, and Multi-Reflection Time-of-Flight Mass Spectrometer (MR-TOF MS) at CERN-ISOLDE facility; deduced magnetic dipole moments, and spectroscopic quadrupole moments, configurations. Comparison with theoretical calculations using density functional theory (DFT) with Skyrme parametrizations, and Monte Carlo shell model (MCSM). Ions of Hg activities produced in Pb(p, X), E=1.4 GeV, using molten lead target.

NUCLEAR REACTIONS Pb, U(p, X)177Hg/178Hg/179Hg/180Hg/181Hg/182Hg/183Hg/184Hg/185Hg/185mHg, E=1.4 GeV from PS-Booster synchrotron; measured production yields for different target-ion source configurations: VADLIS or RILIS at CERN-ISOLDE facility.

doi: 10.1103/PhysRevC.99.044306
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2019VE07      Phys.Rev. C 100, 044321 (2019)

E.Verstraelen, A.Teigelhofer, W.Ryssens, F.Ames, A.Barzakh, M.Bender, R.Ferrer, S.Goriely, P.-H.Heenen, M.Huyse, P.Kunz, J.Lassen, V.Manea, S.Raeder, P.Van Duppen

Search for octupole-deformed actinium isotopes using resonance ionization spectroscopy

NUCLEAR MOMENTS 225,226,227,228,229Ac; measured hyperfine spectra, and isotope shifts by probing a 2D3/2 to 4P5/2 atomic transition using in-source resonance ionization spectroscopy at the ISAC facility in TRIUMF, where the actinium isotopes were produced in irradiating UCx with 480-MeV proton beam, and ionized by TRIUMF Resonant Ionization Laser Ion Source (TRILIS); deduced mean-square charge radii, hyperfine parameters, magnetic dipole moments, configurations; calculated β20 and β30 deformation parameters using SLy5s1, BSk31, and DD-MEB2 interactions. Comparison with previous experimental measurements, and with self-consistent calculations using energy density functionals SLy5s1, BSk31, and DD-MEB1. Z=82-89, N=120-150; systematics of experimental mean-square charge radii, and odd-even staggering parameter, and compared with theoretical calculations.

doi: 10.1103/PhysRevC.100.044321
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2018BA03      Phys.Rev. C 97, 014322 (2018)

A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, M.D.Seliverstov, Yu.M.Volkov

Shell effect in the mean square charge radii and magnetic moments of bismuth isotopes near N=126

NUCLEAR MOMENTS 211,213Bi; measured hyperfine splittings, isotope shifts, using in-source resonance ionization spectroscopy at the laser-nuclear complex of the Investigation of Radioactive Isotopes on Synchrocyclotron (IRIS) facility at Petersburg Nuclear Physics Institute (PNPI) synchrocyclotron; deduced hfs constants, changes in rms radii, magnetic dipole and electric quadrupole moments. Systematics of magnetic dipole moments and changes in charge radii for nuclei near N=126.

doi: 10.1103/PhysRevC.97.014322
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2018CU02      Phys.Rev. C 97, 054327 (2018)

J.G.Cubiss, A.E.Barzakh, M.D.Seliverstov, A.N.Andreyev, B.Andel, S.Antalic, P.Ascher, D.Atanasov, D.Beck, J.Bieron, K.Blaum, Ch.Borgmann, M.Breitenfeldt, L.Capponi, T.E.Cocolios, T.Day Goodacre, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Fritzsche, L.P.Gaffney, S.George, L.Ghys, F.P.Hessberger, M.Huyse, N.Imai, Z.Kalaninova, D.Kisler, U.Koster, M.Kowalska, S.Kreim, J.F.W.Lane, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, S.Mitsuoka, P.L.Molkanov, Y.Nagame, D.Neidherr, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, J.P.Revill, M.Rosenbusch, R.E.Rossel, S.Rothe, K.Sandhu, L.Schweikhard, S.Sels, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi, P.Van Duppen, K.D.A.Wendt, F.Wienholtz, B.W.Whitmore, G.L.Wilson, R.N.Wolf, K.Zuber

Charge radii and electromagnetic moments of 195-211At

NUCLEAR MOMENTS 195,195m,196,197,197m,198,198m,199,199m,200,200m,201,202,202m,203,204,205,206,207,208,209,210,211At; measured hfs spectra, hyperfine coupling constants, isotope shifts, and rms charge radii using the in-source resonance-ionization spectroscopy method, and Multi-Reflection Time-of-Flight Mass Spectrometer (MR-TOF MS) at CERN-ISOLDE; deduced magnetic dipole moments and spectroscopic quadrupole moments, configurations, and quadrupole deformation parameters. 206At; deduced J. Detailed systematics of magnetic dipole moments, spectroscopic quadrupole moments, deformations, and rms charge radii in Hg, Tl, Pb, Bi, Po, At, Fr, Ra and Ac nuclei. Comparison with theoretical calculations using multiconfiguration Dirac-Hartree-Fock (MCDHF) method.

NUCLEAR REACTIONS U(p, X)195At/195mAt/196At/197At/197mAt/198At/198mAt/199At/199mAt/200At/200m1At/200m2At/201At/202At/202mAt/203At/204At/205At/206At/207At/208At/209At/210At/211At, E=1.4 GeV; produced radioactive astatine isotopes by spallation reaction with beam from CERN PS Booster impinging on a thick UCx target, followed by injection into a hot cavity of the Resonance Ionization Laser Ion Source (RILIS), and ionization by a three-step photoionization scheme.

doi: 10.1103/PhysRevC.97.054327
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2018CU04      Phys.Lett. B 786, 355 (2018)

J.G.Cubiss, A.E.Barzakh, A.N.Andreyev, M.Al Monthery, N.Althubiti, B.Andel, S.Antalic, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, R.P.de Groote, A.de Roubin, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, R.Ferrer, D.A.Fink, L.P.Gaffney, L.Ghys, A.Gredley, R.D.Harding, F.Herfurth, M.Huyse, N.Imai, D.T.Joss, U.Koster, S.Kreim, V.Liberati, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, Y.Martinez Palenzuela, P.L.Molkanov, P.Mosat, D.Neidherr, G.G.O'Neill, R.D.Page, T.J.Procter, E.Rapisarda, M.Rosenbusch, S.Rothe, K.Sandhu, L.Schweikhard, M.D.Seliverstov, S.Sels, P.Spagnoletti, V.L.Truesdale, C.Van Beveren, P.Van Duppen, M.Veinhard, M.Venhart, M.Veselsky, F.Wearing, A.Welker, F.Wienholtz, R.N.Wolf, S.G.Zemlyanoy, K.Zuber

Change in structure between the I=1/2 states in 181Tl and 177, 179Au

RADIOACTIVITY 181Tl(α) [from U(p, X), E=1.4 GeV]; measured decay products, Eα, Iα; deduced α-decay branching ratio and T1/2. Comparison with available data.

NUCLEAR MOMENTS 177,179Au; measured frequencies; deduced hyperfine spectra, magnetic dipole moments, J assignments of the ground states.

doi: 10.1016/j.physletb.2018.10.005
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2018PA10      Physics of Part.and Nuclei 49, 75 (2018)

V.N.Panteleev, A.E.Barzakh, L.Kh.Batist, D.V.Fedorov, V.S.Ivanov, S.A.Krotov, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, Yu.M.Volkov

Target development for 67Cu, 82Sr radionuclide production at the RIC-80 facility

doi: 10.1134/S1063779618010318
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2018PI07      Acta Phys.Pol. B49, 523 (2018)

M.Piersa, A.Korgul, L.M.Fraile, J.Benito, E.Adamska, R.Alvarez, A.E.Barzakh, G.Benzoni, T.Berry, M.J.G.Borge, M.Carmona, K.Chrysalidis, G.Correia, C.Costache, T.Day Goodacre, D.V.Fedorov, V.N.Fedosseev, G.Fernandez-Martinez, M.Fila, D.Galaviz, R.Grzywacz, C.Henrich, A.Illana, Z.Janas, K.Johnston, V.Karanyonchev, M.Kicinska-Habior, R.Lica, M.Madurga, I.Marroquin, B.Marsh, C.Martinez, C.Mazzocchi, K.Miernik, R.Mihai, B.Olaizola, S.Paulaskalas, J.-M.Regis, S.Rothe, V.Sanchez-Tembleque, G.Simpson, Ch.Sotty, L.Stan, M.Stanoiu, M.Stryjczyk, A.Turturica, J.M.Udias, V.Vedia, A.Villa, W.B.Walters

Investigation of Low-lying States in 133Sn Populated in the β Decay of 133In Using Isomer-selective Laser Ionization

