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NSR database version of April 11, 2024.

Search: Author = V.Y.Ponomarev

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2023FE08      Phys. Rev. Res. 5, L022044 (2023)

R.W.Fearick, P.von Neumann-Cosel, S.Bacca, J.Birkhan, F.Bonaiti, I.Brandherm, G.Hagen, H.Matsubara, W.Nazarewicz, N.Pietralla, V.Yu.Ponomarev, P.-G.Reinhard, X.Roca-Maza, A.Richter, A.Schwenk, J.Simonis, and A.Tamii

Electric dipole polarizability of 40Ca

NUCLEAR REACTIONS 40Ca(p, p'), E=5-25 MeV; measured reaction products, Ep, Ip; deduced electric dipole strength distribution, σ(θ, E). Comparison with available data. The Grand Raiden spectrometer, RCNP, Osaka.

doi: 10.1103/PhysRevResearch.5.L022044
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2022CA19      Phys.Lett. B 833, 137374 (2022)

J.Carter, L.M.Donaldson, H.Fujita, Y.Fujita, M.Jingo, C.O.Kureba, M.B.Latif, E.Litvinova, F.Nemulodi, P.von Neumann-Cosel, R.Neveling, P.Papakonstantinou, P.Papka, L.Pellegri, V.Yu.Ponomarev, A.Richter, R.Roth, E.Sideras-Haddad, F.D.Smit, J.A.Swartz, A.Tamii, R.Trippel, I.T.Usman, H.Wibowo

Damping of the isovector giant dipole resonance in 40, 48Ca

NUCLEAR REACTIONS 40,48Ca(p, p'), E=200 MeV; measured reaction products; deduced σ(θ, E), Coulomb σ, contributions from the IsoScalar Giant Monopole Resonance (ISGMR) and the ISGQR lying under the IsoVector Giant Dipole Resonance (IVGDR). Comparison with calculations in the framework of RPA and beyond-RPA in a relativistic approach based on an effective meson-exchange interaction, with the UCOM effective interaction. The Separated Sector Cyclotron (SSC) at the iThemba Laboratory for Accelerator Based Sciences (iThemba LABS), Cape Town, South Africa.

doi: 10.1016/j.physletb.2022.137374
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2021IS05      Phys.Rev. C 103, 044317 (2021)

J.Isaak, D.Savran, B.Loher, T.Beck, U.Friman-Gayer, Krishichayan, N.Pietralla, V.Yu.Ponomarev, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger

Dipole response in 128, 130Te below the neutron threshold

NUCLEAR REACTIONS 128,130Te(γ, γ'), (polarized γ, γ'), E=6.0, 9.13 MeV for 128Te and 6.4, 8.5 MeV for 130Te from Darmstadt high-intensity photon beams (DHIPS), and 2.76-8.92 MeV for 128Te and 5.5-8.5 MeV for 130Te linearly polarized and quasimonochromatic photon beams from TUNL HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization). 128,130Te; deduced levels below the neutron threshold, pygmy dipole resonance (PDR), J, π, γ-branching ratios to the first excited 2+ states, Γ02/Γ, photoabsorption cross sections, B(E1), dominant 1- states. Comparison with predictions of quasiparticle phonon model. Detailed data for levels given in the Supplemental Material of the paper.

doi: 10.1103/PhysRevC.103.044317
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2021MA62      Phys.Lett. B 820, 136569 (2021)

K.R.Mashtakov, V.Yu.Ponomarev, M.Scheck, S.W.Finch, J.Isaak, M.Zweidinger, O.Agar, C.Bathia, T.Beck, J.Beller, M.Bowry, R.Chapman, M.M.R.Chishti, U.Friman-Gayer, L.P.Gaffney, P.E.Garrett, E.T.Gregor, J.M.Keatings, U.Koster, B.Loher, A.D.MacLean, D.O'Donnell, H.Pai, N.Pietralla, G.Rainovski, M.Ramdhane, C.Romig, G.Rusev, D.Savran, G.S.Simpson, J.Sinclair, K.Sonnabend, P.Spagnoletti, A.P.Tonchev, W.Tornow

Structure of high-lying levels populated in the 96Y → 96Zr β decay

RADIOACTIVITY 96Y(β-) [from 235U(n, F), E thermal]; measured decay products, Eγ, Iγ, Eβ, Iβ; deduced γ-ray energies, B(E1), branching ratios, Gamow-Teller transition probabilities B(GT). Quasiparticle Phonon Model. Institut Laue Langevin (ILL), LOHENGRIN separator.

doi: 10.1016/j.physletb.2021.136569
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2020AV04      Phys.Lett. B 811, 135951 (2020)

R.Avigo, O.Wieland, A.Bracco, F.Camera, F.Ameil, T.Arici, A.Atac, D.Barrientos, D.Bazzacco, P.Bednarczyk, G.Benzoni, B.Birkenbach, N.Blasi, H.C.Boston, S.Bottoni, S.Brambilla, B.Bruyneel, M.Ciemala, E.Clement, M.L.Cortes, F.C.L.Crespi, D.M.Cullen, D.Curien, F.Didierjean, C.Domingo-Pardo, G.Duchene, J.Eberth, A.Gorgen, A.Gadea, J.Gerl, N.Goel, P.Golubev, V.Gonzalez, M.Gorska, A.Gottardo, E.Gregor, G.Guastalla, T.Habermann, L.J.Harkness-Brennan, A.Jungclaus, M.Kmiecik, I.Kojouharov, W.Korten, N.Kurz, M.Labiche, N.Lalovic, S.Leoni, M.Lettmann, A.Maj, R.Menegazzo, D.Mengoni, E.Merchan, B.Million, A.I.Morales, D.R.Napoli, C.Nociforo, J.Nyberg, N.Pietralla, S.Pietri, Zs.Podolyak, V.Yu.Ponomarev, A.Pullia, B.Quintana, G.Rainovski, D.Ralet, F.Recchia, M.Reese, P.Regan, P.Reiter, S.Riboldi, D.Rudolph, M.D.Salsac, E.Sanchis, L.G.Sarmiento, H.Schaffner, J.Simpson, O.Stezowski, J.J.Valiente-Dobon, H.J.Wollersheim

Low-lying electric dipole γ-continuum for the unstable 62, 64Fe nuclei: Strength evolution with neutron number

NUCLEAR REACTIONS 197Au(62Fe, 62Fe'), (64Fe, 64Fe'), E=400-440 MeV/nucleon; measured reaction products, Eγ, Iγ. 62,64Fe; deduced γ-ray energies, B(E1). Comparison with the quasi-particle phonon model (QPM) calculations. FRS spectrometer, AGATA.

doi: 10.1016/j.physletb.2020.135951
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2020BA47      Phys.Rev. C 102, 034327 (2020)

S.Bassauer, P.von Neumann-Cosel, P.-G.Reinhard, A.Tamii, S.Adachi, C.A.Bertulani, P.Y.Chan, A.D'Alessio, H.Fujioka, H.Fujita, Y.Fujita, G.Gey, M.Hilcker, T.H.Hoang, A.Inoue, J.Isaak, C.Iwamoto, T.Klaus, N.Kobayashi, Y.Maeda, M.Matsuda, N.Nakatsuka, S.Noji, H.J.Ong, I.Ou, N.Pietralla, V.Yu.Ponomarev, M.S.Reen, A.Richter, M.Singer, G.Steinhilber, T.Sudo, Y.Togano, M.Tsumura, Y.Watanabe, V.Werner

Electric and magnetic dipole strength in 112, 114, 116, 118, 120, 124Sn

NUCLEAR REACTIONS 112,114,116,118,120,124Sn(p, p'), E=295 MeV; measured E(p), I(p), particle spectra through identification via the correlation of energy loss and time of flight (ToF), double differential σ(θ, E(exc)) using Grand Raiden spectrometer at RCNP accelerator facility; deduced photoabsorption cross sections due to E1 and M1 excitations from multipole decomposition analysis (MDA) after subtraction of the ISGMR and ISGQR contributions, σ, energy and width of isovector giant dipole resonance (IVGDR), B(E1) and B(M1) strengths in the excitation energy range of 6-20 MeV, dipole polarizability. Comparison with previous experimental results from (γ, xn) and (γ, γ') experiments.

doi: 10.1103/PhysRevC.102.034327
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2020BA50      Phys.Lett. B 810, 135804 (2020)

S.Bassauer, P.von Neumann-Cosel, P.-G.Reinhard, A.Tamii, S.Adachi, C.A.Bertulani, P.Y.Chan, G.Colo, A.D'Alessio, H.Fujioka, H.Fujita, Y.Fujita, G.Gey, M.Hilcker, T.H.Hoang, A.Inoue, J.Isaak, C.Iwamoto, T.Klaus, N.Kobayashi, Y.Maeda, M.Matsuda, N.Nakatsuka, S.Noji, H.J.Ong, I.Ou, N.Paar, N.Pietralla, V.Yu.Ponomarev, M.S.Reen, A.Richter, X.Roca-Maza, M.Singer, G.Steinhilber, T.Sudo, Y.Togano, M.Tsumura, Y.Watanabe, V.Werner

Evolution of the dipole polarizability in the stable tin isotope chain

NUCLEAR REACTIONS 112,114,116,118,120,124Sn(p, p'), E=295 MeV; 116Sn(γ, X), E<30 MeV; measured reaction products, Ep, Ip; deduced σ(θ, E), σ, total dipole polarizability. Comparison with available data.

doi: 10.1016/j.physletb.2020.135804
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2020DA10      Phys.Rev. C 102, 011302 (2020)

A.D'Alessio, T.Mongelli, M.Arnold, S.Bassauer, J.Birkhan, I.Brandherm, M.Hilcker, T.Huther, J.Isaak, L.Jurgensen, T.Klaus, M.Mathy, P.von Neumann-Cosel, N.Pietralla, V.Yu.Ponomarev, P.C.Ries, R.Roth, M.Singer, G.Steinhilber, K.Vobig, V.Werner

Precision measurement of the E2 transition strength to the 2+1 state of 12C

NUCLEAR REACTIONS 12C(e, e'), E=42.5 MeV; measured scattered E(e), I(e) using the LINTOTT spectrometer at the Darmstadt S-DALINAC facility; deduced form factor, B(E2) and quadrupole moment for the first 2+ state in 12C. Comparison in-medium no-core shell model (IM-NCSM) calculations with NLO to N3LO interactions, and with previous experimental results.

