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NSR database version of April 27, 2024.

Search: Author = G.Trees

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2015AK02      Phys.Rev. C 91, 031301 (2015)

A.Akber, M.W.Reed, P.M.Walker, Yu.A.Litvinov, G.J.Lane, T.Kibedi, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, I.J.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, Zs.Podolyak, A.Prochazka, C.Scheidenberger, D.Shubina, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi

Increased isomeric lifetime of hydrogen-like ^192mOs

RADIOACTIVITY ^192mOs(IT)[from ⁹Be(¹⁹⁷Au, X), E=478-492 MeV/nucleon]; measured half-life of the highly-charged stored ions using Schottky mass spectrometry in Experimental Storage Ring (ESR) of the isomeric state of ¹⁹²Os at UNILAC and SIS-18 heavy-ion accelerators of GSI. Discussed increased half-life of the hydrogen-like ions of isomeric state as compared to that of the neutral ions.

doi: 10.1103/PhysRevC.91.031301
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2013SH30      Phys.Rev. C 88, 024310 (2013)

D.Shubina, R.B.Cakirli, Yu.A.Litvinov, K.Blaum, C.Brandau, F.Bosch, J.J.Carroll, R.F.Casten, D.M.Cullen, I.J.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, C.Kozhuharov, R.Knobel, J.Kurcewicz, N.Kuzminchuk, S.A.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, Z.Patyk, W.R.Plass, A.Prochazka, M.W.Reed, M.S.Sanjari, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, P.M.Walker, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi, C.Zhou

Schottky mass measurements of heavy neutron-rich nuclides in the element range 70≤Z≤79 at the GSI Experimental Storage Ring

ATOMIC MASSES ^181,183Lu, ^185,186Hf, ^187,188Ta, ^189,190,191W, ^192,193Re, ¹⁹⁵Os; measured masses by Schottky mass spectrometry (SMS) technique using FRS-ESR facility at GSI. ¹⁸¹Hf, ^{181,182,183,185}Ta, ^184,186,187W, ^189,191Re, ^{188,190,192,193}Os, ¹⁹¹Ir, ^194,196Pt, ¹⁹⁶Au; measured Schottky frequency spectra for calibration purpose; deduced mass excesses, and compared with AME-2003. ¹⁷⁹Lu, ^182,182mHf, ¹⁸⁴Ta, ^{186,187,188,190m,192m}Re, ^{189,190m,191,194}Os, ^{190,192,193,194,195}Ir, ¹⁹¹Pt; measured Schottky frequency spectra. Bare, H- or He-like isotopes produced in ⁹Be(¹⁹⁷Au, X) reaction using E(¹⁹⁷Au)=469.35 MeV/nucleon beam from UNILAC and SIS-18 accelerators at GSI. Investigated correlations between S(2n) and energies of first 2+ states in even-even N=84-124, Z=62-78 isotopes; deduced collectivity. Systematics of S(2n) values for even N=100-124, odd Z=67-77.

doi: 10.1103/PhysRevC.88.024310
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2012RE19      Phys.Rev. C 86, 054321 (2012)

M.W.Reed, P.M.Walker, I.J.Cullen, Yu.A.Litvinov, D.Shubina, G.D.Dracoulis, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.X.Dong, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, Zs.Podolyak, A.Prochazka, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, F.R.Xu, T.Yamaguchi

Long-lived isomers in neutron-rich Z=72-76 nuclides

NUCLEAR REACTIONS Be(¹⁹⁷Au, X)¹⁸³Hf/¹⁸⁴Hf/¹⁸⁶Hf/¹⁸⁶Ta/¹⁸⁷Ta, ¹⁸⁶W/¹⁹⁰W/¹⁹⁰Re/¹⁹²Re/¹⁹⁴Re/¹⁹⁴Ir/¹⁹⁴Os/¹⁹⁵Os/¹⁹⁶Pt, E=478-492 MeV/nucleon; measured Schottky mass and frequency spectra, ion revolution frequencies, survival curves of ions, isomer energies and half-lives of highly charged (helium-like, hydrogen-like, and bare) ions, γ spectra. FRS and ESR at UNILAC-SIS accelerator facility in GSI. ^183,184,186Hf, ^186,187Ta, ¹⁸⁶W, ^190,192,194Re, ¹⁹⁵Os; deduced levels, isomers, J, π, configuration, decay modes. Comparison with potential energy surface, and multi-quasiparticle (MQP) calculations. ¹⁸⁶Ta, ¹⁹²Re; calculated 2qp levels. Systematics of theoretical and experimental 2qp 8- isomers and 4qp levels in ^{170,172,174,176,178,180,182,184,186,188,190}Hf.

doi: 10.1103/PhysRevC.86.054321
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2012RE22      J.Phys.:Conf.Ser. 381, 012058 (2012)

M.W.Reed, P.M.Walker, I.J.Cullen, Yu.A.Litvinov, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, A.Y.Deo, B.Detwiler, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, A.Prochazka, C.Scheidenberger, D.Shubina, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi

Technique for Resolving Low-lying Isomers in the Experimental Storage Ring (ESR) and the Occurrence of an Isomeric State in ¹⁹²Re

doi: 10.1088/1742-6596/381/1/012058
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2011HA15      Int.J.Mod.Phys. E20, 474 (2011)

A.B.Hayes, D.Cline, C.Y.Wu, A.M.Hurst, M.P.Carpenter, J.P.Greene, R.V.F.Janssens, T.Lauritsen, D.Seweryniak, S.Zhu, S.A.Karamian, P.M.Walker, T.P.D.Swan, S.V.Rigby, D.M.Cullen, N.M.Lumley, P.Mason, J.J.Carroll, B.Detwiler, T.Harle, I.Mills, G.Trees

New structures in ¹⁷⁸Hf and Coulomb excitation of isomers

NUCLEAR REACTIONS ²⁰⁸Pb(¹⁷⁸Hf, ¹⁷⁸Hf'), E=985 MeV; measured Eγ, Iγ, particle-γ-coin.; deduced energy levels, J, π, isomer bands, rotational sequence feeding.

doi: 10.1142/S0218301311017879
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2010RE07      Phys.Rev.Lett. 105, 172501 (2010)

M.W.Reed, I.J.Cullen, P.M.Walker, Yu.A.Litvinov, K.Blaum, F.Bosch, C.Brandau, J.J.Carroll, D.M.Cullen, A.Y.Deo, B.Detwiller, C.Dimopoulou, G.D.Dracoulis, F.Farinon, H.Geissel, E.Haettner, M.Heil, R.S.Kempley, R.Knobel, C.Kozhuharov, J.Kurcewicz, N.Kuzminchuk, S.Litvinov, Z.Liu, R.Mao, C.Nociforo, F.Nolden, W.R.Plass, A.Prochazka, C.Scheidenberger, M.Steck, Th.Stohlker, B.Sun, T.P.D.Swan, G.Trees, H.Weick, N.Winckler, M.Winkler, P.J.Woods, T.Yamaguchi

Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements

NUCLEAR REACTIONS ⁹Be(¹⁹⁷Au, X)¹⁸³Hf/¹⁸⁴Hf/¹⁸⁶Hf/¹⁸⁶Ta/¹⁸⁷Ta, E=478-492 MeV/nucleon; measured Schottky frequency spectra of ions stored in an ESR storage ring; deduced T_1/2, J, π, isomer region near N=116.

doi: 10.1103/PhysRevLett.105.172501
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