RADIOACTIVITY 133In(β-)[from ISOLDE facility, where 1.4 GeV protons are directed on uranium carbide target]; measured Eβ, Iβ, β-gated γ-ray spectra using isomer selective ionization of ISOLDE facility LDE RILIS with clear distinction between decaying gs (9/2+) and isomer (1/2-); deduced, identified γ-rays following 133In to 133Sn as βγγ coin with 513 keV transition; deduced levels, J, π participating in 133In β-decay; deduced consistency with previous results on low-lying structure in 133Sn.

doi: 10.5506/aphyspolb.49.523
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2017AN16      Phys.Rev. C 96, 054327 (2017)

B.Andel, A.N.Andreyev, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, S.Franchoo, L.Ghys, J.A.Heredia, M.Huyse, O.Ivanov, U.Koster, V.Liberati, B.A.Marsh, K.Nishio, R.D.Page, N.Patronis, M.D.Seliverstov, I.Tsekhanovich, P.Van den Bergh, J.Van De Walle, P.Van Duppen, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans

Detailed α-decay study of 180Tl

RADIOACTIVITY 180Tl(α)[from U(p, X), E=1.4 GeV using Resonance Ionization Laser Ion Source (RILIS) and HRS separator at ISOLDE-CERN facility]; measured Eα, Iα, Eγ, Iγ, E(x ray), I(x ray), αγ- and αγγ-coin. 176Au; deduced levels, α-decay branching ratios, reduced α-widths, total and K-conversion coefficients, multipolarities, configurations, population of only the low-spin activity in 176Au from 180Tl α decay. Comparison with previous experimental data. Systematics of α-reduced widths in α-decays of 178,180,182,184Tl. 180Hg(α)[from 180Tl ϵ decay]; 176Au(α)[from 180Tl α decay]; 176Pt(α)[from 180Hg α decay]; measured Eα, Eγ, αγ-coin. 172Ir; deduced level, low-spin activity in 172Ir populated by 176Au α decay.

doi: 10.1103/PhysRevC.96.054327
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2017BA04      Phys.Rev. C 95, 014324 (2017)

A.E.Barzakh, A.N.Andreyev, T.E.Cocolios, R.P.de Groote, D.V.Fedorov, V.N.Fedosseev, R.Ferrer, D.A.Fink, L.Ghys, M.Huyse, U.Koster, J.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, P.L.Molkanov, T.J.Procter, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, C.Van Beveren, P.Van Duppen, M.Venhart, M.Veselsky

Changes in mean-squared charge radii and magnetic moments of 179-184Tl measured by in-source laser spectroscopy

NUCLEAR MOMENTS 179,180,181,182m,183,183m,184mTl; measured hyperfine splittings, spins for 179,181,183Tl, magnetic moments, isotope shifts, and changes in mean square charge radii. 182mTl and 184mTl include two, and three isomers, respectively. In-source resonance ionization laser spectroscopy at CERN-ISOLDE facility; discussed configurations. Radioactive Tl isotopes from U(p, X), E=1.4 GeV reaction using UCx target, and General Purpose Separator of ISOLDE.

doi: 10.1103/PhysRevC.95.014324
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2017BA12      Phys.Rev. C 95, 044324 (2017)

A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, M.D.Seliverstov, Yu.M.Volkov

Onset of deformation in neutron-deficient Bi isotopes studied by laser spectroscopy

NUCLEAR MOMENTS 189,190,190m,191,192,192m,194,194m,198mBi; measured hyperfine splitting, isotope shifts at Radioactive Isotopes on Synchrocyclotron facility of PNPI; deduced changes in mean-square charge radii, magnetic dipole moments, configurations, deformation parameters. Systematics of <r2> values in Pb, Bi and Po isotopes, In-source resonance ionization spectroscopy.

doi: 10.1103/PhysRevC.95.044324
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2017FE10      Nat. Commun. 8, 14520 (2017)

R.Ferrer, A.Barzakh, B.Bastin, R.Beerwerth, M.Block, P.Creemers, H.Grawe, R.de Groote, P.Delahaye, X.Flechard, S.Franchoo, S.Fritzsche, L.P.Gaffney, L.Ghys, W.Gins, C.Granados, R.Heinke, L.Hijazi, M.Huyse, T.Kron, Yu.Kudryavtsev, M.Laatiaoui, N.Lecesne, M.Loiselet, F.Lutton, I.D.Moore, Y.Martínez, E.Mogilevskiy, P.Naubereit, J.Piot, S.Raeder, S.Rothe, H.Savajols, S.Sels, V.Sonnenschein, J-C.Thomas, E.Traykov, C.Van Beveren, P.Van den Bergh, P.Van Duppen, K.Wendt, A.Zadvornaya

Towards high-resolution laser ionization spectroscopy of the heaviest elements in supersonic gas jet expansion

NUCLEAR MOMENTS 212,213,214,215,227Ac; measured frequencies; deduced hfs spectra, magnetic dipole and electric quadrupole moments. In-gas laser ionization and spectroscopy (IGLIS) technique.

doi: 10.1038/ncomms14520
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2017GR18      Phys.Rev. C 96, 054331 (2017)

C.Granados, P.Creemers, R.Ferrer, L.P.Gaffney, W.Gins, R.de Groote, M.Huyse, Yu.Kudryavtsev, Y.Martinez, S.Raeder, S.Sels, C.Van Beveren, P.Van den Bergh, P.Van Duppen, K.Wrzosek-Lipska, A.Zadvornaya, A.E.Barzakh, B.Bastin, P.Delahaye, L.Hijazi, N.Lecesne, F.Luton, J.Piot, H.Savajols, J.-C.Thomas, E.Traykov, R.Beerwerth, S.Fritzsche, M.Block, X.Flechard, S.Franchoo, L.Ghys, H.Grawe, R.Heinke, T.Kron, P.Naubereit, K.Wendt, M.Laatiaoui, I.Moore, V.Sonnenschein, M.Loiselet, E.Mogilevskiy, S.Rothe

In-gas laser ionization and spectroscopy of actinium isotopes near the N=126 closed shell

NUCLEAR MOMENTS 212,213,214,215,227Ac; measured optical hyperfine spectra by the in-gas laser ionization and spectroscopy (IGLIS) technique at the LISOL facility of Cyclotron Research Centre, Louvain-la-Neuve; deduced g factors, quadrupole moments and spins of the ground states, configurations. Comparison with large-scale nuclear-shell-model calculations. 212,213Ac produced in 197Au(20Ne, 5n), (20Ne, 4n), E=145 MeV. 214,215Ac produced in 197Au(22Ne, 5n), (22Ne, 4n), E=143 MeV.

RADIOACTIVITY 215Ac(α)[from 197Au(22Ne, 4n), E=143 MeV; measured Eα.

doi: 10.1103/PhysRevC.96.054331
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2017MA29      Phys.Rev. C 95, 054322 (2017)

V.Manea, P.Ascher, D.Atanasov, A.E.Barzakh, D.Beck, K.Blaum, Ch.Borgmann, M.Breitenfeldt, R.B.Cakirli, T.E.Cocolios, T.Day Goodacre, D.V.Fedorov, V.N.Fedosseev, S.George, F.Herfurth, M.Kowalska, S.Kreim, Yu.A.Litvinov, D.Lunney, B.Marsh, D.Neidherr, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, F.Wienholtz, R.N.Wolf, K.Zuber

Penning-trap mass spectrometry and mean-field study of nuclear shape coexistence in the neutron-deficient lead region

ATOMIC MASSES 180,185,188,190Au, 197,197m,219At; measured cyclotron frequency ratios with respect to 133Cs+ by the time-of-flight ion-cyclotron-resonance (ToF-ICR) technique using ISOLTRAP at ISOLDE-CERN; deduced mass excesses, and compared to values from AME-2012. Isotopes prepared by 1.4-GeV protons incident on UCx target at CERN's proton synchrotron booster (PSB), followed by selective ionization by resonance-ionization laser ion source (RILIS), and mass separation using magnetic separators at ISOLDE. 197At; deduced ground state and the energy of the isomer. Systematics of S(2n) and rms charge radii for N=100-114, Au and Hg isotopes.

doi: 10.1103/PhysRevC.95.054322
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2017MO44      Physics of Part.and Nuclei 48, 914 (2017)

P.L.Molkanov, A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, M.D.Seliverstov, Yu.M.Volkov

Shape evolution for neutron-deficient bismuth isotopes studied by resonance laser ionization spectroscopy

