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NSR database version of April 11, 2024.

Search: Author = P.Mohr

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2023GY01      Phys.Rev. C 107, 025803 (2023)

Gy.Gyurky, P.Mohr, A.Angyal, Z.Halasz, G.G.Kiss, Zs.Matyus, T.N.Szegedi, T.Szucs, Zs.Fulop

Cross section measurement of the 144Sm(α, n)147Gd reaction for studying the α-nucleus optical potential at astrophysical energies

NUCLEAR REACTIONS 144Sm(α, n)147Gd, E=13-20 MeV; measured Eγ Iγ; deduced total σ(E), astrophysical S-factor, constraints on α-nucleus potential. 144Sm(α, X), E=7.5-20 MeV; analyzed experimental information on σ, deduced contribution of different channels to the σ and S-factor. 144Sm(α, γ), E=10-13 MeV; calculated S-factor, astrophysical reaction rate using derived optical model parameters. Activation method. Comparison with statistical model calculations, other experimental data and data from REACLIB AND STARLIB. Targets were irradiated at K20 cyclotron accelerator of Atomki and γ-rays from decay was measured by thin HPGe (LEPS).

doi: 10.1103/PhysRevC.107.025803
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2023JA08      Phys.Rev.Lett. 845, 112701 (2023)

H.Jayatissa, M.L.Avila, K.E.Rehm, P.Mohr, Z.Meisel, J.Chen, C.R.Hoffman, J.Liang, C.Muller-Gatermann, D.Neto, W.J.Ong, A.Psaltis, D.Santiago-Gonzalez, T.L.Tang, C.Ugalde, G.Wilson

Study of the 22Mg Waiting Point Relevant for X-Ray Burst Nucleosynthesis via the 22Mg(α, p)25Al Reaction

NUCLEAR REACTIONS 4He(22Mg, p), E=74 MeV; measured reaction products, Ep, Ip; deduced σ, reaction rates. Comparison with calculations. MUlti-Sampling Ionization Chamber (MUSIC) detector, the Argonne Tandem Linac Accelerator System (ATLAS) at Argonne National Laboratory.

doi: 10.1103/PhysRevLett.131.112701
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2023MO16      J.Phys.(London) G50, 075103 (2023)

P.Mohr

α-decay half-life of 212Po at stellar temperatures

RADIOACTIVITY 212Po(α); analyzed available data; deduced moderate reduction of the T1/2 of less than one order of magnitude up to 2 GK.

doi: 10.1088/1361-6471/acd39a
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2023MO20      J.Phys.(London) G50, 098002 (2023)

P.Mohr

Comment on "Alpha decay of thermally excited nuclei"

RADIOACTIVITY 212Po(α); calculated T1/2 as a function of temperature within the statistical approach; deduced only a moderate enhancement of α-decay rate at high temperatures.

doi: 10.1088/1361-6471/ace63a
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2023TS04      Phys.Rev. C 107, 035808 (2023)

A.Tsantiri, A.Palmisano-Kyle, A.Spyrou, P.Mohr, H.C.Berg, P.A.DeYoung, A.C.Dombos, P.Gastis, E.C.Good, C.M.Harris, S.N.Liddick, S.M.Lyons, O.Olivas-Gomez, G.Owens-Fryar, J.Pereira, A.L.Richard, A.Simon, M.K.Smith, R.G.T.Zegers

Cross-section measurement of the 82Kr(p, γ)83Rb reaction in inverse kinematics

NUCLEAR REACTIONS 1H(82Kr, γ)83Rb, E=3.1, 3.4, 3.7 MeV/nucleon; measured Eγ, Iγ, γ-sum, total absorption spectra; deduced σ(E), astrophysical S-factor. Comparison to NON-SMOKER and TALYS statistical model calculations. Hydrogen gas cell surrounded by the Summing NaI(Tl) (SuN) detector at ReA reaccelerator facility (NSCL).

doi: 10.1103/PhysRevC.107.035808
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2022JA08      Phys.Rev. C 105, L042802 (2022)

H.Jayatissa, M.L.Avila, K.E.Rehm, R.Talwar, P.Mohr, K.Auranen, J.Chen, D.A.Gorelov, C.R.Hoffman, C.L.Jiang, B.P.Kay, S.A.Kuvin, D.Santiago-Gonzalez

First direct measurement of the 13N(α, p)16O reaction relevant for core-collapse supernovae nucleosynthesis

NUCLEAR REACTIONS 4He(13N, p), E=34.6 MeV; measured energies and yields of reaction products; deduced σ(Ε) in the range E(cm)=3.26–6.02 MeV, astrophysical S-factor. 4He(13N, p), T=0.8-10.0 GK; deduced astrophysical reaction rates. Comparison to other experimental data, TALYS calculations and data from REACLIB. MUlti-Sampling Ionization Chamber (MUSIC) detector filled with He-Kr gas mixture at ATLAS (ANL).

doi: 10.1103/PhysRevC.105.L042802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2747.


2022KI15      Phys.Rev. C 106, 015802 (2022)

G.G.Kiss, P.Mohr, Gy.Gyurky, T.Szucs, L.Csedreki, Z.Halasz, Zs.Fulop, E.Somorjai

High-precision 144Sm (α, α) 144Sm scattering at low energies and the rate of the 144Sm (α, γ) 148Gd reaction

NUCLEAR REACTIONS 144Sm(α, α), E=16.13, 18.07, 19.87 MeV; measured Eα, Iα, angular distribution; deduced σ(θ) normalized to Rutherford cross section, parameters of the optical potentials. 144Sm(α, X), 144Sm(α, γ), E(cm)=5-20 MeV; deduced σ(E), astrophysical S-factor using derived α-OMP parameters. Comparison to other experimental data and calculations performed with different OMP parameters. Array of 7 ion-implanted silicon detectors at cyclotron laboratory of ATOMKI, Debrecen.

doi: 10.1103/PhysRevC.106.015802
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2022KU11      Phys.Rev. C 105, 044606 (2022)

R.Kumar, S.Rana, M.Bhuyan, P.Mohr

Fusion cross section of α-induced reactions for heavy target nuclei

NUCLEAR REACTIONS 208Pb, 209Bi, 235,238U(α, X), E=15-30 MeV; calculated fusion σ(E), fusion barrier, astrophysical S-factor. Nonrelativistic Skryme-Hartree-Fock (SHF) and the relativistic mean-field (RMF) formalisms for the NL3* parameter set along with density-dependent M3Y and relativistic R3Y effective potentials. Comparison to available experimental data.

