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NSR database version of May 23, 2024.

Search: Author = U.Friman-Gayer

Found 17 matches.

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2024MU04      Phys.Rev. C 109, 044318 (2024)

M.Muscher, E.Litvinova, R.Schwengner, T.Beck, D.Bemmerer, F.Fiedler, S.W.Finch, U.Friman-Gayer, S.Hammer, J.Isaak, R.V.F.Janssens, A.R.Junghans, N.Kelly, F.Kluwig, Krishichayan, S.E.Muller, O.Papst, K.Romer, D.Savran, M.Scheck, T.Schuttler, J.Sinclair, T.Szucs, W.Tornow, A.Wagner, J.Wilhelmy, A.Zilges

Low-lying dipole response of 64Ni

doi: 10.1103/PhysRevC.109.044318
Citations: PlumX Metrics


2023DE27      Eur.Phys.J. A 59, 198 (2023)

J.Deary, M.Scheck, R.Schwengner, D.O'Donnell, D.Bemmerer, R.Beyer, Th.Hensel, A.R.Junghans, T.Kogler, S.E.Muller, K.Romer, K.Schmidt, S.Turkat, S.Urlass, A.Wagner, M.Bowry, P.Adsley, O.Agar, R.Chapman, F.C.L.Crespi, D.T.Doherty, U.Friman-Gayer, R.-D.Herzberg, J.Isaak, R.V.F.Janssens, T.Kroll, B.Loher, B.S.Nara Singh, P.von Neumann-Cosel, L.Pellegri, E.E.Peters, G.Rainovski, D.Savran, J.F.Smith, M.Spieker, P.G.Thirolf, S.Triambak, W.Tornow, M.Venhart, M.Wiedeking, O.Wieland, S.W.Yates, A.Zilges

Photo-response of the N = Z nucleus 24Mg

NUCLEAR REACTIONS 24Mg(γ, γ'), E<13 MeV; measured reaction products, Eγ, Iγ; deduced energy-integrated scattering σ, B(M1), B(E1). Comparison with available data. The ELBE accelerator of the Helmholtz-Zentrum Dresden-Rossendorf.

doi: 10.1140/epja/s10050-023-01111-7
Citations: PlumX Metrics


2023JO08      Phys.Rev. C 108, 024315 (2023)

S.R.Johnson, R.V.F.Janssens, U.Friman-Gayer, B.A.Brown, B.P.Crider, S.W.Finch, Krishichayan, D.R.Little, S.Mukhopadhyay, E.E.Peters, A.P.D.Ramirez, J.A.Silano, A.P.Tonchev, W.Tornow, S.W.Yates

Testing shell-model interactions at high excitation energy and low spin: Nuclear resonance fluorescence in 74Ge

NUCLEAR REACTIONS 74Ge(polarized γ, γ'), E=3.1-5.44 MeV; measured Eγ, Iγ, γ(θ); deduced integrated exclusive scattering σ(E). 74Ge; deduced levels, J, π, branching ratios, transition intensities. Comparison to large-scale shell-model calculations with jj44b and JUN45 effective interactions. γ3-setup consisting of 6 HPGe detectors. Quasi-monoenergetic linearly polarized photon beams produced via Compton backscattering and provided by the High Intensity Gamma-Ray Source at TUNL.

doi: 10.1103/PhysRevC.108.024315
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022GR04      Phys.Rev. C 106, 014308 (2022)

D.Gribble, C.Iliadis, R.V.F.Janssens, U.Friman-Gayer, Krishichayan, S.Finch

Investigation of 11B and 40Ca levels at 8-9 MeV by nuclear resonance fluorescence

NUCLEAR REACTIONS 11B, 40Ca(polarized γ, γ'), E=8-9 MeV nearly monoenergetic and linearly polarized photon beams from the HIγS facility at TUNL; measured Eγ, Iγ, γ(θ, pol) using three HPGe detectors. 11B, 40Ca; deduced levels, J, π, polarization asymmetries, and branching ratios. 11B; analyzed γ-ray multipolarity mixing ratios using (polarized γ, γ') data from the present experiment and those from 2009Ru04: Phys. Rev. C 79, 047601. Discussed relationship of different phase conventions in nuclear resonance fluorescence (NRF) experiments.

doi: 10.1103/PhysRevC.106.014308
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022SA39      Phys.Rev. C 106, 044324 (2022)