doi: 10.1103/PhysRevC.102.011302
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2020DO11      Phys.Rev. C 102, 064327 (2020)

L.M.Donaldson, J.Carter, P.von Neumann-Cosel, V.O.Nesterenko, R.Neveling, P.-G.Reinhard, I.T.Usman, P.Adsley, C.A.Bertulani, J.W.Brummer, E.Z.Buthelezi, G.R.J.Cooper, R.W.Fearick, S.V.Fortsch, H.Fujita, Y.Fujita, M.Jingo, N.Y.Kheswa, W.Kleinig, C.O.Kureba, J.Kvasil, M.Latif, K.C.W.Li, J.P.Mira, F.Nemulodi, P.Papka, L.Pellegri, N.Pietralla, V.Yu.Ponomarev, B.Rebeiro, A.Richter, N.Yu.Shirikova, E.Sideras-Haddad, A.V.Sushkov, F.D.Smit, G.F.Steyn, J.A.Swartz, A.Tamii

Fine structure of the isovector giant dipole resonance in 142-150Nd and 152Sm

NUCLEAR REACTIONS 142,144,146,148,150Nd, 152Sm(p, p'), E=200 MeV from the Separated Sector Cyclotron (SSC) at iThemba LABS; measured reaction products, E(p), I(p), time-of-flight using the K600 magnetic spectrometer, two multiwire drift chambers (MWDCs) and two plastic scintillators; deduced double-differential σ(E*=10-22 MeV), equivalent photoabsorption spectra, excitation-energy spectra, wavelet power spectra, fine structure of the isovector giant-dipole resonance (IVGDR), fragmentation of the one-particle-one-hole (1p1h) strength into several dominant transitions serving as doorway states in the spherical and intermediate spherical/deformed nuclei. Comparison with predictions of quasiparticle phonon model (QPM), and Skyrme separable random phase approximation (SSRPA).

doi: 10.1103/PhysRevC.102.064327
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0860.


2020JA08      Eur.Phys.J. A 56, 162 (2020)

D.H.Jakubassa-Amundsen, V.Yu.Ponomarev

On the excitation of the 2+1 state in 12C in the (e, e'γ) reaction

doi: 10.1140/epja/s10050-020-00147-3
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2019PO09      Eur.Phys.J. A 55, 236 (2019)

V.Yu.Ponomarev, D.H.Jakubassa-Amundsen, A.Richter, J.Wambach

Excitation of the electric pygmy dipole resonance by inelastic electron scattering

doi: 10.1140/epja/i2019-12784-4
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2019VO14      Eur.Phys.J. A 55, 224 (2019)

P.von Neumann-Cosel, V.Yu.Ponomarev, A.Richter, J.Wambach

Gross, intermediate and fine structure of nuclear giant resonances: Evidence for doorway states

doi: 10.1140/epja/i2019-12795-1
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2018DI14      Phys.Rev. C 98, 054314 (2018)

B.Dietz, B.A.Brown, U.Gayer, N.Pietralla, V.Yu.Ponomarev, A.Richter, P.C.Ries, V.Werner

Chaos and regularity in the spectra of the low-lying dipole excitations of 50, 52, 54Cr

NUCLEAR STRUCTURE 50,52,54Cr; analyzed experimental B(M1) strengths for 1+ states from orbital magnetic-dipole scissors mode, and sizable spin-flip magnetic-dipole strength, and experimental B(E1) strengths for 1- states belonging to the pygmy dipole resonances (PDRs) through random matrix theory (RMT) to analyze fluctuation properties in the subspectra of the energy levels; deduced Gaussian orthogonal ensemble (GOE) for 1+ states, and nearly Poissonian behavior for the 1- states, suggesting collective behavior of the PDRs. Relevance to nuclear resonance fluorescence experiments at the Superconducting Darmstadt Electron Linear Accelerator (S-DALINAC), and the high intensity γ-ray source (HIγS) of the Triangle Universities Nuclear Laboratory (TUNL).

doi: 10.1103/PhysRevC.98.054314
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2018DO01      Phys.Lett. B 776, 133 (2018)

L.M.Donaldson, C.A.Bertulani, J.Carter, V.O.Nesterenko, P.von Neumann-Cosel, R.Neveling, V.Yu.Ponomarev, P.-G.Reinhard, I.T.Usman, P.Adsley, J.W.Brummer, E.Z.Buthelezi, G.R.J.Cooper, R.W.Fearick, S.V.Fortsch, H.Fujita, Y.Fujita, M.Jingo, W.Kleinig, C.O.Kureba, J.Kvasil, M.Latif, K.C.W.Li, J.P.Mira, F.Nemulodi, P.Papka, L.Pellegri, N.Pietralla, A.Richter, E.Sideras-Haddad, F.D.Smit, G.F.Steyn, J.A.Swartz, A.Tamii

Deformation dependence of the isovector giant dipole resonance: The neodymium isotopic chain revisited

NUCLEAR REACTIONS 144,146,148,150Nd, 152Sm(p, p'), E=200 MeV; measured reaction products, Eγ, Iγ; deduced σ, σ(θ, E), σ(θ). Comparison with DWBA calculations.

doi: 10.1016/j.physletb.2017.11.025
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0860. Data from this article have been entered in the XUNDL database. For more information, click here.


2018JI10      Eur.Phys.J. A 54, 234 (2018)

M.Jingo, E.Z.Buthelezi, J.Carter, G.R.J.Cooper, R.W.Fearick, S.V.Fortsch, C.O.Kureba, A.M.Krumbholz, P.von Neumann-Cosel, R.Neveling, P.Papka, I.Poltoratska, V.Yu.Ponomarev, A.Richter, E.Sideras-Haddad, F.D.Smit, J.A.Swartz, A.Tamii, I.T.Usman

Studies of the Giant Dipole Resonance in 27Al , 40Ca , 56Fe , 58Ni and 208Pb with high energy-resolution inelastic proton scattering under 0 degree

NUCLEAR REACTIONS 27Al, 40Ca, 56Fe, 58Ni, 208Pb(p, p'), E=200 MeV; measured Ep, Ip(θ) using two Vertical Drift Chambers and two plastic scintillators behind them; deduced σ(E, θ), IsoVector Giant Dipole Resonance (IVGDR) energy, Coulomb excitation σ vs E*, equivalent photoabsorption σ, IVGDR fine structure using Continuous Wavelet Transform (CWT) and Discrete Wavelet Transform (DWT); calculated equivalent photoabsorption σ using Quasiparticle-Phonon Model (QPM) with (1+2)-phonon and 1-phonon model spaces, power spectra from CWT analysis.

doi: 10.1140/epja/i2018-12664-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD0936.


2018PO08      Phys.Rev. C 97, 059801 (2018)

V.Yu.Ponomarev

Comment on "Spreading widths of giant resonances in spherical nuclei: Damped transient response"

doi: 10.1103/PhysRevC.97.059801
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2018SA49      Phys.Lett. B 786, 16 (2018)

D.Savran, V.Derya, S.Bagchi, J.Endres, M.N.Harakeh, J.Isaak, N.Kalantar-Nayestanaki, E.G.Lanza, B.Loher, A.Najafi, S.Pascu, S.G.Pickstone, N.Pietralla, V.Yu.Ponomarev, C.Rigollet, C.Romig, M.Spieker, A.Vitturi, A.Zilges

Multi-messenger investigation of the Pygmy Dipole Resonance in 140Ce

NUCLEAR REACTIONS 140Ce(p, p'), E=80 MeV; measured reaction products, Eγ, Iγ; deduced σ(θ), Pygmy Dipole Resonance single excitations. Comparison with the Quasi-particle Phonon Model calculations.

doi: 10.1016/j.physletb.2018.09.025
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2017BE10      Phys.Rev.Lett. 118, 212502 (2017)

T.Beck, J.Beller, N.Pietralla, M.Bhike, J.Birkhan, V.Derya, U.Gayer, A.Hennig, J.Isaak, B.Loher, V.Yu.Ponomarev, A.Richter, C.Romig, D.Savran, M.Scheck, W.Tornow, V.Werner, A.Zilges, M.Zweidinger

E2 decay strength of the M1 scissors mode of 156Gd and its first excited rotational state

NUCLEAR REACTIONS 156Gd(γ, γ'), E=3.07 MeV; measured reaction products, Eγ, Iγ; deduced relative intensities for transitions, B(M1), B(E2), multipole mixing ratio of the decay transition from the scissors mode to the 2+1 state in a deformed nucleus.

doi: 10.1103/PhysRevLett.118.212502
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017BI09      Phys.Rev.Lett. 118, 252501 (2017)

J.Birkhan, M.Miorelli, S.Bacca, S.Bassauer, C.A.Bertulani, G.Hagen, H.Matsubara, P.von Neumann-Cosel, T.Papenbrock, N.Pietralla, V.Yu.Ponomarev, A.Richter, A.Schwenk, A.Tamii

Electric Dipole Polarizability of 48Ca and Implications for the Neutron Skin

NUCLEAR REACTIONS 48Ca(p, p'), E=295 MeV; 48Ca(γ, X), E<25 MeV; measured reaction products; deduced σ, electric dipole polarizability, B(E1).

doi: 10.1103/PhysRevLett.118.252501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2558.


