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NSR database version of May 30, 2024.

Search: Author = A.Tonchev

Found 96 matches.

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2024GO04      Phys.Rev. C 109, 044604 (2024)

M.E.Gooden, R.C.Malone, T.A.Bredeweg, E.M.Bond, S.W.Finch, C.R.Howell, Krishichayan, A.P.D.Ramirez, J.A.Silano, M.A.Stoyer, A.P.Tonchev, W.Tornow, D.Vieira, J.B.Wilhelmy

Energy dependence of fission product yields in the second-chance fission region

doi: 10.1103/PhysRevC.109.044604
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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.


2023MA16      Appl.Radiat.Isot. 195, 110742 (2023)

A.M.Marenco, G.Rusev, E.M.Bond, T.A.Bredeweg, S.W.Finch, J.R.Garcia, M.E.Gooden, Krishichayan, R.C.Malone, W.A.Moody, A.P.D.Ramirez, J.A.Silano, A.P.Tonchev, W.Tornow

Cross section for inelastic neutron scattering from 193Ir at 6 MeV

NUCLEAR REACTIONS 193Ir, Ir(n, n')193mIr, E=6 MeV; measured reaction products, X-rays; deduced σ. Comparison with available data, ENDF/B-VIII.0 library. The tandem lab of TUNL.

doi: 10.1016/j.apradiso.2023.110742
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2023RA05      Phys.Rev. C 107, 054608 (2023)

A.P.D.Ramirez, J.A.Silano, R.C.Malone, M.A.Stoyer, A.P.Tonchev, M.E.Gooden, J.B.Wilhelmy, S.W.Finch, C.R.Howell, Krishichayan, W.Tornow

Fission product yields from the 238U(n, f) reaction at En = 4.6 MeV

NUCLEAR REACTIONS 238U(n, F)86mKr/86Kr/88Kr/89Rb/91Sr/92Sr/94Y/97Nb/101Mo/104Tc/105Ru/129Sb/131Te/131Sb/133I/134Te/134I/135Xe/138Xe/138Cs/139Ba/141Ba/142Ba/142La/146Ce/146Pr/147Pr/84As/86Se/86Br/87Br/88Br/89Kr/90Kr/91Kr/91Rb/92Kr/93Kr/93Rb/93Sr/94Rb/94Sr/95Sr/96Sr/96mY/96Y/97mY/98Sr/98mY/99Zr/99Nb/100Y/100Zr/101Zr/101Nb/102Zr/103Tc/106Tc/130Sn/132Sn/133Sb/134mSb/135Te/136Te/136mI/137Xe/138I/139Xe/140Xe/140Cs/141Xe/142Cs/142Ba/143Cs/143Ba/144La/145Ce/148La, E=4.6 MeV; measured neutron time-of-flight, Eγ, Iγ; deduced cumulative fission product yields. Comparison to experimental and evaluated data from ENDF/B-VIII.0 and JEFF-3.3 libraries and with theoretical models using the GEF and FREYA codes. Cyclic activation technique using the RApid Belt-driven Irradiated Target Transfer System (RABITTS) at the 10 MV tandem Van de Graaff accelerator (TUNL).

doi: 10.1103/PhysRevC.107.054608
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2023SC05      Phys.Rev. C 107, 044312 (2023)

N.Schunck, M.Verriere, G.Potel Aguilar, R.C.Malone, J.A.Silano, A.P.D.Ramirez, A.P.Tonchev

Microscopic calculation of fission product yields for odd-mass nuclei

NUCLEAR REACTIONS 236,238U(n, F), E=2.2-7.2 MeV; calculated mass distribution of the light fission fragment before prompt emission, fission fragment mass distribution after neutron emission, ratio of neutron over proton numbers in the fission fragments, axial quadrupole and octupole deformation in the fission fragments, probability to populate a given spin projection. Hartree-Fock-Bogoliubov theory with Skyrme energy functionals combined with FREYA calculations. Comparison to available experimental data, GEF-2021/1.1 calculations and ENDF/B-VIII.0, JEFF-3.3, and JENDL-5 evaluations.

NUCLEAR STRUCTURE 237,239U; calculated levels, J, π, spectrum of quasi-bound states for each spin projection, potential energy curves in as a function of the axial quadrupole moment. Generator coordinate method with Gaussian overlap approximation.

doi: 10.1103/PhysRevC.107.044312
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2022HO01      J.Phys.(London) G49, 010502 (2022)

C.R.Howell, M.W.Ahmed, A.Afanasev, D.Alesini, J.R.M.Annand, A.Aprahamian, D.L.Balabanski, S.V.Benson, A.Bernstein, C.R.Brune, J.Byrd, B.E.Carlsten, A.E.Champagne, S.Chattopadhyay, D.Davis, E.J.Downie, J.M.Durham, G.Feldman, H.Gao, C.G.R.Geddes, H.W.Griesshammer, R.Hajima, H.Hao, D.Hornidge, J.Isaak, R.V.F.Janssens, D.P.Kendellen, M.Kovash, P.P.Martel, U.-G.Meissner, R.Miskimen, B.Pasquini, D.R.Phillips, N.Pietralla, D.Savran, M.R.Schindler, M.H.Sikora, W.M.Snow, R.P.Springer, C.Sun, C.Tang, B.Tiburzi, A.P.Tonchev, W.Tornow, C.A.Ur, D.Wang, H.R.Weller, V.Werner, Y.K.Wu, J.Yan, Z.Zhao, A.Zilges, F.Z.Zomer

International workshop on next generation gamma-ray source

doi: 10.1088/1361-6471/ac2827
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2022TO13      Phys.Lett. B 835, 137576 (2022)

W.Tornow, A.P.Tonchev, S.W.Finch, Krishichayan, X.B.Wang, A.C.Hayes, H.G.D.Yeomans, D.A.Newmark

Neutral-current neutrino cross section and expected supernova signals for 40Ar from a three-fold increase in the magnetic dipole strength

NUCLEAR REACTIONS 40Ar(γ, γ'), E=9.4-10.2 MeV; measured reaction products, Eγ, Iγ; calculated the neutral-current neutrino σ using shell model; deduced γ-ray energies, J, π, resonance parameters, B(M1), B(E1). The Nuclear Resonance Fluorescence (NRF) technique, the High-Intensity Gamma-Ray Source (HIγS) of the Triangle Universities Nuclear Laboratory (TUNL).

doi: 10.1016/j.physletb.2022.137576
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2021KO09      Nucl.Instrum.Methods Phys.Res. A1000, 165240 (2021)

K.Kolos, A.M.Hennessy, N.D.Scielzo, V.E.Iacob, J.C.Hardy, M.A.Stoyer, A.P.Tonchev, W.-J.Ong, M.T.Burkey, B.Champine, J.A.Clark, P.Copp, A.Gallant, E.B.Norman, R.Orford, H.I.Park, J.Rohrer, D.Santiago-Gonzalez, G.Savard, A.J.Shaka, B.S.Wang, S.Zhu

New approach to precisely measure γ-ray intensities for long-lived fission products, with results for the decay of 95Zr

RADIOACTIVITY 95Zr, 95Nb, 95Sr, 95Y(β-); measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced γ-ray energies and intensities, β-branching ratios. Comparison with a Monte Carlo decay code simulations. CARIBU facility, the reactor facility at TAMU.

doi: 10.1016/j.nima.2021.165240
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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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Data from this article have been entered in the XUNDL database. For more information, click here.


2019KR10      Phys.Rev. C 100, 014608 (2019)

Krishichayan, M.Bhike, C.R.Howell, A.P.Tonchev, W.Tornow

Fission product yield measurements using monoenergetic photon beams

NUCLEAR REACTIONS 235,238U, 239Pu(polarized γ, F)84Br/85mKr/87Kr/88Kr/91Sr/92Sr/92Y/93Y/94Y/95Zr/97Zr/99Mo/103Ru/104Tc/105Ru/105Rh/115Cd/127Sb/128Sn/129Sb/130Sb/131Sb/131I/132Te/132Cs/133Te/133I/134Te/135I/136Cs/138Cs/139Ba/140Ba/141Ba/141Ce/142La/143Ce/146Pr/147Nd/149Nd/151Pm, E=13 MeV; measured fission fragments, Eγ, Iγ, fission product yields (FPY) using dual fission chamber for fission fragments and offline γ detection at TUNL-HIγS facility. Comparison with previous experimental neutron- and photon-induced fission product yields.

RADIOACTIVITY 91,92Sr, 142La(β-)[from 235,238U, 239Pu(polarized γ, F), E=13 MeV at TUNL-HIγS facility]; measured half-lives of decay of 91Sr, 92Sr, and 142La, and compared with values from ENSDF database at NNDC.

doi: 10.1103/PhysRevC.100.014608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0225. Data from this article have been entered in the XUNDL database. For more information, click here.