D.Savran, J.Isaak, R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, S.W.Finch, C.Fransen, U.Friman-Gayer, R.Gonzalez, E.Hoemann, R.V.F.Janssens, S.R.Johnson, M.D.Jones, J.Kleemann, Krishichayan, D.R.Little, D.O'Donnell, O.Papst, N.Pietralla, J.Sinclair, V.Werner, O.Wieland, J.Wilhelmy

Model-independent determination of the dipole response of 66Zn using quasimonoenergetic and linearly polarized photon beams

NUCLEAR REACTIONS 66Zn(polarized γ, γ'), E=5.6-9.9 MeV; measured Eγ, Iγ, γγ-coin; deduced elastic, inelastic and total photoabsorption σ(E), average ground-state branching ratio, ratio of M1 to E1 elastic σ(E). Comparison to other experimental results. γ3-detector setup consisting of HPGe and LaBr3:Ce detectors at HIγS facility of the TUNL at Duke University.

doi: 10.1103/PhysRevC.106.044324
Citations: PlumX Metrics


2021FR01      Phys.Rev.Lett. 126, 102501 (2021)

U.Friman-Gayer, C.Romig, T.Huther, K.Albe, S.Bacca, T.Beck, M.Berger, J.Birkhan, K.Hebeler, O.J.Hernandez, J.Isaak, S.Konig, N.Pietralla, P.C.Ries, J.Rohrer, R.Roth, D.Savran, M.Scheck, A.Schwenk, R.Seutin, V.Werner

Role of Chiral Two-Body Currents in 6Li Magnetic Properties in Light of a New Precision Measurement with the Relative Self-Absorption Technique

RADIOACTIVITY 6Li(IT) [from 6Li(γ, γ'), E<7.1 MeV]; measured decay products, Eγ, Iγ; deduced B(M1), decay width. Comparison with ab initio calculations based on chiral effective field theory that take into account contributions to the magnetic dipole operator beyond leading order.

doi: 10.1103/PhysRevLett.126.102501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021ID01      Phys.Rev. C 103, 054302 (2021)

K.E.Ide, T.Beck, V.Werner, M.Berger, S.W.Finch, U.Friman-Gayer, J.Kleemann, Krishichayan, B.Loher, O.Papst, N.Pietralla, D.Savran, W.Tornow, M.Weinert, J.Wiederhold, A.Zilges

E2 decay characteristics of the M1 scissors mode of 152Sm

NUCLEAR REACTIONS 152Sm(polarized γ, γ'), E=3 MeV; measured Eγ, Iγ, γ(polarization azimuthal asymmetry) by nuclear resonance fluorescence (NRF) method using four HPGe detectors at the HIγS facility at TUNL. 152Sm; deduced levels, J, π, B(M1), B(E1), γ-branching ratios to the ground state and the first 2+ state, E2/M1 multipole mixing ratios, B(E2), summed scissors mode B(M1). Comparison with predictions of interacting boson model-2 (IBM-2); predicted energy and transition strength of the 2+ mixed-symmetry state.

doi: 10.1103/PhysRevC.103.054302
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021IL01      Eur.Phys.J. A 57, 190 (2021)

C.Iliadis, U.Friman-Gayer

Linear polarization-direction correlations in γ-ray scattering experiments

doi: 10.1140/epja/s10050-021-00472-1
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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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0273. Data from this article have been entered in the XUNDL database. For more information, click here.


2021KL04      Phys.Rev. C 104, L061302 (2021)

J.Kleemann, T.Beck, U.Friman-Gayer, N.Pietralla, V.Werner, S.W.Finch, J.Kotila, Krishichayan, B.Loher, H.Pai, O.Papst, W.Tornow, M.Weinert, A.Zilges

Majorana parameters of the interacting boson model of nuclear structure and their implication for 0νββ decay

NUCLEAR REACTIONS 150Nd(polarized γ, γ'), E=2994 keV; 150Sm(polarized γ, γ'), E=3113 keV; measured Eγ, Iγ, γ(θ), γ(linear polarization) at the High Intensity γ-ray Source (HIγS) of Duke University. 150Sm, 150Nd; deduced γ-branching ratios from the 1+ scissors mode state to the first excited 0+ and second 2+ state in 150Nd, negative parity for the 3082-keV in 150Sm, J=1 level, in disagreement with positive parity assigned in the ENSDF database, and confirmed 1+ for the 2994-keV level in 150Nd; calculated positive-parity levels and B(M1) for 1+ scissors mode (SCM) states using IBM-2, and compared with experimental data in the ENSDF database. Relevance to 0νββ decay mode of 150Nd.