2017JA03      Phys.Rev. C 95, 024310 (2017)

D.H.Jakubassa-Amundsen, V.Yu.Ponomarev

Coincident excitation and radiative decay in electron-nucleus collisions

NUCLEAR REACTIONS 92Zr(e, e'γ), E=10, 75 MeV; calculated triply differential cross sections for emitted bremsstrahlung for first and second 2+ states in 92Zr.Distorted-wave Born approximation formalism with the Coulomb and the magnetic scattering fully taken into account, and transition charge and current densities taken from a random-phase approximation (RPA) calculation within the quasiparticle phonon model.

doi: 10.1103/PhysRevC.95.024310
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2017KO34      Eur.Phys.J. A 53, 175 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Astier, R.Altenkirch, S.Ansari, Th.Braunroth, M.L.Cortes, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, J.Litzinger, C.Muller-Gatermann, P.Petkov, M.Rudigier, M.Scheck, Ph.Scholz, P.Spagnoletti, M.Spieker, C.Stahl, R.Stegmann, M.Stoyanova, P.Thole, N.Warr, V.Werner, W.Witt, D.Wolk, K.O.Zell, P.Van Isacker, V.Yu.Ponomarev

A revised B(E2;2+1 → 0+1) value in the semi-magic nucleus 210Po

NUCLEAR REACTIONS 208Pb(12C, 10Be), E=62 MeV; measured Eγ, Iγ(θ), γγ-coin, (particle)γ-coin using 11 HPGe, light reaction fragments using solar cells array. 210Po; deduced 2+1 state T1/2 using the line shape of the transition, branching ratios to this state from upper states, B(E1), B(E2), B(E3), B(M1), T1/2 of three states and transitions; calculated low-lying states energy, structure, B(E1), B(E2), B(E3), B(M1) using QPM (Quasiparticle Phonon Model). Compared with data.

doi: 10.1140/epja/i2017-12367-5
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017KO38      Phys.Rev. C 96, 044305 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, R.Altenkirch, S.Ansari, A.Astier, M.Bast, M.Beckers, Th.Braunroth, M.Cappellazzo, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Goldkuhle, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, Th.Kroll, J.Litzinger, K.Moschner, C.Muller-Gatermann, P.Petkov, M.Scheck, Ph.Scholz, T.Schmidt, P.Spagnoletti, C.Stahl, R.Stegmann, A.Stolz, A.Vogt, N.Warr, V.Werner, D.Wolk, J.C.Zamora, K.O.Zell, V.Yu.Ponomarev, P.Van Isacker

Low collectivity of the 2+1 state of 212Po

NUCLEAR REACTIONS 208Pb(12C, 8Be)212Po, E=64 MeV; measured Eγ, Iγ, (particle)γ-coin, half-life of the first 2+ state by recoil-distance Doppler-shift (RDDS) method at the FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(E2). Comparisons with levels and B(E2) of 210Po and 210Pb, and with theoretical calculations using shell model. Systematics of B(E2) values for the first 2+ states in 20Ne, 44Ti, 52Ti, 136Te, 212Po, nuclei with two valence protons and two valence neutrons.

doi: 10.1103/PhysRevC.96.044305
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017MA28      Phys.Rev. C 95, 054316 (2017)

M.Mathy, J.Birkhan, H.Matsubara, P.von Neumann-Cosel, N.Pietralla, V.Yu.Ponomarev, A.Richter, A.Tamii

Search for weak M1 transitions in 48Ca with inelastic proton scattering

NUCLEAR REACTIONS 48Ca(p, p'), E=295 MeV; measured Ep, Ip, σ(θ) using Grand Raiden spectrometer at RCNP-Osaka. Multipole decomposition analysis (MDA) of experimental data. 48Ca; deduced levels, J, π, B(M1), quenching factors of GT and spin-M1 strength in fp-shell nuclei, negligible role of meson-exchange currents. Comparison with previous experimental (e, e'), and evaluated data.

doi: 10.1103/PhysRevC.95.054316
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017MA67      Phys.Rev.Lett. 119, 182503 (2017)

D.Martin, P.von Neumann-Cosel, A.Tamii, N.Aoi, S.Bassauer, C.A.Bertulani, J.Carter, L.Donaldson, H.Fujita, Y.Fujita, T.Hashimoto, K.Hatanaka, T.Ito, A.Krugmann, B.Liu, Y.Maeda, K.Miki, R.Neveling, N.Pietralla, I.Poltoratska, V.Yu.Ponomarev, A.Richter, T.Shima, T.Yamamoto, M.Zweidinger

Test of the Brink-Axel Hypothesis for the Pygmy Dipole Resonance

NUCLEAR REACTIONS 96Mo(polarized p, p'), E=295 MeV; measured reaction products, Ep, Ip; deduced σ(θ), σ(θ, E), gamma strength functions.

doi: 10.1103/PhysRevLett.119.182503
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2017SC06      Acta Phys.Pol. B48, 547 (2017)

M.Scheck, S.Mishev, V.Yu.Ponomarev, O.Agar, T.Beck, A.Blanc, R.Chapman, U.Gayer, L.P.Gaffney, E.T.Gregor, J.Keatings, P.Koseoglou, U.Koster, K.R.Mashtakov, D.O'Donnell, H.Pai, N.Pietralla, D.Savran, J.F.Smith, P.Spagnoletti, G.S.Simpson, M.Thurauf, V.Werner

β Decay as a New Probe for the Low-energy E1 Strength

RADIOACTIVITY 136I(β-); deduced discrete levels, γ transitions intensity, level population probability, branching ratios, B(E1) using published data. Compared with results from 136Xe(γ, γ').

NUCLEAR REACTIONS 136Xe(γ, γ'), E not given; deduced discrete transitions intensity, level population probability, branching ratios, B(E1) using published data.

doi: 10.5506/APhysPolB.48.547
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2016BE31      J.Phys.(London) G43, 115101 (2016)

N.Benouaret, J.Beller, H.Pai, N.Pietralla, V.Yu.Ponomarev, C.Romig, L.Schnorrenberger, M.Zweidinger, M.Scheck, J.Isaak

Dipole response of the odd-proton nucleus 205Tl up to the neutron-separation energy

NUCLEAR REACTIONS 203,205Tl(γ, γ'), E<8 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, σ(θ), resonance parameters, B(M1), B(E1). The quasiparticle phonon model calculations.

doi: 10.1088/0954-3899/43/11/115101
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2016BI05      Phys.Rev. C 93, 041302 (2016)

J.Birkhan, H.Matsubara, P.von Neumann-Cosel, N.Pietralla, V.Yu.Ponomarev, A.Richter, A.Tamii, J.Wambach

Electromagnetic M1 transition strengths from inelastic proton scattering: The cases of 48Ca and 208Pb

NUCLEAR REACTIONS 48Ca(p, p'), E=295 MeV; analyzed σ(θ) for dominating peak at 10.23 MeV ascribed to isovector spin-flip M1 (IVSM1) resonance; deduced B(M1) using a method based on isospin symmetry. Comparison with B(M1) deduced from (p, p') at 201 MeV, (p, n) at 295 MeV, (e, e') and (γ, n) data. 208Pb(p, p'), (n, n'γ), (polarized γ, γ'); analyzed B(M1) strengths in 6.5-9 MeV excitation region. Quenching phenomenon of the spin-isospin response. Method for extracting systematic information on the IVSM1 resonances in heavy nuclei.

doi: 10.1103/PhysRevC.93.041302
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2016JA02      Eur.Phys.J. A 52, 48 (2016)

D.H.Jakubassa-Amundsen, V.Yu.Ponomarev

Electric dipole excitation of 208Pb by polarized electron impact

NUCLEAR REACTIONS 208Pb(polarized e, γ), E=20-180 MeV; calculated σ, σ(θ), spin asymmetry, B(E1) strength distribution using DWBA with transition densities from RPA within QPM (Quasiparticle Phonon Model). Compared to data.

doi: 10.1140/epja/i2016-16048-7
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2016KR07      Phys.Rev.Lett. 117, 172503 (2016)

C.Kremer, S.Aslanidou, S.Bassauer, M.Hilcker, A.Krugmann, P.von Neumann-Cosel, T.Otsuka, N.Pietralla, V.Yu.Ponomarev, N.Shimizu, M.Singer, G.Steinhilber, T.Togashi, Y.Tsunoda, V.Werner, M.Zweidinger

First Measurement of Collectivity of Coexisting Shapes Based on Type II Shell Evolution: The Case of 96Zr

NUCLEAR REACTIONS 96Zr(E, E'), E=43 MeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, B(E2). Comparison with the shell-model calculations and a two-state model with and without mixing.

doi: 10.1103/PhysRevLett.117.172503
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2016LO04      Phys.Lett. B 756, 72 (2016)

B.Loher, D.Savran, T.Aumann, J.Beller, M.Bhike, N.Cooper, V.Derya, M.Duchene, J.Endres, A.Hennig, P.Humby, J.Isaak, J.H.Kelley, M.Knorzer, N.Pietralla, V.Yu.Ponomarev, C.Romig, M.Scheck, H.Scheit, J.Silva, A.P.Tonchev, W.Tornow, F.Wamers, H.Weller, V.Werner, A.Zilges

The decay pattern of the Pygmy Dipole Resonance of 140Ce

NUCLEAR REACTIONS 140Ce(γ, γ'), (γ, γ), E=6.5 MeV; measured reaction products, Eγ, Iγ; deduced elastic scattering σ, average branching ratio to excited states for 140Ce, Pygmy Dipole Resonance (PDR) couple to the ground state as well as to low-lying excited states, PDR mixing. Comparison with nuclear model calculations.

doi: 10.1016/j.physletb.2016.02.042
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2016PA04      Phys.Rev. C 93, 014318 (2016)

H.Pai, T.Beck, J.Beller, R.Beyer, M.Bhike, V.Derya, U.Gayer, J.Isaak, Krishichayan, J.Kvasil, B.Loher, V.O.Nesterenko, N.Pietralla, G.Martinez-Pinedo, L.Mertes, V.Yu.Ponomarev, P.-G.Reinhard, A.Repko, P.C.Ries, C.Romig, D.Savran, R.Schwengner, W.Tornow, V.Werner, J.Wilhelmy, A.Zilges, M.Zweidinger

Magnetic dipole excitations of 50Cr

NUCLEAR REACTIONS 50Cr(γ, γ'), (polarized γ, γ'), E<9.7 MeV bremsstrahlung; measured Eγ, Iγ, γ(θ), γ-polarization asymmetry, integrated σ, γ-branching ratios. Experiments performed at Darmstadt S-DALINAC and TUNL High Intensity γ-ray Source (HIγS) facilities. 50Cr; deduced levels, J, π, B(M1), reduced widths, configurations, M1 spin-flip transition. Discussed isovector rotation-like oscillations of 1+ states versus scissors-type mode. Comparison with Skyrme quasiparticle random-phase-approximation (QRPA) and the large-scale shell model (LSSM) calculations.

doi: 10.1103/PhysRevC.93.014318
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2016SC06      Phys.Rev.Lett. 116, 132501 (2016)

M.Scheck, S.Mishev, V.Yu.Ponomarev, R.Chapman, L.P.Gaffney, E.T.Gregor, N.Pietralla, P.Spagnoletti, D.Savran, G.S.Simpson

Investigating the Pygmy Dipole Resonance Using β Decay

NUCLEAR REACTIONS 136Xe(γ, γ'), E not given; calculated energy levels, J, π, B(E1).