2019PI01      Nucl.Data Sheets 155, 86 (2019)

B.D.Pierson, A.M.Prinke, L.R.Greenwood, S.C.Stave, R.S.Wittman, J.G.Burch, J.T.Burke, S.W.Padgett, J.J.Ressler, G.Slavik, A.Tamashiro, A.Tonchev, W.Younes

Improved Cumulative Fission Yield Measurements with Fission Spectrum Neutrons on 235U

NUCLEAR REACTIONS 235U(n, F)84Br/89Rb/91Sr/93Y/97Zr/101Mo/105Ru/128Sn/129Sb/130Sb/131Sb/131Te/133I/135I/141Ba/142Ba/142La/89Rb/93Y/128Sn/129Sb/130Sb/94Y/134Te/134I/138Xe, E ∼ 2 MeV; measured fission products, Eγ, Iγ; deduced cumulative fission yields.

doi: 10.1016/j.nds.2019.01.005
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14512.


2019SH01      Nature(London) 565, 328 (2019)

J.A.Shusterman, N.D.Scielzo, K.J.Thomas, E.B.Norman, S.E.Lapi, C.S.Loveless, N.J.Peters, J.D.Robertson, D.A.Shaughnessy, A.P.Tonchev

The surprisingly large neutron capture cross-section of 88Zr

NUCLEAR REACTIONS 88Zr(n, γ), E thermal; measured reaction products, Eγ, Iγ; deduced σ.

doi: 10.1038/s41586-018-0838-z
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14520.


2018KR03      Phys.Rev. C 98, 014608 (2018), Erratum Phys.Rev. C 107, 039906 (2023)

Krishichayan, S.W.Finch, C.R.Howell, A.P.Tonchev, W.Tornow

Monoenergetic photon-induced fission cross-section ratio measurements for 235U, 238U, and 239Pu from 9.0 to 17.0 MeV

NUCLEAR REACTIONS 235,238U, 239Pu(polarized γ, F), E=9.0-17.0 MeV; measured fission fragments, photofission σ(E), cross sections ratios for the target nuclei using dual-fission ionization chamber (DFC), and quasimonoenergetic Compton backscattered photon beam from HIγS facility of TUNL. Comparison with previous experimental values, with evaluated data in ENDF/B-VII.1 library, and with theoretical calculations using TENDL-2009 code.

doi: 10.1103/PhysRevC.98.014608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0233.


2018TO09      Phys.Rev. C 98, 064305 (2018)

W.Tornow, M.Bhike, S.W.Finch, Krishichayan, A.P.Tonchev

Measurement of the 115In (γ, γ') 115mIn inelastic scattering cross section in the 1.8 to 3.7 MeV energy range with monoenergetic photon beams

NUCLEAR REACTIONS 115In(γ, γ')115mIn, E=1.8-3.7 MeV; measured Eγ, Iγ, σ(E) for the 336-keV isomer in 115In at the High-Intensity Gamma-ray Source (HIγS) of TUNL. Comparison with different TALYS-1.9 evaluations. 115In(γ, n), E=9-25 MeV; calculated σ(E) using TALYS-1.9 code with the default values and with the Gogny D1M HFB+QRPA model for the level density, E1 and M1 strengths.

doi: 10.1103/PhysRevC.98.064305
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0237.


2017BH03      Phys.Rev. C 95, 024608 (2017)

M.Bhike, W.Tornow, Krishichayan, A.P.Tonchev

Exploratory study of fission product yield determination from photofission of 239Pu at 11 MeV with monoenergetic photons

NUCLEAR REACTIONS 239Pu(γ, F)91Sr/92Sr/97Zr/99Mo/133I/134I/138Cs/143Ce, E=11 MeV from Compton back-scattering of free electron laser (FEL) photons at TUNL High Intensity Gamma-Ray Source (HIγS); measured off-line Eγ, Iγ, cumulative fission product yields (FPYs). Comparison with experimental yields from neutron-induced fission and photon-induced fission for Eγ(max)=28 MeV.

doi: 10.1103/PhysRevC.95.024608
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0221.


2017KR02      Nucl.Instrum.Methods Phys.Res. A854, 40 (2017)

Krishichayan, M.Bhike, S.W.Finch, C.R.Howell, A.P.Tonchev, W.Tornow

Photofission cross-section ratio measurement of 235U/238U using monoenergetic photons in the energy range of 9.0-16.6 MeV

NUCLEAR REACTIONS 235,238U(γ, F), E=9.0-16.6 MeV; measured fission fragments, Eγ, Iγ; deduced fission σ ratio. Comparison with experimental and ENDF/B-VII.1 evaluated data.

doi: 10.1016/j.nima.2017.02.043
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0222.


2017KR09      Phys.Rev. C 96, 044623 (2017)

Krishichayan, M.Bhike, W.Tornow, A.P.Tonchev, T.Kawano

Accurate 238U (n, 2n) 237U reaction cross-section measurements from 6.5 to 14.8 MeV

NUCLEAR REACTIONS 238U(n, 2n)237U, E=6.34, 6.89, 7.40, 7.87, 8.38, 8.89, 9.40, 9.91, 10.41, 10.92, 11.42, 11.93, 12.43, 13.60, 14.10, 14.8 MeV; 197Au(n, 2n)196Au, E=9.91, 10.41, 10.92, 11.42, 11.93, 12.43, 13.60, 14.10, 14.80 MeV; 27Al(n, α)24Na, E=6.34, 6.89, 7.40, 7.87, 8.38, 8.89, 9.40 MeV; measured Eγ, Iγ, σ(E) by activation method at the FN Tandem Accelerator of the Triangle Universities Nuclear Laboratory (TUNL). 237U, 196Au, 24Na; measured half-lives of the decays of the ground states from γ-decay curves, and compared with literature values. Comparison of cross section data with previous measurements, evaluated data in ENDF/B-VIII.b4, JEFF-3.2, JENDL-4.0, BROND-2.2, CENDL-3.1, ROSFOND-2010, Zolotarev and Zhou You-Pu libraries, and with Hauser-Feshbach model based theoretical calculation.

doi: 10.1103/PhysRevC.96.044623
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14482.


2017TO16      Phys.Lett. B 773, 20 (2017)

A.P.Tonchev, N.Tsoneva, C.Bhatia, C.W.Arnold, S.Goriely, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, J.Piekarewicz, R.Raut, G.Rusev, T.Shizuma, W.Tornow

Pygmy and core polarization dipole modes in 206Pb: Connecting nuclear structure to stellar nucleosynthesis

NUCLEAR REACTIONS 208Pb(γ, γ'), E=4.9-8.1 MeV; analyzed available data; deduced a range for the neutron-skin thickness of and a corresponding range for the slope of the symmetry energy, Maxwellian-averaged radiative σ.

doi: 10.1016/j.physletb.2017.07.062
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2016CH04      Phys.Rev. C 93, 014611 (2016)

B.Champine, M.E.Gooden, Krishichayan, E.B.Norman, N.D.Scielzo, M.A.Stoyer, K.J.Thomas, A.P.Tonchev, W.Tornow, B.S.Wang

Measurement of the 169Tm(n, 3n)167Tm cross section and the associated branching ratios in the decay of 167Tm

NUCLEAR REACTIONS 169Tm(n, 3n), 58Ni, 90Zr, 169Tm(n, 2n), 94Zr(n, α), E=17.35, 18.34, 19.33, 20.32, 21.31 MeV, [quasimonoenergetic neutrons from 2H(d, n), E=15.0-19.2 at TUNL tandem Van de Graaff accelerator]; measured neutron spectra, Eγ, Iγ, σ(E) by activation method. Comparison with previous experimental data, compiled data in EXFOR database and evaluated data in ENDF database. Relevance to measurement of yield of reaction-in-flight neutrons at the LLNL National Ignition Facility (NIF).

RADIOACTIVITY 167Tm(EC)[from 165Ho(α, 2n), E=29 MeV at LBNL cyclotron facility]; measured Eγ, Iγ, I(x rays), source activity; deduced branching ratios of 207.8-keV and 531.5-keV γ rays. Comparison with previous experimental values and evaluated data.

doi: 10.1103/PhysRevC.93.014611
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14447. Data from this article have been entered in the XUNDL database. For more information, click here.


2016GO02      Nucl.Data Sheets 131, 319 (2016)

M.E.Gooden, C.W.Arnold, J.A.Becker, C.Bhatia, M.Bhike, E.M.Bond, T.A.Bredeweg, B.Fallin, M.M.Fowler, C.R.Howell, J.H.Kelley, Krishichayan, R.Macri, G.Rusev, C.Ryan, S.A.Sheets, M.A.Stoyer, A.P.Tonchev, W.Tornow, D.J.Vieira, J.B.Wilhelmy

Energy Dependence of Fission Product Yields from 235U, 238U and 239Pu for Incident Neutron Energies Between 0.5 and 14.8 MeV

NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=0.5-14.8 MeV; measured reaction products, Eγ, Iγ; deduced fission yields.

doi: 10.1016/j.nds.2015.12.006
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14555.


