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NSR database version of May 24, 2024.

Search: Author = A.Costin

Found 16 matches.

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2012AH01      Phys.Rev. C 86, 014303 (2012)

T.Ahn, G.Rainovski, N.Pietralla, L.Coquard, T.Moller, A.Costin, R.V.F.Janssens, C.J.Lister, M.P.Carpenter, S.Zhu

Identification of the 21, ms + mixed-symmetry state in 136Ce

NUCLEAR REACTIONS 12C(136Ce, 136Ce'), E=475 MeV; measured Eγ, Iγ, γγ-coin using Gammasphere array at ANL facility. Coulomb excitation. 136Ce; deduced levels, J, π, B(M1), B(E2), B(E1), B(E3), identification of one-quadrupole phonon mixed symmetry state (MSS). Systematics of energies of first 2+, and mixed-symmetry 2+ states, B(M1) in N=78 isotones. Discussed fragmentation of the one-phonon MSS of 136Ce.

doi: 10.1103/PhysRevC.86.014303
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2010BI11      Phys.Rev. C 82, 054311 (2010)

P.G.Bizzeti, A.M.Bizzeti-Sona, D.Tonev, A.Giannatiempo, C.A.Ur, A.Dewald, B.Melon, C.Michelagnoli, P.Petkov, D.Bazzacco, A.Costin, G.de Angelis, F.Della Vedova, M.Fantuzi, E.Farnea, C.Fransen, A.Gadea, S.Lenzi, S.Lunardi, N.Marginean, R.Marginean, R.Menegazzo, D.Mengoni, O.Moller, A.Nannini, D.R.Napoli, M.Nespolo, P.Pavan, A.Perego, C.M.Petrache, N.Pietralla, C.Rossi Alvarez, P.Sona

Transition probabilities in the X(5) candidate 122Ba

NUCLEAR REACTIONS 108Cd(16O, 2n), E=62, 64, 65 MeV; 112Sn(13C, 3n), E=59 MeV; measured Eγ, Iγ, γγ-coin, half-lives by recoil-distance Doppler-shift (RDDS) method using plunger device, and differential decay curve method (DDCM). 122Ba; deduced levels, B(E2). Comparison with X(5), IBA-1 and IBA-2 model calculations.

doi: 10.1103/PhysRevC.82.054311
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2009AH01      Phys.Lett. B 679, 19 (2009); Erratum Phys.Lett. B 682, 490 (2010)

T.Ahn, L.Coquard, N.Pietralla, G.Rainovski, A.Costin, R.V.F.Janssens, C.J.Lister, M.Carpenter, S.Zhu, K.Heyde

Evolution of the one-phonon 21, ms mixed-symmetry state in N=80 isotones as a local measure for the proton-neutron quadrupole interaction

NUCLEAR REACTIONS 12C(134Xe, 134Xe'), E=435 MeV; measured Eγ, Iγ, γγ-coin using DSA technique and the Gammasphere array. 134Xe; deduced levels, J, π, δ, B(E2), B(M1), related properties. Systematics of N=80, 82 isotones discussed.

doi: 10.1016/j.physletb.2009.06.066
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2009BE11      Phys.Rev. C 79, 034315 (2009)

L.Bettermann, C.Fransen, S.Heinze, J.Jolie, A.Linnemann, D.Mucher, W.Rother, T.Ahn, A.Costin, N.Pietralla, Y.Luo

Candidates for the one-phonon mixed-symmetry state in 130Xe

RADIOACTIVITY 130Cs(EC), (β+)[from 126Te(7Li, 3n), E=30 MeV]; measured Eγ, Iγ, γγ-coin, γγ(θ), mixing ratios. 130Xe; deduced levels, J, π, multipolarity. Comparison with shell-model and interacting-boson model-2 calculations.

doi: 10.1103/PhysRevC.79.034315
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2009CO03      Phys.Rev. C 79, 024307 (2009)

A.Costin, M.Reese, H.Ai, R.F.Casten, K.Dusling, C.R.Fitzpatrick, G.Gurdal, A.Heinz, E.A.McCutchan, D.A.Meyer, O.Moller, P.Petkov, N.Pietralla, J.Qian, G.Rainovski, V.Werner