RADIOACTIVITY 136I(β-); calculated energy levels, J, π, B(E1); deduced β-decay populates a fraction of 1- levels associated with the pygmy dipole resonance.

doi: 10.1103/PhysRevLett.116.132501
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2015HA21      Phys.Rev. C 92, 031305 (2015)

T.Hashimoto, A.M.Krumbholz, P.-G.Reinhard, A.Tamii, P.von Neumann-Cosel, T.Adachi, N.Aoi, C.A.Bertulani, H.Fujita, Y.Fujita, E.Ganioglu, K.Hatanaka, E.Ideguchi, C.Iwamoto, T.Kawabata, N.T.Khai, A.Krugmann, D.Martin, H.Matsubara, K.Miki, R.Neveling, H.Okamura, H.J.Ong, I.Poltoratska, V.Yu.Ponomarev, A.Richter, H.Sakaguchi, Y.Shimbara, Y.Shimizu, J.Simonis, F.D.Smit, G.Susoy, T.Suzuki, J.H.Thies, M.Yosoi, J.Zenihiro

Dipole polarizability of 120Sn and nuclear energy density functionals

NUCLEAR REACTIONS 120Sn(polarized p, p'), E=295 MeV; measured scattered proton spectra, p(θ) using Grand Raiden spectrometer at RCNP-Osaka; analyzed polarization transfer observables; deduced ISGQR excitation, B(E1), precise electric dipole polarizability αD, nuclear symmetry energy and its density dependence. Comparison with other experimental data. Comparison with model calculations based on Skyrme interactions and on relativistic Hamiltonians.

doi: 10.1103/PhysRevC.92.031305
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2015KR05      Phys.Lett. B 744, 7 (2015)

A.M.Krumbholz, P.von Neumann-Cosel, T.Hashimoto, A.Tamii, T.Adachi, C.A.Bertulani, H.Fujita, Y.Fujita, E.Ganioglu, K.Hatanaka, C.Iwamoto, T.Kawabata, N.T.Khai, A.Krugmann, D.Martin, H.Matsubara, R.Neveling, H.Okamura, H.J.Ong, I.Poltoratska, V.Yu.Ponomarev, A.Richter, H.Sakaguchi, Y.Shimbara, Y.Shimizu, J.Simonis, F.D.Smit, G.Susoy, J.H.Thies, T.Suzuki, M.Yosoi, J.Zenihiro

Low-energy electric dipole response in 120Sn

NUCLEAR REACTIONS 120Sn(p, p'), E=295 MeV; measured reaction products, Ep, Ip; deduced σ, σ(θ, E), B(E1). Comparison with available data.

doi: 10.1016/j.physletb.2015.03.023
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2015WA29      Nature(London) 526, 406 (2015)

C.Walz, H.Scheit, N.Pietralla, T.Aumann, R.Lefol, V.Yu.Ponomarev

Observation of the competitive double-gamma nuclear decay

RADIOACTIVITY 137Cs(β-), 137Ba(IT); measured decay products, Eγ, Iγ; deduced γγ-ray branching ratio, multipolarities of the γ-radiation. Comparison with available data.

doi: 10.1038/nature15543
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2014BE09      Acta Phys.Pol. B45, 193 (2014)

N.Benouaret, J.Beller, J.Isaak, J.H.Kelley, H.Pai, N.Pietralla, V.Yu.Ponomarev, R.Raut, C.Romig, G.Rusev, D.Savran, M.Scheck, L.Schnorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger

Photoexcitation of the Stable Tl Isotopes Below the Neutron Separation Energy

NUCLEAR REACTIONS 203,205Tl(γ, γ'), E<7.5 MeV; measured reaction products, Eγ, Iγ; deduced dipole strength distribution. Comparison with available data.

doi: 10.5506/APhysPolB.45.193
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2014DE04      Phys.Lett. B 730, 288 (2014)

V.Derya, D.Savran, J.Endres, M.N.Harakeh, H.Hergert, J.H.Kelley, P.Papakonstantinou, N.Pietralla, V.Yu.Ponomarev, R.Roth, G.Rusev, A.P.Tonchev, W.Tornow, H.J.Wortche, A.Zilges

Isospin properties of electric dipole excitations in 48Ca

NUCLEAR REACTIONS 48Ca(polarized γ, γ'), E=6.6-9.51 MeV; 40,48Ca, 16O(α, α'γ), E=136 MeV; measured reaction products, Eγ, Iγ; deduced B(E1), J, π. Comparison with RPA calculations, available data.

doi: 10.1016/j.physletb.2014.01.050
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2014DZ01      Phys.Rev. C 89, 035805 (2014)

A.A.Dzhioev, A.I.Vdovin, J.Wambach, V.Yu.Ponomarev

Inelastic neutrino scattering off hot nuclei in supernova environments

NUCLEAR REACTIONS 56Fe, 82Ge(ν, ν'), E<60 MeV; calculated finite temperature σ(E) accounting for allowed and forbidden transitions by thermal QRPA, temperature evolution of Gamow-Teller (GT) strengths. Comparison with hybrid large-scale shell-model and RPA calculations.

doi: 10.1103/PhysRevC.89.035805
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2014PA10      Phys.Rev. C 89, 034306 (2014), Erratum Phys.Rev. C 91, 029903 (2015)

P.Papakonstantinou, H.Hergert, V.Yu.Ponomarev, R.Roth

Low-energy electric dipole response of Sn isotopes

NUCLEAR REACTIONS 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136,138,140Sn(γ, xn), E<50 MeV; calculated point-proton and neutron root rms radii, fraction of Thomas-Reiche-Kuhn (TRK) sum rule, photoabsorption σ(E), isoscalar low-energy states, resonances and dipole strengths, B(E1), summed E1 strength, longitudinal electroexcitation form factor for 116Sn. Self-consistent quasi-particle random-phase approximation (QRPA) and Gogny D1S force. Phenomenological Realistic two-body interaction supplemented by a three-body contact term. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.034306
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2014PO03      Phys.Rev. C 89, 054322 (2014)

I.Poltoratska, R.W.Fearick, A.M.Krumbholz, E.Litvinova, H.Matsubara, P.von Neumann-Cosel, V.Yu.Ponomarev, A.Richter, A.Tamii

Fine structure of the isovector giant dipole resonance in 208Pb: Characteristic scales and level densities

NUCLEAR REACTIONS 208Pb(p, p'), E=295 MeV; analyzed experimental data obtained using Grand-Raiden spectrometer at RCNP facility, double-differential σ(θ), continuous and discrete wavelet transform (CWT, DWT) analysis of excitation energy spectrum, extraction of scales for the observed fine structure in isovector-giant dipole resonance (IVGDR), level density of 1- states in IVGDR region, GDR width, B(E1) strength. Comparison with theoretical predictions.

doi: 10.1103/PhysRevC.89.054322
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2014SC04      Phys.Rev. C 89, 037301 (2014)

A.Scheikh-Obeid, S.Aslanidou, J.Birkhan, A.Krugmann, P.von Neumann-Cosel, N.Pietralla, I.Poltoratska, V.Yu.Ponomarev

B(E2) strength ratio of one-phonon 2+ states of 94Zr from electron scattering at low momentum transfer

NUCLEAR REACTIONS 94Zr(e, e'), E=71 MeV; measured electron spectra at four angles at S-DALINAC facility; deduced levels, B(E2) for second 2+ state. PWBA analysis. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.89.037301
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2013PA38      Phys.Rev. C 88, 054316 (2013)

H.Pai, J.Beller, N.Benouaret, J.Enders, T.Hartmann, O.Karg, P.von Neumann-Cosel, N.Pietralla, V.Yu.Ponomarev, C.Romig, M.Scheck, L.Schnorrenberger, S.Volz, M.Zweidinger

Low-lying dipole strength in the N=28 shell-closure nucleus 52Cr

NUCLEAR REACTIONS 52Cr(γ, γ'), E<9.9 MeV; measured Eγ, Iγ, γ(θ), integrated cross sections using bremsstrahlung beam at the superconducting Darmstadt linear electron accelerator S-DALINAC. 52Cr; deduced levels, PDR, J, π, Γ0, B(E1), B(M1), reduced transition widths. Comparison with microscopic QPM calculations.

doi: 10.1103/PhysRevC.88.054316
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2013RO28      Phys.Rev. C 88, 044331 (2013)

C.Romig, J.Beller, J.Glorius, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, V.Yu.Ponomarev, A.Sauerwein, D.Savran, M.Scheck, L.Schnorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, A.Zilges, M.Zweidinger

Low-lying dipole strength of the open-shell nucleus 94Mo

NUCLEAR REACTIONS 94Mo(γ, γ'), (polarized γ, γ'), E=5.47, 6.05, 6.44, 6.61, 6.89, 7.65, 8.70 MeV; measured Eγ, Iγ, γγ(θ), γ-polarization asymmetry using DHIPS setup at S-DALINAC, and HiγS at TUNL and DFELL facilities. 94Mo; deduced levels, J, π, Γ20/Γ, branching ratios, B(E1), B(M1), E1 strength distributions, feeding of first 2+ level, elastic σ. Comparison with QPM calculations, and statistical model using DICEBOX computer code.

doi: 10.1103/PhysRevC.88.044331
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2013SC01      Phys.Rev. C 87, 014337 (2013)

A.Scheikh-Obeid, O.Burda, M.Chernykh, A.Krugmann, P.von Neumann-Cosel, N.Pietralla, I.Poltoratska, V.Yu.Ponomarev, C.Walz

E2 strengths and transition radii difference of one-phonon 2+ states of 92Zr from electron scattering at low momentum transfer

NUCLEAR REACTIONS 92Zr(e, e'), E=63 MeV; measured E(e), I(e), σ(θ) using LINTOTT spectrometer at S-DALINAC accelerator facility. 92Zr; deduced levels, J, π, B(E2) and B(E3) for first two 2+ and first 3- states, one-phonon symmetric and mixed-symmetric 2+ states. DWBA and PWBA analyses. Comparison with quasiparticle-phonon model (QPM) calculations.

doi: 10.1103/PhysRevC.87.014337
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2013SC08      Phys.Rev. C 87, 051304 (2013)

M.Scheck, V.Yu.Ponomarev, T.Aumann, J.Beller, M.Fritzsche, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, D.Savran, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger