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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0215.


2015BE02      Phys.Lett. B 741, 128 (2015)

J.Beller, C.Stumpf, M.Scheck, N.Pietralla, D.Deleanu, D.M.Filipescu, T.Glodariu, W.Haxton, A.Idini, J.H.Kelley, E.Kwan, G.Martinez-Pinedo, R.Raut, C.Romig, R.Roth, G.Rusev, D.Savran, A.P.Tonchev, W.Tornow, J.Wagner, H.R.Weller, N.-V.Zamfir, M.Zweidinger

Separation of the 1+/1- parity doublet in 20Ne

NUCLEAR REACTIONS 20Ne, 28Si(polarized γ, γ'), E=11.26 MeV; measured reaction products, Eγ, Iγ; deduced the energy difference of the parity doublet, the ratio of their integrated σ. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2014.12.018
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Data from this article have been entered in the XUNDL database. For more information, click here.


2015BH09      Phys.Rev. C 91, 064604 (2015)

C.Bhatia, B.F.Fallin, M.E.Gooden, C.R.Howell, J.H.Kelley, W.Tornow, C.W.Arnold, E.Bond, T.A.Bredeweg, M.M.Fowler, W.Moody, R.S.Rundberg, G.Y.Rusev, D.J.Vieira, J.B.Wilhelmy, J.A.Becker, R.Macri, C.Ryan, S.A.Sheets, M.A.Stoyer, A.P.Tonchev

Exploratory study of fission product yields of neutron-induced fission of 235U, 238U, and 239Pu at 8.9 MeV

NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=8.9 MeV; measured Eγ, Iγ of fission products of 92Sr, 97Zr, 99Mo, 105Ru, 132Te, 133I, 140Ba, 143Ce, 147Nd at TUNL facility; deduced absolute fission product yields by γ activation method. Comparison with previous experimental results.

doi: 10.1103/PhysRevC.91.064604
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14423.


2015KR04      Phys.Rev. C 91, 044328 (2015)

Krishichayan, M.Bhike, W.Tornow, G.Rusev, A.P.Tonchev, N.Tsoneva, H.Lenske

Polarized photon scattering off 52Cr Determining the parity of J=1 states

NUCLEAR REACTIONS 52Cr(polarized γ, γ'), E=5.21, 5.56, 6.40, 6.50, 7.00, 7.08, 7.19, 7.40, 7.51, 7.74, 7.89, 8.02, 8.11, 8.20, 8.75, 8.95, 9.15, 9.25, 9.36, 9.45 MeV; measured Eγ, Iγ, linear polarization using High Intensity γ-Ray Source (HIγS) facility of TUNL. 52Cr; deduced levels, J, π, B(M1), B(E1), E1 and M1 strength functions, spin-flip M1 resonance structure around 9.1 MeV, fragmentation pattern of the dipole strength below and around the neutron emission threshold, new mode of excitation related to pygmy dipole resonance (PDR). Comparison with calculations using three-phonon quasiparticle phonon model (QPM) with self-consistent energy-density functional theory.

doi: 10.1103/PhysRevC.91.044328
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Data from this article have been entered in the XUNDL database. For more information, click here.


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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2014BH10      Nucl.Data Sheets 119, 176 (2014)

C.Bhatia, M.E.Gooden, W.Tornow, A.P.Tonchev

Measurements of the (n, 2n) Reaction Cross Section of 181Ta from 8 to 15 MeV

NUCLEAR REACTIONS 181Ta(n, 2n), E=8-15 MeV; measured activation Eγ, Iγ; deduced γ transitions, σ. Compared with other data, ENDF/B-VII.1, TUNL-2012 and TENDL-2011.

doi: 10.1016/j.nds.2014.08.049
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14358.


2014BH11      Nucl.Data Sheets 119, 324 (2014)

C.Bhatia, B.Fallin, C.Howell, W.Tornow, M.Gooden, J.Kelley, C.Arnold, E.Bond, T.Bredeweg, M.Fowler, W.Moody, R.Rundberg, G.Rusev, D.Vieira, J.Wilhelmy, J.Becker, R.Macri, C.Ryan, S.Sheets, M.Stoyer, A.Tonchev

Fission Product Yield Study of 235U, 238U and 239Pu Using Dual-Fission Ionization Chambers

NUCLEAR REACTIONS 235,238U, 239Pu(n, F), E=4.6, 9.0, 14.5 MeV; measured Eγ, Iγ(t) from fission fragments using dual fission chamber; deduced fission products yield ratio. Compared with other data and libraries.

doi: 10.1016/j.nds.2014.08.089
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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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2014DE13      Phys.Rev. C 89, 055802 (2014)

R.J.de Boer, A.Best, J.Gorres, K.Smith, W.Tan, M.Wiescher, R.Raut, G.Rusev, A.P.Tonchev, W.Tornow

Photoneutron strengths in 26Mg at energies of astrophysical interest

NUCLEAR REACTIONS 26Mg(polarized γ, n), [circularly polarized γ beam produced in Compton backscattering of laser photons from E=498-548 MeV electrons], E=10.80-12.05 MeV; measured Eγ, Iγ, E(n), I(n), time-of-flight spectra, photoneutron σ(E) at HIγS facility of TUNL. 26Mg; deduced level energies above S(n), resonance strengths, comparison with 25Mg(n, γ)26Mg by R-matrix analysis. Relevance to astrophysically important 22Ne(α, n)25Mg reaction.

doi: 10.1103/PhysRevC.89.055802
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2014GO18      Nucl.Data Sheets 119, 121 (2014)

M.E.Gooden, B.A.Fallin, S.W.Finch, J.H.Kelley, C.R.Howell, G.Rusev, A.P.Tonchev, W.Tornow, V.Stanislav

Partial Cross Sections of Neutron-Induced Reactions on natCu at En = 6, 8, 10, 12, 14, and 16 MeV for Oνββ Background Studies

NUCLEAR REACTIONS 63,65Cu(n, n'γ), E=6, 8, 10, 12, 14, 16 MeV; measured Eγ, Iγ(θ) using HPGe; deduced discrete level gated σ using γ ray angular distribution from Dicebox code; calculated discrete level gated σ using TALYS. Compared with ENDF/B-VII.1 and LANL data. Preliminary.

doi: 10.1016/j.nds.2014.08.034
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2014MA05      Phys.Rev.Lett. 112, 072501 (2014)

R.Massarczyk, R.Schwengner, F.Donau, S.Frauendorf, M.Anders, D.Bemmerer, R.Beyer, C.Bhatia, E.Birgersson, M.Butterling, Z.Elekes, A.Ferrari, M.E.Gooden, R.Hannaske, A.R.Junghans, M.Kempe, J.H.Kelley, T.Kogler, A.Matic, M.L.Menzel, S.Muller, T.P.Reinhardt, M.Roder, G.Rusev, K.D.Schilling, K.Schmidt, G.Schramm, A.P.Tonchev, W.Tornow, A.Wagner

Nuclear Deformation and Neutron Excess as Competing Effects for Dipole Strength in the Pygmy Region

NUCLEAR REACTIONS 124,128,132,134Xe(γ, X), E<12 MeV; measured reaction products, Eγ, Iγ. 124,128,132,134Xe; deduced photoabsorption σ, summed B(E1) strength, nuclear deformation in the region of the pygmy dipole resonance. Nuclear resonance fluorescence experiment, random-phase approximation calculations, comparison with available data.

doi: 10.1103/PhysRevLett.112.072501
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2014MA90      Phys.Rev. C 90, 054310 (2014)

R.Massarczyk, G.Rusev, R.Schwengner, F.Donau, C.Bhatia, M.E.Gooden, J.H.Kelley, A.P.Tonchev, W.Tornow

Magnetic dipole strength in 128Xe and 134Xe in the spin-flip resonance region

NUCLEAR REACTIONS 128,134Xe(polarized γ, γ'), E=6.0-9.6 MeV; measured Eγ, Iγ, γ(pol, θ) using HIγS facility at TUNL. 128,134Xe; deduced branching ratios and comparison with γ-ray cascade simulations, photoabsorption σ(E) for M1 and E1 transitions, B(M1), B(E1). Comparison of σ(E) with previous experimental results, predictions of phenomenological expressions, RIPL3 recommendations, triple-Lorentzian (TLO) model for E1 and the triple-Gaussian for M1, and QRPA calculations.

doi: 10.1103/PhysRevC.90.054310
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2014SA20      Phys.Rev. C 89, 035803 (2014)