Centrifugal stretching along the ground state band of 168Hf

NUCLEAR REACTIONS 124Sn(48Ti, 4n), E=190 MeV; measured Eγ, Iγ, γγ-coin, half-lives of g.s. band members using recoil-distance Doppler-shift method. 168Hf; deduced levels, J, π, B(E2). Comparison with predictions of geometrical confined β soft rotor model involving centrifugal stretching.

doi: 10.1103/PhysRevC.79.024307
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2009PI14      Phys.Lett. B 681, 134 (2009)

N.Pietralla, T.C.Li, M.Fritzsche, M.W.Ahmed, T.Ahn, A.Costin, J.Enders, J.Li, S.Muller, P.von Neumann-Cosel, I.V.Pinayev, V.Yu.Ponomarev, D.Savran, A.P.Tonchev, W.Tornow, H.R.Weller, V.Werner, Y.K.Wu, A.Zilges

Competition between excited core states and 1hω single-particle excitations at comparable energies in 207Pb from photon scattering

NUCLEAR REACTIONS 208Pb(polarized γ, γ'), E=5.5, 5.6 MeV; measured Eγ, Iγ using the azimuthal nuclear resonance fluorescence intensity asymmetry technique. 206,207,208Pb; deduced levels, J, π.

doi: 10.1016/j.physletb.2009.09.059
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2008SP01      Phys.Lett. B 659, 101 (2008)

K.-H.Speidel, S.Schielke, J.Leske, N.Pietralla, T.Ahn, A.Costin, M.v.Schmid, O.Zell, J.Gerber, P.Maier-Komor, S.J.Q.Robinson, A.Escuderos, Y.Y.Sharon, L.Zamick

First g-factor measurements on semi-magic 36S and their implications for the rigidity of the N = 20 shell closure

NUCLEAR REACTIONS 12C(36S, 36S'), (36S, 40Ar), E=70 MeV; measured Eγ, Iγ, T1/2 using transient field technique and DSA; 36S, 40Ar; deduced B(E2), g-factor. Comparison with shell model and previous results.

doi: 10.1016/j.physletb.2007.11.049
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2008SP04      Phys.Rev. C 78, 017304 (2008)

K.-H.Speidel, S.Schielke, J.Leske, N.Pietralla, T.Ahn, A.Costin, O.Zell, J.Gerber, P.Maier-Komor, S.J.Q.Robinson, A.Escuderos, Y.Y.Sharon, L.Zamick

New shell model calculations for 40Ar based on recent g-factor and lifetime measurements

NUCLEAR REACTIONS 12C(36S, 40Ar), E=70 MeV; measured Eγ, Iγ, particle spectra, γγ-coin, (particle)γ-coin, g-factors, B(E2). 40Ar; measured half-lives of 2+ and 4+ states using Doppler-shift attenuation method; deduced levels, J, π.

doi: 10.1103/PhysRevC.78.017304
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2008SU18      Phys.Rev. C 78, 031302 (2008)

T.Suzuki, G.Rainovski, T.Koike, T.Ahn, M.P.Carpenter, A.Costin, M.Danchev, A.Dewald, R.V.F.Janssens, P.Joshi, C.J.Lister, O.Moller, N.Pietralla, T.Shinozuka, J.Timar, R.Wadsworth, C.Vaman, S.Zhu

Lifetime measurement of candidate chiral doublet bands in the 103, 104Rh isotopes with the recoil-distance Doppler-shift method in inverse kinematics

NUCLEAR REACTIONS 11B(96Zr, 4n), (96Zr, 3n), E=330 MeV; measured Eγ, Iγ, γγ-coin, half-lives using recoil-distance doppler shift method. 103,104Rh; deduced levels, J, π, configurations, B(M1), B(E2).

doi: 10.1103/PhysRevC.78.031302
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2007AH02      Phys.Rev. C 75, 014313 (2007)

T.Ahn, N.Pietralla, G.Rainovski, A.Costin, K.Dusling, T.C.Li, A.Linnemann, S.Pontillo

γ-ray multipolarimetry between low-spin states of 136Ce: Search for the 2+1, ms one-phonon mixed-symmetry state