Decay pattern of the pygmy dipole resonance in 60Ni

NUCLEAR REACTIONS 60Ni(polarized γ, γ'), E=7.65-9.66 MeV; measured Eγ, Iγ, M1 and E1 strengths at HIγS-TUNL facility. 60Ni; deduced levels, J, π, PDR, branching ratios, number of 1+ and 1- states. Comparison with quasiparticle phonon model (QPM) calculations.

doi: 10.1103/PhysRevC.87.051304
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2013SC20      Phys.Rev. C 88, 044304 (2013)

M.Scheck, V.Yu.Ponomarev, M.Fritzsche, J.Joubert, T.Aumann, J.Beller, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, D.Savran, L.Schorrenberger, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, A.Zilges, M.Zweidinger

Photoresponse of 60Ni below 10-MeV excitation energy: Evolution of dipole resonances in fp-shell nuclei near N=Z

NUCLEAR REACTIONS 60Ni(γ, γ'), (polarized γ, γ'), E<10 MeV; 58Ni(polarized γ, γ'), E<10 MeV; measured Eγ, Iγ, γγ(θ), γ-ray polarization, integrated σ, γ-branching ratios using High-intensity photon setup at S-DALINAC facility. 58,60Ni; deduced levels, J, π, width, level half-lives, B(E1), B(M1), B(E2), E1 and M1 strength distributions. Thomas-Reiche-Kuhn sum rule. Pygmy-dipole resonances. Comparison with QPM calculations.

doi: 10.1103/PhysRevC.88.044304
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2012DA18      J.Phys.:Conf.Ser. 366, 012008 (2012)

M.Danchev, G.Rainovski, N.Pietralla, A.Gargano, A.Covello, C.Baktash, J.R.Beene, C.R.Bingham, A.Galindo-Uribarri, K.A.Gladnishki, C.J.Gross, V.Yu.Ponomarev, D.C.Radford, L.L.Riedinger, M.Scheck, A.E.Stuchbery, J.Wambach, C.-H.Yu, N.V.Zamfir

One-phonon isovector 2+1, MS state in the neutron rich nucleus 132Te

NUCLEAR REACTIONS 12C(132Te, 132Te'), E=3 MeV/nucleon; measured thick target Coulomb excitation Eγ, Iγ, γγ-coin using CLARION array, 12C ions using HyBall, (12C)γ-coin; deduced Doppler corrected γ ray spectrum, σ to discrete states, B(E2), B(M1), μ for discrete transitions; calculated B(E2), B(M1), μ using shell model and one-phonon MSS (Mixed-Symmetry State); deduced 2+2 as one-phonon MSS.

doi: 10.1088/1742-6596/366/1/012008
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2012EN02      Phys.Rev. C 85, 064331 (2012)

J.Endres, D.Savran, P.A.Butler, M.N.Harakeh, S.Harissopulos, R.-D.Herzberg, R.Krucken, A.Lagoyannis, E.Litvinova, N.Pietralla, V.Yu.Ponomarev, L.Popescu, P.Ring, M.Scheck, F.Schluter, K.Sonnabend, V.I.Stoica, H.J.Wortche, A.Zilges

Structure of the pygmy dipole resonance in 124Sn

NUCLEAR REACTIONS 124Sn(α, α'), E=136 MeV; measured Eγ, Eα, αγ-coin, αγ(θ) using Big-Bite magnetic Spectrometer at KVI facility; deduced pygmy dipole resonances, levels, differential σ. Comparison with B(E1) strengths in (γ, γ'). Comparison with quasiparticle-phonon model calculations and relativistic quasiparticle random-phase approximations.

doi: 10.1103/PhysRevC.85.064331
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2012PA05      Phys.Lett. B 709, 270 (2012)

P.Papakonstantinou, H.Hergert, V.Yu.Ponomarev, R.Roth

Low-energy dipole strength and the critical case of 48Ca

NUCLEAR STRUCTURE 36,40,44,48,52Ca; calculated isoscalar dipole, E1 and electric dipole strengths. QRPA calculations.

doi: 10.1016/j.physletb.2012.02.024
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2012PI18      J.Phys.:Conf.Ser. 366, 012037 (2012)

N.Pietralla, C.Walz, V.Y.Ponomarev, H.Fujita, A.Krugmann, P.von Neumann-Cosel, A.Scheikh-Obeid, J.Wambach

Direct Evidence for Proton-Neutron Out-of-Phase Coupling in Mixed-Symmetry States from Scattering Experiments on 92Zr

NUCLEAR REACTIONS 92Zr(p, p'), E=800 MeV;92Zr(e, e'), E=63 MeV; measured reaction products; deduced σ(q) vs momentum transfer; calculated σ(q) vs momentum transfer using QPM; deduced formation of low-lying quadrupole collective structures.

doi: 10.1088/1742-6596/366/1/012037
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2012PO07      Phys.Rev. C 85, 041304 (2012)

I.Poltoratska, P.von Neumann-Cosel, A.Tamii, T.Adachi, C.A.Bertulani, J.Carter, M.Dozono, H.Fujita, K.Fujita, Y.Fujita, K.Hatanaka, M.Itoh, T.Kawabata, Y.Kalmykov, A.M.Krumbholz, E.Litvinova, H.Matsubara, K.Nakanishi, R.Neveling, H.Okamura, H.J.Ong, B.Ozel-Tashenov, V.Yu.Ponomarev, A.Richter, B.Rubio, H.Sakaguchi, Y.Sakemi, Y.Sasamoto, Y.Shimbara, Y.Shimizu, F.D.Smit, T.Suzuki, Y.Tameshige, J.Wambach, M.Yosoi, J.Zenihiro

Pygmy dipole resonance in 208Pb

NUCLEAR REACTIONS 208Pb(p, p'), E=295 MeV; measured Ep, Ip, σ(θ). 208Pb; deduced levels, J, π, PDR, σ(E1), σ(M1), B(E1). Multipole decomposition analysis based on DWBA calculations. Comparison with quasiparticle-phonon model (QPM), relativistic time-blocking approximation (RTBA), and shell model calculations. Separation of PDR and GDR strength with Coulomb-nuclear interference.

doi: 10.1103/PhysRevC.85.041304
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2012RA32      J.Phys.:Conf.Ser. 381, 012047 (2012)

G.Rainovski, M.Danchev, N.Pietralla, A.Gargano, A.Covello, C.Baktash, J.R.Beene, C.R.Bingham, A.Galindo-Uribarri, K.A.Gladnishki, C.J.Gross, V.Yu.Ponomarev, D.C.Radford, L.L.Riedinger, M.Scheck, A.E.Stuchbery, J.Wambach, C.-H.Yu, N.V.Zamfir

On the origin of low-lying M1 strength in even-even nuclei

NUCLEAR REACTIONS 12C(132Te, 132Te'), E=3 MeV/nucleon; measured thick target Coulomb excitation Eγ, Iγ using CLARION array, scattered ions using HyBall array; deduced B(E2), B(M1); calculated 132Te low-lying levels, J, π.

doi: 10.1088/1742-6596/381/1/012047
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2012ZW01      J.Phys.:Conf.Ser. 366, 012054 (2012)

M.Zweidinger, J.Beller, J.Isaak, N.Pietralla, V.Yu.Ponomarev, C.Romig, D.Savran, M.Scheck, K.Sonnabend

Photon scattering off 94Zr and 96Zr

NUCLEAR REACTIONS 94,96Zr(γ, γ'), E=0-10 MeV; calculated dipole excitation strength B(E1), B(M1) energy distribution; calculated B(E1), B(M1) using QPM. Compared with data. Analysis still in progress.

doi: 10.1088/1742-6596/366/1/012054
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2011DA21      Phys.Rev. C 84, 061306 (2011)

M.Danchev, G.Rainovski, N.Pietralla, A.Gargano, A.Covello, C.Baktash, J.R.Beene, C.R.Bingham, A.Galindo-Uribarri, K.A.Gladnishki, C.J.Gross, V.Yu.Ponomarev, D.C.Radford, L.L.Riedinger, M.Scheck, A.E.Stuchbery, J.Wambach, C.-H.Yu, N.V.Zamfir

One-phonon isovector 2+1, MS state in the neutron-rich nucleus 132Te

NUCLEAR REACTIONS 12C(132Te, 132Te'), E=3 MeV/nucleon; measured Eγ, Iγ, (12C recoils)γ-coin using CLARION array and HyBall. 132Te; deduced levels, one-phonon mixed-symmetry state (MSS) B(E2), B(M1) values for first 2+ states. Coulomb excitation. Comparison with previous measurements and shell-model calculations. 132,134,136Te; reanalyzed B(E2) values for first 2+ states from an earlier experiment in 2002.

NUCLEAR MOMENTS 132Te; reanalyzed g factor from an earlier experiment in 2005.

NUCLEAR STRUCTURE 132Te; calculated levels, J, π, B(E2) using shell model. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.061306
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2011HE24      J.Phys.:Conf.Ser. 312, 092029 (2011)

A.M.Heilmann, P.von Neumann-Cosel, A.Tamil, T.Adachi, C.Bertulani, J.Carter, H.Fujuita, Y.Fujita, K.Hatanaka, K.Hirota, On.H.Jin, T.Kawabata, A.Krugmann, H.Matsubara, E.Litvinova, R.Neveling, H.Okamura, B.Ozel-Tashenov, I.Poltoratska, V.Yu.Ponomarev, A.Richter, H.Sakaguchi, Y.Sakemi, Y.Sasamoto, Y.Shimizu, Y.Shimbara, F.D.Smit, T.Suzuki, Y.Tameshige, Y.Yasuda, M.Yosoi, J.Zenihiro

Electric dipole response in 120Sn

NUCLEAR REACTIONS 120Sn(polarized p, p'), E=295 MeV; measured Ep, Ip(θ=forward), proton polarization using high-resolution Grand Raiden magnetic spectrometer; deduced B(E1) strength distribution. Data of published DALINAC-S experiment with (γ, γ') used to extract B(E1) strengths.

doi: 10.1088/1742-6596/312/9/092029
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2011PA12      Eur.Phys.J. A 47, 14 (2011)

P.Papakonstantinou, V.Yu.Ponomarev, R.Roth, J.Wambach

Isoscalar dipole coherence at low energies and forbidden E1 strength

NUCLEAR STRUCTURE 16O, 40Ca, 56Ni, 100Sn; calculated ISD, E1 response, GDR peak energy, B(E1), γ transition strengths, transition densities using RPA with finite-range forces.

