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NSR database version of April 11, 2024.

Search: Author = M.Rosenbusch

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2024XI06      Phys.Rev. C 109, 035804 (2024)

W.Xian, S.Chen, S.Nikas, M.Rosenbusch, M.Wada, H.Ishiyama, D.Hou, S.Iimura, S.Nishimura, P.Schury, A.Takamine, S.Yan, F.Browne, P.Doornenbal, F.Flavigny, Y.Hirayama, Y.Ito, S.Kimura, T.M.Kojima, J.Lee, J.Liu, H.Miyatake, S.Michimasa, J.Y.Moon, S.Naimi, T.Niwase, T.Sonoda, D.Suzuki, Y.X.Watanabe, V.Werner, K.Wimmer, H.Wollnik

Mass measurements of neutron-rich A ≈ 90 nuclei constrain element abundances

doi: 10.1103/PhysRevC.109.035804
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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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2023HO11      Phys.Rev. C 108, 054312 (2023)

D.S.Hou, A.Takamine, M.Rosenbusch, W.D.Xian, S.Iimura, S.D.Chen, M.Wada, H.Ishiyama, P.Schury, Z.M.Niu, H.Z.Liang, S.X.Yan, P.Doornenbal, Y.Hirayama, Y.Ito, S.Kimura, T.M.Kojima, W.Korten, J.Lee, J.J.Liu, Z.Liu, S.Michimasa, H.Miyatake, J.Y.Moon, S.Naimi, S.Nishimura, T.Niwase, T.Sonoda, D.Suzuki, Y.X.Watanabe, K.Wimmer, H.Wollnik

First direct mass measurement for neutron-rich 112Mo with the new ZD-MRTOF mass spectrograph system

doi: 10.1103/PhysRevC.108.054312
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2023II01      Phys.Rev.Lett. 130, 012501 (2023)

S.Iimura, M.Rosenbusch, A.Takamine, Y.Tsunoda, M.Wada, S.Chen, D.S.Hou, W.Xian, H.Ishiyama, S.Yan, P.Schury, H.Crawford, P.Doornenbal, Y.Hirayama, Y.Ito, S.Kimura, T.Koiwai, T.M.Kojima, H.Koura, J.Lee, J.Liu, S.Michimasa, H.Miyatake, J.Y.Moon, S.Naimi, S.Nishimura, T.Niwase, A.Odahara, T.Otsuka, S.Paschalis, M.Petri, N.Shimizu, T.Sonoda, D.Suzuki, Y.X.Watanabe, K.Wimmer, H.Wollnik

Study of the N=32 and N=34 Shell Gap for Ti and V by the First High-Precision Multireflection Time-of-Flight Mass Measurements at BigRIPS-SLOWRI

ATOMIC MASSES 55Sc, 56,58Ti, 56,57,58,59V; measured TOF; deduced masses, nonexistence of the N=34 empirical two-neutron shell gaps for Ti and V, and the enhanced energy gap in Ca. Comparison with new Monte Carlo shell model calculations. RIKEN's Radioactive Isotope Beam Factory (RIBF).

doi: 10.1103/PhysRevLett.130.012501
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2023NI04      Phys.Rev.Lett. 130, 132502 (2023)

T.Niwase, Y.X.Watanabe, Y.Hirayama, M.Mukai, P.Schury, A.N.Andreyev, T.Hashimoto, S.Iimura, H.Ishiyama, Y.Ito, S.C.Jeong, D.Kaji, S.Kimura, H.Miyatake, K.Morimoto, J.-Y.Moon, M.Oyaizu, M.Rosenbusch, A.Taniguchi, M.Wada

Discovery of New Isotope 241U and Systematic High-Precision Atomic Mass Measurements of Neutron-Rich Pa-Pu Nuclei Produced via Multinucleon Transfer Reactions

NUCLEAR REACTIONS 198Pt(238U, X)235U/236U/237U/238U/239U/240U/241U/242U/235Pa/236Pa/237Pa/239Np/240Np/241Np/239Pu/240Pu/241Pu/242Pu, E=10.75 MeV/nucleon; measured reaction products, TOF. 241U; deduced new isotope production. The KEK Isotope Separation System (KISS) for the nuclear spectroscopy of nuclides produced via MNT reactions, installed at the RIKEN Nishina Center.

ATOMIC MASSES 235,236,237,238,239,240,241,242U, 235,236,237Pa, 239,240,241Np, 239,240,241,242Pu; measured frequencies (the first excitation step laser wavelength), TOF; deduced mass excesses. Comparison with AME2020 evaluation.

doi: 10.1103/PhysRevLett.130.132502
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2022HI07      Phys.Rev. C 106, 034326 (2022)

Y.Hirayama, M.Mukai, Y.X.Watanabe, P.Schury, H.Nakada, J.Y.Moon, T.Hashimoto, S.Iimura, S.C.Jeong, M.Rosenbusch, M.Oyaizu, T.Niwase, M.Tajima, A.Taniguchi, M.Wada, H.Miyatake

In-gas-cell laser resonance ionization spectroscopy of 200, 201Pt

NUCLEAR MOMENTS 198,200,201Pt; measured time-of-flight (TOF) spectra for ions with mass-to-charge-ratios, laser resonance ionization spectra using Multireflection time-of-flight mass spectrograph (MRTOF-MS) at KEK Isotope Separation System (KISS) of RIKEN facility. 200,201Pt; deduced differential mean-square charge radii and isotope shifts relative to those of 198Pt, magnetic dipole and electric quadrupole moments of 201Pt, β2 deformation parameters Comparison with theoretical calculations using symmetry-conserving configuration-mixing (SCCM) with Gogny D1S energy density functionals (SCCM+Gogny D1S), finite-range droplet model (FRDM), and constrained-Hartree-Fock-Bogoliubov (CHFB) theory with five-dimensional collective Hamiltonian (5DCH) based on the Gogny D1 interaction. 201Pt; deduced most likely spin-parity of 5/2-. 198,200,201Pt produced in 198Pt(136Xe, X), E=10.75 MeV/nucleon multi-nucleon transfer reactions.