A.Sauerwein, K.Sonnabend, M.Fritzsche, J.Glorius, E.Kwan, N.Pietralla, C.Romig, G.Rusev, D.Savran, L.Schnorrenberger, A.P.Tonchev, W.Tornow, H.R.Weller

Determination of the 142Ce(γ, n) cross section using quasi-monoenergetic Compton backscattered γ rays

NUCLEAR REACTIONS 142Ce(polarized γ, n), E=7.6=9.7 MeV; measured Eγ, Iγ, σ(E) at HIγS-TUNL facility. Activation method. Comparison with Hauser-Feshbach calculations using different γ-ray strength functions, and with predictions of Hartree-Fock-BCS model. Relevance to s-process branching at 141Ce, and elemental abundance.

doi: 10.1103/PhysRevC.89.035803
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2013BH03      Phys.Rev. C 87, 031601 (2013)

C.Bhatia, M.E.Gooden, W.Tornow, A.P.Tonchev

Ground-state and isomeric-state cross sections for 181Ta(n, 2n)180Ta between 8 and 15 MeV

NUCLEAR REACTIONS 181Ta(n, 2n)180Ta, E=8-15 MeV; measured Eγ, Iγ, σ(E) at TUNL facility. Comparison with previous experimental results, and with evaluated libraries ENSDF VII.1 and TENDL 2011.

doi: 10.1103/PhysRevC.87.031601
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2013GO19      Phys.Rev. C 88, 064308 (2013)

P.M.Goddard, N.Cooper, V.Werner, G.Rusev, P.D.Stevenson, A.Rios, C.Bernards, A.Chakraborty, B.P.Crider, J.Glorius, R.S.Ilieva, J.H.Kelley, E.Kwan, E.E.Peters, N.Pietralla, R.Raut, C.Romig, D.Savran, L.Schnorrenberger, M.K.Smith, K.Sonnabend, A.P.Tonchev, W.Tornow, S.W.Yates

Dipole response of 76Se above 4 MeV

NUCLEAR REACTIONS 76Se(polarized γ, γ'), E=4-9 MeV; measured Eγ, Iγ, γ(θ), integrated σ, γ(linear polarization) at HIγS facility at TUNL. 76Se; deduced levels, J, π, Γ, level half-lives, B(E1), B(M1), branching ratios. Comparison with theoretical calculations.

doi: 10.1103/PhysRevC.88.064308
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2013IS14      Phys.Lett. B 727, 361 (2013)

J.Isaak, D.Savran, M.Krticka, M.W.Ahmed, J.Beller, E.Fiori, J.Glorius, J.H.Kelley, B.Loher, N.Pietralla, C.Romig, G.Rusev, M.Scheck, L.Schnorrenberger, J.Silva, K.Sonnabend, A.P.Tonchev, W.Tornow, H.R.Weller, M.Zweidinger

Constraining nuclear photon strength functions by the decay properties of photo-excited states

NUCLEAR REACTIONS 11B, 130Te(γ, γ'), (γ, X), E<10 MeV; measured reaction products, Eγ, Iγ; deduced excited states π quantum numbers within 5.5-8.5 MeV region, γ-ray branching ratio, population intensity. Comparison with DICEBOX simulations, DHIPS and HIγS facilities at Darmstadt and TUNL, respectively.

doi: 10.1016/j.physletb.2013.10.040
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2013LO05      Nucl.Instrum.Methods Phys.Res. A723, 136 (2013)

B.Loher, V.Derya, T.Aumann, J.Beller, N.Cooper, M.Duchene, J.Endres, E.Fiori, J.Isaak, J.Kelley, M.Knorzer, N.Pietralla, C.Romig, D.Savran, M.Scheck, H.Scheit, J.Silva, A.Tonchev, W.Tornow, H.Weller, V.Werner, A.Zilges

The high-efficiency γ-ray spectroscopy setup γ3 at HIγS

NUCLEAR REACTIONS 32S(γ, γ'), E=8.125 MeV; measured reaction products, Eγ, Iγ; deduced precise value for the branching ratio for 1+ to 2+ transition.

doi: 10.1016/j.nima.2013.04.087
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2013RA23      Phys.Rev.Lett. 111, 112501 (2013)

R.Raut, A.P.Tonchev, G.Rusev, W.Tornow, C.Iliadis, M.Lugaro, J.Buntain, S.Goriely, J.H.Kelley, R.Schwengner, A.Banu, N.Tsoneva

Cross-Section Measurements of the 86Kr(γ, n) Reaction to Probe the s-Process Branching at 85Kr

NUCLEAR REACTIONS 86Kr, 197Au(γ, n), E<9.86-13 MeV; measured reaction products, Eγ, Iγ; deduced σ for direct and inverse reactions, 82,86Kr isotopic ratios. Comparison with HFB+QRPA calculations, TALYS code.

doi: 10.1103/PhysRevLett.111.112501
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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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2013RU01      Phys.Rev.Lett. 110, 022503 (2013)

G.Rusev, N.Tsoneva, F.Donau, S.Frauendorf, R.Schwengner, A.P.Tonchev, A.S.Adekola, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, W.Tornow, A.Wagner

Fine Structure of the Giant M1 Resonance in 90Zr

NUCLEAR REACTIONS 90Zr(γ, γ'), E=7-11 MeV; measured reaction products, Eγ, Iγ; deduced dipole excitations, 1+ states, fine structure of the giant M1 resonance, B(M1). Comparison with three-phonon QPM calculations.

doi: 10.1103/PhysRevLett.110.022503
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2013SC03      Phys.Rev. C 87, 024306 (2013)

R.Schwengner, R.Massarczyk, G.Rusev, N.Tsoneva, D.Bemmerer, R.Beyer, R.Hannaske, A.R.Junghans, J.H.Kelley, E.Kwan, H.Lenske, M.Marta, R.Raut, K.D.Schilling, A.Tonchev, W.Tornow, A.Wagner

Pygmy dipole strength in 86Kr and systematics of N=50 isotones

NUCLEAR REACTIONS 86Kr(γ, γ'), (polarized γ, γ'), E<11.2 MeV; measured Eγ, Iγ, γγ(θ), widths, azimuthal asymmetry, integrated σ. ELBE accelerator facility at HZDR, and HIγS facility at TUNL. 86Kr; deduced levels, PDR, J, π, branching ratios, photoabsorption σ(E), energy-weighted sums of photoabsorption σ. Comparison of photoabsorption σ with that from (γ, n) reaction.

NUCLEAR STRUCTURE 86Kr, 88Sr, 90Zr, 92Mo; calculated neutron skin thickness, B(E1), proton and neutron transition densities using QRPA calculations. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.87.024306
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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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2013UG01      Phys.Lett. B 719, 74 (2013)

C.Ugalde, B.DiGiovine, D.Henderson, R.J.Holt, K.E.Rehm, A.Sonnenschein, A.Robinson, R.Raut, G.Rusev, A.P.Tonchev

First determination of an astrophysical cross section with a bubble chamber: The 15N(α, γ)19F reaction

NUCLEAR REACTIONS 19F(γ, α), E<2 MeV; measured reaction products, Eα, Iα; deduced inverse reaction σ. R-matrix theory calculations.

doi: 10.1016/j.physletb.2012.12.068
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2012BE39      J.Phys.:Conf.Ser. 366, 012003 (2012)

J.Beller, J.Wagner, M.Ahmed, D.Deleanu, D.M.Filipescu, T.Glodariu, J.Isaak, J.H.Kelley, E.Kwan, N.Pietralla, R.Raut, C.Romig, G.Rusev, M.Scheck, S.C.Stave, A.Tonchev, W.Tornow, H.R.Weller, N.-V.Zamfir, M.Zweidinger

Energy separation of the 1+/1- parity doublet in 20Ne

NUCLEAR REACTIONS 28Si, 20Ne(polarized γ, γ'), E=11.26 MeV; measured reaction products, Eγ, Iγ. 20Ne; deduced integrated σ, energy separation, J, π of parity doublet states, effective nuclear enhancement factor.

doi: 10.1088/1742-6596/366/1/012003
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2012HA12      Phys.Rev. C 85, 044302 (2012)

S.L.Hammond, A.S.Adekola, C.T.Angell, H.J.Karwowski, E.Kwan, G.Rusev, A.P.Tonchev, W.Tornow, C.R.Howell, J.H.Kelley

Dipole response of 238U to polarized photons below the neutron separation energy

NUCLEAR REACTIONS 238U(polarized γ, γ'), E=2.0-6.2 MeV; measured Eγ, Iγ, γ(θ), γ(linear pol), integrated cross sections using HIγS facility at TUNL. 238U; deduced levels, J, π, multipolarity, widths, branching ratios, B(M1), B(E1), total γ-ray interaction cross section for E1. Systematics of E1 and M1 strengths for 232Th, 236,238U. Comparison with QRPA calculations.