ATOMIC PHYSICS 189,190,191,192,193,194,195,196,197,198,211Bi; measured 306.77 nm atomic transition using in-source laser spectroscopy at IRIS facility of Petersburg Nuclear Physics Institute; deduced isotope shifts, isomers, mean-square charge radii, large isomer shift for the intruder isomer states with spin I=1/2 (A=193, 195, 197), shape coexistence in these nuclei with intruder isomer states more deformed than the gs, nearly spherical behavior for gs of even-neutron Bi isotopes at N less than 109 (in contrast to Pb and Tl isotopic chains).

doi: 10.1134/S1063779617060417
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2017RA11      J.Phys.(London) G44, 074001 (2017)

E.Rapisarda, A.N.Andreyev, S.Antalic, A.Barzakh, T.E.Cocolios, I.G.Darby, R.De Groote, H.De Witte, J.Diriken, J.Elseviers, D.Fedorov, V.N.Fedosseev, R.Ferrer, M.Huyse, Z.Kalaninova, U.Koster, J.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, P.L.Molkanov, D.Pauwels, T.J.Procter, D.Radulov, K.Sandhu, M.D.Seliverstov, C.Van Beveren, P.Van den Bergh, P.Van Duppen, M.Venhart, M.Veselsky, K.Wrzosek-Lipska

Shape coexistence studied in 182, 184Hg via the β decay of 182, 184Tl

RADIOACTIVITY 182,184Tl(β+), (EC) [from U(p, X), E=1.4 GeV]; measured decay products, Eγ, Iγ, γ-γ-coin.; deduced γ-ray energies, intensities, J, π, conversion coefficients. Comparison with systematics.

doi: 10.1088/1361-6471/aa6bb6
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2016BA42      Phys.Rev. C 94, 024334 (2016)

A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, M.D.Seliverstov, Yu.M.Volkov

Laser spectroscopy studies of intruder states in 193, 195, 197Bi

ATOMIC PHYSICS 193,193m,195,195m,197,197mBi; measured hyperfine spectra of ground states and isomers using method of resonance laser photoionization in the laser ion source at the IRIS synchrocyclotron facility of PNPI, Gatchina; deduced isotope and isomer shifts, and hfs-constants.

NUCLEAR MOMENTS 193,193m,195,195m,197,197mBi; measured hyperfine spectra of ground states and isomers using method of resonance laser photoionization in the laser ion source; deduced magnetic-dipole and electric quadrupole moments, deformation parameters, changes in mean square charge radii, Z-dependence of mean square charge radii. Systematics of magnetic-dipole moments and isomer shifts for 9/2- and 1/2+ states in odd-A Bi and Tl nuclei of even N=104-130. Systematics of changes in mean-square charge radii even-A Pb isotopes, and for 9/2+ and 1/2- states in odd-A Bi isotopes.

doi: 10.1103/PhysRevC.94.024334
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2016FE11      Nat. Commun. 8, 14520 (2016), See 2017FE10

R.Ferrer, A.Barzakh, B.Bastin, R.Beerwerth, M.Block, P.Creemers, H.Grawe, R.de Groote, P.Delahaye, X.Flechard, S.Franchoo, S.Fritzsche, L.P.Gaffney, L.Ghys, W.Gins, C.Granados, R.Heinke, L.Hijazi, M.Huyse, T.Kron, Yu.Kudryavtsev, M.Laatiaoui, N.Lecesne, M.Loiselet, F.Lutton, I.D.Moore, Y.Martinez, E.Mogilevskiy, P.Naubereit, J.Piot, S.Raeder, S.Rothe, H.Savajols, S.Sels, V.Sonnenschein, J-C.Thomas, E.Traykov, C.Van Beveren, P.Van den Bergh, P.Van Duppen, K.Wendt, A.Zadvornaya

Towards high-resolution laser ionization spectroscopy of the heaviest elements in supersonic gas jet expansion

NUCLEAR MOMENTS 212,213,214,215,227Ac; measured frequencies; deduced nuclear magnetic moments, electric quadrupole moments, radii. Comparison with theoretical calculations, experimental data.

doi: 10.1038/ncomms14520
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2016TR07      Phys.Rev. C 94, 034308 (2016)

V.L.Truesdale, A.N.Andreyev, L.Ghys, M.Huyse, P.Van Duppen, S.Sels, B.Andel, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, S.Mitsuoka, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, L.Popescu, D.Radulov, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi

β-delayed fission and α decay of 196At

RADIOACTIVITY 196At, 196Po(α); 196At(EC), (β+), (β+F), [high purity 196At beam from U(p, X), E=1.4 GeV using HRS and GPS separators with RILIS at ISOLDE-CERN facility]; measured Eα, Iα, Eγ, Iγ, αγ-coin, fission-fragment energies, (fission fragment)(fission fragment)-coin, half-lives of decays of 196At and 196Po; deduced α- and β-decay and β-delayed fission branching ratios of 196At, reduced α-decay widths, symmetric and asymmetric fission-fragment mass distributions of the daughter isotope 196Po. 192Bi; deduced levels, J, π, conversion coefficients, multipolarities, mixing ratio, configurations. Comparison with previous experimental values. 192Bi, 199,200,201At, 202Rn; observed α from daughter activity 192Bi and other contaminants.

doi: 10.1103/PhysRevC.94.034308
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2016VA01      J.Phys.(London) G43, 025102 (2016)

C.Van Beveren, A.N.Andreyev, A.E.Barzakh, T.E.Cocolios, R.P.de Groote, D.Fedorov, V.N.Fedosseev, R.Ferrer, L.Ghys, M.Huyse, U.Koster, J.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, P.L.Molkanov, T.J.Procter, E.Rapisarda, K.Sandhu, M.D.Seliverstov, P.Van Duppen, M.Venhart, M.Veselsky

α-decay study of 182, 184Tl

RADIOACTIVITY 182,184Tl(α); measured decay products, Eγ, Iγ, Eα, Iα, α-γ-coin.; deduced energy levels, J, π, branching ratios, isomeric state T1/2, α-decay scheme. Comparison with available data.

doi: 10.1088/0954-3899/43/2/025102
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2015FI07      Phys.Rev.X 5, 011018 (2015)

D.A.Fink, T.E.Cocolios, A.N.Andreyev, S.Antalic, A.E.Barzakh, B.Bastin, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, L.Ghys, A.Gottberg, M.Huyse, N.Imai, T.Kron, N.Lecesne, K.M.Lynch, B.A.Marsh, D.Pauwels, E.Rapisarda, S.D.Richter, R.E.Rossel, S.Rothe, M.D.Seliverstov, A.M.Sjodin, C.Van Beveren, P.Van Duppen, K.D.A.Wendt

In-Source Laser Spectroscopy with the Laser Ion Source and Trap: First Direct Study of the Ground-State Properties of 217, 219Po

NUCLEAR MOMENTS 216,217,218Po [from 238U(p, X), E=1.4 GeV]; measured resonance spectra, Eα, Iα; deduced g-factors, mean-square charge radii, electromagnetic nuclear moments. In-source laser spectroscopy.

RADIOACTIVITY 219Po(α) [from 238U(p, X), E=1.4 GeV]; measured decay spectra, Eα, Iα; deduced α-decay spectra, branching ratios, T1/2, hindrance factors. Comparison with available data.

doi: 10.1103/PhysRevX.5.011018
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2015VA10      Phys.Rev. C 92, 014325 (2015)

C.Van Beveren, A.N.Andreyev, A.E.Barzakh, T.E.Cocolios, D.Fedorov, V.N.Fedosseev, R.Ferrer, M.Huyse, U.Koster, J.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, T.J.Procter, D.Radulov, E.Rapisarda, K.Sandhu, M.D.Seliverstov, P.Van Duppen, M.Venhart, M.Veselsky

Internal decay of the (10-) intruder state in 184Tl

RADIOACTIVITY 184mTl(IT), (α)[from U(p, X), E=1.4 GeV at ISOLDE-CERN facility and using RILIS]; measured Eγ, Iγ, I(x rays), γ(t), ce, half-life of (10-) isomer, 184Tl; deduced levels, J, π, isomer, internal-conversion coefficients, multipolarity, B(M2), B(E3), retardation factors for M2 and E3 transitions, configuration, intruder character of the (10-) isomer. 187m,188m,189m,190m,191m,192mBi(α); discussed systematics of α-decay parameters to daughter Tl states involving 1h9/2 and 2d3/2 proton configurations.

doi: 10.1103/PhysRevC.92.014325
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2014GH09      Phys.Rev. C 90, 041301 (2014)