doi: 10.1140/epja/i2011-11014-7
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2011SA38      Phys.Rev. C 84, 024326 (2011)

D.Savran, M.Elvers, J.Endres, M.Fritzsche, B.Loher, N.Pietralla, V.Yu.Ponomarev, C.Romig, L.Schnorrenberger, K.Sonnabend, A.Zilges

Fragmentation and systematics of the pygmy dipole resonance in the stable N=82 isotones

NUCLEAR REACTIONS 136Xe(γ, γ'), E=8.0, 9.2 MeV; measured Eγ, Iγ, γ(θ) at DHIPS facility. 136Xe; deduced levels, J, π, partial decay widths, B(E1). Comparison with Quasiparticle phonon model calculations. Systematics of measured and calculated B(E1) strengths for pygmy dipole resonances (PDR) in N=82 isotones 136Xe, 138Ba, 140Ce, 142Nd, and 144Sm. Discussed fragmentation of E1 strength.

doi: 10.1103/PhysRevC.84.024326
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2011TA18      Phys.Rev.Lett. 107, 062502 (2011)

A.Tamii, I.Poltoratska, P.von Neumann-Cosel, Y.Fujita, T.Adachi, C.A.Bertulani, J.Carter, M.Dozono, H.Fujita, K.Fujita, K.Hatanaka, D.Ishikawa, M.Itoh, T.Kawabata, Y.Kalmykov, A.M.Krumbholz, E.Litvinova, H.Matsubara, K.Nakanishi, R.Neveling, H.Okamura, H.J.Ong, B.Ozel-Tashenov, B.Rubio, H.Sakaguchi, Y.Sakemi, Y.Sasamoto, Y.Shimbara, Y.Shimizu, V.Yu.Ponomarev, A.Richter, F.D.Smit, T.Suzuki, Y.Tameshige, J.Wambach, R.Yamada, M.Yosoi, J.Zenihiro

Complete Electric Dipole Response and the Neutron Skin in 208Pb

NUCLEAR REACTIONS 208Pb(p, p'), E<20 MeV; measured reaction products, proton spectra; deduced electric dipole (E1) and spin magnetic dipole (M1) modes, E1 strength distribution, neutron skin thickness. Comparison with experimental data.

doi: 10.1103/PhysRevLett.107.062502
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2011TO04      Phys.Rev. C 83, 044326 (2011)

I.Tomandl, J.Honzatko, T.von Egidy, H.-F.Wirth, T.Faestermann, V.Yu.Ponomarev, S.Pasic, R.Hertenberger, Y.Eisermann, G.Graw

Nuclear structure study of semi-magic 125Sn via (n, γ) and (d, p) reactions

NUCLEAR REACTIONS 124Sn(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin. 125Sn; deduced levels, J, π, S(n). 124Sn(polarized d, p), E=22 MeV; measured E(p), I(p), cross sections, σ(θ), analyzing powers. 125Sn; deduced levels, J, π, L-transfer, spectroscopic factors. DWBA and CCBA analyses. Comparison with quasiparticle-phonon model. Systematics of 11/2- isomer with those in odd-A Te isotopes of A=123-131.

doi: 10.1103/PhysRevC.83.044326
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2011WA01      Phys.Rev.Lett. 106, 062501 (2011)

C.Walz, H.Fujita, A.Krugmann, P.von Neumann-Cosel, N.Pietralla, V.Yu.Ponomarev, A.Scheikh-Obeid, J.Wambach

Origin of Low-Energy Quadrupole Collectivity in Vibrational Nuclei

NUCLEAR STRUCTURE 92Zr; calculated B(E2), B(M1), magnetic moments, momentum transfer, σ(θ); deduced formation of the collective symmetric and mixed-symmetric states.. Comparison with experimental data.

doi: 10.1103/PhysRevLett.106.062501
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2010DZ02      Phys.Rev. C 81, 015804 (2010)

A.A.Dzhioev, A.I.Vdovin, V.Yu.Ponomarev, J.Wambach, K.Langanke, G.Martinez-Pinedo

Gamow-Teller strength distributions at finite temperatures and electron capture in stellar environments

NUCLEAR STRUCTURE 54,56Fe, 76,78,80Ge; calculated Gammow-Teller strength distributions, electron capture rates, strength distributions for first forbidden transitions, and occupation numbers in hot nuclei in stellar environments using thermal quasiparticle random-phase approximation (TQRPA) model. Comparison with experimental data and large-scale shell-model (LSSM) calculations.

doi: 10.1103/PhysRevC.81.015804
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2010EN01      Phys.Rev.Lett. 105, 212503 (2010)

J.Endres, E.Litvinova, D.Savran, P.A.Butler, M.N.Harakeh, S.Harissopulos, R.-D.Herzberg, R.Krucken, A.Lagoyannis, N.Pietralla, V.Yu.Ponomarev, L.Popescu, P.Ring, M.Scheck, K.Sonnabend, V.I.Stoica, H.J.Wortche, A.Zilges

Isospin Character of the Pygmy Dipole Resonance in 124Sn

NUCLEAR REACTIONS 124Sn(α, α'), E=136 MeV; measured Eα, Iα, Eγ, Iγ, α-γ-coin.; deduced pigmy resonance σ(θ), B(E1), two groups of states. Comparison with calculations.

doi: 10.1103/PhysRevLett.105.212503
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2009DZ01      Bull.Rus.Acad.Sci.Phys. 73, 225 (2009); Izv.Akad.Nauk RAS, Ser.Fiz. 73, 236 (2009)

A.A.Dzhioev, A.I.Vdovin, V.Yu.Ponomarev, J.Wambach

Thermal effects on electron capture for neutron-rich nuclei

RADIOACTIVITY 76Ge(EC); calculated electron capture cross sections as a function of electron energy.

doi: 10.3103/S106287380902021X
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2009DZ03      Phys.Atomic Nuclei 72, 1320 (2009); Yad.Fiz. 72, 1373 (2009)

A.A.Dzhioev, A.I.Vdovin, V.Yu.Ponomarev, J.Wambach

Charge-exchange transitions in hot nuclei

NUCLEAR STRUCTURE 80Ge; calculated single-particle wave functions and energies, strength distribution S(E) of allowed pn transitions.

doi: 10.1134/S1063778809080079
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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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2009PO06      Nucl.Phys. A824, 24 (2009)

V.Yu.Ponomarev, A.I.Vdovin

Test of a modified BCS theory performance in the Picket Fence Model

NUCLEAR STRUCTURE 120Sn; calculated pairing gap, Fermi level energy and quasiparticle properties vs temperature using a modified BCS theory.

doi: 10.1016/j.nuclphysa.2009.03.001
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2009SH19      Phys.Rev. C 79, 044305 (2009)

A.Shevchenko, O.Burda, J.Carter, G.R.J.Cooper, R.W.Fearick, S.V.Fortsch, H.Fujita, Y.Fujita, Y.Kalmykov, D.Lacroix, J.J.Lawrie, P.von Neumann-Cosel, R.Neveling, V.Yu.Ponomarev, A.Richter, E.Sideras-Haddad, F.D.Smit, J.Wambach

Global investigation of the fine structure of the isoscalar giant quadrupole resonance

NUCLEAR REACTIONS 58Ni, 89Y, 90Zr, 120Sn, 142Nd, 166Er, 208Pb(p, p'), E=200 MeV; measured proton spectra, angular distributions; deduced isoscalar giant quadrupole resonance (ISGQR) and associated E2 strength functions. Wavelet analysis. Comparisons with quasiparticle-phonon model (QPM), extended time-dependent Hartree-Fock method (ETDHF), random-phase approximation (RPA) and extended theory of finite Fermi systems (ETFFS).

doi: 10.1103/PhysRevC.79.044305
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2009SH49      Vis.Khar.Nat.Univ. 868 n.3(43) p.35 (2009)

O.S.Shevchenko, Yu.M.Ranyuk, A.M.Dovbnya, E.L.Kuplennikov, V.Yu.Ponomarev

Photoexcitation of the 117mSn by (γ, γ') reaction at Eγ < MeV

NUCLEAR REACTIONS 117Sn(γ, γ'), E=2.1-3 MeV; measured Eγ, Iγ; deduced isomer yields; calculated yields using quasiparticle-phonon model.


2009VE07      Phys.Rev. C 80, 031302 (2009)

P.Vesely, J.Kvasil, V.O.Nesterenko, W.Kleinig, P.-G.Reinhard, V.Yu.Ponomarev

Skyrme random-phase-approximation description of spin-flip M1 giant resonance

NUCLEAR STRUCTURE 48Ca, 158Gd, 208Pb, 238U; calculated spin-flip M1 giant resonance energies and strength distributions using random-phase approximation (RPA) calculations and Skyrme energy functionals with a set of eight Skyrme parametrizations. Comparison with experimental data.

doi: 10.1103/PhysRevC.80.031302
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2008DZ02      Bull.Rus.Acad.Sci.Phys. 72, 269 (2008); Izv.Akad.Nauk RAS, Ser.Fiz. 72, 294 (2008)

A.A.Dzhioev, A.I.Vdovin, V.Yu.Ponomarev, J.Wambach

Gamow-Teller resonance in hot nuclei and astrophysical applications

NUCLEAR STRUCTURE 56Fe; calculated EC and β- decay rates at stellar temperatures.

doi: 10.3103/S1062873808030015
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2008SA19      Phys.Rev.Lett. 100, 232501 (2008)

D.Savran, M.Fritzsche, J.Hasper, K.Lindenberg, S.Muller, V.Yu.Ponomarev, K.Sonnabend, A.Zilges

Fine Structure of the Pygmy Dipole Resonance in 136Xe

NUCLEAR REACTIONS 136Xe(γ, γ'), E not given; measured Eγ, Iγ, B(E1). Comparison with quasiparticle phonon model.

doi: 10.1103/PhysRevLett.100.232501
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2008SH07      Phys.Rev. C 77, 024302 (2008)

A.Shevchenko, J.Carter, G.R.J.Cooper, R.W.Fearick, Y.Kalmykov, P.von Neumann-Cosel, V.Yu.Ponomarev, A.Richter, I.Usman, J.Wambach

Analysis of fine structure in the nuclear continuum

NUCLEAR REACTIONS 208Pb(p, p'), E=200 MeV; analyzed excitation energies to investigate fine structure.

doi: 10.1103/PhysRevC.77.024302
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2007BU23      Phys.Rev.Lett. 99, 092503 (2007)

O.Burda, N.Botha, J.Carter, R.W.Fearick, S.V.Fortsch, C.Fransen, H.Fujita, J.D.Holt, M.Kuhar, A.Lenhardt, P.von Neumann-Cosel, R.Neveling, N.Pietralla, V.Yu.Ponomarev, A.Richter, O.Scholten, E.Sideras-Haddad, F.D.Smit, J.Wambach

High-Energy-Resolution Inelastic Electron and Proton Scattering and the multiphonon Nature of Mixed-Symmetry 2+ States in 94Mo

NUCLEAR REACTIONS 94Mo(e, e'), E=70 MeV; 94Mo(p, p'), E=200 MeV; measured σ and excitation strengths. Compared results to model calculations.

doi: 10.1103/PhysRevLett.99.092503
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2007EN02      Eur.Phys.J. A 31, 15 (2007)

J.Enders, O.Karg, P.von Neumann-Cosel, V.Yu.Ponomarev

Do we understand the electric quadrupole strength distributions in magic nuclei?