RADIOACTIVITY 150Nd(2β-); calculated nuclear matrix elements (NMEs) for 0νββ decay to the g.s. and the first excited 0+ state in 150Sm using interacting boson model-2 (IBM-2), and compared with predictions of energy density-functional (EDF) method; deduced strong constraints for the Majorana parameters.

doi: 10.1103/PhysRevC.104.L061302
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Data from this article have been entered in the XUNDL database. For more information, click here.


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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Data from this article have been entered in the XUNDL database. For more information, click here.


2021SC06      Phys.Rev. C 103, 024312 (2021)

R.Schwengner, R.Massarczyk, M.Scheck, W.Tornow, G.Battaglia, T.Beck, D.Bemmerer, N.Benouaret, R.Beyer, M.Butterling, F.Fiedler, S.W.Finch, C.Fransen, U.Friman-Gayer, A.Frotscher, R.Gonzalez, M.Grieger, A.Hartmann, T.Hensel, E.Hoemann, H.Hoffmann, R.V.F.Janssens, S.Johnson, M.D.Jones, A.R.Junghans, N.Kelly, J.Kleemann, Krishichayan, D.R.Little, F.Ludwig, S.E.Muller, D.O'Donnell, O.Papst, E.Pirovano, J.Sinclair, M.P.Takacs, S.Turkat, S.Urlass, A.Wagner, V.Werner, O.Wieland, J.Wilhelmy

Electric and magnetic dipole strength in 66Zn

NUCLEAR REACTIONS 66Zn(γ, γ'), (polarized γ, γ'), E=7.5, 13.4, MeV unpolarized bremsstrahlung from γELBE facility, and E=4.3, 4.4, 4.55, 4.7, 4.85, 5.0, 5.15, 5.3, 5.45, 5.6, 5.75, 5.9, 6.1, 6.3, 6.5, 6.7, 6.9, 7.1, 7.3, 7.5, 7.7, 7.9, 8.15, 8.4, 8.65, 8.9, 9.15, 9.4, 9.65, 9.9 MeV quasimonoenergetic and linearly polarized photon beams from HIγS facility; measured Eγ, Iγ, γγ(θ), γ(linear polarization) using four escape-suppressed HPGe detectors at γELBE and using two HPGe detectors at HIγS. 66Zn; deduced 128 J=1 levels up to 11.02 MeV excitation, pygmy dipole resonances (PDR), J, π, energy-integrated scattering σ, Γ02/Γ, photoabsorption σ, photon strength functions, B(M1). Comparison of measured photoabsorption cross sections with experimental values in 54Fe(γ, γ'), and with calculations using TALYS code as in the 2019 library, and from the three Lorentz functions (TLO). Comparison of B(M1) strengths with shell-model calculations using the jj44c Hamiltonian. Comparison of deduced photon strength functions with those from 64Ni(p, p'γ).

doi: 10.1103/PhysRevC.103.024312
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0269.


2020BE22      Phys.Rev.Lett. 125, 092501 (2020)

T.Beck, V.Werner, N.Pietralla, M.Bhike, N.Cooper, U.Friman-Gayer, J.Isaak, R.V.Jolos, J.Kleemann, Krishichayan, O.Papst, W.Tornow, C.Bernards, B.P.Crider, R.S.Ilieva, B.Loher, C.Mihai, F.Naqvi, S.Pascu, E.E.Peters, F.M.Prados-Estevez, T.J.Ross, D.Savran, J.R.Vanhoy, A.Zilges

ΔK = 0 m1 Excitation Strength of the Well-Deformed Nucleus 164Dy from K Mixing

NUCLEAR REACTIONS 164Dy(γ, γ'), E=3-3.2 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, B(M1), reduced relative decay-intensity ratios, excitation strengths.

doi: 10.1103/PhysRevLett.125.092501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020PA32      Phys.Rev. C 102, 034323 (2020)

O.Papst, V.Werner, J.Isaak, N.Pietralla, T.Beck, C.Bernards, M.Bhike, N.Cooper, B.P.Crider, U.Friman-Gayer, J.Kleemann, Krishichayan, B.Loher, F.Naqvi, E.E.Peters, F.M.Prados-Estevez, R.S.Ilieva, T.J.Ross, D.Savran, W.Tornow, J.R.Vanhoy

Photo response of 164Dy

NUCLEAR REACTIONS 164Dy(polarized γ, γ'), E=4.0-7.7 MeV; measured Eγ, Iγ, γ(polarization azimuthal asymmetry) using four HPGe detectors at the HIγS facility of TUNL. 164Dy; deduced levels, J, π, energy-integrated cross sections, widths, B(E1), B(M1), γ-branching ratios to the ground state and the first 2+ state, mean population ratios of the first and second 2+ states, and first 3+ state, photon strength function (PSF) and nuclear level density (NLD). Comparison with statistical model calculations.

doi: 10.1103/PhysRevC.102.034323
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0268. Data from this article have been entered in the XUNDL database. For more information, click here.