doi: 10.1103/PhysRevC.85.044302
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2012MA31      Phys.Rev. C 86, 014319 (2012)

R.Massarczyk, R.Schwengner, F.Donau, E.Litvinova, G.Rusev, R.Beyer, R.Hannaske, A.R.Junghans, M.Kempe, J.H.Kelley, T.Kogler, K.Kosev, E.Kwan, M.Marta, A.Matic, C.Nair, R.Raut, K.D.Schilling, G.Schramm, D.Stach, A.P.Tonchev, W.Tornow, E.Trompler, A.Wagner, D.Yakorev

Electromagnetic dipole strength of 136Ba below the neutron separation energy

NUCLEAR REACTIONS 136Ba(γ, γ'), E at 7.0 MeV/c and 11.4 MeV/c; 136Ba(polarized γ, γ')E=4.7, 5.1, 5.6, 6.1, 6.5, 7.0, 7.5, 8.0, 8.4, 8.7, 9.0, 9.3 MeV; measured Eγ, Iγ, integrated σ(E), photoabsorption σ as a function of excitation energy, γ(θ), γ(lin pol) using Bremsstrahlung facility at ELBE, HZDR, and HIγS facility at TUNL. 136Ba; deduced levels, J, π, widths, pygmy dipole resonances, dipole strength in the quasicontinuum, enhancement of dipole strength. Statistical code used to simulate inelastic transitions and to determine the branching ratios of transitions to ground state. GEANT4 simulations. Comparison with previous experimental studies, and with theoretical calculations using quasiparticle random-phase approximation (QRPA) and relativistic quasiparticle time blocking approximation (RQTBA) approaches. Comparison of photoabsorption σ in 136,138Ba and 139La targets.

doi: 10.1103/PhysRevC.86.014319
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2012RA05      Phys.Rev.Lett. 108, 042502 (2012)

R.Raut, W.Tornow, M.W.Ahmed, A.S.Crowell, J.H.Kelley, G.Rusev, S.C.Stave, A.P.Tonchev

Photodisintegration Cross Section of the Reaction 4He(γ, p)3H between 22 and 30 MeV

NUCLEAR REACTIONS 4He(γ, p), E=22-30 MeV; measured reaction products; deduced σ and its uncertainties. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.108.042502
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2012RA21      J.Phys.:Conf.Ser. 337, 012048 (2012)

R.Raut, A.Banu, C.Iliadis, J.H.Kelley, G.Rusev, R.Schwengner, A.P.Tonchev, W.Tornow

Cross-Section Measurements of the 86Kr(γ, n) Reaction to Probe the s-Process Branching at 85Kr

NUCLEAR REACTIONS 86Kr(γ, n), E=9.970, 10.115, 10.170, 10.290, 10.360, 10.490, 11.005 MeV; measured En, In using 3He proportional counters; deduced σ; calculated σ using TALYS code with different parameter sets.

doi: 10.1088/1742-6596/337/1/012048
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2012TO08      Phys.Rev. C 85, 061001 (2012)

W.Tornow, J.H.Kelley, R.Raut, G.Rusev, A.P.Tonchev, M.W.Ahmed, A.S.Crowell, S.C.Stave

Photodisintegration cross section of the reaction 4He(γ, n)3He at the giant dipole resonance peak

NUCLEAR REACTIONS 4He(γ, n)3He, E=27.0, 27.5, 28.0 MeV; measured Eγ, Iγ, angle-integrated σ at GDR peak. Duke University electron storage ring facility. Comparison with previous experimental data, and with theoretical predictions by Trento group based on semirealistic central nucleon-nucleon (NN) potential of the MT I-III type.

doi: 10.1103/PhysRevC.85.061001
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2011IS01      Phys.Rev. C 83, 034304 (2011)

J.Isaak, D.Savran, M.Fritzsche, D.Galaviz, T.Hartmann, S.Kamerdzhiev, J.H.Kelley, E.Kwan, N.Pietralla, C.Romig, G.Rusev, K.Sonnabend, A.P.Tonchev, W.Tornow, A.Zilges

Investigation of low-lying electric dipole strength in the semimagic nucleus 44Ca

NUCLEAR REACTIONS 44Ca(polarized γ, γ'), E = 6-10, 9.9 MeV; measured Eγ, Iγ, γ(θ), integrated cross sections, and polarization asymmetry at DHIPS facility using S-DALINAC accelerator, and at HIγS facility. 44Ca; deduced levels, J, π, photon branching ratios, widths, B(E1) and B(M1) transition strengths. Comparisons with dipole strengths in 40,48Ca and with microscopic calculations within the extended theory of finite Fermi systems. Dependence of total E1 strength on neutron number.

doi: 10.1103/PhysRevC.83.034304
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2011KW01      Phys.Rev. C 83, 041601 (2011)

E.Kwan, G.Rusev, A.S.Adekola, F.Donau, S.L.Hammond, C.R.Howell, H.J.Karwowski, J.H.Kelley, R.S.Pedroni, R.Raut, A.P.Tonchev, W.Tornow

Discrete deexcitations in 235U below 3 MeV from nuclear resonance fluorescence

NUCLEAR REACTIONS 235U(γ, γ'), E=1.6-3.0 MeV; measured Eγ, Iγ, γγ-coin, integrated cross sections, and widths using HIγS facility. 235U; deduced levels, J, π, branching ratios. Comparison with quasiparticle random-phase approximation in deformed basis for dipole transitions.

doi: 10.1103/PhysRevC.83.041601
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2011RA08      Phys.Rev. C 83, 044621 (2011)

R.Raut, A.S.Crowell, B.Fallin, C.R.Howell, C.Huibregtse, J.H.Kelley, T.Kawano, E.Kwan, G.Rusev, A.P.Tonchev, W.Tornow, D.J.Vieira, J.B.Wilhelmy

Cross-section measurements of neutron-induced reactions on GaAs using monoenergetic beams from 7.5 to 15 MeV

NUCLEAR REACTIONS 69Ga(n, 2n)68Ga, 69Ga(n, p)69mZn, 71Ga(n, p)71mZn, 75As(n, 2n)74As, 75As(n, p)75Ge, E=7.5, 8.0, 8.5, 9.5, 10.2, 11.0, 11.5, 12.5, 13.25, 14.0, 14.5, 15.0 MeV; measured Eγ, Iγ; deduced half-lives and σ. 27Al(n, α)24Na, 197Au(n, 2n)196Au, E=7.5-14.5 MeV; measured σ and used as monitor reactions. Comparison of measured cross sections with previous data and statistical model calculations based on the Hauser-Feshbach formalism, using the TALYS and the COH3 codes.

doi: 10.1103/PhysRevC.83.044621
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2011RU15      J.Phys.:Conf.Ser. 312, 092053 (2011)

G.Rusev, A.S.Adekola, F.Donau, S.Frauendorf, S.L.Hammond, C.Huibregtse, J.H.Kelley, E.Kwan, R.Schwengner, A.P.Tonchev, W.Tornow, A.Wagner

Fine structure of the giant M1 resonance in 90Zr

NUCLEAR REACTIONS 90Zr(polarized γ, γ'), E=7-11 MeV; measured Eγ, Iγ(θ) using HPGe; deduced B(M1) fine structure; calculated B(M1) fine structure using shell model and QRPA.

doi: 10.1088/1742-6596/312/9/092053
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2011TO06      Phys.Lett. B 702, 121 (2011)

W.Tornow, H.J.Karwowski, J.H.Kelley, R.Raut, G.Rusev, S.C.Stave, A.P.Tonchev, A.Deltuva, A.C.Fonseca, L.E.Marcucci, M.Viviani, A.Kievsky, J.Golak, R.Skibinski, H.Witala, R.Schiavilla

Two-body photodisintegration of 3He between 7 and 16 MeV

NUCLEAR REACTIONS 3He(γ, p), E=7-16 MeV; measured reaction products, Ep, Ip; deduced σ. Comparison with theoretical calculations and experimental data.

doi: 10.1016/j.physletb.2011.06.080
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2011TO17      J.Phys.:Conf.Ser. 312, 092058 (2011)

A.P.Tonchev, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, R.Raut, G.Rusev, W.Tornow, N.Tsoneva

Coarse and Fine Structure of the Pygmy Dipole Resonance

NUCLEAR REACTIONS 138Ba(polarized γ, γ), (polarized γ, γ'), E=5.4, 7.2, 8.5 MeV; measured Eγ, Iγ(θ) using HPGe with nuclear resonance fluorescence; deduced σ, M1, E1 asymmetry, GDR, PDR photoabsorption σ, E1 ground-state γ transition strength, resonant-shape; calculated E1, M1 γ transition strength distribution using QPM.