NUCLEAR REACTIONS 52Cr(γ, γ'), E=8.0, 9.9 MeV bremsstrahlung; measured Eγ, Iγ. 52Cr deduced 2+ states energies, B(E2).

NUCLEAR STRUCTURE 16O, 40,44,48Ca, 52Cr, 88Sr, 116,124Sn, 138Ba, 140Ce, 206,208Pb; analyzed electric quadrupole strength distributions.

doi: 10.1140/epja/i2006-10150-5
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2007FU12      Nucl.Phys. A788, 94c (2007)

H.Fujita, N.T.Botha, O.Burda, J.Carter, R.W.Fearick, S.V.Fortsch, C.Fransen, M.Kuhar, A.Lenhardt, P.von Neumann-Cosel, R.Neveling, N.Pietralla, V.Yu.Ponomarev, A.Richter, O.Scholten, E.Sideras-Haddad, F.D.Smit, J.Wambach

One- and two-phonon mixed-symmetry states in 94Mo in high-resolution electron and proton scattering

NUCLEAR REACTIONS 94Mo(e, e'), E=70 MeV; 94Mo(p, p')E=200 MeV; measured excitation energy spectra; deduced mixed-symmetry state features. Comparison with shell model, quasiparticle phonon model and interacting boson model.

doi: 10.1016/j.nuclphysa.2007.01.053
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2007GU30      J.Phys.(London) G34, 2665 (2007)

P.Guazzoni, L.Zetta, V.Yu.Ponomarev, G.Graw, R.Hertenberger, T.Faestermann, H.-F.Wirth, M.Jaskola

High-resolution investigation of the 121Sb(p, t)119Sb reaction and quasiparticle-phonon model description

NUCLEAR REACTIONS 121Sb(p, t), E=21 MeV; measured triton spectra, σ(θ). 119Sb; deduced level energies, J, π. DWBA analysis.

doi: 10.1088/0954-3899/34/12/011
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2007HO13      Phys.Rev. C 76, 014314 (2007)

F.Hofmann, C.Baumer, A.M.van den Berg, D.Frekers, V.M.Hannen, M.N.Harakeh, M.de Huu, Y.Kalmykov, P.von Neumann-Cosel, V.Yu.Ponomarev, S.Rakers, B.Reitz, A.Richter, K.Schweda, A.Shevchenko, J.Wambach, H.J.Wortche

Proton scattering at intermediate energies on 58Ni: How well is it understood?

NUCLEAR REACTIONS 58Ni(p, p'), E=172 MeV; measured cross sections, spin flip cross sections and spin-flip probabilities. Compared results to model calculations.

doi: 10.1103/PhysRevC.76.014314
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2007KA46      Nucl.Phys. A788, 136c (2007)

Y.Kalmykov, K.Langanke, G.Martinez-Pinedo, D.Mocelj, P.von Neumann-Cosel, I.Poltoratska, V.Yu.Ponomarev, A.Richter, A.Shevchenko, J.Wambach

Spin- and Parity-Resolved Level Densities from High-Resolution Hadron and Electron Scattering Studies of Giant Resonances

NUCLEAR REACTIONS 90Zr(3He, t), E=140 MeV/nucleon; 90Zr(e, e'), E=42.5, 66.4, 82.3 MeV; 90Zr(p, p'), E=200 MeV; analyzed excitation energy spectra. 90Zr, 90Nb deduced Gamow-Teller resonance and GQR energies and level densities. 58Ni(3He, t), (e, e'), (p, p'), E not given; analyzed excitation energy spectra. 58Ni, 58Cu deduced level densities. Discrete wavelet transform and fluctuation analysis, back-shifted Fermi gas and Hartree-Fock-BCS models.

doi: 10.1016/j.nuclphysa.2007.01.059
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2006KA02      Phys.Rev.Lett. 96, 012502 (2006)

Y.Kalmykov, T.Adachi, G.P.A.Berg, H.Fujita, K.Fujita, Y.Fujita, K.Hatanaka, J.Kamiya, K.Nakanishi, P.von Neumann-Cosel, V.Yu.Ponomarev, A.Richter, N.Sakamoto, Y.Sakemi, A.Shevchenko, Y.Shimbara, Y.Shimizu, F.D.Smit, T.Wakasa, J.Wambach, M.Yosoi

Fine Structure of the Gamow-Teller Resonance in 90Nb and Level Density of 1+ States

NUCLEAR REACTIONS 90Zr(3He, t), E=140 MeV/nucleon; measured triton spectra. 90Nb deduced level densities, fine structure of Gamow-Teller resonance. Wavelet analysis technique.

doi: 10.1103/PhysRevLett.96.012502
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2006PY01      Phys.Rev. C 73, 017302 (2006)

I.Pysmenetska, S.Walter, J.Enders, H.von Garrel, O.Karg, U.Kneissl, C.Kohstall, P.von Neumann-Cosel, H.H.Pitz, V.Yu.Ponomarev, M.Scheck, F.Stedile, S.Volz

Two-phonon 1- state in 112Sn observed in resonant photon scattering

NUCLEAR REACTIONS 112Sn(γ, γ'), E=3.8 MeV bremsstrahlung; measured Eγ, Iγ. 112Sn deduced level J, π, width, configuration, excitation B(E1).

NUCLEAR STRUCTURE 112,116,118,120,122,124Sn; analyzed level energies, transitions B(E1). Quasiparticle-phonon model.

doi: 10.1103/PhysRevC.73.017302
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2005BU20      Nucl.Phys. A756, 54 (2005)

D.Bucurescu, Y.Eisermann, G.Graw, R.Hertenberger, H.-F.Wirth, V.Yu.Ponomarev

Detailed spectroscopy of 113Cd through transfer reactions

NUCLEAR REACTIONS 112Cd(polarized d, p), E=22 MeV; 114Cd(polarized d, t), E=25 MeV; measured particle spectra, σ(θ), Ay(θ). 113Cd deduced levels, J, π, spectroscopic factors, configurations. Interacting Boson Fermion model and Quadrupole Phonon model calculations.

doi: 10.1016/j.nuclphysa.2005.03.012
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2005EN04      Acta Phys.Pol. B36, 1077 (2005)

J.Enders, M.Babilon, T.Hartmann, A.Heine, P.von Neumann-Cosel, V.Yu.Ponomarev, N.Ryezayeva, S.Volz, A.Zilges, T.Guhr

Electric dipole strength below the giant dipole resonance

NUCLEAR STRUCTURE 138Ba, 140Ce, 142Nd, 144Sm, 204,206,208Pb; analyzed electric dipole strength distributions. Nuclear resonance fluorescence, Coulomb excitation, quasiparticle-phonon model.


2005HO10      Phys.Lett. B 612, 165 (2005)

F.Hofmann, C.Baumer, A.M.van den Berg, D.Frekers, V.M.Hannen, M.N.Harakeh, M.A.de Huu, Y.Kalmykov, P.von Neumann-Cosel, V.Yu.Ponomarev, S.Rakers, B.Reitz, A.Richter, A.Shevchenko, K.Schweda, J.Wambach, H.J.Wortche

Polarized proton scattering on 58Ni at small momentum transfer: A test of the microscopic optical model and effective interactions

NUCLEAR REACTIONS 58Ni(polarized p, p'), (polarized p, p), E=172 MeV; measured elastic and inelastic σ(E, θ), analyzing powers. Comparison with model predictions.

doi: 10.1016/j.physletb.2005.03.020
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2005HO15      Nucl.Phys. A756, 249 (2005)

J.Honzatko, V.Bondarenko, I.Tomandl, T.von Egidy, H.-F.Wirth, D.Bucurescu, V.Yu.Ponomarev, N.Marginean, R.Hertenberger, Y.Eisermann, G.Graw, L.Rubacek

Nuclear structure of 127Te studied with (n, γ) and (d(pol), p) reactions and interpreted with IBFM and QPM

NUCLEAR REACTIONS 126Te(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin. 126Te(polarized d, p), E=20 MeV; measured proton spectra, σ(θ), Ay(θ). 127Te deduced levels, J, π, γ-branching ratios, binding energy, spectroscopic factors. DWBA and coupled-channels analysis, interacting boson-fermion and quasiparticle phonon model calculations.

doi: 10.1016/j.nuclphysa.2005.03.060
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2005PA12      J.Phys.(London) G31, 185 (2005)

P.Papakonstantinou, E.Mavrommatis, J.Wambach, V.Yu.Ponomarev

A microscopic investigation of the transition form factor in the region of collective multipole excitations of stable and unstable nuclei

NUCLEAR STRUCTURE 56,78,110Ni, 100,120,132Sn; calculated isoscalar and isovector response functions, transition form factor. Self-consistent Skyrme-Hartree-Fock plus continuum RPA model.

doi: 10.1088/0954-3899/31/3/003
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2005PA54      Phys.Lett. B 624, 195 (2005)

N.Paar, P.Papakonstantinou, V.Yu.Ponomarev, J.Wambach

Low-energy dipole excitations towards the proton drip-line: Doubly magic 48Ni

NUCLEAR STRUCTURE 48,56Ni; calculated dipole strength distributions, transition densities. Dirac-Hartree with self consistent relativistic RPA model, Skyrme-Hartree-Fock with continuum RPA model.