doi: 10.1103/PhysRevC.106.034326
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2022MU10      Phys.Rev. C 105, 034331 (2022)

M.Mukai, Y.Hirayama, Y.X.Watanabe, H.Watanabe, H.Koura, S.C.Jeong, H.Miyatake, M.Brunet, S.Ishizawa, F.G.Kondev, G.J.Lane, Yu.A.Litvinov, T.Niwase, M.Oyaizu, Zs.Podolyak, M.Rosenbusch, P.Schury, M.Wada, P.M.Walker

Ground-state β-decay spectroscopy of 187Ta

RADIOACTIVITY 187Ta(β-)[from W(136Xe, X), E=7.2 MeV/nucleon]; measured Eγ, Iγ, βγ-coin; deduced Iβ feedings, T1/2, logft, Iγ/β-decay. 187W; deduced Eγ, multipolarities, total conversion coefficients (BrIcc calculations). Comparison to KTUY+gross theory, FRDM+QRPA and RHB+pn-RQRPAKEK calculations. Isotope Separation System (KISS) at RIKEN, an argon-gas-cell-based laser ion source combined with an on-line isotope separator.

doi: 10.1103/PhysRevC.105.034331
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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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2021NI08      Phys.Rev. C 104, 044617 (2021)

T.Niwase, M.Wada, P.Schury, P.Brionnet, S.D.Chen, T.Hashimoto, H.Haba, Y.Hirayama, D.S.Hou, S.Iimura, H.Ishiyama, S.Ishizawa, Y.Ito, D.Kaji, S.Kimura, J.Liu, H.Miyatake, J.Y.Moon, K.Morimoto, K.Morita, D.Nagae, M.Rosenbusch, A.Takamine, T.Tanaka, Y.X.Watanabe, H.Wollnik, W.Xian, S.X.Yan

α-decay-correlated mass measurement of 206, 207g, mRa using an α-TOF detector equipped multireflection time-of-flight mass spectrograph system

ATOMIC MASSES 206,207,207mRa; measured time-of-flight spectra by α-decay-correlated mass spectroscopy using multireflection time-of-flight mass spectrograph (MRTOF-MS) system, with an α-TOF detector at SHE-Mass-II facility of RIBF-RIKEN; deduced mass excesses, and compared with evaluated data in AME2020. 207mRa; deduced excitation energy of the isomer, J, π. 206,207,207mRa isotopes produced in 159Tb(51V, X), E=306 MeV, followed by separation of evaporation residues using recoil ion separator GARIS-II at RIKEN.

RADIOACTIVITY 206,207mRa(α)[from 159Tb(51V, X), E=306 MeV at RIBF-RIKEN]; measured Eα, Iα, T1/2 of decays of 206Ra and 207mRa, excitation energy of the isomer; deduced α-reduced width, configuration. Systematics of spins, parities, Eα, T1/2, α-branching ratios, reduced α widths for 203,203m,205,205m,207,207mRa. 198,199Po, 202,203At, 202,203Rn, 206,207Fr, 207Ra; observed α spectra from decays.

doi: 10.1103/PhysRevC.104.044617
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2021SC14      Phys.Rev. C 104, L021304 (2021)

P.Schury, T.Niwase, M.Wada, P.Brionnet, S.Chen, T.Hashimoto, H.Haba, Y.Hirayama, D.S.Hou, S.Iimura, H.Ishiyama, S.Ishizawa, Y.Ito, D.Kaji, S.Kimura, H.Koura, J.J.Liu, H.Miyatake, J.-Y.Moon, K.Morimoto, K.Morita, D.Nagae, M.Rosenbusch, A.Takamine, Y.X.Watanabe, H.Wollnik, W.Xian, S.X.Yan

First high-precision direct determination of the atomic mass of a superheavy nuclide

ATOMIC MASSES 257Db; measured Eα, time-of flight, distribution of time-of-flight (ToF)-correlated α-decay events using multireflection time-of-flight mass spectrograph (MRTOF-MS) at RIKEN Ring Cyclotron facility; deduced A/q and mass excess for each of the 11 observed correlated events assigned to 257Db. Comparison with AME2016 evaluated data. 257Db isotope produced in 208Pb(51V, 2n), E=306 MeV reaction, followed by separation of fragments using GARIS-II separator.

doi: 10.1103/PhysRevC.104.L021304
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2021WA15      Phys.Lett. B 814, 136088 (2021)

H.Watanabe, Y.X.Watanabe, Y.Hirayama, A.N.Andreyev, T.Hashimoto, F.G.Kondev, G.J.Lane, Yu.A.Litvinov, J.J.Liu, H.Miyatake, J.Y.Moon, A.I.Morales, M.Mukai, S.Nishimura, T.Niwase, M.Rosenbusch, P.Schury, Y.Shi, M.Wada, P.M.Walker

Beta decay of the axially asymmetric ground state of 192Re

RADIOACTIVITY 192Re(β-) [from Pt(136Xe, X)192Re, E=10.75 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, level scheme, J, π. Comparison with single-particle structure using the nuclear Skyrme-Hartree-Fock model. KEK Isotope Separation System (KISS) in RIKEN Nishina Center.

doi: 10.1016/j.physletb.2021.136088
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2021WA39      Phys.Rev. C 104, 024330 (2021)

Y.X.Watanabe, P.M.Walker, Y.Hirayama, M.Mukai, H.Watanabe, G.J.Lane, M.Ahmed, M.Brunet, T.Hashimoto, S.Ishizawa, S.Kimura, F.G.Kondev, Yu.A.Litvinov, H.Miyatake, J.Y.Moon, T.Niwase, M.Oyaizu, J.H.Park, Zs.Podolyak, M.Rosenbusch, P.Schury, M.Wada