NUCLEAR STRUCTURE 208Pb, 209Bi, 235,238U; calculated radial distributions of total density. Skyrme-Hartree-Fock (SHF) and relativistic mean-field (RMF) formalisms.

doi: 10.1103/PhysRevC.105.044606
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2022ON02      Phys.Rev. C 105, 055803 (2022)

W.-J.Ong, M.L.Avila, P.Mohr, K.E.Rehm, D.Santiago-Gonzalez, J.Chen, C.R.Hoffman, Z.Meisel, F.Montes, J.Pereira

Measurement of the 100Mo (α, xn) cross section at weak $r$-process energies

NUCLEAR REACTIONS 4He(100Mo, xn);E(cm)=8.9-13.2 MeV; measured reaction products; deduced σ(E). 4He(100Mo, 2n), E=11.84-13.17; deduced σ(E).Comparison to other experimental data and Hauser-Feschbach calculations. The MUSIC detector at Argonne Tandem Linac Accelerator System (ATLAS) facility.

doi: 10.1103/PhysRevC.105.055803
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2768.


2021MO22      At.Data Nucl.Data Tables 142, 101453 (2021)

P.Mohr, Z.Fulop, Gy.Gyurky, G.G.Kiss, T.Szucs, A.Arcones, M.Jacobi, A.Psaltis

Astrophysical reaction rates of α-induced reactions for nuclei with 26 ≤ Z ≤ 83 from the new Atomki-V2 α-nucleus potential

NUCLEAR REACTIONS 88Kr, 188Sm(α, X), E(cm)<15 MeV; calculated astrophysical reaction rates using new Atomki-V2 α-nucleus potential and TALYS nuclear model code.

doi: 10.1016/j.adt.2021.101453
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2021RA22      Phys.Rev. C 104, L042801 (2021)

J.S.Randhawa, R.Kanungo, J.Refsgaard, P.Mohr, T.Ahn, M.Alcorta, C.Andreoiu, S.S.Bhattacharjee, B.Davids, G.Christian, A.A.Chen, R.Coleman, P.E.Garrett, G.F.Grinyer, E.G.Fuakye, G.Hackman, J.Hollett, R.Jain, K.Kapoor, R.Krucken, A.Laffoley, A.Lennarz, J.Liang, Z.Meisel, B.Nikhil, A.Psaltis, A.Radich, M.Rocchini, N.Saei, M.Saxena, M.Singh, C.Svensson, P.Subramaniam, A.Talebitaher, S.Upadhyayula, C.Waterfield, J.Williams, M.Williams

First direct measurement of 59Cu(p, α)56Ni: step towards constraining the Ni-Cu cycle in the cosmos

NUCLEAR REACTIONS 1H(59Cu, α)56Ni, E=8.5 MeV/nucleon, [secondary 59Cu beam from Nb(p, X), E=480 MeV at the TRIUMF cyclotron, followed by re-acceleration of 59Cu beam by ISAC-II superconducting LINAC, solid H2 target]; measured protons and α particles, angle-integrated σ using thick single-sided silicon strip detectors and a layer of thick CsI(Tl) detectors; deduced ratio of integrated σ to total σ, exclusive population of the ground state of 56Ni in (p, α). Comparison with Hauser-Feshbach based statistical model calculations; deduced overestimation of (p, α) cross section in this region. Discussed impact on νp process and x-ray bursts (XRBs). Relevance to Ni-Cu cycle in nucleosynthesis, with competing 59Cu(p, α)56Ni and 59Cu(p, γ)60Zn reactions.

doi: 10.1103/PhysRevC.104.L042801
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2696.


2021SZ02      Phys.Rev. C 104, 035804 (2021)

T.N.Szegedi, G.G.Kiss, P.Mohr, A.Psaltis, M.Jacobi, G.G.Barnafoldi, T.Szucs, Gy.Gyurky, A.Arcones

Activation thick target yield measurement of 100Mo(α, n)103Ru for studying the weak r-process nucleosynthesis

NUCLEAR REACTIONS 100Mo(α, n)103Ru, E=7.0-13.0 MeV; measured Eγ, Iγ, thick target σ(E) by activation technique at the Institute for Nuclear Research (Atomki); deduced recommended astrophysical rate at T9=1.0-5.0, elemental abundances for the MC13 trajectory using α-nucleus optical model potentials (α-OMPs) with Atomki-V2 potential to model the nucleosynthesis scenario. 95,97Ru, 95Tc; observed γ rays in the spectrum.

doi: 10.1103/PhysRevC.104.035804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD4422.


2020MO19      Phys.Rev. C 101, 049801 (2020)

P.Mohr

Comment on "Observation of annual modulation induced by γ rays from (α, γ) reactions at the Soudan Underground Laboratory'"

NUCLEAR REACTIONS 16O(α, γ), E=5.304, 8.784 MeV from the α decays of 210Po and 212Po, daughter products of α decays of Rn isotopes; calculated Eγ, Iγ; discussed implications for annual modulation of events registered at Soudan Underground Laboratory (SUL) from 220,222Rn decay, in connection with the reported measurements by 2017Ti10, and need for an improved analysis of γ-ray fluxes for the understanding of the background contributions at SUL.

doi: 10.1103/PhysRevC.101.049801
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2020MO22      Eur.Phys.J. A 56, 127 (2020)

P.Mohr

Yrast band in the heavy N=Z nucleus 88Ru: α-cluster approach

doi: 10.1140/epja/s10050-020-00145-5
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2020MO23      Phys.Rev.Lett. 124, 252701 (2020)

P.Mohr, Z.Fulop, G.Gyurky, G.G.Kiss, T.Szucs

Successful Prediction of Total α-Induced Reaction Cross Sections at Astrophysically Relevant Sub-Coulomb Energies Using a Novel Approach

NUCLEAR REACTIONS 176W(α, γ), E<200 keV; analyzed available data; deduced astrophysical reaction rates, S-factor.

doi: 10.1103/PhysRevLett.124.252701
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2019MO19      Phys.Rev. C 99, 055807 (2019)

P.Mohr

Direct capture cross section of 9Be(n, γ)10Be

NUCLEAR REACTIONS 9Be(n, γ), E=0.001-3 MeV; calculated σ(E), radial wave functions of resonance states, and astrophysical reaction rate at T9=0.001-10.0 using direct capture model. Comparison with experimental data.

doi: 10.1103/PhysRevC.99.055807
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2019MO23      Int.J.Mod.Phys. E28, 1950029 (2019)

P.Mohr

Cross-sections at sub-Coulomb energies: Full optical model versus barrier transmission for 40Ca + α

NUCLEAR REACTIONS 40Ca(α, p), E(cm)<10 MeV; calculated σ. Comparison with available data.

doi: 10.1142/S0218301319500290
Citations: PlumX Metrics


2019SZ04      Phys.Rev. C 100, 065803 (2019)