2020SC07      Phys.Rev. C 101, 064303 (2020)

R.Schwengner, R.Massarczyk, R.Beyer, M.Bhike, B.A.Brown, Krishichayan, K.Sieja, W.Tornow, D.Bemmerer, M.Butterling, V.Derya, M.Dietz, F.Fiedler, U.Friman-Gayer, A.Frotscher, M.Grieger, A.Hartmann, A.R.Junghans, T.Kogler, F.Ludwig, B.Lutz, H.Pai, T.Szucs, M.P.Takacs, A.Wagner

Electric and magnetic dipole strength in 54Fe

NUCLEAR REACTIONS 54Fe(polarized γ, γ'), E=4.3-13.0 MeV; measured Eγ, Iγ, γ(θ), γ(polarization asymmetry), and integrated scattering cross sections, absolute photoabsorption σ(E) using HPGe detectors at the γELBE facility of the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), and at the HIγS facility at TUNL. 54Fe; deduced levels, J, π, B(E1), B(M1). Comparison with shell-model predictions.

doi: 10.1103/PhysRevC.101.064303
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0262. Data from this article have been entered in the XUNDL database. For more information, click here.


2020SI09      Eur.Phys.J. A 56, 105 (2020)

J.Sinclair, M.Scheck, S.W.Finch, Krishichayan, U.Friman-Gayer, W.Tornow, G.Battaglia, T.Beck, R.Chapman, M.M.R.Chishti, Ch.Fransen, R.Gonzales, E.Hoemann, J.Isaak, R.V.F.Janssens, D.A.Jaroszynski, S.Johnson, M.D.Jones, J.M.Keatings, N.Kelly, J.Kleemann, D.Little, B.Loher, K.R.Mashtakov, M.Muscher, D.O'Donnell, O.Papst, E.E.Peters, D.Savran, M.Schilling, R.Schwengner, P.Spagnoletti, M.Spieker, V.Werner, J.Wilhelmy, O.Wieland, S.W.Yates, A.Zilges

Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

doi: 10.1140/epja/s10050-020-00118-8
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2020WI09      Phys.Rev. C 102, 044327 (2020)

J.Wilhelmy, M.Muscher, G.Rusev, R.Schwengner, R.Beyer, M.Bhike, P.Erbacher, F.Fiedler, U.Friman-Gayer, J.Glorius, R.Greifenhagen, S.Hammer, T.Hensel, J.Isaak, A.R.Junghans, Krishichayan, B.Loher, S.E.Muller, N.Pietralla, S.Reinicke, D.Savran, P.Scholz, K.Sonnabend, T.Szucs, M.Tamkas, W.Tornow, S.Turkat, A.Wagner, A.Zilges

Dipole response of 87Rb and its impact on the 86Rb (n, γ) 87Rb cross section

NUCLEAR REACTIONS 87Rb(γ, γ'), E=8.2, 13.2 MeV bremsstrahlung beam; measured Eγ, Iγ, γ(θ) using four HPGe detectors at the γ-ELBE facility in Dresden. 87Rb(polarized γ, γ'), E=5.10, 5.30, 5.50, 5.75, 6.00, 6.25, 6.50, 6.75, 7.00, 7.25, 7.50, 7.80, 8.10, 8.40, 8.70, 9.00, 9.30, 9.60 MeV; measured Eγ, Iγ, azimuthal asymmetry using four LaBr3:Ce scintillators and four HPGe detectors at the HIγS facility of TUNL; deduced energy-integrated σ(excitation energy), γ-ray sum spectra, photoabsorption σ(E), E1-photon strength functions (PSFs), nuclear level densities (NLDs), Thomas-Reiche-Kuhn (TRK) sum rule. Comparison with QRPA calculations for PSFs, and microscopic Hartree-Fock-Bogolyubov calculations with Skyrme and Gogny forces for NLDs. 87Rb; deduced 256 discrete levels from 845 to 10005 keV, J, π, gΓ02/Γ, γ-ray branching ratios for selected levels, as listed in supplemental material. 86Rb(n, γ), kT=5-100 keV; deduced Maxwellian cross sections (MACSs) for different PSF and NLD inputs, and compared to data in KADoNiS database.

doi: 10.1103/PhysRevC.102.044327
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0266.


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