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NSR database version of April 11, 2024.

Search: Author = A.Costin

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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 2_{1, 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 2_{1, 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, T_1/2 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, 104}Rh 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 T_1/2, 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 T_1/2, B(E2), collective features. Comparison with model predictions.

doi: 10.1103/PhysRevC.72.054305
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