T.Szucs, P.Mohr, Gy.Gyurky, Z.Halasz, R.Huszank, G.G.Kiss, T.N.Szegedi, Zs.Torok, Zs.Fulop

Cross section of α-induced reactions on 197Au at sub-Coulomb energies

NUCLEAR REACTIONS 197Au(α, 2n)199Tl, E=17.48, 17.99, 18.49, 18.99, 19.46, 19.92 MeV; 197Au(α, n)200Tl, E=13.62, 13.91, 14.92, 15.91, 16.96, 17.48, 17.99, 18.49, 18.99, 19.46, 19.92 MeV; 197Au(α, γ)201Tl, E=13.91, 14.92, 15.91, 16.96, 17.48, 17.99, 18.99, 19.46, 19.92 MeV; measured Eγ, Iγ, E(x ray), I(x ray), σ(E) by activation method at the MTA Atomki cyclotron in Debrecen; deduced Absolute x-ray intensities from the decays of 199,200,201Tl. 197Au(α, α'), E=24.7 MeV; measured σ(θ) and total σ. Comparison to the best fit statistical model calculation using the AVR A-OMP, and with previous experimental results. Prediction of cross sections in the Gamow window with smaller uncertainties. Relevance to determination of reaction rates in large-scale reaction networks for heavy-element nucleosynthesis.

doi: 10.1103/PhysRevC.100.065803
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD4406.


2018KI04      Phys.Rev. C 97, 055803 (2018)

G.G.Kiss, T.Szucs, P.Mohr, Zs.Torok, R.Huszank, Gy.Gyurky, Zs.Fulop

α-induced reactions on 115In: Cross section measurements and statistical model analysis

NUCLEAR REACTIONS 115In(α, γ), (α, n)118mSb, E(cm)=8.83-15.58 MeV; 115In(α, n)118Sb, E(cm)=11.10-15.58 MeV; measured Eγ, Iγ, and corrected peak rates of α-irradiated targets, reaction σ(E) using a HPGe detector for γ detection and a low-energy photon spectrometer (LEPS) for x-ray detection at Atomki, Debrecen; deduced reaction σ best fit parameters, σ at energies corresponding to the Gamow window at 2 and 3 GK. Applied best fit parameters to α+113In reaction σ. Comparison with statistical model calculations using TALYS code, and with previous experimental values.

doi: 10.1103/PhysRevC.97.055803
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD4385.


2018MO15      Phys.Rev. C 97, 064613 (2018)

P.Mohr

Revised cross section of the 13C(α, n)16O reaction between 5 and 8 MeV

NUCLEAR REACTIONS 13C(α, n), E=0.8-8 MeV; analyzed previous experiments for σ(E) data and deduced corrected σ(E) based on improved determination of neutron detection efficiency; calculated branching ratios for the (α, n0), (α, n1), (α, n2), (α, n3) and (α, n4) channels using TALYS code, and compared with experimental values.

doi: 10.1103/PhysRevC.97.064613
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2018MO28      Phys.Rev. C 98, 045805 (2018)

P.Mohr, R.Talwar, M.L.Avila

Cross sections of α-induced reactions slightly below doubly magic 40Ca from the statistical model

NUCLEAR REACTIONS 38Ar(α, n), (α, p), (α, α)E=5-15 MeV; analyzed σ(E) experimental data with and without width fluctuation correction factor (WFCF), and with different α-nucleus optical model potentials (A-OMPs) within the statistical model using the TALYS code; deduced best fit parameters. 36,40Ar(α, p), (α, n), (α, α), 38Ca(α, p), (α, 2p), E=5-15 MeV; predicted total σ(E) and astrophysical reaction rate of 41Sc producing reaction using the best fit parameters.

doi: 10.1103/PhysRevC.98.045805
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2018TA12      Phys.Rev. C 97, 055801 (2018)

R.Talwar, M.J.Bojazi, P.Mohr, K.Auranen, M.L.Avila, A.D.Ayangeakaa, J.Harker, C.R.Hoffman, C.L.Jiang, S.A.Kuvin, B.S.Meyer, K.E.Rehm, D.Santiago-Gonzalez, J.Sethi, C.Ugalde, J.R.Winkelbauer

Experimental study of 38Ar + α reaction cross sections relevant to the 41Ca abundance in the solar system

NUCLEAR REACTIONS 4He(38Ar, p), (38Ar, n), (38Ar, α'), E=133 MeV; measured energies and yields of reaction products, energy- and angle integrated σ(E) using multisampling ionization chamber (MUSIC) detector at the ATLAS-ANL facility. Comparison with previous experimental values, and with statistical model calculations using TALYS code. 41K(p, α)38Ar, 41Ca(n, α)38Ar, T=0.1-10.0 GK; deduced astrophysical reaction rates, and compared with statistical model calculations, and with REACLIB fits. Discussed relevance to 41Ca abundance in the solar system.

doi: 10.1103/PhysRevC.97.055801
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2302.


2017MO03      Phys.Rev. C 95, 011302 (2017)

P.Mohr

α-decay properties of 296118 from double-folding potentials

RADIOACTIVITY 296Og(α); calculated Q(α) and α-decay half-life from barrier transmission and preformation probability using α-nucleus double-folding potentials.

doi: 10.1103/PhysRevC.95.011302
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2017MO05      Phys.Rev. C 95, 015807 (2017)

P.Mohr, Gy.Gyurky, Zs.Fulop

Statistical model analysis of α-induced reaction cross sections of 64Zn at low energies

NUCLEAR REACTIONS 64Zn(α, α), (α, γ), (α, n), (α, p), (α, X), E=4-50 MeV; analyzed experimental σ(E) measurements taken from the EXFOR database by statistical model using computer code TALYS, with about 7000 combinations of the α-nucleus, OMPs, nucleon-nucleus OMPs, γ-ray strength functions, and level densities; deduced χ2 fits to the data, total reaction cross sections. Relevance to astrophysical reaction rates.

doi: 10.1103/PhysRevC.95.015807
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2017MO37      Phys.Rev. C 96, 045808 (2017)

P.Mohr

Uncertainty of the astrophysical 17, 18O (α, n) 20, 21Ne reaction rates and the applicability of the statistical model for nuclei with A ≤ 20

NUCLEAR REACTIONS 17O(α, n)20Ne, 18O(α, n)21Ne, E(cm)<6 MeV; analyzed S(E) from neutron counting, and partial (α, n0) and (α, n1) cross section measurements, analyzed reaction rates from NACRE compilations. 20Ne(p, α)17F, E=5-11 MeV; analyzed experimental σ(E). Comparison with statistical model calculations using TALYS code.

doi: 10.1103/PhysRevC.96.045808
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2017MO41      Eur.Phys.J. A 53, 209 (2017)

P.Mohr

α-cluster states in 46, 54Cr from double-folding potentials

NUCLEAR STRUCTURE 46,54Cr; calculated α-cluster properties of low-lying (quasi-)bound positive parity states, radius, reduced α-decay widths, B(E2) using double-folding model. Charge density distribution compared with TALYS, B(E2) with ENSDF, other quantities with published Souza and Miyake results.