First direct observation of isomeric decay in neutron-rich odd-odd 186Ta

RADIOACTIVITY 186Ta(β-), 186mTa(IT)[from W(136Xe, X), E=7.2 MeV/nucleon, followed by laser ionization and mass separation at the KEK Isotope Separation System (KISS) of RIBF-RIKEN facility]; measured Eγ, Iγ, (particle)γ-coin, half-lives of decays of 186Ta and neutral 186mTa from γ-decay curves. 186Ta; deduced levels, J, π, E3 multipolarity of the 161-keV isomeric transition from a comparison of measured half-life of the neutral isomer with previous measurements of the ionized isomeric state of 186Ta using the Experimental Storage Ring at GSI Darmstadt, no evidence found for the β decay mode of the 186Ta isomer.

doi: 10.1103/PhysRevC.104.024330
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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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2020CH33      Phys.Rev. C 102, 034309 (2020)

H.Choi, Y.Hirayama, S.Choi, T.Hashimoto, S.C.Jeong, H.Miyatake, J.Y.Moon, M.Mukai, T.Niwase, M.Oyaizu, M.Rosenbusch, P.Schury, A.Taniguchi, Y.X.Watanabe, M.Wada

In-gas-cell laser ionization spectroscopy of 194, 196Os isotopes by using a multireflection time-of-flight mass spectrograph

NUCLEAR MOMENTS 194,196Os; measured laser resonance spectra, time-of-flight spectra using the in-gas-cell laser ionization method and multireflection time-of-flight mass spectrograph (MRTOF-MS); deduced isotope shifts, change in mean-square charge radii and quadrupole deformation parameters. 194,196Os produced in 198Pt(136Xe, X), E=10.75 MeV/nucleon reaction at the KEK Isotope Separation System (KISS). 188,189,190,192,194,196Os; systematics of the change in mean-square charge radii and quadrupole deformation parameters, and their comparison with theoretical calculations.

doi: 10.1103/PhysRevC.102.034309
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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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2020MO25      Phys.Rev. C 102, 014301 (2020)

M.Mougeot, D.Atanasov, C.Barbieri, K.Blaum, M.Breitenfeld, A.de Roubin, T.Duguet, S.George, F.Herfurth, A.Herlert, J.D.Holt, J.Karthein, D.Lunney, V.Manea, P.Navratil, D.Neidherr, M.Rosenbusch, L.Schweikhard, A.Schwenk, V.Soma, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Examining the N=28 shell closure through high-precision mass measurements of 46-48Ar

ATOMIC MASSES 46,47,48Ar; measured Ramsey-type time-of-flight ion-cyclotron-resonances (TOF-ICR), mass excesses using the ISOLTRAP Penning trap mass spectrometer at CERN-ISOLDE. Comparison with previous experimental results, and with AME2016 and AME2012 evaluations. Radioactive argon isotopes produced in U(p, F), E=1.4 GeV reaction, and separated using ISOLTRAP on-line mass spectrometer and the ISOLDE High-Resolution Separator (HRS). Comparison with ab initio calculations using the valence space in-medium similarity renormalization group (VS-IMSRG) with self-consistent Green's function approach, and with the predictions from the UNEDF0 density functional, SDPF-U shell model. Systematics of S(2n) and pairing gaps in N=24-32 S, Cl, Ar, K, and Ca isotopes.

doi: 10.1103/PhysRevC.102.014301
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2020WA29      Phys.Rev.Lett. 125, 192505 (2020)

P.M.Walker, Y.Hirayama, G.J.Lane, H.Watanabe, G.D.Dracoulis, M.Ahmed, M.Brunet, T.Hashimoto, S.Ishizawa, F.G.Kondev, Y.A.Litvinov, H.Miyatake, J.Y.Moon, M.Mukai, T.Niwase, J.H.Park, Z.Podolyak, M.Rosenbusch, P.Schury, M.Wada, X.Y.Watanabe, W.Y.Liang, F.R.Xu

Properties of 187Ta Revealed through Isomeric Decay

RADIOACTIVITY 187Ta(IT) [from W(136Xe, X), E=7.2 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, γ-γ-, β-γ-coin.; deduced level energies, J, π, T1/2. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.125.192505
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2019AS04      Phys.Rev. C 100, 014304 (2019)

P.Ascher, N.Althubiti, D.Atanasov, K.Blaum, R.B.Cakirli, S.Grevy, F.Herfurth, S.Kreim, D.Lunney, V.Manea, D.Neidherr, M.Rosenbusch, L.Schweikhard, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Mass measurements of neutron-rich isotopes near N=20 by in-trap decay with the ISOLTRAP spectrometer

ATOMIC MASSES 33,34Mg, 34Al, 34mAl, 34Si; measured cyclotron frequency ratios, and mass excesses using the ISOLTRAP Penning-trap spectrometer at ISOLDE-CERN. Combined mass excess for 34Al and 34mAl, as the two could not be separated. Comparison with AME-2016 evaluation. The 33,34Mg and 34Al isotopes were produced in UCx(p, X), E=1.4 GeV reaction, followed by laser-ionization by RILIS at ISOLDE-CERN. 34mAl and 34Si were obtained from the decay of 34Mg.

doi: 10.1103/PhysRevC.100.014304
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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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2019HU15      Eur.Phys.J. A 55, 96 (2019)

W.J.Huang, D.Atanasov, G.Audi, K.Blaum, R.B.Cakirli, A.Herlert, M.Kowalska, S.Kreim, Yu.A.Litvinov, D.Lunney, V.Manea, M.Mougeot, M.Rosenbusch, L.Schweikhard, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Evaluation of high-precision atomic masses of A ∼ 50-80 and rare-earth nuclides measured with ISOLTRAP

NUCLEAR REACTIONS Ta, U(p, x), E=1.4 GeV; measured reactions on thick, heated target[U in the form of uranium carbide] using Penning-trap spectrometer ISOLTRAP. 52,53,54,55,56,57Cr, 55Mn, 56,59Fe, 59Co, 75,77,78,79Ga, 140Ce, 140Nd, 156Dy, 160Yb, 168mLu, 178Yb; deduced mass excess. Compared with AME2012, suggested combined mass excess value.