doi: 10.1088/1742-6596/312/9/092058
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2010DE29      Phys.Rev. C 82, 025802 (2010)

R.J.de Boer, M.Wiescher, J.Gorres, R.Longland, C.Iliadis, G.Rusev, A.P.Tonchev

Photoexcitation of astrophysically important states in 26Mg. II. Ground-state-transition partial widths

NUCLEAR REACTIONS 26Mg(γ, γ'), E=10.5-11.7 MeV; measured Eγ, Iγ; deduced levels, J, π, resonances, branching ratios, total widths, partial widths. GEANT4 Monte-Carlo simulation of γ-ray spectra. Relevance to predictions of neutron production for the s-process in nucleosynthesis.

doi: 10.1103/PhysRevC.82.025802
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2010PI13      J.Phys.:Conf.Ser. 205, 012036 (2010)

N.Pietralla, T.C.Li, M.Fritzsche, M.W.Ahmed, D.Savran, A.P.Tonchev, W.Tornow, H.R.Weller, V.Werner

Spin and parity assignments to dipole excitations of the odd-mass nucleus 207Pb from nuclear resonance fluorescence experiments with linearly-polarized γ-ray beams

NUCLEAR REACTIONS Pb(polarized γ, γ'), E=5400-5700 keV; measured Eγ, Iγ(θ) using HIγS at DFELL. 206,207,208Pb deduced low-lying dipole-excited levels, J, π, E1 γ decay rate.

doi: 10.1088/1742-6596/205/1/012036
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2010TO01      Phys.Rev.Lett. 104, 072501 (2010)

A.P.Tonchev, S.L.Hammond, J.H.Kelley, E.Kwan, H.Lenske, G.Rusev, W.Tornow, N.Tsoneva

Spectral Structure of the Pygmy Dipole Resonance

NUCLEAR REACTIONS 138Ba(γ, γ), (γ, γ'), E ≈ below one-neutron separation energy; measured Eγ, Iγ; deduced σ, energy levels, B(E1), B(M1). Comparison with QPM calculations.

doi: 10.1103/PhysRevLett.104.072501
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2010TO09      Phys.Rev. C 82, 054620 (2010)

A.P.Tonchev, S.L.Hammond, C.R.Howell, C.Huibregtse, A.Hutcheson, J.H.Kelley, E.Kwan, R.Raut, G.Rusev, W.Tornow, T.Kawano, D.J.Vieira, J.B.Wilhelmy

Measurement of the 241Am(γ, n)240Am reaction in the giant dipole resonance region

NUCLEAR REACTIONS 241Am(γ, n), E=9.0-15.6 MeV; measured Eγ, Iγ, σ using HIγS facility. Giant dipole resonance region. Comparison with previous measurements and statistical nuclear-model calculations.

doi: 10.1103/PhysRevC.82.054620
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2009CH04      Ann.Nucl.Energy 36, 258 (2009)

M.B.Chadwick, R.C.Little, T.Kawano, P.Talou, D.Viera, M.Jandel, T.A.Bredeweg, M.C.White, A.P.Tonchev, J.A.Becker

Actinide ENDF/B-VII cross-section evaluations and validation testing

NUCLEAR REACTIONS 241Am(n, γ), E < 1000 MeV; 241Am(n, 2n), E < 20 MeV; analyzed cross sections. 239Pu(n, X), E=1.0 MeV; 238U(n, γ), E < 1.0 MeV; calculated cross sections.

doi: 10.1016/j.anucene.2008.11.011
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2009HU09      Phys.Rev. C 80, 014603 (2009)

A.Hutcheson, C.Angell, J.A.Becker, A.S.Crowell, D.Dashdorj, B.Fallin, N.Fotiades, C.R.Howell, H.J.Karwowski, T.Kawano, J.H.Kelley, E.Kwan, R.A.Macri, R.O.Nelson, R.S.Pedroni, A.P.Tonchev, W.Tornow

Cross sections for 238U(n, n'γ) and 238U(n, 2nγ) reactions at incident neutron energies between 5 and 14 MeV

NUCLEAR REACTIONS 238U(n, n'γ), (n, 2nγ), E=5-14 MeV; measured Eγ, yields, σ and excitation functions. Comparison with existing data and calculations using the GNASH and TALYS Hauser-Feshbach statistical-model codes.

doi: 10.1103/PhysRevC.80.014603
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2009LO06      Phys.Rev. C 80, 055803 (2009)

R.Longland, C.Iliadis, G.Rusev, A.P.Tonchev, R.J.de Boer, J.Gorres, M.Wiescher

Photoexcitation of astrophysically important states in 26Mg

NUCLEAR REACTIONS 26Mg(polarized γ, γ'), E=10.8, 11.0, 11.2, 11.4 MeV; measured Eγ, Iγ, and γγ(θ) at TUNL HIγS facility. 26Mg; deduced levels, J, π, and branching ratios. Comparison with Monte Carlo simulations. Implications for the reaction rates for 22Ne(α, γ)26Mg of astrophysical interest.

doi: 10.1103/PhysRevC.80.055803
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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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2009RU04      Phys.Rev. C 79, 047601 (2009)

G.Rusev, A.P.Tonchev, R.Schwengner, C.Sun, W.Tornow, Y.K.Wu

Multipole mixing ratios of transitions in 11B

NUCLEAR REACTIONS 11B(polarized γ, γ'), E=1-100 MeV; measured Eγ, Iγ, azimuthal asymmetries; deduced levels, mixing ratios.

doi: 10.1103/PhysRevC.79.047601
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2008EL09      Phys.Rev. C 78, 064303 (2008); Erratum Phys.Rev. C 88, 029903 (2013)

E.Elhami, J.N.Orce, M.Scheck, S.Mukhopadhyay, S.N.Choudry, M.T.McEllistrem, S.W.Yates, C.Angell, M.Boswell, B.Fallin, C.R.Howell, A.Hutcheson, H.J.Karwowski, J.H.Kelley, Y.Parpottas, A.P.Tonchev, W.Tornow

Experimental study of the low-lying structure of 94Zr with the (n, n'γ) reaction

NUCLEAR REACTIONS 94Zr(n, n'γ), E=2.5-4.0 MeV; measured Eγ, Iγ, γγ-coin, angular distributions, half-lives by Doppler shift attenuation; deduced levels, J, π, multipolarities, mixing ratios, B(M1), B(E2).90,92,96,98,100,102Zr, 96Ru, 94,96Mo; systematics. Comparison with IBA and shell model calculations.

doi: 10.1103/PhysRevC.78.064303
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2008TO06      Phys.Rev. C 77, 054610 (2008)

A.P.Tonchev, C.T.Angell, M.Boswell, A.S.Crowell, B.Fallin, S.Hammond, C.R.Howell, A.Hutcheson, H.J.Karwowski, J.H.Kelley, R.S.Pedroni, W.Tornow, J.A.Becker, D.Dashdorj, J.Kenneally, R.A.Macri, M.A.Stoyer, C.Y.Wu, E.Bond, M.B.Chadwick, J.Fitzpatrick, T.Kawano, R.S.Rundberg, A.Slemmons, D.J.Vieira, J.B.Wilhelmy

Measurement of the 241Am(n, 2n) reaction cross section from 7.6 MeV to 14.5 MeV

NUCLEAR REACTIONS 241Am(n, 2n), E=7.6-14.5 MeV; measured Eγ, Iγ, neutron time-of-flight spectra, σ, excitation functions. Comparison with evaluated data in ENDF/B-VII and JENDL-3.3.

doi: 10.1103/PhysRevC.77.054610
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14172.


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


2006SA03      Phys.Rev. C 73, 015801 (2006)

A.Sabourov, M.W.Ahmed, M.A.Blackston, A.S.Crowell, C.R.Howell, B.A.Perdue, K.Sabourov, A.Tonchev, H.R.Weller, R.M.Prior, M.C.Spraker

Astrophysical S factor for the 7Li(d, n0)8Be and 7Li(d, n1)8Be reactions

NUCLEAR REACTIONS 7Li(d, n), E=45, 60, 80 keV; measured neutron spectra, σ(E); deduced integrated yields, astrophysical S-factor.

doi: 10.1103/PhysRevC.73.015801
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1408.


2006SA49      Phys.Rev.C 74, 064611 (2006)

A.Sabourov, M.W.Ahmed, M.A.Blackston, A.S.Crowell, C.R.Howell, K.Joshi, S.O.Nelson, B.A.Perdue, K.Sabourov, A.Tonchev, H.R.Weller, R.M.Prior, M.C.Spraker, B.Braizinha, N.Kalantar-Nayestanaki

The 7Li(d(pol), n0)8Be and 7Li(d(pol), n1)8Be reactions below 160 keV

NUCLEAR REACTIONS 7Li(polarized d, n), E=80, 130, 160 keV; measured σ(E, θ), analyzing powers; deduced transition matrix elements. Finite-range DWBA calculations, coupled reaction channels calculations.

doi: 10.1103/PhysRevC.74.064611
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1529.