NUCLEAR REACTIONS 50Ti(α, α), E=25i, 104, 140 MeV; calculated σ(θ) using different folding potentials (different densities); deduced optical potential parameters using the data.

doi: 10.1140/epja/i2017-12410-7
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2017YA27      Astrophys.J. 848, 98 (2017)

S.Q.Yan, Z.H.Li, Y.B.Wang, K.Nishio, M.Lugaro, A.I.Karakas, H.Makii, P.Mohr, J.Su, Y.J.Li, I.Nishinaka, K.Hirose, Y.L.Han, R.Orlandi, Y.P.Shen, B.Guo, S.Zeng, G.Lian, Y.S.Chen, W.P.Liu

The 95Zr(n, γ)96Zr Cross Section from the Surrogate Ratio Method and Its Effect on s-process Nucleosynthesis

NUCLEAR REACTIONS 94,90Zr(18O, 16O), E=117 MeV; measured reaction products; deduced σ for surrogate reactions. Comparison with KADONIS and ENDF/B-VII.1 evaluated nuclear library and TALYS nuclear code calculations.

doi: 10.3847/1538-4357/aa8c74
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset32770.


2016MO16      Phys.Rev. C 93, 059801 (2016)

P.Mohr

Comment on "Structure effects in the 15N(n, γ)16N radiative capture reaction from the Coulomb dissociation of 16N"

NUCLEAR REACTIONS 15N(n, γ)16N, E(cm)<0.5 MeV; analyzed Coulomb dissociation scenario for cross section measurement as proposed in 2015Ne14 reference; deduced that such experiment is not possible as the dominating branchings of the capture reaction lead to excited states in 16N, which do not contribute in a Coulomb dissociation; also found a discrepancy between the energy dependence of the branching ratios in the Coulomb dissociation calculations by 2015Ne14 and in the direct capture (DC) calculations.

doi: 10.1103/PhysRevC.93.059801
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2016MO22      Phys.Rev. C 93, 065804 (2016)

P.Mohr

Nucleosynthesis of 92Nb and the relevance of the low-lying isomer at 135.5 keV

NUCLEAR STRUCTURE 92Nb; calculated stellar transition rate from the ground state to the 135-keV isomer, and the effective half-life of 92Nb ground state as function of the temperature; analyzed influence of 135-keV isomer on the nucleosynthesis of 92Nb; deduced no effect due to this isomer on the production of 92Nb in explosive scenarios of nucleosynthesis. Relevance to the use of 92Nb as a cosmic chronometer.

doi: 10.1103/PhysRevC.93.065804
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2016MO23      Astrophys.J. 827, 29 (2016)

P.Mohr, C.Heinz, M.Pignatari, I.Dillmann, A.Mengoni, F.Kappeler

Re-evaluation of the 16O(N, γ)17O Cross Section at Astrophysical Energies and Its Role as a Neutron Poison in the s-process

NUCLEAR REACTIONS 16O(n, γ), E<700 KeV; analyzed available experimental data from KADoNiS and REACLIB, ENDF/B-VII.1, JEFF-3.2, JENDL-4.0 evaluated libraries; deduced Maxwellian-averaged σ, reaction rates.

doi: 10.3847/0004-637X/827/1/29
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2016MO26      Phys.Rev. C 94, 035801 (2016)

P.Mohr

Role of (α, n)reactions under r-process conditions in neutrino-driven winds reexamined

NUCLEAR REACTIONS 86Se(α, n), (α, xn), E=1-15 MeV; calculated total reaction σ(E) using several different α-nucleus potentials, reflexion coefficients at energies above, around, and below the Coulomb barrier. Comparison with experimental data, and with σ(E) values for 34S, 44Ti, 50Cr and 64Zn targets. Relevance to astrophysical r-process in nucleosynthesis.

doi: 10.1103/PhysRevC.94.035801
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2016OR09      Phys.Rev. C 94, 055807 (2016)

A.Ornelas, P.Mohr, Gy.Gyurky, Z.Elekes, Zs.Fulop, Z.Halasz, G.G.Kiss, E.Somorjai, T.Szucs, M.P.Takacs, D.Galaviz, R.T.Guray, Z.Korkulu, N.Ozkan, C.Yalcin

alpha scattering and alpha-induced reaction cross sections of 64Zn at low energies

NUCLEAR REACTIONS 64Zn(α, α), (α, α'), E=12.05, 16.12 MeV; measured scattered particle spectra, Eα, Iα, elastic σ(θ), inelastic σ(E) at the Atomki cyclotron facility; deduced total σ, parameters of optical potential, phase shifts and reflection coefficients using σ(θ) elastic data at Eα=13.4-50.5 MeV from previous studies and the present work, rise of the elastic cross sections at very backward angles considered as so-called anomalous large-angle elastic scattering (ALAS). 64Zn(α, γ), (α, p), (α, n), E=16.12 MeV; measured Eγ, Iγ, σ using activation technique. Comparison with theoretical calculations based on different global α-nucleus optical potentials, and Hartree-Fock BCS γ-ray strength for (α, γ) channel.

doi: 10.1103/PhysRevC.94.055807
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD4366.


2015FA12      Phys.Rev. C 92, 052802 (2015)

T.Faestermann, P.Mohr, R.Hertenberger, H.-F.Wirth

Broad levels in 17O and their relevance for the astrophysical s process

NUCLEAR REACTIONS 19F(d, α)17O, E=22 MeV; measured Eα, Iα using Q3D spectrograph at TUM, Garching. 17O; deduced levels between 3.8 and 7.8 MeV, J, π, widths. Discussed consequences for resonances populated near 7 MeV in 13C(α, n)16O reaction, relevant in s-process nucleosynthesis.

doi: 10.1103/PhysRevC.92.052802
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2286. Data from this article have been entered in the XUNDL database. For more information, click here.