doi: 10.1140/epja/i2019-12775-5
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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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2018IT04      Phys.Rev.Lett. 120, 152501 (2018)

Y.Ito, P.Schury, M.Wada, F.Arai, H.Haba, Y.Hirayama, S.Ishizawa, D.Kaji, S.Kimura, H.Koura, M.MacCormick, H.Miyatake, J.Y.Moon, K.Morimoto, K.Morita, M.Mukai, I.Murray, T.Niwase, K.Okada, A.Ozawa, M.Rosenbusch, A.Takamine, T.Tanaka, Y.X.Watanabe, H.Wollnik, S.Yamaki

First Direct Mass Measurements of Nuclides around Z=100 with a Multireflection Time-of-Flight Mass Spectrograph

NUCLEAR REACTIONS 232Th(19F, 5n)246Es, E=99.6, 103 MeV;238U(18O, 5n)251Fm, E=93.9 MeV; 203Tl(48Ca, 2n)249Md, E=215 MeV; 205Tl(48Ca, 3n)250Md, E=223 MeV; 205Tl(48Ca, 2n)251Md, E=215 MeV; 238U(19F, 5n)252md, E=98.6 MeV; 208Pb(48Ca, 2n)254No, E=219 MeV; measured reaction products, TOF; deduced mass excesses. Comparison with available data.

ATOMIC MASSES 253,254Lr, 257,258Db, 261,262Bh, 266Mt; analyzed available data; deduced mass excesses.

doi: 10.1103/PhysRevLett.120.152501
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2018KI21      Int.J. Mass Spectrom. 430, 134 (2018)

S.Kimura, Y.Ito, D.Kaji, P.Schury, M.Wada, H.Haba, T.Hashimoto, Y.Hirayama, M.MacCormick, H.Miyatake, J.Y.Moon, K.Morimoto, M.Mukai, I.Murray, A.Ozawa, M.Rosenbusch, H.Schatz, A.Takamine, T.Tanaka, Y.X.Watanabe, H.Wollnik

Atomic masses of intermediate-mass neutron-deficient nuclei with relative uncertainty down to 35-ppb via multireflection time-of-flight mass spectrograph

ATOMIC MASSES 63Cu, 64,65,66Zn, 65Ga, 65,66,67Ge, 67As, 78,81Br, 80Rb, 79Sr; measured frequencies, TOF; deduced masses, new mass excess values. Comparison with AME16 evaluations.

NUCLEAR REACTIONS S(36Ar, X)63Cu/64Zn/65Zn/66Zn/65Ga/65Ge/66Ge/67Ge/67As/78Br/81Br/80Rb/79Sr, E=3.30 MeV/nucleon; measured reaction products; deduced σ. Comparison with theoretical calculations of fusion-evaporation reactions.

doi: 10.1016/j.ijms.2018.05.001
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2018MO14      Phys.Rev.Lett. 120, 232501 (2018)

M.Mougeot, D.Atanasov, K.Blaum, K.Chrysalidis, T.Day Goodacre, D.Fedorov, V.Fedosseev, S.George, F.Herfurth, J.D.Holt, D.Lunney, V.Manea, B.Marsh, D.Neidherr, M.Rosenbusch, S.Rothe, L.Schweikhard, A.Schwenk, C.Seiffert, J.Simonis, S.R.Stroberg, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Precision Mass Measurements of 58-63Cr: Nuclear Collectivity Towards the N=40 Island of Inversion

ATOMIC MASSES 58,59,60,61,62,63Cr; measured cyclotron frequency, TOF; deduced mass excesses. Comparison with AME16, theoretical calculations.

doi: 10.1103/PhysRevLett.120.232501
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2018RO14      Phys.Rev. C 97, 064306 (2018)

M.Rosenbusch, Y.Ito, P.Schury, M.Wada, D.Kaji, K.Morimoto, H.Haba, S.Kimura, H.Koura, M.MacCormick, H.Miyatake, J.Y.Moon, K.Morita, I.Murray, T.Niwase, A.Ozawa, M.Reponen, A.Takamine, T.Tanaka, H.Wollnik

New mass anchor points for neutron-deficient heavy nuclei from direct mass measurements of radium and actinium isotopes

ATOMIC MASSES 210,211,212,214Ra, 210,211,212,213,214Ac; measured time of flight, and mass excess using multireflection time-of-flight mass spectrograph (MRTOF-MS) at superheavy element (SHE) mass facility of RIKEN-KEK, and using gas-filled recoil ion separator GARIS-II at RIKEN. Comparison with values from AME-2016. Ra and Ac isotopes produced in 169Tm(48Ca, X), E=5, 6 MeV/nucleon reaction at RIKEN. Z=82-92, N=121-129; systematics of S(2n) values.

doi: 10.1103/PhysRevC.97.064306
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2017AL34      Phys.Rev. C 96, 044325 (2017)

N.A.Althubiti, D.Atanasov, K.Blaum, T.E.Cocolios, T.Day Goodacre, G.J.Farooq-Smith, D.V.Fedorov, V.N.Fedosseev, S.George, F.Herfurth, K.Heyde, S.Kreim, D.Lunney, K.M.Lynch, V.Manea, B.A.Marsh, D.Neidherr, M.Rosenbusch, R.E.Rossel, S.Rothe, L.Schweikhard, M.D.Seliverstov, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber, for the ISOLTRAP Collaboration

Spectroscopy of the long-lived excited state in the neutron-deficient nuclides 195, 197, 199Po by precision mass measurements

ATOMIC MASSES 195,195m,196,197,197m,199m,203,208Po; measured cyclotron frequency ratios, mass excesses using ISOLTRAP Penning-trap mass spectrometer at ISOLDE-CERN. The Po isotopes produced in U(p, X), E=1.4 GeV using RILIS and high-resolution mass spectrometer. 191m,193mPb, 195m,197mPo, 199m,201mRn, 203m,205mRa; deduced level energies of 13/2+ isomers in odd-A polonium isotopes from mass measurements, and other isomers from α decay. Comparison with evaluated data in AME-2016.