2005SA15      Phys.Rev. C 71, 034304 (2005)

D.Savran, S.Muller, A.Zilges, M.Babilon, M.W.Ahmed, J.H.Kelley, A.Tonchev, W.Tornow, H.R.Weller, N.Pietralla, J.Li, I.V.Pinayev, Y.K.Wu

Parity assignments in 172, 174Yb using polarized photons and the K quantum number in rare earth nuclei

NUCLEAR REACTIONS 172,174Yb(polarized γ, γ'), E=2930, 3005, 3550 keV; measured Eγ, Iγ, asymmetries. 172,174Yb levels deduced π. Parity and branching ratio systematics discussed.

doi: 10.1103/PhysRevC.71.034304
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2004FR30      Phys.Rev. C 70, 044317 (2004)

C.Fransen, N.Pietralla, A.P.Tonchev, M.W.Ahmed, J.Chen, G.Feldman, U.Kneissl, J.Li, V.N.Litvinenko, B.Perdue, I.V.Pinayev, H.H.Pitz, R.Prior, K.Sabourov, M.Spraker, W.Tornow, H.R.Weller, V.Werner, Y.K.Wu, S.W.Yates

Parity assignments to strong dipole excitations of 92Zr and 96Mo

NUCLEAR REACTIONS 92Zr(polarized γ, γ'), E=3.47, 3.64 MeV; 96Mo(γ, γ'), E=2.80, 3.30, 3.43, 3.60, 3.90 MeV; measured Eγ, Iγ, azimuthal asymmetry. 92Zr, 96Mo levels deduced π.

doi: 10.1103/PhysRevC.70.044317
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Data from this article have been entered in the XUNDL database. For more information, click here.


2004PE24      Phys.Rev. C 70, 064305 (2004)

B.A.Perdue, M.W.Ahmed, A.P.Tonchev, H.R.Weller, G.Feldman, V.N.Litvinenko, I.V.Pinayev, B.E.Norum, R.M.Prior, M.C.Spraker, B.D.Sawatzky

Compton scattering of polarized γ rays by 16O for Eγ = 25-40 MeV

NUCLEAR REACTIONS 16O(polarized γ, γ'), E=25-40 MeV; measured polarization asymmetries; deduced resonance features.

doi: 10.1103/PhysRevC.70.064305
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2004PR09      Phys.Rev. C 70, 055801 (2004)

R.M.Prior, M.C.Spraker, A.M.Amthor, K.J.Keeter, S.O.Nelson, A.Sabourov, K.Sabourov, A.Tonchev, M.Ahmed, J.H.Kelley, D.R.Tilley, H.R.Weller, H.M.Hofmann

Energy dependence of the astrophysical S factor for the 6Li(p, γ)7Be reaction

NUCLEAR REACTIONS 6Li(polarized p, γ), E=80, 95, 110, 120, 130 keV; measured Eγ, Iγ, analyzing power; deduced energy dependence of astrophysical S-factor.

doi: 10.1103/PhysRevC.70.055801
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1136.


2004SA61      Phys.Rev. C 70, 064601 (2004)

K.Sabourov, M.W.Ahmed, R.S.Canon, B.Crowley, K.Joshi, J.H.Kelley, S.O.Nelson, B.A.Perdue, E.C.Schreiber, A.Sabourov, A.Tonchev, H.R.Weller, E.A.Wulf, R.M.Prior, M.C.Spraker, H.M.Hofmann, M.Trini

Experimental and theoretical study of the 2H(d(pol), γ)4He reaction below Ec.m.=60keV

NUCLEAR REACTIONS 2H(polarized d, γ), E<115 keV; measured Eγ, Iγ, σ(θ), Ay(θ), T20(θ); deduced transition matrix elements. Comparison with resonating group model predictions.

doi: 10.1103/PhysRevC.70.064601
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1493.


2003NE17      Phys.Rev. C 68, 065804 (2003)

S.O.Nelson, M.W.Ahmed, B.A.Perdue, K.Sabourov, A.L.Sabourov, A.P.Tonchev, R.M.Prior, M.Spraker, H.R.Weller

Analyzing power measurement for the 14N(p(pol), γ)15O reaction at astrophysically relevant energies

NUCLEAR REACTIONS 14N(polarized p, γ), E=270 MeV; measured σ(θ), Ay(θ); deduced astrophysical S-factors. Comparison with direct-capture-plus-resonance model predictions.

doi: 10.1103/PhysRevC.68.065804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0996.


2003TO21      Phys.Rev. C 68, 045803 (2003)

A.P.Tonchev, S.O.Nelson, K.Sabourov, B.T.Crowley, K.Joshi, H.R.Weller, J.H.Kelley, R.M.Prior, M.Spraker, N.Kalantar-Nayestanaki

The 10B(p(pol), γ)11C reaction at astrophysically relevant energies

NUCLEAR REACTIONS 10B(polarized p, γ), E=100, 130, 160 keV; measured Eγ, Iγ, σ(E, θ), Ay(E, θ); deduced astrophysical S-factors, subthreshold resonance. Direct capture model analysis.

doi: 10.1103/PhysRevC.68.045803
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1036.


2002PI02      Phys.Rev.Lett. 88, 012502 (2002)

N.Pietralla, Z.Berant, V.N.Litvinenko, S.Hartman, F.F.Mikhailov, I.V.Pinayev, G.Swift, M.W.Ahmed, J.H.Kelley, S.O.Nelson, R.Prior, K.Sabourov, A.P.Tonchev, H.R.Weller

Parity Measurements of Nuclear Levels using a Free-Electron-Laser Generated γ-Ray Beam

NUCLEAR REACTIONS 138Ba(polarized γ, γ'), E ≈ 5.62 MeV; measured Eγ, Iγ, azimuthal asymmetries. 138Ba levels deduced π. Nuclear resonance fluorescence, free-electron laser, comparisons with previous results.

doi: 10.1103/PhysRevLett.88.012502
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2002PI08      Phys.Rev. C65, 047305 (2002); Erratum Phys.Rev. C65, 069901 (2002)

N.Pietralla, V.N.Litvinenko, S.Hartman, F.F.Mikhailov, I.V.Pinayev, G.Swift, M.W.Ahmed, J.H.Kelley, S.O.Nelson, R.Prior, K.Sabourov, A.P.Tonchev, H.R.Weller

Identification of the Jπ = 1- Two-Phonon State of 88Sr

NUCLEAR REACTIONS 88Sr(polarized γ, γ'), E=4.74, 5.02, 7.54 MeV; measured Eγ, Iγ, azimuthal asymmetry. 88Sr level deduced J, π.

doi: 10.1103/PhysRevC.65.047305
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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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0629.


2001GA57      Bull.Rus.Acad.Sci.Phys. 65, 121 (2001)

Yu.P.Gangrsky, P.Zuzaan, N.N.Kolesnikov, V.G.Lukashek, A.P.Tonchev

Isomeric Ratios in Crossing (nγ) and (γn) Reactions

NUCLEAR REACTIONS 74Ge, 80Se, 84Sr, 108Pd, 114Cd, 112,122Sn, 120,126,128Te, 130,132Ba, 136,138Ce, 196Pt, 196Hg(n, γ), E=thermal; 76Ge, 82Se, 86Sr, 110Pd, 116Cd, 114,124Sn, 122,128,130Te, 132,134Ba, 138,140Ce, 198Pt, 198Hg(γ, n), E=25 MeV bremsstrahlung; measured isomeric cross section ratios. Comparison with statistical model calculations.

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41414.


2001NE15      Phys.Rev. C64, 065804 (2001)

C.D.Nesaraja, C.R.Brune, B.T.Crowley, J.H.Kelley, S.O.Nelson, R.M.Prior, K.Sabourov, D.R.Tilley, A.Tonchev, H.R.Weller

Ratio of S Factors for (p, γ) Reactions on 12C and 13C at Astrophysically Relevant Energies

NUCLEAR REACTIONS 12,13C(p, γ), E < 160 keV; measured σ; deduced S-factor ratio. Comparison with model predictions.

doi: 10.1103/PhysRevC.64.065804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0871.