L.Ghys, A.N.Andreyev, M.Huyse, P.Van Duppen, S.Sels, B.Andel, S.Antalic, A.Barzakh, L.Capponi, T.E.Cocolios, X.Derkx, H.De Witte, J.Elseviers, D.V.Fedorov, V.N.Fedosseev, F.P.Hessberger, Z.Kalaninova, U.Koster, J.F.W.Lane, V.Liberati, K.M.Lynch, B.A.Marsh, S.Mitsuoka, P.Moller, Y.Nagame, K.Nishio, S.Ota, D.Pauwels, R.D.Page, L.Popescu, D.Radulov, M.M.Rajabali, J.Randrup, E.Rapisarda, S.Rothe, K.Sandhu, M.D.Seliverstov, A.M.Sjodin, V.L.Truesdale, C.Van Beveren, P.Van den Bergh, Y.Wakabayashi, M.Warda

Evolution of fission-fragment mass distributions in the neutron-deficient lead region

RADIOACTIVITY 194,196At, 200,202Fr(β+F)[from U(p, X), E=1.4 GeV at CERN-ISOLDE using HRS and GPS separators]; measured mass and energy distributions of coincident fission fragments after β-delayed fission, ratio of α to β-delayed-fission decays, total kinetic energy. 196At, 200Fr; deduced β-delayed fission decay probabilities, new region of multimodal fission in the neutron-deficient lead region. 196Po; Calculated potential energy surface contour. Comparison with Finite-range liquid-drop (FRLDM) and Hartree-Fock-Bogoliubov (HFB) model calculations. Comparison with experimental results for β-delayed fission of 180Tl.

doi: 10.1103/PhysRevC.90.041301
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2014SE07      Phys.Rev. C 89, 034323 (2014)

M.D.Seliverstov, T.E.Cocolios, W.Dexters, A.N.Andreyev, S.Antalic, A.E.Barzakh, B.Bastin, J.Buscher, I.G.Darby, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, S.Franchoo, G.Huber, M.Huyse, M.Keupers, U.Koster, Yu.Kudryavtsev, B.A.Marsh, P.L.Molkanov, R.D.Page, A.M.Sjodin, I.Stefan, P.Van Duppen, M.Venhart, S.G.Zemlyanoy

Electromagnetic moments of odd-A 193-203, 211Po isotopes

RADIOACTIVITY 193Po, 193mPo, 195Po, 195mPo, 197Po, 197mPo, 199Po, 199mPo, 201Po, 201mPo, 203Po, 203mPo, 209Po, 211Po(α)[from 238U(p, F), E=1.4 GeV followed by mass separation]; measured Eα, Eγ, hyperfine splitting parameters for low-spin ground state and high-spin Po activities using in-source resonance ionization spectroscopy technique, and Wildmill chamber at ISOLDE-CERN facility; deduced magnetic dipole and spectroscopic electric quadrupole moments. Comparison with particle-plus-rotor model calculations.

NUCLEAR MOMENTS 193,193m,195,195m,197,197m,199,199m,201,201m,203,203m,209,211Po; measured hyperfine splitting constants; magnetic dipole moments, and spectroscopic electric quadrupole moments, quadrupole deformation parameters using online mass separator and in-source resonance ionization spectroscopy technique at ISOLDE-CERN facility. Comparison with predictions of particle-plus-rotor model calculations, and with previous experimental results. Discussed configuration mixing. Systematics of magnetic moments for 3/2- and 13/2+ states in 187,189,191,193,195Pt, 185,187,189,191,193,195Hg, 187,189,191,193,195,197,199Pb, 193,195,197,199,201,203,205,207Po.

doi: 10.1103/PhysRevC.89.034323
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2013AN10      Phys.Rev. C 87, 054311 (2013)

A.N.Andreyev, V.Liberati, S.Antalic, D.Ackermann, A.Barzakh, N.Bree, T.E.Cocolios, J.Diriken, J.Elseviers, D.Fedorov, V.N.Fedosseev, D.Fink, S.Franchoo, S.Heinz, F.P.Hessberger, S.Hofmann, M.Huyse, O.Ivanov, J.Khuyagbaatar, B.Kindler, U.Koster, J.F.W.Lane, B.Lommel, R.Mann, B.Marsh, P.Molkanov, K.Nishio, R.D.Page, N.Patronis, D.Pauwels, D.Radulov, S.Saro, M.Seliverstov, M.Sjodin, I.Tsekhanovich, P.Van den Bergh, P.Van Duppen, M.Venhart, M.Veselsky

α-decay spectroscopy of the chain 179Tlg175Aug171Irg167Rem

RADIOACTIVITY 179Tl(α)[from U(p, F), E=1.4 GeV and 144Sm(40Ca, 4np), E=232 MeV]; 175Au, 171Ir(α)[from 179Tl(α) decay]; measured Eα, Iα, Eγ, (recoil)α-, αα-coin, T1/2, α-branching ratios, yields at ISOLDE-CERN and SHIP-GSI facilities. 179Tl, 175Au, 171Ir, 167Re; deduced levels, J, π. 172,173,175Pt, 176,177Hg, 179Au(α); measured Eα. Comparison with earlier experimental results.

doi: 10.1103/PhysRevC.87.054311
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2013BA41      Phys.Rev. C 88, 024315 (2013)

A.E.Barzakh, L.Kh.Batist, D.V.Fedorov, V.S.Ivanov, K.A.Mezilev, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, Yu.M.Volkov

Changes in the mean-square charge radii and magnetic moments of neutron-deficient Tl isotopes

NUCLEAR MOMENTS 183,184m,185,185m,186m,187m,195m,197mTl; measured hyperfine splitting, and isotope shifts relative to those of 205Tl using IRIS facility at PNPI; deduced mean-square charge radii, magnetic moments. In-source resonance ionization laser spectroscopy. 183,184m,185,185m,186m,187m,188m,189m,190,190m,191,191m,192,192m,193,193m,194,194m,195,195m,196,196m,197,197m,198,198m,199,200,201,202,203,204,205,207,208Tl; analyzed rms charge radii from previous and current experimental data. Systematics of rms charge radii for even neutron N=100-128, and odd-neutron N=101-117 nuclei. Systematics of magnetic moments for A=183-207 Tl isotopes.

NUCLEAR REACTIONS U(p, X)183Tl/184mTl/185Tl/185mTl/186mTl/187mTl/195mTl/197mTl, E=1 GeV; measured hyperfine structure; deduced charge radii, magnetic moments.

doi: 10.1103/PhysRevC.88.024315
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2013EL08      Phys.Rev. C 88, 044321 (2013); Erratum Phys.Rev. C 102, 019908 (2020)

J.Elseviers, A.N.Andreyev, M.Huyse, P.Van Duppen, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, D.Fedorov, V.N.Fedosseev, S.Franchoo, L.Ghys, J.A.Heredia, O.Ivanov, U.Koster, B.A.Marsh, K.Nishio, R.D.Page, N.Patronis, M.D.Seliverstov, I.Tsekhanovich, P.Van den Bergh, J.Van De Walle, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans

β-delayed fission of 180Tl

RADIOACTIVITY 180Tl(EC), (β+), (SF)[from U(p, X), E=1.4 GeV]; measured Eα, Eβ, Eγ, fission fragment spectra, (fission fragment)(fission fragment)-coin, (fission fragment)γ-coin, mass and energy distribution of fission fragments, total kinetic energy of fission events, β-delayed fission probability, fission yield, half-life of 180Tl using RILIS source and HRS separator at ISOLDE-CERN facility. 180Hg; deduced asymmetric fission of excited states populated in decay of 180Tl. Viola systematics of total kinetic energies vs fissility parameter for 180Hg and heavier actinides.

doi: 10.1103/PhysRevC.88.044321
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2013LI49      Phys.Rev. C 88, 044322 (2013)

V.Liberati, A.N.Andreyev, S.Antalic, A.Barzakh, T.E.Cocolios, J.Elseviers, D.Fedorov, V.N.Fedoseev, M.Huyse, D.T.Joss, Z.Kalaninova, U.Koster, J.F.W.Lane, B.Marsh, D.Mengoni, P.Molkanov, K.Nishio, R.D.Page, N.Patronis, D.Pauwels, D.Radulov, M.Seliverstov, M.Sjodin, I.Tsekhanovich, P.Van den Bergh, P.Van Duppen, M.Venhart, M.Veselsky