RADIOACTIVITY 195,195m,197,197m,199mPo(α)[from U(p, X), E=1.4 GeV using RILIS and high-resolution mass spectrometer at ISOLDE-CERN]; measured Eα, Iα.

doi: 10.1103/PhysRevC.96.044325
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2017AT01      J.Phys.(London) G44, 044004 (2017)

D.Atanasov, D.Beck, K.Blaum, C.Borgmann, R.B.Cakirli, T.Eronen, S.George, F.Herfurth, A.Herlert, M.Kowalska, S.Kreim, Y.A.Litvinov, D.Lunney, V.Manea, D.Neidherr, M.Rosenbusch, L.Schweikhard, F.Wienholtz, R.N.Wolf, K.Zuber

Precision mass measurements of cesium isotopes-new entries in the ISOLTRAP chronicles

ATOMIC MASSES 123,146,147,148Cs [from U(p, X)148Cs/147Cs/146Cs/132Cs, E=1.4 GeV]; measured the time-of-flight resonances; deduced time-of- flight ion-cyclotron resonance spectrum, mass excess. Comparison with AME2012 evaluation.

doi: 10.1088/1361-6471/aa5a20
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2017DE18      Phys.Rev. C 96, 014310 (2017);Erratum Phys.Rev. C 97, 059902 (2018)

A.de Roubin, D.Atanasov, K.Blaum, S.George, F.Herfurth, D.Kisler, M.Kowalska, S.Kreim, D.Lunney, V.Manea, E.Minaya Ramirez, M.Mougeot, D.Neidherr, M.Rosenbusch, L.Schweikhard, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Nuclear deformation in the A ≈ 100 region: Comparison between new masses and mean-field predictions

ATOMIC MASSES 100,101,102Sr, 100,101,102Rb; measured frequency ratios and mass excesses by the time-of-flight ion cyclotron resonance (ToF-ICR) method using the multireflection time-of-flight mass spectrometer (MR-ToF MS), precision Penning traps, and ISOLTRAP at ISOLDE/CERN. The Sr and Rb isotopes produced as fission fragments in U(p, F), E=1.4 GeV using uranium carbide target, and ISOLDE high-resolution separator (HRS). Comparison with previous measurements, AME-2012 evaluation, and different self-consistent mean-field calculations with different Skyrme and Gogny effective interactions. Systematics of experimental and theoretical S(2n), root mean square charge radii, and odd-even staggering for N=56-66 Rb, Sr and Kr nuclei. Discussed competition of nuclear shapes in the A=100 mass region.

doi: 10.1103/PhysRevC.96.014310
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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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2017SC02      Phys.Rev. C 95, 011305 (2017)

P.Schury, M.Wada, Y.Ito, D.Kaji, F.Arai, M.MacCormick, I.Murray, H.Haba, S.Jeong, S.Kimura, H.Koura, H.Miyatake, K.Morimoto, K.Morita, A.Ozawa, M.Rosenbusch, M.Reponen, P.-A.Soderstrom, A.Takamine, T.Tanaka, H.Wollnik

First online multireflection time-of-flight mass measurements of isobar chains produced by fusion-evaporation reactions: Toward identification of superheavy elements via mass spectroscopy

ATOMIC MASSES 204,205,206Fr, 204,205,206Rn, 204,205,206At, 204,205Po, 205Bi; measured time-of-flight spectra, precise atomic masses with reference to that of 205Fr using GARIS-II recoil ion separator GARIS-II and multireflection time-of-flight mass spectrographs (MRTOF-MS) at RILAC-RIKEN facility. Isotopes produced in 165Ho, 169Tm(40Ar, X), E=4.825, 5.16 MeV/nucleon. Comparison with AME-2012 values, and previous experimental values.

doi: 10.1103/PhysRevC.95.011305
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2017WE09      Eur.Phys.J. A 53, 153 (2017)

A.Welker, P.Filianin, N.A.S.Althubiti, D.Atanasov, K.Blaum, T.E.Cocolios, S.Eliseev, F.Herfurth, S.Kreim, D.Lunney, V.Manea, D.Neidherr, Yu.Novikov, M.Rosenbusch, L.Schweikhard, F.Wienholtz, R.N.Wolf, K.Zuber

Precision electron-capture energy in 202Pb and its relevance for neutrino mass determination

ATOMIC PHYSICS 202Tl, 202Pb; measured cyclotron frequency of ionized atoms relative to 133Cs, 181Ta16O and 203Tl using Penning trap mass spectrometer ISOLTRAP at ISOLDE (CERN); deduced electron capture Q-value. Planned using EC capture to determine electron neutrino mass in few-eV level using cryogenic micro-calorimeter.

doi: 10.1140/epja/i2017-12345-y
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2017WE16      Phys.Rev.Lett. 119, 192502 (2017)

A.Welker, N.A.S.Althubiti, D.Atanasov, K.Blaum, T.E.Cocolios, F.Herfurth, S.Kreim, D.Lunney, V.Manea, M.Mougeot, D.Neidherr, F.Nowacki, A.Poves, M.Rosenbusch, L.Schweikhard, F.Wienholtz, R.N.Wolf, K.Zuber

Binding Energy of 79Cu: Probing the Structure of the Doubly Magic 78Ni from Only One Proton Away

ATOMIC MASSES 75,76,77,78,79Cu; measured TOF ion-cyclotron resonance; deduced mass excess. Comparison with AME2016 evaluation.

doi: 10.1103/PhysRevLett.119.192502
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2015AT03      Phys.Rev.Lett. 115, 232501 (2015)