2015MO09      Eur.Phys.J. A 51, 56 (2015)

P.Mohr

Cross sections of α-induced reactions for targets with masses A ≈ 20-50 at low energies

doi: 10.1140/epja/i2015-15056-5
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2015OR03      Nucl.Phys. A940, 194 (2015)

A.Ornelas, G.G.Kiss, P.Mohr, D.Galaviz, Zs.Fulop, Gy.Gyurky, Z.Mate, T.Rauscher, E.Somorjai, K.Sonnabend, A.Zilges

The 106Cd(α, α)106Cd elastic scattering in a wide energy range for γ process studies

NUCLEAR REACTIONS 106Cd(α, α), E=16.1, 17.7, 19.6 MeV; measured Eα, Iα(θ). 106Cd(α, α), E(cm)=15.6-26.0 MeV; calculated σ(θ) using ATOMKI-V1 optical potential; deduced optical model parameters from fit to available data. Potentials compared with those obtained by others using different potentials. 106Cd(α, n), (α, p), (α, γ), E(cm)=7-13 MeV; calculated S-factor using different potentials. Compared with data.

doi: 10.1016/j.nuclphysa.2015.04.008
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD4340.


2015SZ03      Phys.Rev. C 92, 044328 (2015)

T.Szucs, P.Mohr

Addendum to "Determination of γ-ray widths in 15N using nuclear resonance fluorescence"

NUCLEAR REACTIONS 15N(γ, γ'), E<12.6 MeV; analyzed experimental data in authors' previous work 2015Sz02, resonance strengths from 14C(p, γ)15N, and γ-ray branching ratios; deduced levels, J, π, absolute widths Γp, Γγ, Γγ, 0, and Γ of 3/2 levels at 10702 and 10804 keV. Comparison with evaluated data in ENSDF.

doi: 10.1103/PhysRevC.92.044328
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2014MO11      Phys.Rev. C 89, 058801 (2014)

P.Mohr

Unexpected properties of the 33S(α, p)36Cl reaction cross section at low energies

NUCLEAR REACTIONS 33S(α, p)36Cl, E=2.5-9 MeV; calculated astrophysical S(E) factor. 33S(α, p), (α, n), E=2.5-9 MeV; calculated σ(α, n)/σ(α, p) as function of energy, single-particle strength per MeV, total reduced σ(E) versus reduced incident energy for α-induced reactions on 33S, 64Zn, 89Y, 106,110,116Cd, 112,120,124Sn, 140Ce, 141Pr, 144Sm targets. NON-SMOKER and TALYS statistical model calculations. Comparison with experimental data for 33S(α, p) reaction shows unexpected behavior.

doi: 10.1103/PhysRevC.89.058801
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2014MO39      Phys.Rev. C 90, 065806 (2014)

P.Mohr, R.Longland, C.Iliadis

Thermonuclear reaction rate of 18Ne(α, p)21Na from Monte Carlo calculations

NUCLEAR REACTIONS 18Ne(α, p), E=1-3 MeV; analyzed resonance strengths for α resonances in 22Mg from 40 keV to 5 MeV, astrophysical S(E) factor; deduced reaction rates for T9=0.1-3.0 using Monte Carlo method. Comparison with previous reaction rates.

doi: 10.1103/PhysRevC.90.065806
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2014ZH05      Phys.Rev. C 89, 015804 (2014)

L.Y.Zhang, J.J.He, A.Parikh, S.W.Xu, H.Yamaguchi, D.Kahl, S.Kubono, P.Mohr, J.Hu, P.Ma, S.Z.Chen, Y.Wakabayashi, H.W.Wang, W.D.Tian, R.F.Chen, B.Guo, T.Hashimoto, Y.Togano, S.Hayakawa, T.Teranishi, N.Iwasa, T.Yamada, T.Komatsubara, Y.H.Zhang, X.H.Zhou

Investigation of the thermonuclear 18Ne(α, p)21Na reaction rate via resonant elastic scattering of 21Na + p

NUCLEAR REACTIONS 1H(21Na, p), E=89 MeV, [21Na secondary beam from 2H(20Ne, X), E=8.2 MeV/nucleon primary reaction]; measured particle spectra, Ep, Ip, σ using CNS Radioactive Ion Beam Separator at RIKEN facility. 22Mg; deduced levels, resonances, J, π, proton widths, resonance parameters by R-matrix analysis. comparison with previous experimental results. 18Ne(α, p)21Na; deduced thermonuclear reaction rates. One-zone postprocessing x-ray burst calculations, and effect on peak nuclear energy generation rate, reaction fluxes, and onset temperature of breakout reaction from hot CNO cycles to rp process in type I x-ray bursts.

doi: 10.1103/PhysRevC.89.015804
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2013KI11      Phys.Rev. C 88, 045804 (2013)

G.G.Kiss, P.Mohr, Zs.Fulop, T.Rauscher, Gy.Gyurky, T.Szucs, Z.Halasz, E.Somorjai, A.Ornelas, C.Yalcin, R.T.Guray, N.Ozkan

High precision 113In(α, α)113In elastic scattering at energies near the Coulomb barrier for the astrophysical γ process

NUCLEAR REACTIONS 113In(α, α), E=16.15-19.15 MeV; measured E(α), I(α), σ(E, θ) at ATOMKI facility in Debrecen; deduced global α+nucleus optical model parameters. Comparison with reduced σ for 89Y+α, 92Mo+α, 106,110,116Cd+α, 112,124Sn+α and 144Sm+α reactions. 113In(α, γ)117Sb, 113In(α, n)116Sb, E=8-15 MeV; deduced astrophysical S(E) factor, σ ratio. Relevance to γ process for production of p nuclei in supernova explosions.

doi: 10.1103/PhysRevC.88.045804
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2013MO07      Phys.Rev. C 87, 035801 (2013)

P.Mohr, A.Matic

Examination and experimental constraints of the stellar reaction rate factor NA (σν) of the 18Ne(α, p)21Na reaction at temperatures of x-ray bursts

NUCLEAR REACTIONS 18Ne(α, p)21Na, E=0.9-3.2 MeV; analyzed and compiled σ(E) data, stellar reaction rate factors; recommended new reaction rate factors. comparison between direct and inverse reaction rates. Implications for the breakout from HCNO cycle.

doi: 10.1103/PhysRevC.87.035801
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2013MO08      Phys.Rev. C 87, 035802 (2013)

P.Mohr

Total reaction cross section σreac of α-induced reactions from elastic scattering: The example 140Ce(α, α)140Ce

NUCLEAR REACTIONS 140Ce(α, α), E<40 MeV; analyzed σ(θ, E) data; deduced reflection coefficients, optical potentials. 64Zn, 89Y, 106,110,116Cd, 112,120,124Sn, 140Ce, 141Pr, 144Sm(α, α), E=0.7-3.0 MeV; compared reduced σ(E) data with predictions from global a-nucleus potentials. Optical model. 143Nd(n, α)140Ce, E<10 MeV; calculated σ(E) using MCF potential in the statistical model code TALYS; comparison with experimental data.

doi: 10.1103/PhysRevC.87.035802
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2013MO28      At.Data Nucl.Data Tables 99, 651 (2013)