β-delayed fission and α decay of 178Tl

RADIOACTIVITY 178Tl(α), (EC), (β+), (SF)[from U(p, X), E=1.4 GeV]; measured Eα, Iα, Eγ, x rays, αγ-coin, αα-correlations, β-delayed fission fragment spectra, half-life of 178Tl using RILIS source, HRS and GPS separators at ISOLDE-CERN facility. 174Au; deduced levels, α reduced widths, multipolarity, conversion coefficient. 178Tl; deduced J, π and Q(α) of g.s., α-, EC+β+, β-delayed fission probability, total kinetic energy of fission events. 178Hg; deduced asymmetric fission of excited states populated in decay of 178Tl, comparison with asymmetric fission of 180Hg from 180Tl decay. Viola systematics of total kinetic energies vs fissility parameter for 178,180Hg and heavier actinides.

doi: 10.1103/PhysRevC.88.044322
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2013SE03      Phys.Lett. B 719, 362 (2013)

M.D.Seliverstov, T.E.Cocolios, W.Dexters, A.N.Andreyev, S.Antalic, A.E.Barzakh, B.Bastin, J.Buscher, I.G.Darby, D.V.Fedorov, V.N.Fedoseyev, K.T.Flanagan, S.Franchoo, S.Fritzsche, G.Huber, M.Huyse, M.Keupers, U.Koster, Yu.Kudryavtsev, B.A.Marsh, P.L.Molkanov, R.D.Page, A.M.Sjodin, I.Stefan, J.Van de Walle, P.Van Duppen, M.Venhart, S.G.Zemlyanoy

Charge radii of odd-A 191-211Po isotopes

NUCLEAR MOMENTS 191,193,195,197,199,201,203,209,211Po; measured optical spectra, isotope shifts, Eα, Iα; deduced mean square charge radii.

doi: 10.1016/j.physletb.2013.01.043
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2012BA32      Phys.Rev. C 86, 014311 (2012)

A.E.Barzakh, L.Kh.Batist, D.V.Fedorov, V.S.Ivanov, K.A.Mezilev, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, Yu.M.Volkov

Hyperfine structure anomaly and magnetic moments of neutron deficient Tl isomers with I=9/2

NUCLEAR MOMENTS 187m,189m,191m,193m,195m,197mTl; measured hyperfine splittings of 9/2 isomers relative to that for 205Tl; deduced magnetic dipole moments, differential hyperfine structure anomaly (DHFA) for Tl isomers. In-source ionization laser spectroscopy. Nuclear magnetization distribution.

doi: 10.1103/PhysRevC.86.014311
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2012CO24      J.Phys.:Conf.Ser. 381, 012072 (2012)

T.E.Cocolios, A.N.Andreyev, S.Antalic, A.E.Barzakh, B.Bastin, J.Buscher, I.G.Darby, W.Dexters, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, S.Franchoo, S.Fritzsche, G.Huber, M.Huyse, M.Keupers, U.Koster, Yu.Kudryavtsev, E.Mane, B.A.Marsh, P.L.Molkanov, R.D.Page, M.D.Seliverstov, A.M.Sjodin, I.Stefan, J.Van de Walle, P.Van Duppen, M.Venhart, S.G.Zemlyanoy

Early onset of deformation in the neutron-deficient polonium isotopes

ATOMIC PHYSICS 191,192,193,194,195,196,197,198,199,200,201,202,203,204,206,208,209,210,211,216,218Po[from high-energy proton-induced spallation of 238U]; measured Eα, Iα, Eβ, Iβ, Eγ, Ιg; deduced even-A charge radius. 199g,199mPo deduced hyperfine spectra, γ transition energy, intensity. Compared with earlier papers.

doi: 10.1088/1742-6596/381/1/012072
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2011BA19      Eur.Phys.J. A 47, 70 (2011)

A.E.Barzakh, G.Lhersonneau, L.Kh.Batist, D.V.Fedorov, V.S.Ivanov, K.A.Mezilev, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, Yu.M.Volkov, O.Alyakrinskiy, M.Barbui, L.Stroe, L.B.Tecchio

Secondary neutrons as the main source of neutron-rich fission products in the bombardment of a thick U target by 1 GeV protons

NUCLEAR REACTIONS 12C, 238U(p, X), E=1 GeV;238U(n, f), E not given; measured Eα, Iα, Eγ, Iγ; deduced yields; calculated yields; DEM (Diffusion-Effusion Model), double-diffusion model, FLUKA.

doi: 10.1140/epja/i2011-11070-y
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2011CO01      Phys.Rev.Lett. 106, 052503 (2011)

T.E.Cocolios, W.Dexters, M.D.Seliverstov, A.N.Andreyev, S.Antalic, A.E.Barzakh, B.Bastin, J.Buscher, I.G.Darby, D.V.Fedorov, V.N.Fedosseyev, K.T.Flanagan, S.Franchoo, S.Fritzsche, G.Huber, M.Huyse, M.Keupers, U.Koster, Yu.Kudryavtsev, E.Mane, B.A.Marsh, P.L.Molkanov, R.D.Page, A.M.Sjoedin, I.Stefan, J.Van de Walle, P.Van Duppen, M.Venhart, S.G.Zemlyanoy, M.Bender, P.-H.Heenen

Early Onset of Ground State Deformation in Neutron Deficient Polonium Isotopes

NUCLEAR REACTIONS U(p, X)192Po/194Po/196Po/198Po/200Po/202Po/204Po/206Po/208Po/210Po/216Po/218Po, E=1.4 GeV; measured reaction products, Ee, Ie, Eα, Iα; deduced isotope shifts, mean-square charge radii. Comparison with systematics and FRDM calculations.

doi: 10.1103/PhysRevLett.106.052503
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2011EL07      Phys.Rev. C 84, 034307 (2011)

J.Elseviers, A.N.Andreyev, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, D.Fedorov, V.N.Fedosseyev, S.Franchoo, J.A.Heredia, M.Huyse, O.Ivanov, U.Koster, B.A.Marsh, R.D.Page, N.Patronis, M.Seliverstov, I.Tsekhanovich, P.Van den Bergh, J.Van De Walle, P.Van Duppen, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans

Shape coexistence in 180Hg studied through the β decay of 180Tl

RADIOACTIVITY 180Tl(β+), (EC)[from U(p, X), E=1.4 GeV; measured electron-, positron-, α-, and fission-fragment spectra, Eγ, Iγ, γγ-, γ(ce)-coin, half-life at CERN-ISOLDE facility, resonant laser-ionization technique for source extraction. 180Tl; measured half-life of g.s.; deduced branching ratios, J, π of g.s. 180Hg; deduced levels, J, π, E0 transitions, multipolarity. Comparison with level schemes of 182,184,196Hg. Systematics of level energies of even A=174-206 Hg nuclei up to 12+.

doi: 10.1103/PhysRevC.84.034307
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2010AN13      Phys.Rev.Lett. 105, 252502 (2010)

A.N.Andreyev, J.Elseviers, M.Huyse, P.Van Duppen, S.Antalic, A.Barzakh, N.Bree, T.E.Cocolios, V.F.Comas, J.Diriken, D.Fedorov, V.Fedosseev, S.Franchoo, J.A.Heredia, O.Ivanov, U.Koster, B.A.Marsh, P.Van den Bergh, J.Van De Walle, K.Nishio, R.D.Page, N.Patronis, M.Seliverstov, I.Tsekhanovich, M.Venhart, S.Vermote, M.Veselsky, C.Wagemans, T.Ichikawa, A.Iwamoto, P.Moller, A.J.Sierk

New Type of Asymmetric Fission in Proton-Rich Nuclei

RADIOACTIVITY 180Tl(α), (β+), (EC) [from U(p, X), E=1.4 GeV]; measured fission fragments, Eα, Iα, X-rays. 180Hg; deduced asymetric fission fragment distribution, branching ratio for β-delayed fission.

doi: 10.1103/PhysRevLett.105.252502
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2010CO13      J.Phys.(London) G37, 125103 (2010)

T.E.Cocolios, A.N.Andreyev, S.Antalic, A.Barzakh, B.Bastin, J.Buscher, I.G.Darby, W.Dexters, D.V.Fedorov, V.N.Fedosseev, K.T.Flanagan, S.Franchoo, G.Huber, M.Huyse, M.Keupers, U.Koster, Yu.Kudryavtsev, E.Mane, B.A.Marsh, P.Molkanov, R.D.Page, M.D.Seliverstov, A.M.Sjoedin, I.Stefan, J.Van de Walle, P.Van Duppen, M.Venhart, S.Zemlyanoy

Structure of 191Pb from α- and β-decay spectroscopy

RADIOACTIVITY 191,193Bi(EC), 195Po(α); measured Eα, Iα, Eγ, Iγ; deduced branching ratios, α-decay fine structures, γ-ray energies and intensities, J, π, ICC.