D.Atanasov, P.Ascher, K.Blaum, R.B.Cakirli, T.E.Cocolios, S.George, S.Goriely, F.Herfurth, H.-T.Janka, O.Just, M.Kowalska, S.Kreim, D.Kisler, Y.A.Litvinov, D.Lunney, V.Manea, D.Neidherr, M.Rosenbusch, L.Schweikhard, A.Welker, F.Wienholtz, R.N.Wolf, K.Zuber

Precision Mass Measurements of 129-131Cd and Their Impact on Stellar Nucleosynthesis via the Rapid Neutron Capture Process

ATOMIC MASSES 129,130,131Cd; measured TOF-ICR resonance spectra; deduced masses, corrections to the existing values, neutron separation energies. Penning-trap spectrometer ISOLTRAP at ISOLDE/CERN.

doi: 10.1103/PhysRevLett.115.232501
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2015RO10      Phys.Rev.Lett. 114, 202501 (2015)

M.Rosenbusch, P.Ascher, D.Atanasov, C.Barbieri, D.Beck, K.Blaum, Ch.Borgmann, M.Breitenfeldt, R.B.Cakirli, A.Cipollone, S.George, F.Herfurth, M.Kowalska, S.Kreim, D.Lunney, V.Manea, P.Navratil, D.Neidherr, L.Schweikhard, V.Soma, J.Stanja, F.Wienholtz, R.N.Wolf, K.Zuber

Probing the N=32 Shell Closure below the Magic Proton Number Z=20: Mass Measurements of the Exotic Isotopes 52, 53K

ATOMIC MASSES 52,53K; measured time-of-flight spectra for nuclides; deduced masses. Comparison with Skyrme-Hartree-Fock-Bogoliubov and ab initio Gorkov-Green function calculations.

doi: 10.1103/PhysRevLett.114.202501
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2014BO26      Phys.Rev. C 90, 044307 (2014)

Ch.Bohm, Ch.Borgmann, G.Audi, D.Beck, K.Blaum, M.Breitenfeldt, R.B.Cakirli, T.E.Cocolios, S.Eliseev, S.George, F.Herfurth, A.Herlert, M.Kowalska, S.Kreim, D.Lunney, V.Manea, E.Minaya Ramirez, S.Naimi, D.Neidherr, M.Rosenbusch, L.Schweikhard, J.Stanja, M.Wang, R.N.Wolf, K.Zuber

Evolution of nuclear ground-state properties of neutron-deficient isotopes around Z=82 from precision mass measurements

ATOMIC MASSES 184,186,190m,193m,194,194m,195,195m,198,198mTl, 202,208Pb, 207,208Fr, 224Ra; measured cyclotron frequencies high-precision mass excesses using Penning-trap ISOLTRAP at ISOLDE/CERN; deduced S(2n), S(2p), pairing gap parameter, odd-even effect. Isotopes produced by impinging a 1.4-GeV proton beam on a thick, high-temperature uranium carbide (UCx) target. Comparison with other experimental results, AME-03, AME-12 evaluations, and microscopic calculations assuming spherical shape of the ground states. Systematics of pairing gaps, S(2p), S(2n), and excitation energy of the (9/2-) isomers for N=96-124 Au and Tl nuclei. Analyzed gradual development of collectivity with proton removal in Z=82.

doi: 10.1103/PhysRevC.90.044307
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2014KR09      Phys.Rev. C 90, 024301 (2014)

S.Kreim, D.Beck, K.Blaum, Ch.Borgmann, M.Breitenfeldt, T.E.Cocolios, A.Gottberg, F.Herfurth, M.Kowalska, Yu.A.Litvinov, D.Lunney, V.Manea, T.M.Mendonca, S.Naimi, D.Neidherr, M.Rosenbusch, L.Schweikhard, Th.Stora, F.Wienholtz, R.N.Wolf, K.Zuber

Competition between pairing correlations and deformation from the odd-even mass staggering of francium and radium isotopes

ATOMIC MASSES 222,224,226,227,228,229,230,231,232,233Fr, 233,234Ra[isotopes from U(p, F), E=1.4 GeV]; measured TOF-ICR resonances, frequency ratios, mass excesses using ISOLTRAP Penning-trap at ISOLDE-CERN facility; deduced odd-even staggering in binding energies, S(2n), three-point pairing-gap estimator Δ3(N); calculated Nilsson single-particle level schemes for N=128-148 nuclei using HF and HFB approaches, and connections to the single-particle level density and nuclear quadrupole and octupole deformations. Comparison with mass measurements using ESR at GSI and AME-2003 evaluation.

RADIOACTIVITY 233Fr(β-)[from U(p, F), E=1.4 GeV]; measured (ion)β correlations, ground-state half-life.

doi: 10.1103/PhysRevC.90.024301
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2013KR15      Nucl.Instrum.Methods Phys.Res. B317, 492 (2013)

S.Kreim, D.Atanasov, D.Beck, K.Blaum, Ch.Bohm, Ch.Borgmann, M.Breitenfeldt, T.E.Cocolios, D.Fink, S.George, A.Herlert, A.Kellerbauer, U.Koster, M.Kowalska, D.Lunney, V.Manea, E.Minaya Ramirez, S.Naimi, D.Neidherr, T.Nicol, R.E.Rossel, M.Rosenbusch, L.Schweikhard, J.Stanja, F.Wienholtz, R.N.Wolf, K.Zuber

Recent exploits of the ISOLTRAP mass spectrometer

ATOMIC MASSES 191Au; measured time-of-flight ion-cyclotron resonance spectra; deduced mass excess. Comparison with available data.

doi: 10.1016/j.nimb.2013.07.072
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2013MA81      Phys.Rev. C 88, 054322 (2013)

V.Manea, D.Atanasov, D.Beck, K.Blaum, C.Borgmann, R.B.Cakirli, T.Eronen, S.George, F.Herfurth, A.Herlert, M.Kowalska, S.Kreim, Yu.A.Litvinov, D.Lunney, D.Neidherr, M.Rosenbusch, L.Schweikhard, F.Wienholtz, R.N.Wolf, K.Zuber

Collective degrees of freedom of neutron-rich A≈100 nuclei and the first mass measurement of the short-lived nuclide 100Rb

ATOMIC MASSES 98,99,100Rb; measured time-of-flight ion-cyclotron resonance, mass excesses using ISOLTRAP at ISOLDE-CERN facility. Comparison with AME-12 evaluation. No evidence found for isomer in 98Rb.