P.Mohr, G.G.Kiss, Zs.Fulop, D.Galaviz, Gy.Gyurky, E.Somorjai

Elastic alpha scattering experiments and the alpha-nucleus optical potential at low energies

NUCLEAR REACTIONS 89Y, 92Mo, 106,110,116Cd, 112,124Sn, 144Sm(α, α), E<20 MeV; analyzed available data; deduced σ, σ(θ), Woods-Saxon potential parameters.

doi: 10.1016/j.adt.2012.10.003
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2012GY02      J.Phys.:Conf.Ser. 337, 012009 (2012)

Gy.Gyurky, J.Farkas, Z.Halasz, Zs.Fulop, E.Somorjai, T.Szucs, P.Mohr, A.Wallner

Experimental study of α-induced reactions on 64Zn for the astrophysical γ-process

NUCLEAR REACTIONS 64Zn(α, n), (α, p), (α, γ), (α, α), E=4-8.8 MeV; measured Eγ, Iγ; deduced (α, p) σ using activation method; calculated (α, p) σ using NON-SMOKER and TALYS.

doi: 10.1088/1742-6596/337/1/012009
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2012GY03      Phys.Rev. C 86, 041601 (2012)

Gy.Gyurky, P.Mohr, Zs.Fulop, Z.Halasz, G.G.Kiss, T.Szucs, E.Somorjai

Relation between total cross sections from elastic scattering and α-induced reactions: The example of 64Zn

NUCLEAR REACTIONS 64Zn(α, γ), (α, p), (α, n), E(cm)=5.8-12.4 MeV; measured Eγ, Iγ, σ(E); deduced total reaction σ by comparison with σ for 64Zn(α, α) reaction, astrophysical S factor. Comparison with statistical model predictions.

doi: 10.1103/PhysRevC.86.041601
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2012KI15      J.Phys.:Conf.Ser. 337, 012029 (2012)

G.G.Kiss, P.Mohr, Zs.Fulop, Gy.Gyurky, Z.Elekes, J.Farkas, E.Somorjai, D.Galaviz, R.T.Guray, N.Ozkan, C.Yalcin, J.Gorres

Investigating the variation of elastic alpha scattering cross sections in the A ∼ 100 region

NUCLEAR REACTIONS 110,116Cd(α, α), E=16.14, 19.46 MeV; measured Eα, Iα(θ); deduced σ(θ); calculated σ(θ) using optical model with various parameters sets.

doi: 10.1088/1742-6596/337/1/012029
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2012MO17      Nucl.Instrum.Methods Phys.Res. A688, 62 (2012)

P.Mohr, C.Iliadis

Recommended cross-section of the 16O(p, γ)17F reaction below 2.5 MeV: A potential tool for quantitative analysis and depth profiling of oxygen

NUCLEAR REACTIONS 16O(p, γ), E=0.5-2.5 MeV; analyzed available data; deduced recommended σ and uncertainties. Comparison with available data.

doi: 10.1016/j.nima.2012.05.084
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2012MO33      Phys.Rev. C 86, 068803 (2012)

P.Mohr

Direct capture in the 130Sn(n, γ)131Sn and 132Sn(n, γ)133 Sn reactions under r-process conditions

NUCLEAR REACTIONS 130,132Sn(n, γ), E<1.5 MeV; calculated direct capture σ(E), stellar reaction rates as function of temperature T9. Influence of low-lying resonances on stellar reaction rates.

doi: 10.1103/PhysRevC.86.068803
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2012MO42      Rev.Mod.Phys. 84, 1527 (2012)

P.J.Mohr, B.N.Taylor, D.B.Newell

CODATA recommended values of the fundamental physical constants: 2010

doi: 10.1103/RevModPhys.84.1527
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2012OR03      J.Phys.:Conf.Ser. 337, 012030 (2012)

A.Ornelas, D.Galaviz, Zs.Fulop, Gy.Gyurky, G.Kiss, Z.Mate, P.Mohr, T.Rauscher, E.Somorjai, K.Sonnabend, A.Zilges

Investigation of α-nuclear potential families from elastic scattering experiments

NUCLEAR REACTIONS 106Cd(α, γ), E(cm)=7-12 MeV;106Cd(α, n), E(cm)=10-12 MeV; calculated S-factor using various sets of optical model parameters. 106Cd(α, α), E=16.1-18.8 MeV; calculated σ(θ) using various sets of optical model parameters. Compared with published data of the same group.

doi: 10.1088/1742-6596/337/1/012030
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2011KI15      Phys.Rev. C 83, 065807 (2011)

G.G.Kiss, P.Mohr, Zs.Fulop, Gy.Gyurky, Z.Elekes, J.Farkas, E.Somorjai, C.Yalcin, D.Galaviz, R.T.Guray, N.Ozkan, J.Gorres

110, 116Cd(α, α)110, 116Cd elastic scattering and systematic investigation of elastic α scattering cross sections along the Z=48 isotopic and N=62 isotonic chains

NUCLEAR REACTIONS 110,116Cd(α, α'), E=16.4, 19.46 MeV; measured Eα, yields and σ(θ). 106Cd, 112Sn(α, α'), E(cm)=15.6, 18.9 MeV; analyzed σ(θ) data. 110,116Cd(α, α), E=8-20 MeV; analyzed σ(E) data. Optical model analysis and predictions. Global parameterization of the α-nucleus potential used in astrophysical p-process calculations.

doi: 10.1103/PhysRevC.83.065807
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2011MO26      Phys.Rev. C 84, 055803 (2011)

P.Mohr

Total reaction cross sections from 141Pr(α, α)141Pr elastic scattering and α-induced reaction cross sections at low energies

NUCLEAR REACTIONS 141Pr(α, α), E=19.0, 23.97, 32.0, 37.7, 45.0; analyzed σ(θ) data; deduced energy-dependent local optical potential parameters. 141Pr(α, n), (α, 2n), E(cm)=10-50 MeV; analyzed total reaction cross sections, and astrophysical S factors using parameters from elastic scattering analysis.

doi: 10.1103/PhysRevC.84.055803
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2010CR05      J.Phys.:Conf.Ser. 202, 012033 (2010)

S.Cristallo, L.Piersanti, R.Gallino, O.Straniero, F.Kappeler, I.Dominguez, P.Mohr

The long-standing problem of 176Lu/176Hf branching: A new approach with full stellar evolutionary models

NUCLEAR REACTIONS 175Lu(n, γ), E above 15 keV; calculated long-term time behaviour of 176Lu and 176Hf [product of β-decay of excited 176Lu].

doi: 10.1088/1742-6596/202/1/012033
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2010GO10      Phys.Rev. C 81, 055808 (2010)