RADIOACTIVITY 136Pr(EC), (β+) [from 134Ba(6Li, 4n)]; measured Eγ, Iγ, γγ-coin. 136Ce deduced levels, J, π, δ, B(E2)/B(M1), possible mixed-symmetry state.

doi: 10.1103/PhysRevC.75.014313
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2007PI13      Nucl.Phys. A788, 85c (2007)

N.Pietralla, G.Rainovski, T.Ahn, A.Costin

Isovector Quadrupole Excitations in the Valence Shell studied in Projectile Coulomb Excitation

NUCLEAR REACTIONS 12C(138Ce, 138Ce'), E=480 MeV; measured Eγ, Iγ, angular distributions following projectile Coulomb excitation. 138Ce deduced levels, J, π, B(M1), B(E2), matrix elements, δ, mixed-symmetry state. Gammasphere array.

doi: 10.1016/j.nuclphysa.2007.01.052
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2007TI07      Phys.Rev. C 76, 024307 (2007)

J.Timar, T.Koike, N.Pietralla, G.Rainovski, D.Sohler, T.Ahn, G.Berek, A.Costin, K.Dusling, T.C.Li, E.S.Paul, K.Starosta, C.Vaman

High-spin structure of 105Ag: Search for chiral doublet bands

NUCLEAR REACTIONS 100Mo(10B, 5n), E=58, 64 MeV; measured Eγ, Iγ, γγ-coinc. 105Ag deduced levels, J, π, multipolarities.

doi: 10.1103/PhysRevC.76.024307
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2006CO20      Phys.Rev.C 74, 067301 (2006)

A.Costin, T.Ahn, B.Bochev, K.Dusling, T.C.Li, N.Pietralla, G.Rainovski, W.Rother

Lifetime measurement for the 21+ state of 170Hf

NUCLEAR REACTIONS 158Gd(16O, 4n), E=80 MeV; measured prompt and delayed Eγ, Iγ. 170Hf levels deduced T1/2, B(E2). Pulsed beam, level systematics in neighboring nuclides discussed.

doi: 10.1103/PhysRevC.74.067301
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2006DU02      Phys.Rev. C 73, 014317 (2006)

K.Dusling, N.Pietralla, G.Rainovski, T.Ahn, B.Bochev, A.Costin, T.Koike, T.C.Li, A.Linnemann, S.Pontillo, C.Vaman

Medium-spin γ-ray spectroscopy of the transitional nucleus 160Er

NUCLEAR REACTIONS 159Tb(6Li, 5n), E=52 MeV; measured Eγ, Iγ, γγ-coin. 160Er deduced levels, J, π, δ, branching ratios, collective features. Constrained β-soft rotor model analysis.

doi: 10.1103/PhysRevC.73.014317
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2006LI23      Phys.Rev. C 73, 054306 (2006)

T.C.Li, N.Pietralla, A.P.Tonchev, M.W.Ahmed, T.Ahn, C.Angell, M.A.Blackston, A.Costin, K.J.Keeter, J.Li, A.Lisetskiy, S.Mikhailov, Y.Parpottas, B.A.Perdue, G.Rainovski, W.Tornow, H.R.Weller, Y.K.Wu

First evidence for spin-flip M1 strength in 40Ar

NUCLEAR REACTIONS 40Ar(polarized γ, γ'), E=7.7-11 MeV; measured Eγ, Iγ, asymmetry. 40Ar deduced levels, J, π, excitation B(E1), B(M1), spin-flip M1 strength. Comparison with shell model predictions.

doi: 10.1103/PhysRevC.73.054306
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2005CO22      Phys.Rev. C 72, 054305 (2005)

A.Costin, N.Pietralla, T.Koike, C.Vaman, T.Ahn, G.Rainovski

Subnanosecond lifetime measurement for the T = 0, 31+ state of odd-odd N = Z 58Cu

NUCLEAR REACTIONS 58Ni(p, p'γ), (p, nγ), E=14 MeV; measured prompt and delayed Eγ, Iγ. 58Cu level deduced T1/2, B(E2), collective features. Comparison with model predictions.

doi: 10.1103/PhysRevC.72.054305
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