NUCLEAR STRUCTURE Z=36-44, N=48-65; calculated S(2n), mean-square charge radii, and energies of octupole correlations using HFB theory with SLy4 and Gogny-D1S potentials. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.054322
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2013ST25      Phys.Rev. C 88, 054304 (2013)

J.Stanja, Ch.Borgmann, J.Agramunt, A.Algora, D.Beck, K.Blaum, Ch.Bohm, M.Breitenfeldt, T.E.Cocolios, L.M.Fraile, F.Herfurth, A.Herlert, M.Kowalska, S.Kreim, D.Lunney, V.Manea, E.Minaya Ramirez, S.Naimi, D.Neidherr, M.Rosenbusch, L.Schweikhard, G.Simpson, F.Wienholtz, R.N.Wolf, K.Zuber

Mass spectrometry and decay spectroscopy of isomers across the Z=82 shell closure

ATOMIC MASSES 190mTl, 194Tl, 194mTl, 198At; measured time-of-flight ion cyclotron (TOF-ICR) resonances, mass excesses using RILIS and ISOLTRAP at ISOLDE-CERN facility; deduced level energies, J, π for ground states and isomers, Q values for decays. 190Tl, 194Bi, 194mBi, 198mAt, 202Fr, 202mFr, 206Ac, 206mAc; deduced mass excesses in α-decay chains using measured mass values for 7(+) state in 190mTl and (3+) in 198At. Comparison with AME-03 data. Discussed hyperfine structure for 198,198mAt and state assignments from another experiment at ISOLTRAP-ISOLDE-CERN facility.

RADIOACTIVITY 190,194Tl(β-); measured Eγ, βγ-coin correlated with implants, half-lives of parent states, Q values for decays. Systematics of levels, J, π, μ in isomeric states of 184,186,188,190,192,194,196,198,200,202,204Tl.

doi: 10.1103/PhysRevC.88.054304
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2013WI06      Nature(London) 498, 346 (2013), Erratum Nature(London) 498, 346 (2013)

F.Wienholtz, D.Beck, K.Blaum, Ch.Borgmann, M.Breitenfeldt, R.B.Cakirli, S.George, F.Herfurth, J.D.Holt, M.Kowalska, S.Kreim, D.Lunney, V.Manea, J.Menendez, D.Neidherr, M.Rosenbusch, L.Schweikhard, A.Schwenk, J.Simonis, J.Stanja, K.Zuber

Masses of exotic calcium isotopes pin down nuclear forces

ATOMIC MASSES 51,52,53,54Ca; measured TOF, ion cyclotron resonance frequency ratio; deduced masses. ISOLTRAP high-resolution Penning trap, shell-model calculations with KB3G and GXPF1A interactions.

doi: 10.1038/nature12226
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2013WO05      Int.J. Mass Spectrom. 349-350, 123 (2013)

R.N.Wolf, F.Wienholtz, D.Atanasov, D.Beck, K.Blaum, Ch.Borgmann, F.Herfurth, M.Kowalska, S.Kreim, Yu.A.Litvinov, D.Lunney, V.Manea, D.Neidherr, M.Rosenbusch, L.Schweikhard, J.Stanja, K.Zuber

ISOLTRAP's multi-reflection time-of-flight mass separator/spectrometer

ATOMIC MASSES 137Eu; measured time of flight of ions ejected from the precision Penning trap as a function of excitation frequency; deduced masses. Comparison with available data.

doi: 10.1016/j.ijms.2013.03.020
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2013WO06      Phys.Rev.Lett. 110, 041101 (2013)

R.N.Wolf, D.Beck, K.Blaum, Ch.Bohm, Ch.Borgmann, M.Breitenfeldt, N.Chamel, S.Goriely, F.Herfurth, M.Kowalska, S.Kreim, D.Lunney, V.Manea, E.Minaya Ramirez, S.Naimi, D.Neidherr, M.Rosenbusch, L.Schweikhard, J.Stanja, F.Wienholtz, K.Zuber

Plumbing Neutron Stars to New Depths with the Binding Energy of the Exotic Nuclide 82Zn

ATOMIC MASSES 82Zn; measured time-of-flight resonance, mean frequency ratio; deduced mass. ISOLTRAP setup at the ISOLDE-CERN facility.

doi: 10.1103/PhysRevLett.110.041101
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2012FI01      Phys.Rev.Lett. 108, 062502 (2012)

D.Fink, J.Barea, D.Beck, K.Blaum, Ch.Bohm, Ch.Borgmann, M.Breitenfeldt, F.Herfurth, A.Herlert, J.Kotila, M.Kowalska, S.Kreim, D.Lunney, S.Naimi, M.Rosenbusch, S.Schwarz, L.Schweikhard, F.Simkovic, J.Stanja, K.Zuber

Q Value and Half-Lives for the Double-β-Decay Nuclide 110Pd

RADIOACTIVITY 110Pd(2β-); measured resonance frequencies;deduced precise Q-value. Comparison with AME2003 atomic mass evaluation, phase-space factor calculations.

doi: 10.1103/PhysRevLett.108.062502
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2012NA15      Phys.Rev. C 86, 014325 (2012)

S.Naimi, G.Audi, D.Beck, K.Blaum, Ch.Bohm, Ch.Borgmann, M.Breitenfeldt, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, D.Neidherr, M.Rosenbusch, L.Schweikhard, R.N.Wolf, K.Zuber