doi: 10.1016/j.physletb.2005.08.043
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2005PO16      Phys.Rev. C 72, 034309 (2005); Comment Phys.Rev. C 74, 059801 (2006); Erratum Phys.Rev. C 74, 069903 (2006)

V.Yu.Ponomarev, A.I.Vdovin

Test of the modified BCS model at finite temperature

NUCLEAR STRUCTURE 76,84Ni, 120Sn; calculated pairing gaps, chemical potential vs temperature; deduced limit of modified BCS model applicability.

doi: 10.1103/PhysRevC.72.034309
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2004EN03      Nucl.Phys. A741, 3 (2004)

J.Enders, T.Guhr, A.Heine, P.von Neumann-Cosel, V.Yu.Ponomarev, A.Richter, J.Wambach

Spectral statistics and the fine structure of the electric pygmy dipole resonance in N = 82 nuclei

NUCLEAR STRUCTURE 138Ba, 140Ce, 142Nd, 144Sm; analyzed electric pygmy dipole resonance strength distributions, level density; deduced statistical properties. Quasiparticle phonon model calculations.

doi: 10.1016/j.nuclphysa.2004.05.014
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2004PA36      Phys.Lett. B 604, 157 (2004)

P.Papakonstantinou, J.Wambach, E.Mavrommatis, V.Yu.Ponomarev

Nuclear vorticity and the low-energy nuclear response: towards the neutron drip line

NUCLEAR STRUCTURE 56,78,110Ni; calculated quadrupole, octupole, and hexadecapole strength distributions, vorticity. Self-consistent continuum RPA.

doi: 10.1016/j.physletb.2004.10.053
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2004SH34      Phys.Rev.Lett. 93, 122501 (2004)

A.Shevchenko, J.Carter, R.W.Fearick, S.V.Fortsch, H.Fujita, Y.Fujita, Y.Kalmykov, D.Lacroix, J.J.Lawrie, P.von Neumann-Cosel, R.Neveling, V.Yu.Ponomarev, A.Richter, E.Sideras-Haddad, F.D.Smit, J.Wambach

Fine Structure in the Energy Region of the Isoscalar Giant Quadrupole Resonance: Characteristic Scales from a Wavelet Analysis

NUCLEAR REACTIONS 58Ni, 90Zr, 120Sn, 208Pb(p, p'), E=200 MeV; measured Ep, σ(E, θ); deduced isoscalar giant quadrupole resonance strength distributions. Wavelet analysis.

doi: 10.1103/PhysRevLett.93.122501
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2003EN07      Nucl.Phys. A724, 243 (2003)

J.Enders, P.von Brentano, J.Eberth, A.Fitzler, C.Fransen, R.-D.Herzberg, H.Kaiser, L.Kaubler, P.von Neumann-Cosel, N.Pietralla, V.Yu.Ponomarev, A.Richter, R.Schwengner, I.Wiedenhover

Nuclear resonance fluorescence experiments on 204, 206, 207, 208Pb up to 6.75 MeV

NUCLEAR REACTIONS 204,206,207,208Pb(γ, γ'), E=6.75 MeV bremsstrahlung; measured Eγ, Iγ(θ). 204,206,207,208Pb deduced levels, J, π, B(M1), B(E2), pygmy resonance features. Quasiparticle-phonon model analysis.

doi: 10.1016/S0375-9474(03)01554-9
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2003TO08      Nucl.Phys. A717, 149 (2003)

I.Tomandl, T.von Egidy, J.Honzatko, V.Bondarenko, H.-F.Wirth, D.Bucurescu, V.Y.Ponomarev, G.Graw, R.Hertenberger, Y.Eisermann, S.Raman

Nuclear structure of 131Te studied with (n, γ) and (d(pol), p) reactions

NUCLEAR REACTIONS 130Te(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin, capture σ. 130Te(polarized d, p), E=18 MeV; measured particle spectra, σ(θ), asymmetry. 131Te deduced levels, J, π, binding energy, branching ratios, spectroscopic factors. Comparison with model predictions.

doi: 10.1016/S0375-9474(02)01390-8
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset31536. Data from this article have been entered in the XUNDL database. For more information, click here.


2003WI02      Nucl.Phys. A716, 3 (2003)

H.-F.Wirth, T.von Egidy, I.Tomandl, J.Honzatko, D.Bucurescu, N.Marginean, V.Yu.Ponomarev, R.Hertenberger, Y.Eisermann, G.Graw

Nuclear structure of 129Te studied with (n, γ), (d, p) and (d(pol), t) reactions

NUCLEAR REACTIONS 128Te(n, γ), E=thermal; measured Eγ, Iγ, γγ-coin. 128Te(n, p), E=18, 24 MeV; 130Te(polarized d, t), E=24 MeV; measured particle spectra, angular distributions. 129Te deduced levels, J, π, binding energy. Comparison with model predictions.

doi: 10.1016/S0375-9474(02)01401-X
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset31537. Data from this article have been entered in the XUNDL database. For more information, click here.


2002RE15      Phys.Lett. 532B, 179 (2002)

B.Reitz, A.M.van den Berg, D.Frekers, F.Hofmann, M.de Huu, Y.Kalmykov, H.Lenske, P.von Neumann-Cosel, V.Yu.Ponomarev, S.Rakers, A.Richter, G.Schrieder, K.Schweda, J.Wambach, H.J.Wortche

Direct Evidence for an Orbital Magnetic Quadrupole Twist Mode in Nuclei

NUCLEAR REACTIONS 58Ni(e, e'), E=65.4 MeV; 58Ni(p, p'), E=172 MeV; measured particle spectra, σ(E, θ). 58Ni deduced orbital M2 twist mode. Quasiparticle-phonon model, hydrodynamical model calculations.

doi: 10.1016/S0370-2693(02)01485-5
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2002RY06      Phys.Rev.Lett. 89, 272502 (2002)

N.Ryezayeva, T.Hartmann, Y.Kalmykov, H.Lenske, P.von Neumann-Cosel, V.Yu.Ponomarev, A.Richter, A.Shevchenko, S.Volz, J.Wambach

Nature of Low-Energy Dipole Strength in Nuclei: The Case of a Resonance at Particle Threshold in 208Pb

NUCLEAR REACTIONS 208Pb(γ, γ'), E=9.0 MeV bremsstrahlung; measured Eγ, Iγ. 208Pb deduced transitions, B(E1) strength distribution, resonance features. Quasiparticle phonon model calculations.

doi: 10.1103/PhysRevLett.89.272502
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2001BE69      Yad.Fiz. 64, No 11, 1987 (2001); Phys.Atomic Nuclei 64, 1901 (2001)

A.G.Belov, Yu.P.Gangrsky, L.M.Melnikova, V.Yu.Ponomarev, N.Tsoneva, Ch.Stoyanov, A.Tonchev, N.Balabanov

Excitation of Isomeric 1h11/2 States in Nuclear Reactions Induced by γ Rays and Neutrons and in Beta Decay

NUCLEAR REACTIONS 134Xe, 136Ba, 138Ce(n, γ), E ≈ 6.5-7.5 MeV; 136Xe, 138Ba, 140Ce, 142Nd, 144Sm(γ, n), E ≈ 3.5-6.1 MeV; measured activation yields, isomeric ratios. Comparison with model predictions.

RADIOACTIVITY 139Pr, 141Pm, 143Eu(β+); measured Eγ, Iγ. 139Ce, 141Nd, 143Sm; deduced probability for isomer population.

doi: 10.1134/1.1423740
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2001PO11      Nucl.Phys. A687, 170c (2001)

V.Yu.Ponomarev, P.F.Bortignon, R.A.Broglia, V.V.Voronov

Microscopic Studies of Multi-Phonon Resonances

NUCLEAR STRUCTURE 40Ca, 58Ni, 86Kr, 120Sn, 136Xe, 208Pb; calculated GDR and double GDR parameters, B(E1) strength distributions, energy weighted sum rules. Mean field plus multipole-multipole model.

doi: 10.1016/S0375-9474(01)00617-0
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2001VA04      Phys.Rev. C63, 024318 (2001)

B.D.Valnion, V.Yu.Ponomarev, Y.Eisermann, A.Gollwitzer, R.Hertenberger, A.Metz, P.Schiemenz, G.Graw

Excitation of 208Pb in Light Ion Induced Reactions and the Two Octupole Phonon Multiplet

NUCLEAR REACTIONS 208Pb(p, p'), (d, d'), E=22 MeV; 208Pb(α, α'), E=40 MeV; measured Ep, Eα, deuteron spectra, σ(θ). 208Pb(polarized d, p), E not given; measured proton spectra, Ay(θ). 208Pb deduced levels, J, π, spectroscopic factors, two-octupole-phonon multiplet states. Comparison with quasiparticle phonon model results.

doi: 10.1103/PhysRevC.63.024318
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2000BA63      Phys.Rev. C62, 024302 (2000)

F.Bauwens, J.Bryssinck, D.De Frenne, K.Govaert, L.Govor, M.Hagemann, J.Heyse, E.Jacobs, W.Mondelaers, V.Yu.Ponomarev

Dipole Transitions to Bound States in 56Fe and 58Ni

NUCLEAR REACTIONS 56Fe, 58Ni(γ, γ'), E=6.5, 10 MeV bremsstrahlung; 56Fe, 58Ni(polarized γ, γ'), E=12 MeV bremsstrahlung; measured Eγ, Iγ. 56Fe, 58Ni deduced levels, J, π, widths, dipole transition strength distributions. Nuclear resonance fluorescence. Quasiparticle phonon model calculations.

doi: 10.1103/PhysRevC.62.024302
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2000BR05      Phys.Rev. C61, 024309 (2000)

J.Bryssinck, L.Govor, V.Yu.Ponomarev, F.Bauwens, O.Beck, D.Belic, P.von Brentano, D.De Frenne, T.Eckert, C.Fransen, K.Govaert, R.-D.Herzberg, E.Jacobs, U.Kneissl, H.Maser, A.Nord, N.Pietralla, H.H.Pitz, V.Werner

Systematic Study of Electric Quadrupole Excitations in the Stable Even Mass Sn Nuclei

NUCLEAR REACTIONS 116,118,120,122,124Sn(γ, γ'), E=4.1 MeV bremsstrahlung; measured Eγ, Iγ. 116,118,120,122,124Sn deduced levels J, π, B(E1), B(E2).

doi: 10.1103/PhysRevC.61.024309
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