COMPILATION 191,193,195,197,199,201,203,205,207Pb; compiled experimental nuclear structure data.

doi: 10.1088/0954-3899/37/12/125103
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2009PA49      Eur.Phys.J. A 42, 495 (2009)

V.N.Panteleev, O.Alyakrinskiy, M.Barbui, A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, G.Lhersonneau, K.A.Mezilev, P.L.Molkanov, F.V.Moroz, S.Yu.Orlov, L.Stroe, L.B.Tecchio, M.Tonezzer, Yu.M.Volkov

Production of Cs and Fr isotopes from a high-density UC targets with different grain dimensions

NUCLEAR REACTIONS 238U(p, X)122Cs/123Cs/124Cs/125Cs/126Cs/127Cs/128Cs/129Cs/130Cs/132Cs/138Cs/139Cs/140Cs/141Cs/142Cs/143Cs/144Cs/145Cs/146Cs/147Cs/148Cs/202Fr/203Fr/204Fr/205Fr/206Fr/207Fr/208Fr/209Fr/210Fr/211Fr/212Fr/213Fr/214Fr/218Fr/219Fr/220Fr/221Fr/222Fr/223Fr/224Fr/225Fr/226Fr/227Fr/228Fr, E=1 GeV; measured fission and spallation yields from different mass targets; deduced effect of target size.

doi: 10.1140/epja/i2009-10841-3
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2009SE13      Eur.Phys.J. A 41, 315 (2009)

M.D.Seliverstov, A.N.Andreyev, N.Barre, A.E.Barzakh, S.Dean, H.De Witte, D.V.Fedorov, V.N.Fedoseyev, L.M.Fraile, S.Franchoo, J.Genevey, G.Huber, M.Huyse, U.Koster, P.Kunz, S.R.Lesher, B.A.Marsh, I.Mukha, B.Roussiere, J.Sauvage, I.Stefanescu, K.Van de Vel, P.Van Duppen, Yu.M.Volkov

Charge radii and magnetic moments of odd- A 183-189Pb isotopes

NUCLEAR MOMENTS 182,183,184,185,186,187,188,189,190Pb [from 238U(p, X), E=1, 4 GeV online mass separator using the in-source resonance ionization spectroscopy technique]; measured hfs spectra; deduced μ, hyperfine coupling constants, charge radii. Comparison with other data.

doi: 10.1140/epja/i2009-10817-3
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2007RI15      Eur.Phys.J. A 32, 1 (2007)

D.Ridikas, A.Barzakh, V.Blideanu, J.C.David, D.Dore, D.Fedorov, X.Ledoux, F.Moroz, V.Panteleev, R.Plukiene, A.Plukis, A.Prevost, O.Shcherbakov, A.Vorobyev

Measurement of delayed neutron yields and time spectra from 1 GeV protons interacting with thick natPb targets

NUCLEAR REACTIONS Pb(p, X)17N/87Br/88Br, E=1 GeV; measured delayed neutron yields and precursor production cross sections.

doi: 10.1140/epja/i2007-10368-7
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2006LH01      Phys.Rev. C 74, 017308 (2006)

G.Lhersonneau, V.Rizzi, O.Alyakrinskiy, A.Lanchais, L.B.Tecchio, A.E.Barzakh, D.V.Fedorov, A.M.Ionan, V.S.Ivanov, K.A.Mezilev, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, Yu.M.Volkov, C.Lau, O.Bajeat, S.Essabaa, P.Jardin, R.Leroy, L.Stroe

Absolute branching intensities in the decay of 92Rb to 92Sr

RADIOACTIVITY 92,94Rb, 92,94Sr(β-) [from 238U(p, F)]; measured Eγ, Iγ; deduced absolute branching intensities.

doi: 10.1103/PhysRevC.74.017308
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2005AN01      Eur.Phys.J. A 23, 257 (2005)

A.Andrighetto, O.Bajeat, A.E.Barzakh, S.Essabaa, D.V.Fedorov, A.M.Ionan, V.S.Ivanov, R.Leroy, G.Lhersonneau, K.A.Mezilev, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, L.Stroe, L.B.Tecchio, A.Villari, Yu.M.Volkov, X.F.Wang

On-line production of Rb and Cs isotopes from uranium carbide targets

NUCLEAR REACTIONS 238U(p, F)89Rb/90Rb/91Rb/93Rb/94Rb/95Rb/139Cs/140Cs/141Cs/142Cs/144Cs/145Cs, E=1 GeV; measured yields.

doi: 10.1140/epja/i2004-10095-7
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2005BA64      Phys.Rev. C 72, 017301 (2005)

A.E.Barzakh, D.V.Fedorov, A.M.Ionan, V.S.Ivanov, F.V.Moroz, K.A.Mezilev, S.Yu.Orlov, V.N.Panteleev, Yu.M.Volkov

Laser spectroscopic studies of 145Gd, 145Gdm, and 143Gdm

NUCLEAR MOMENTS 143m,145,145mGd; measured isotope shifts, hfs; deduced radii, μ. Laser spectroscopy.

doi: 10.1103/PhysRevC.72.017301
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2005PA61      Eur.Phys.J. A 26, 147 (2005)

V.N.Panteleev, A.E.Barzakh, D.V.Fedorov, M.Menna, F.V.Moroz, Yu.M.Volkov

Integrated target-ion source unit for on-line production of radioactive short-lived isotopes

doi: 10.1140/epja/i2005-10147-6
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2004AN03      Eur.Phys.J. A 19, 341 (2004)

A.Andrighetto, A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, G.Lhersonneau, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, M.D.Seliverstov, I.M.Strachnov, L.Stroe, L.B.Tecchio, Yu.M.Volkov, X.F.Wang

Proton- and neutron-induced fission on uranium carbide target

NUCLEAR REACTIONS 238U(p, F), E=1 GeV; 238U(n, F), E=fast; measured fission product isotopic yields.

doi: 10.1140/epja/i2003-10138-7
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2004BA93      Eur.Phys.J. A 22, 69 (2004)

A.E.Barzakh, D.V.Fedorov, A.M.Ionan, V.S.Ivanov, F.V.Moroz, K.A.Mezilev, S.Yu.Orlov, V.N.Panteleev, Yu.M.Volkov

Changes in the mean square charge radii of neutron-deficient europium isotopes measured by the laser ion source resonance ionization spectroscopy

NUCLEAR MOMENTS 137,138,139,141,142m,143,144Eu; measured isotope shifts; deduced radii, deformation parameters. Laser ion source resonance ionization spectroscopy.

doi: 10.1140/epja/i2003-10231-y
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2003AN13      Nucl.Instrum.Methods Phys.Res. B204, 267 (2003)

A.Andrighetto, A.E.Barzakh, D.V.Fedorov, V.S.Ivanov, F.V.Moroz, S.Yu.Orlov, V.N.Panteleev, M.D.Seliverstov, I.M.Strachnov, L.Stroe, L.Tecchio, Yu.M.Volkov

Production of neutron rich nuclides from uranium carbide targets of different density

NUCLEAR REACTIONS U(p, X), E=1 GeV; measured fragment yields. Uranium carbide target.

doi: 10.1016/S0168-583X(02)01923-7
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2002AN15      Eur.Phys.J. A 14, 63 (2002)

A.N.Andreyev, K.Van de Vel, A.Barzakh, A.De Smet, H.De Witte, D.V.Fedorov, V.N.Fedoseyev, S.Franchoo, M.Gorska, M.Huyse, Z.Janas, U.Koster, W.Kurcewicz, J.Kurpeta, V.I.Mishin, K.Partes, A.Plochocki, P.Van Duppen, L.Weissman

Nuclear Spins, Magnetic Moments and α-Decay Spectroscopy of Long-Lived Isomeric States in 185Pb

RADIOACTIVITY 185mPb(α) [from U(p, X)]; measured Eα, Eγ, αγ-coin, T1/2. 181Hg deduced levels, possible J, π. On-line mass separator.