G.Gosselin, P.Morel, P.Mohr

Modification of nuclear transitions in stellar plasma by electronic processes: K isomers in 176Lu and 180Ta under s-process conditions

NUCLEAR STRUCTURE 176Lu, 180Ta; calculated transition rates enhancements for nuclear excitation by electron capture (NEEC) process for transitions between high-K, low-K and intermediate states, and partial half-lives as function of temperature in stellar plasma environment.

doi: 10.1103/PhysRevC.81.055808
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2010HA27      Phys.Rev. C 82, 058801 (2010)

T.Hayakawa, P.Mohr, T.Kajino, S.Chiba, G.J.Mathews

Reanalysis of the (J=5) state at 592 keV in 180Ta and its role in the υ-process nucleosynthesis of 180Ta in supernovae

NUCLEAR STRUCTURE 180mTa; analyzed production and freeze out of 180mTa through the influence of a spin 5 state at 592 keV. Implication for coproduction by neutrino nucleosynthesis with an electron neutrino temperature of kT AP 4 MeV. 180Ta; discussed low-K and high-K rotational band structures; deduced astrophysical reaction rates.

doi: 10.1103/PhysRevC.82.058801
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2010HA28      Phys.Rev. C 82, 065803 (2010)

F.Hammache, M.Heil, S.Typel, D.Galaviz, K.Summerer, A.Coc, F.Uhlig, F.Attallah, M.Caamano, D.Cortina, H.Geissel, M.Hellstrom, N.Iwasa, J.Kiener, P.Koczon, B.Kohlmeyer, P.Mohr, E.Schwab, K.Schwarz, F.Schumann, P.Senger, O.Sorlin, V.Tatischeff, J.P.Thibaud, E.Vangioni, A.Wagner, W.Walus

High-energy breakup of 6Li as a tool to study the Big Bang nucleosynthesis reaction 2H(α, γ)6Li

NUCLEAR REACTIONS 208Pb(6Li, dα), E=150 MeV/nucleon; measured 2H and α particle spectra, angles, positions and energy loss of 2H and α particles, cross section, σ(θ) of excited 6Li; deduced E1, E2, and total S24 factors. Comparison with previous experimental data and GEANT simulations. 2H(α, γ); deduced astrophysical nuclear reaction rates from breakup of 6Li. Predictions for the 6Li/1H production ratio in Big Bang nucleosynthesis.

NUCLEAR REACTIONS 208Pb(d, d), E=110, 140 MeV; 208Pb(α, α), E=480, 699 MeV; 208Pb(6Li, 6Li), E=600 MeV; analyzed σ(θ) data; deduced Woods-Saxon potential parameters.

doi: 10.1103/PhysRevC.82.065803
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2010MO26      Phys.Rev. C 82, 044606 (2010)

P.Mohr, P.N.de Faria, R.Lichtenthaler, K.C.C.Pires, V.Guimaraes, A.Lepine-Szily, D.R.Mendes, Jr., A.Arazi, A.Barioni, V.Morcelle, M.C.Morais

Comparison of 120Sn(6He, 6He)120Sn and 120Sn(α, α)120Sn elastic scattering and signatures of the 6He neutron halo in the optical potential

NUCLEAR REACTIONS 120Sn(α, α), E=20.0, 26.1, 27.1, 29.7, 30.8, 34.4, 40.0, 50.5 MeV; 120Sn(6He, 6He), E=17.4, 18.05, 19.8, 20.50 MeV; analyzed σ, excitation functions, reflection coefficients using systematic double-folding Woods-Saxon potentials.

doi: 10.1103/PhysRevC.82.044606
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2010MO27      Phys.Rev. C 82, 047601 (2010)

P.Mohr, D.Galaviz, Zs.Fulop, Gy.Gyurky, G.G.Kiss, E.Somorjai

Total reaction cross sections from elastic α-nucleus scattering angular distributions around the Coulomb barrier

NUCLEAR REACTIONS 89Y(α, α), E(cm)=15.51, 18.63 MeV; 92Mo(α, α), E(cm)=13.20, 15.69, 18.62 MeV; 112Sn(α, α), E(cm)=13.90, 18.84 MeV; 124Sn(α, α), E(cm)=18.90 MeV; 144Sm(α, α), E(cm)=19.45 MeV; analyzed total reaction σ, σ(θ) using optical model calculations.

doi: 10.1103/PhysRevC.82.047601
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2009KI16      Phys.Rev. C 80, 045807 (2009)

G.G.Kiss, P.Mohr, Zs.Fulop, D.Galaviz, Gy.Gyurky, Z.Elekes, E.Somorjai, A.Kretschmer, K.Sonnabend, A.Zilges, M.Avrigeanu

High precision 89Y(α, α)89Y scattering at low energies

NUCLEAR REACTIONS 89Y(α, α), E(cm)=15.51, 18.63 MeV; measured Eα, Iα, σ; deduced parameters for local scattering potentials. 89Y(α, α), E(cm)=20.1, 22.0, 23.9, 40.2, 62.2, 158.9 MeV; 92Mo(α, α), E(cm)=15.69, 18.62 MeV; analyzed σ and σ(θ) measurements with different potential parameters. 93Nb; analyzed α-cluster states in 89Y+α system, bands, and B(E2) using potential parameters close to those for the scattering potential.

doi: 10.1103/PhysRevC.80.045807
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2009MO10      Phys.Rev. C 79, 045804 (2009)

P.Mohr, S.Bisterzo, R.Gallino, F.Kappeler, U.Kneissl, N.Winckler

Properties of the 5- state at 839 keV in 176Lu and the s-process branching at A=176

NUCLEAR STRUCTURE 176Lu; analyzed partial level scheme, coupling between low- and high-K states; calculated reaction rates for photoactivation process and for transitions from high K ground state to low K isomers in 176Lu. Implications for 176Lu/176Hf as thermometer for astrophysical s-process.

doi: 10.1103/PhysRevC.79.045804
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2009MO19      Phys.Rev. C 79, 065804 (2009)

P.Mohr

Low-energy 3He(α, α)3He elastic scattering and the 3He(α, γ)7Be reaction

NUCLEAR REACTIONS 3He(α, α), E(cm)=1407, 1597, 1711, 2053, 2715, 3252 keV; 3He(α, γ)7Be, E(cm)=0.1, 3.0 MeV; calculated σ, σ(θ), wavefunctions, phase shifts, astrophysical S factors, and branching ratios using direct capture two-body model with a double-folding potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.79.065804
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2008IL02      Phys.Rev. C 77, 045802 (2008)

C.Iliadis, C.Angulo, P.Descouvemont, M.Lugaro, P.Mohr

New reaction rate for 16O(p, γ)17F and its influence on the oxygen isotopic ratios in massive AGB stars