Surveying the N=40 island of inversion with new manganese masses

ATOMIC MASSES 48Ti, 55,57,58,58m,59,60,60m,61,62,62m,63,64,65,66Mn, 61,62,63Fe; measured frequency ratio using RILIS facility and ISOLTRAP mass spectrometer at CERN facility, with reference to frequencies for 39K, TiO, 55Mn and 85Rb; deduced and evaluated mass excesses and compared with AME-2003. Z=24-36, N=30-52; systematics of S(2n) values. Z=25-26, N=29-40; systematics of neutron pairing gaps. Z=25, N=28-41; systematics of S(n) values. Proposed collectivity around N=40, and island of inversion near 63Mn.

doi: 10.1103/PhysRevC.86.014325
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2010BR02      Phys.Rev. C 81, 034313 (2010)

M.Breitenfeldt, Ch.Borgmann, G.Audi, S.Baruah, D.Beck, K.Blaum, Ch.Bohm, R.B.Cakirli, R.F.Casten, P.Delahaye, M.Dworschak, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, S.Naimi, D.Neidherr, M.Rosenbusch, R.Savreux, S.Schwarz, L.Schweikhard, C.Yazidjian

Approaching the N=82 shell closure with mass measurements of Ag and Cd isotopes

ATOMIC MASSES 112,114,115,116,117,118,119,120,121,122,123,124Ag, 114,120,122,123,124,126,128Cd; measured cyclotron frequencies relative to 133Cs, and mass excesses using ISOLTRAP Penning trap spectrometer; deduced excitation energies of the isomers; evaluated mass excesses; two-neutron separate energies, and proton-neutron interaction strength δVpn. Comparison with previous data and AME-2003.

doi: 10.1103/PhysRevC.81.034313
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2010EL11      Phys.Lett. B 693, 426 (2010)

S.Eliseev, Ch.Bohm, D.Beck, K.Blaum, M.Breitenfeldt, V.N.Fedosseev, S.George, F.Herfurth, A.Herlert, H.-J.Kluge, M.Kowalska, D.Lunney, S.Naimi, D.Neidherr, Yu.N.Novikov, M.Rosenbusch, L.Schweikhard, S.Schwarz, M.Seliverstov, K.Zuber

Direct mass measurements of 194Hg and 194Au: A new route to the neutrino mass determination?

ATOMIC MASSES 194Au, 194Hg; measured cyclotron frequency ratio; deduced mass excesses, Q-value of the orbital electron capture. Implications for β-decay anti-neutrino mass measurements.

doi: 10.1016/j.physletb.2010.08.071
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2010NA13      Phys.Rev.Lett. 105, 032502 (2010)

S.Naimi, G.Audi, D.Beck, K.Blaum, Ch.Bohm, Ch.Borgmann, M.Breitenfeldt, S.George, F.Herfurth, A.Herlert, M.Kowalska, S.Kreim, D.Lunney, D.Neidherr, M.Rosenbusch, S.Schwarz, L.Schweikhard, K.Zuber

Critical-Point Boundary for the Nuclear Quantum Phase Transition Near A=100 from Mass Measurements of 96, 97Kr

ATOMIC MASSES 80,86,87,94,96,97Kr; measured cyclotron frequencies and ratios; deduced mass excess, deformation. Penning-trap mass spectrometer at ISOLDE, CERN.

doi: 10.1103/PhysRevLett.105.032502
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2009KO35      Eur.Phys.J. A 42, 351 (2009)

M.Kowalska, S.Naimi, J.Agramunt, A.Algora, G.Audi, D.Beck, B.Blank, K.Blaum, Ch.Bohm, M.Breitenfeldt, E.Estevez, L.M.Fraile, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, D.Lunney, E.Minaya-Ramirez, D.Neidherr, B.Olaizola, K.Riisager, M.Rosenbusch, B.Rubio, S.Schwarz, L.Schweikhard, U.Warring

Preparing a journey to the east of 208Pb with ISOLTRAP: Isobaric purification at A = 209 and new masses for 211-213Fr and 211Ra

ATOMIC MASSES 211,212,213Fr, 211Ra; measured masses using Penning trap at ISOLDE.

doi: 10.1140/epja/i2009-10835-1
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2009NE03      Phys.Rev.Lett. 102, 112501 (2009)

D.Neidherr, G.Audi, D.Beck, K.Blaum, Ch.Bohm, M.Breitenfeldt, R.B.Cakirli, R.F.Casten, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, S.Naimi, E.Noah, L.Penescu, M.Rosenbusch, S.Schwarz, L.Schweikhard, T.Stora

Discovery of 229Rn and the Structure of the Heaviest Rn and Ra Isotopes from Penning-Trap Mass Measurements

ATOMIC MASSES 220,223,224,225,226,227,228,229Rn; measured masses using ISOLTRAP mass spectrometer.

doi: 10.1103/PhysRevLett.102.112501
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2009NE11      Phys.Rev. C 80, 044323 (2009)

D.Neidherr, R.B.Cakirli, G.Audi, D.Beck, K.Blaum, Ch.Bohm, M.Breitenfeldt, R.F.Casten, S.George, F.Herfurth, A.Herlert, A.Kellerbauer, M.Kowalska, D.Lunney, E.Minaya-Ramirez, S.Naimi, M.Rosenbusch, S.Schwarz, L.Schweikhard

High-precision Penning-trap mass measurements of heavy xenon isotopes for nuclear structure studies

ATOMIC MASSES 136,137,138,139,140,141,142,143,144,145,146Xe; measured masses using the ISOLTRAP double Penning-trap mass spectrometer at ISOLDE-CERN facility. Comparison with earlier measurements and AME-2003 evaluation. Z=50-78, N=78-112; systematics of S(2n) values. N=74-92, Z=52-58, even Z; N=119-141, odd N, Z=84-90, odd Z; Z=50-82, N=82-126; systematics of proton-neutron interaction strengths.

doi: 10.1103/PhysRevC.80.044323
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