NUCLEAR MOMENTS 185mPb; measured hfs; deduced isomeric states J, π. Resonance ionization laser ion source.

doi: 10.1007/s10050-002-8790-5
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2002PA31      Nucl.Phys. A701, 470c (2002)

V.N.Panteleev, A.E.Barzakh, D.V.Fedorov, F.V.Moroz, S.Yu.Orlov, A.G.Poljakov, M.D.Seliverstov, Yu.M.Volkov

Development of High Temperature Targets at IRIS Facility

NUCLEAR REACTIONS C, Ta, W(p, X)6Li/7Li, E not given; C, U(p, X)89Rb/90Rb/91Rb/92Rb/93Rb/94Rb/95Rb/143Cs/144Cs/145Cs/146Cs/147Cs/148Cs, E not given; C, Nb(p, X)75Rb/77Rb/80Rb, E not given; measured yields.

doi: 10.1016/S0375-9474(01)01629-3
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2000BA16      Phys.Rev. C61, 034304 (2000)

A.E.Barzakh, I.Ya.Chubukov, D.V.Fedorov, V.N.Panteleev, M.D.Seliverstov, Yu.M.Volkov

Mean Square Charge Radii of the Neutron-Deficient Rare-Earth Isotopes in the Region of the Nuclear Shell N = 82 Measured by the Laser Ion Source Spectroscopy Technique

NUCLEAR MOMENTS 155Yb, 153,154Tm; measured hfs, isotope shifts, μ, quadrupole moments, charge radii. Resonance ionization spectroscopy, new background supression method.

doi: 10.1103/PhysRevC.61.034304
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2000SE22      Hyperfine Interactions 127, 425 (2000)

M.D.Seliverstov, A.E.Barzakh, I.Ya.Chubukov, D.V.Fedorov, V.N.Panteleev, Yu.M.Volkov

Application of the laser ion source for isotope shift and hyperfine structure investigation

NUCLEAR MOMENTS 153,154Tm, 155Yb; measured hfs, isotope shifts; deduced radii, μ, quadrupole moments. Resonance ionization spectroscopy.

doi: 10.1023/A:1012665600844
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1998BA08      Eur.Phys.J. A 1, 3 (1998)

A.E.Barzakh, I.Ya.Chubukov, D.V.Fedorov, F.V.Moroz, V.N.Panteleev, M.D.Seliverstov, Y.M.Volkov

Isotope Shift and Hyperfine Structure Measurements for 155Yb by Laser Ion Source Technique

NUCLEAR MOMENTS 155Yb; measured hfs, isotope shift, charge radius. Resonance ionization spectroscopy, laser ion source. Nearby nuclei compared.

doi: 10.1007/s100500050023
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1993BA55      Z.Phys. A346, 265 (1993)

A.E.Barzakh, V.P.Denisov

Isotonic and Isobaric Dependencies of Nuclear Charge Radii for Rare-Earth Nuclei

NUCLEAR STRUCTURE 138,146Ba, 142,146,150Nd, 152,146,144Sm, 153,145Eu, 154,146Gd, 147,155Tb, 148,156Dy, 157Ho, 150,158Er, 159Tm, 152,160Yb; analyzed isotope shifts, muonic, electron scattering data; deduced rms charge radii isotonic, isobaric dependences. Hartree-Fock calculations, droplet model.

doi: 10.1007/BF01292515
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1992AL03      J.Phys.(London) B25, 571 (1992)

G.D.Alkhazov, A.E.Barzakh, H.Huhnermann, K.Kesper, A.Mazumdar, W.Moller, R.Otto, V.N.Pantelejev, A.G.Polyakov, C.Reese, H.Wagner

Hyperfine Structure and Isotope Shift Investigations of 145Pm and 147Pm

NUCLEAR MOMENTS 145,147Pm; measured hfs, isotope shifts; deduced hyperfine constants. 145Pm deduced μ, quadrupole moment. Collinear laser ion-beam spectroscopy.

doi: 10.1088/0953-4075/25/2/023
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1992AL18      Nucl.Instrum.Methods Phys.Res. B69, 517 (1992)

G.D.Alkhazov, A.E.Barzakh, V.P.Denisov, K.A.Mezilev, Yu.N.Novikov, V.N.Panteleyev, A.V.Popov, E.P.Sudentas, V.S.Letokhov, V.I.Mishin, V.N.Fedoseyev, S.V.Andreyev, D.S.Vedeneyev, A.D.Zyuzikov

A New Highly Efficient Method of Atomic Spectroscopy for Nuclides Far from Stability

RADIOACTIVITY 154,155,156Yb; measured isotope shifts, hyperfine structure; deduced 155Yb hyperfine constants.

doi: 10.1016/0168-583X(92)95309-F
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1992AL25      Bull.Rus.Acad.Sci.Phys. 56, 1712 (1992)

G.D.Alkhazov, A.E.Barzakh, V.P.Denisov, K.A.Mezilev, Yu.N.Novikov, V.N.Panteleev, A.V.Popov, E.P.Sudentas, V.S.Letokhov, V.I.Mishin, V.N.Fedoseev, S.V.Andreev, D.S.Vedeneyev, A.D.Zyuzikov

Measurement of Isotope Shifts and Hyperfine Structure of Neutron-Deficient Yb Isotopes Using a New Highly Sensitive Method of Atomic Spectroscopy

RADIOACTIVITY 154,156,160,162,164,166Yb(α) [from Ta(p, X), E=1 GeV]; measured isotope shifts, hfs. 154Yb deduced μ, electric quadrupole moment. Laser induced resonance atom ionization in a mass separator source.


1992LE09      J.Phys.(London) G18, 1177 (1992)

V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseyev, G.D.Alkhazov, A.E.Barzakh, V.P.Denisov, V.E.Starodubsky

Laser Spectroscopic Studies of Nuclei with Neutron Number N < 82 (Eu, Sm and Nd Isotopes)

RADIOACTIVITY 135,137,139,141Nd, 139,141,141m,143,145Sm; measured hfs; deduced parameters a, b, quadrupole moments. 132,134,135,136,137,138,139,140,141Nd, 138,139,140,141,141m,142,143,145Sm, 138,139,140,141,142,143,144,145Eu; measured isotope shifts; deduced mean square charge radii. Resonance ionization spectroscopy.

NUCLEAR MOMENTS 142Nd, 144Sm; measured isotope shifts; deduced mean square charge radii. Resonance ionization spectroscopy.

doi: 10.1088/0954-3899/18/7/008
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1990AL34      Z.Phys. A337, 257 (1990)

G.D.Alkhazov, A.E.Barzakh, V.A.Bolshakov, V.P.Denisov, V.S.Ivanov, Yu.Ya.Sergeev, I.Ya.Chubukov, V.I.Tikhonov, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseyev

Odd-Even Staggering in Nuclear Charge Radii of Neutron-Rich Europium Isotopes

RADIOACTIVITY 155,156,157,158,159Eu; measured hfs, isotope shifts; deduced hyperfine constants. 155,156,157,158,159Eu deduced μ, quadrupole moment, rms charge radii differences.


1990AL36      Z.Phys. A337, 367 (1990)

G.D.Alkhazov, A.E.Barzakh, V.P.Denisov, V.S.Ivanov, I.Ya.Chubukov, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseyev

Electromagnetic Moments and Nuclear Charge Radii for Neutron-Deficient Tb Isotopes and the Deformation Jump Near Z = 64, N = 90

RADIOACTIVITY 147,148,149,150,151,152,153,155,157Tb; measured hfs, optical isotope shift; deduced μ, quadrupole moment, changes in rms charge radii, deformation jump.

NUCLEAR MOMENTS 159Tb; measured hfs, optical isotope shift; deduced μ, quadrupole moment, changes in rms charge radii, deformation jump.


1989AL27      Nucl.Phys. A504, 549 (1989)

G.D.Alkhazov, A.E.Barzakh, I.Ya.Chubukov, V.P.Denisov, V.S.Ivanov, N.B.Buyanov, V.N.Fedoseyev, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky

Nuclear Deformation of Holmium Isotopes

RADIOACTIVITY 152,152m,153,153m,154,154m,155,156,157,158,158m,159,160,160m,161,162m,163Ho; measured isotope shifts, hfs; deduced mean square charge radius, J, magnetic dipole moment, electric quadrupole moment. Resonance ionization spectroscopy.

NUCLEAR MOMENTS 165Ho; measured isotope shifts, hfs; deduced mean square charge radius, J, magnetic dipole moment, electric quadrupole moment. Resonance ionization spectroscopy.

doi: 10.1016/0375-9474(89)90557-5
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1989BA12      Yad.Fiz. 49, 39 (1989)

A.E.Barzakh, V.E.Starodubsky

Effects of Collective Motion on Isotopic Dependence of Nuclear Charge Radii

NUCLEAR STRUCTURE 136,138Sm, 140,142,144,146Sm; analyzed charge radii; deduced collectivity role in isotopic dependence.


1989BA43      Yad.Fiz. 49, 1588 (1989)

A.E.Barzakh, V.E.Starodubsky

Description of Deformed Nuclei in the Quasiparticle Lagrange Method

NUCLEAR STRUCTURE 158,160,162,164,166,170,172,174,176Yb, 155,157,161,165Ho; calculated quadrupole moments, rms charge radii. Quasiparticle Lagrange method.