2000TO02      Appl.Radiat.Isot. 52, 873 (2000)

A.P.Tonchev, J.F.Harmon

Excitation of the 180mTa Isomer in (γ, n) Reactions and Its Astrophysical Relevance

NUCLEAR REACTIONS 181Ta(γ, n), E=7-13 MeV bremsstralung; measured ground-state yield; deduced isomer production σ. 197Au(γ, n), E=7-13 MeV bremsstralung; measured ground-state yield. Activation technique.

doi: 10.1016/S0969-8043(99)00132-3
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2000TS01      Phys.Rev. C61, 044303 (2000)

N.Tsoneva, Ch.Stoyanov, Yu.P.Gangrsky, V.Yu.Ponomarev, N.P.Balabanov, A.P.Tonchev

Population of Isomers in the Decay of the Giant Dipole Resonance

NUCLEAR REACTIONS 138Ba, 140Ce, 142Nd, 144Sm(γ, n), E=10-26 MeV bremsstrahlung; measured σ, isomeric ratios. Comparison with quasiparticle-phonon model calculations.

doi: 10.1103/PhysRevC.61.044303
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1999GA45      Yad.Fiz. 62, No 10, 1733 (1999); Phys.Atomic Nuclei 62, 1615 (1999)

Yu.P.Gangrsky, P.Zuzaan, N.N.Kolesnikov, V.G.Lukashek, A.P.Tonchev

Isomeric Ratios in (γ, p) Reactions at Giant-Dipole-Resonance Energies

NUCLEAR REACTIONS 98Mo, 100Ru, 118,120,122Sn(γ, p), E=19-24 MeV bremsstrahlung; measured yields, isomeric ratios. Activation technique, comparison with statistical model calculations.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0616.


1999TO05      Nucl.Instrum.Methods Phys.Res. A422, 532 (1999)

A.P.Tonchev, Yu.P.Gangrsky, A.G.Belov

New Candidates for High Spin Isomeric Targets

NUCLEAR REACTIONS 180mTa(γ, γ')180Ta, 180Hf(γ, γ')180mHf, E=6.5, 7.0 MeV bremsstrahlung; measured integral σ. Ag, Ho(n, γ)108mAg/166mHo, E=reactor; measured Eγ, Iγ. Production of isomeric targets using neutron-induced reactions discussed.

NUCLEAR STRUCTURE 108Ag, 166Ho, 178Hf, 180Ta, 186Re, 242Am; compiled, evaluated candidates for high-spin isomeric targets.

doi: 10.1016/S0168-9002(98)01080-8
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1998TO24      Phys.Rev. C58, 2851 (1998)

A.P.Tonchev, Yu.P.Gangrsky, A.G.Belov, V.E.Zhuchko

Deformation on Isomeric Excitation of Eu Isotopes in (γ, n) and (n, γ) Reactions

NUCLEAR REACTIONS 151,153Eu(n, γ), E=thermal; 151,153Eu(γ, n), E=12-22 MeV; measured yields, isomeric ratios; deduced deformation effect. Activation technique.

doi: 10.1103/PhysRevC.58.2851
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset41339.


1997BE58      Bull.Rus.Acad.Sci.Phys. 61, 312 (1997)

A.G.Belov, Yu.P.Gangrsky, P.Zuzaan, A.P.Tonchev

Excitation of High-Spin 180Hf Isomer and De-Excitation of High-Spin 180Ta Isomer in Inelastic Scattering of γ-Quanta

NUCLEAR REACTIONS, ICPND 180Hf, 180mTa(γ, γ'), E=6-8 MeV bremsstrahlung; measured isomer production σ(E). 180Hf, 180Ta deduced isomer excitation, de-excitation mechanisms. Activation technique.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0857.


1997BE67      Yad.Fiz. 60, No 11, 1940 (1997); Phys.Atomic Nuclei 60, 1773 (1997)

A.G.Belov, Yu.P.Gangrsky, V.E.Zhuchko, A.P.Tonchev

Excitation of Isomeric States in (γ, n) and (n, γ) Reactions on Eu Isotopes

NUCLEAR REACTIONS 151,153Eu(n, γ), E=thermal; 151,153Eu(γ, n), E=13-22 MeV bremsstrahlung; measured Eγ, Iγ, yields, isomeric ratios; deduced deformation effects. Activation technique.


1997BE76      Hyperfine Interactions 107, 167 (1997)

A.G.Belov, Yu.P.Gangrsky, A.P.Tonchev, P.Zuzaan

Excitation of the High-Spin 180Hf Isomer and De-Excitation of the 180Ta Isomer in (γ, γ') Reactions

NUCLEAR REACTIONS 180Hf, 180Ta(γ, γ')180mHf/180Ta, E=6-8 MeV bremsstrahlung; measured yields; deduced σ, isomer excitation mechanism.

doi: 10.1023/A:1012011923772
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1996BE30      Yad.Fiz. 59, No 3, 389 (1996); Phys.Atomic Nuclei 59, 367 (1996)

A.G.Belov, Yu.P.Gangrsky, A.P.Tonchev, N.P.Balabanov, Kh.G.Khristov

Measurement of Isomeric Ratios in the Reactions (γ, n) on Barium Isotopes in the Giant-Dipole-Resonance Region

NUCLEAR REACTIONS, ICPND Ba(γ, n), E=1.8 MeV bremsstrahlung; measured Eγ, Iγ; deduced 137m,135m,133m,131m,129mBa yield, isomeric ratios. 130,132,134,136,138Ba deduced GDR excitation σ, resonance parameters.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0674.


1996BE32      Yad.Fiz. 59, No 4, 585 (1996); Phys.Atomic Nuclei 59, 553 (1996)

A.G.Belov, Yu.P.Gangrsky, A.P.Tonchev, N.P.Balabanov

Excitation of Isomeric 1h11/2 States in the Reactions (γ, n)

NUCLEAR REACTIONS, ICPND 108,110Pd, 116Cd, 118Sn, 120,122,124,130Te, 134,136,138Ba, 138,140Ce, 142Nd, 144Sm(γ, n), E ≤ 25 MeV bremsstrahlung; measured σ, isomer production σ, ratio; deduced nucleon number, excitation energy dependences.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0527.


1996GA43      Fiz.Elem.Chastits At.Yadra 27, 1043 (1996); Phys.Part.Nucl. 27, 428 (1996)

Yu.P.Gangrsky, A.P.Tonchev, N.P.Balabanov

Excitation of Isomeric States in Photonuclear Reactions

NUCLEAR REACTIONS 77Se, 79Br, 87Sr, 113,115In, 176Lu, 191Ir, 197Au, 180Hf, 190Os, 204Pb(γ, γ'), E<15 MeV; 108,110Pd, 116Cd, 118,124Sn, 120,122,124,130Te, 136Xe, 130,132,134,136,138Ba, 138,140Ce, 142Nd, 144Sm, 74Se, 86,88Sr, 90Zr, 92Mo, 198Pt, 196,198Hg, 208Pb(γ, n), E<30 MeV; analyzed isomer excitation σ; deduced isomer population mechanism features.


1991AN07      Yad.Fiz. 53, 14 (1991); Sov.J.Nucl.Phys. 53, 9 (1991)

A.D.Antonov, N.P.Balabanov, Yu.P.Gangrsky, F.G.Kondev, S.G.Marinova, A.P.Tonchev, Kh.G.Khristov, V.D.Cholakov

Measurement of the Integrated Cross Sections for the (γ, α) Reaction in the Region of the Giant Dipole Resonance

NUCLEAR REACTIONS, ICPND 51V, 65Cu, 71Ga, 76Ge, 96Zr, 93Nb, 92Mo, 115In, 143,145Nd, 170Er, 181Ta, 207Pb(γ, α), E=23 MeV bremsstrahlung; measured yields, σ. Activation method, statistical model analysis.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0893.


1991AN22      Izv.Akad.Nauk SSSR, Ser.Fiz. 55, 2260 (1991); Bull.Acad.Sci.USSR, Phys.Ser. 55, No.11, 176 (1991)

A.D.Antonov, N.P.Balabanov, Yu.P.Gangrsky, F.G.Kondev, S.G.Marinova, A.P.Tonchev, Kh.G.Khristov

Excitation Function of the Reaction (γα) in the Region of a Giant Dipole Resonance

NUCLEAR REACTIONS, ICPND 51V, 65Cu, 76Ge, 96Zr, 93Nb, 170Er(γ, α), E=16-25 MeV bremsstrahlung; measured σ(E), γ yields. Statistical model analysis including isospin.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0894.


1991TO10      J.Radioanal.Nucl.Chem. 155, 299 (1991)

A.P.Tonchev, F.G.Kondev, Kh.G.Khristov, Yu.P.Gangrsky, N.P.Balabanov, V.D.Tcholakov

Isomeric Yield Ratio of 134I in Photofission of 232Th and 238U

NUCLEAR REACTIONS, ICPND 232Th, 238U(γ, F)134I, E=25 MeV bremsstrahlung; measured fission product isomeric yield ratios. Radiochemical techniques, γ-spectrometry.

doi: 10.1007/BF02163877
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetM0983.


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Note: The following list of authors and aliases matches the search parameter A.Tonchev: , A.O.TONCHEV, A.P.TONCHEV