1988AL04      Nucl.Phys. A477, 37 (1988)

G.D.Alkhazov, A.E.Barzakh, I.Ya.Chubukov, V.P.Denisov, V.S.Ivanov, V.N.Panteleev, V.E.Starodubsky, N.B.Buyanov, M.N.Fedoseyev, V.S.Letokhov, V.I.Mishin, S.K.Sekatskii

Nuclear Electromagnetic Moments and Charge Radii of Deformed Thulium Isotopes with the Mass Numbers A = 157-172

NUCLEAR MOMENTS 169Tm; measured hfs, isotope shifts; deduced hyperfine constants. 169Tm deduced μ, quadrupole moments, rms charge radius. Resonance ionization spectroscopy.

RADIOACTIVITY 157,158,159,160,161,162,163,164,165,166,167,168,170,171,172Tm; measured hfs, isotopes shifts; deduced hyperfine constants. 157,158,159,160,161,162,163,164,165,166,167,168,170,171,172Tm deduced μ, quadrupole moments, rms charge radii. Resonance ionization spectroscopy.

doi: 10.1016/0375-9474(88)90359-4
Citations: PlumX Metrics


1988AL40      Pisma Zh.Eksp.Teor.Fiz. 48, 373 (1988); JETP LETT.(USSR) 48, 413 (1988)

G.D.Alkhazov, A.E.Barzakh, V.P.Denisov, V.S.Ivanov, I.Ya.Chubukov, N.B.Buyanov, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseev

Mean-Square Charge Radius of the Magic Nucleus 146Gd

NUCLEAR MOMENTS 152,154,155,156,157,158,160Gd; measured isotope shifts. Atomic resonance photoionization.

RADIOACTIVITY 146,147,148,149,150,151Gd; measured isotope shifts. 146Gd deduced rms charge radius. Atomic resonance photoionization.


1988AL41      Izv.Akad.Nauk SSSR, Ser.Fiz. 52, 1651 (1988); Bull.Acad.Sci.USSR, Phys.Ser. 52, No.8, 170 (1988)

G.D.Alkhazov, A.E.Barzakh, N.B.Buyanov, V.P.Denisov, V.S.Ivanov, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseev, I.Ya.Chubukov

Trends in Mean-Square Charge Radius and Electromagnetic Moments for Samarium and Neodymium Isotopes having N < 82

NUCLEAR STRUCTURE 147,144,143,142,141,141m,140,139,138Sm; 143,142,141,140,139,138,137,136,135,134,132Nd; analyzed isotope shift, hyperfine constants data; deduced rms charge radius, μ, quadrupole moments systematics.


1987AL25      Pisma Zh.Eksp.Teor.Fiz. 46, 136 (1987); JETP.Lett.(USSR) 46, 170 (1987)

G.D.Alkhazov, A.E.Barzakh, N.B.Buyanov, V.P.Denisov, V.S.Ivanov, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseev, I.Ya.Chubukov

Differences in the Isotopic Changes in the Charge Radii of Nuclei with 50 ≤ (N, Z) ≤ 82

RADIOACTIVITY 138,139,140Eu; measured isotope shifts. 137,138,139,140,141,142,143Eu; deduced rms radius isotopic dependence. 127,128,129,130,131,132,133,134,135,136Cs, 128,129,130,131,132,133,134,135Xe, 128,129,130,131,132,133,134,135,136,137Ba, 133,134,135,136,137,138,139,140,141Nd, 137,138,139,140,141,142,143Sm deduced rms radius isotopic dependence.


1987BA07      Yad.Fiz. 45, 45 (1987)

A.E.Barzakh, V.E.Starodubsky

Hartree-Fock Description of Deformed Thulium Isotopes

NUCLEAR STRUCTURE 157,158,159,160,161,162,163,164,165,166,167,168,169Tm; calculated ground state quadrupole, magnetic moments, charge radii, binding energies. Hartree-Fock theory.


1987MI31      Zh.Eksp.Teor.Fiz. 93, 410 (1987)

V.I.Mishin, S.K.Sekatsky, V.N.Fedoseyev, N.B.Buyanov, V.S.Letokhov, G.D.Alkhazov, A.E.Barzakh, V.P.Denisov, V.S.Ivanov, I.Ya.Chubukov

Ultrasensitive Laser Resonance Photoionization Spectroscopy of Chain of 157-172Tm Radioactive Isotopes with a Proton Accelerator

NUCLEAR MOMENTS 169Tm; measured hfs, isotopic shift; deduced magnetic dipole, electric quadrupole moments. Laser resonant photoionization.

RADIOACTIVITY 157,158,159,160,161,162,163,164,165,166,167,168,170,171,172Tm; measured hfs, isotopic shifts; deduced magnetic dipole, electric quadrupole moments, rms charge radii. Laser resonant photoionization.


1986AL32      Izv.Akad.Nauk SSSR, Ser.Fiz. 50, 2366 (1986); Bull.Acad.Sci.USSR, Phys.Ser. 50, No.12, 73 (1986)

G.D.Alkhazov, A.E.Barzakh, N.B.Buyanov, V.P.Denisov, A.G.Dernyatin, V.S.Ivanov, V.S.Letokhov, V.I.Mishin, S.K.Sekatsky, V.N.Fedoseev, I.Ya.Chubukov

Hyperfine Structure and the Electromagnetic Moments of Thulium Isotopes

NUCLEAR MOMENTS 169Tm; measured hfs; deduced hyperfine constants. 169Tm deduced μ, rms charge radius.

RADIOACTIVITY 157,158,159,160,161,162,163,164,165,166,167,168,170Tm; measured hfs; deduced hyperfine constants. 157,158,159,160,161,162,163,164,165,166,167,168,170Tm deduced μ, rms charge radii.


1984AL33      Pisma Zh.Eksp.Teor.Fiz. 40, 95 (1984); JETP Lett.(USSR) 40, 836 (1984)

G.D.Alkhazov, A.E.Barzakh, E.E.Berlovich, V.P.Denisov, A.G.Dernyatin, V.S.Ivanov, V.S.Letokhov, V.I.Mishin, V.N.Fedoseev

Shell Effect in the Isotopic Dependence of the Mean Square Charge Radii of Short-Lived Europium Nuclei Measured by Laser Photoionization Detection on Line with the Accelerator

RADIOACTIVITY 141,142,143,144,145Eu(EC), (β+); measured optical isotope shifts; deduced rms charge radii isotopic dependence shell effect.


1983AL14      Pisma Zh.Eksp.Teor.Fiz. 37, 231 (1983); JEPT Lett.(USSR) 37, 274 (1983)

G.D.Alkhazov, A.E.Barzakh, E.I.Berlovich, V.P.Denisov, A.G.Dernyatin, V.S.Ivanov, A.N.Zherikhin, O.N.Kompanets, V.S.Letokhov, V.I.Mishin, V.N.Fedoseev

Measurement of Isotopic Variations in the Charge Radii of Europium Nuclei by the Method of Three-Stepped Laser Photoionization of Atoms

NUCLEAR MOMENTS 145,146,147,148,149Eu [from Ta(p, X), E=1 GeV]; measured optical isotope shifts relative to 151Eu; deduced rms charge radii.


1978NE12      Zh.Eksp.Teor.Fiz. 75, 1521 (1978); Sov.Phys.JETP 48, 769 (1978)

Y.I.Neronov, A.E.Barzakh

Determination of the Magnetic Moment of the He3 Nucleus with an Error Of 2 X 10-6%

NUCLEAR MOMENTS 3He; measured free-precession frequencies of 3He nuclei, protons, electron screening difference of nuclei in 3He atom, hydrogen molecule; deduced μ.


1977NE16      Zh.Eksp.Teor.Fiz. 72, 1659 (1977)

Yu.I.Neronov, A.E.Barzakh

Determination of the Triton-Proton Magnetic Moment Ratio with an Accuracy to (10-6)% by the NMR Technique

NUCLEAR MOMENTS 1,3H; measured NMR; deduced μ ratio. NMR pulse spectrometer, HT molecules in gas.


1975NE07      Zh.Eksp.Teor.Fiz. 69, 1872 (1975); Sov.Phys.JETP 42, 950 (1976)

Y.I.Neronov, A.E.Barzakh, K.Mukhamadiev

NMR Study of Hydrogen Isotopes to Determine the Ratio of the Proton and Deuteron Magnetic Moments to the Eighth Decimal Place

NUCLEAR MOMENTS 1,2H; measured g, isotope shift. NMR study.


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