NUCLEAR REACTIONS 16O(p, γ), E<3.5 MeV; evaluated σ, deduced astrophysical S-factor, reaction rate. Compared with rate of 17O(p, α) reaction.

doi: 10.1103/PhysRevC.77.045802
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2008KI06      J.Phys.(London) G35, 014037 (2008)

G.G.Kiss, G.Gyurky, Z.Fulop, E.Somorjai, D.Galaviz, A.Kretschmer, K.Sonnabend, A.Zilges, P.Mohr, M.Avrigeanu

Study of the 89Y(α, α)89Y reaction close to the Coulomb barrier

NUCLEAR REACTIONS 89Y(α, α), E(cm)=15.5, 18.6 MeV; measured Eα, Iα, σ(θ).

doi: 10.1088/0954-3899/35/1/014037
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2008MO18      Rev.Mod.Phys. 80, 633 (2008)

P.J.Mohr, B.N.Taylor, D.B.Newell

CODATA recommended values of the fundamental physical constants: 2006

doi: 10.1103/RevModPhys.80.633
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2008MU12      Phys.Rev. C 77, 051601 (2008)

A.M.Mukhamedzhanov, F.M.Nunes, P.Mohr

Benchmark on neutron capture extracted from (d, p) reactions

NUCLEAR REACTIONS 48Ca(d, p), E=2, 13, 19, 56 MeV; 48Ca(n, γ), E=25 MeV; analyzed angular distributions; deduced asymptotic normalization coefficients, spectroscopic factors.

doi: 10.1103/PhysRevC.77.051601
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2007MO01      Phys.Rev. C 75, 012802 (2007)

P.Mohr, F.Kappeler, R.Gallino

Survival of nature's rarest isotope 180Ta under stellar conditions

NUCLEAR REACTIONS 180mTa(γ, γ'), E=low; analyzed σ, T1/2 in stellar environment.

doi: 10.1103/PhysRevC.75.012802
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2007MO03      Eur.Phys.J. A 31, 23 (2007)

P.Mohr

Super-allowed α decay above doubly-magic 100Sn and properties of 104Te = 100Sn (X) α

RADIOACTIVITY 104,105,106Te, 108,109,110Xe, 212,213,214Po, 216,217,218Rn(α); calculated α-decay T1/2, Qα, preformation factors. Double-folding potentials.

doi: 10.1140/epja/i2006-10168-7
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2007MO33      Eur.Phys.J. A 32, 357 (2007)

P.Mohr, Zs.Fulop, H.Utsunomiya

Photo-induced nucleosynthesis: Current problems and experimental approaches

NUCLEAR REACTIONS 92Mo, 144Sm, 186Os(α, γ), E=5-15 MeV; calculated astrophysical S-factor and suggested an improved S-factor.

doi: 10.1140/epja/i2006-10378-y
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2006MO06      Phys.Rev. C 73, 031301 (2006); Erratum Phys.Rev. C 74, 069902 (2006)

P.Mohr

α-nucleus potentials, α-decay half-lives, and shell closures for superheavy nuclei

NUCLEAR STRUCTURE A=130-146; A=208-290; analyzed α-decay preformation factors, volume integrals, shell closure features, α-nucleus potential strength parameters. Folding potential.

RADIOACTIVITY 326132, 310126(α); calculated Eα, T1/2. Folding potential.

doi: 10.1103/PhysRevC.73.031301
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2006MO29      Eur.Phys.J. A 27, Supplement 1, 75 (2006)

P.Mohr, C.Angulo, P.Descouvemont, H.Utsunomiya

Relation between the 16O(α, γ)20Ne reaction and its reverse 20Ne(γ, α)16O reaction in stars and in the laboratory

NUCLEAR REACTIONS 16O(α, γ), 20Ne(γ, α), E=low; analyzed astrophysical reaction rates.

doi: 10.1140/epja/i2006-08-010-1
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2006UT02      Eur.Phys.J. A 27, Supplement 1, 153 (2006)

H.Utsunomiya, S.Goko, H.Toyokawa, H.Ohgaki, K.Soutome, H.Yonehara, S.Goriely, P.Mohr, Zs.Fulop

Photonuclear reaction data and γ-ray sources for astrophysics

NUCLEAR REACTIONS 139La, 141Pr, 186W, 187Re, 188Os(γ, n), E ≈ 8-16 MeV; measured photodisintegration σ.

doi: 10.1140/epja/i2006-08-023-8
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2006UT04      Nucl.Phys. A777, 459 (2006)

H.Utsunomiya, P.Mohr, A.Zilges, M.Rayet

Direct determination of photodisintegration cross sections and the p-process

NUCLEAR REACTIONS 186W, 185,187Re, 190,192,198Pt, 197Au, 196,198,204Hg, 204Pb(γ, n), E=spectrum; analyzed reaction rate. 148Gd(γ, n), (γ, α), E=0-12 MeV; calculated reaction rate integral. Hauser-Feshbach model. 181Ta(γ, n), E=7.5-13.5 MeV; analyzed σ. Hauser-Feshbach with quasi-particle RPA. Comparison with data.

NUCLEAR STRUCTURE 138Ba, 140Ce, 142Nd, 144Sm; analyzed B(E1).

doi: 10.1016/j.nuclphysa.2004.06.025
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2005GA21      Phys.Rev. C 71, 065802 (2005)

D.Galaviz, Zs.Fulop, Gy.Gyurky, Z.Mate, P.Mohr, T.Rauscher, E.Somorjai, A.Zilges

Elastic α scattering on 112Sn and 124Sn at astrophysically relevant energies

NUCLEAR REACTIONS 112Sn(α, α), E=14.4, 19.5 MeV; 124Sn(α, α), E=19.5 MeV; measured elastic σ(θ); deduced optical potential parameters. 112Sn(α, γ), E(cm)=7-11 MeV; calculated astrophysical S-factors, reaction rates.

doi: 10.1103/PhysRevC.71.065802
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2005MO16      Rev.Mod.Phys. 77, 1 (2005)

P.J.Mohr, B.N.Taylor

CODATA recommended values of the fundamental physical constants: 2002

doi: 10.1103/RevModPhys.77.1
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2005MO34      Phys.Rev. C 72, 035803 (2005)

P.Mohr

Low-energy direct capture in the 16O(α, γ)20Ne reaction

NUCLEAR REACTIONS 16O(α, γ), E=0-1 MeV; calculated astrophysical S-factor, reaction rate, branching ratios. Comparison with previous results.

doi: 10.1103/PhysRevC.72.035803
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2005SH37      Phys.Rev. C 72, 025808 (2005)

T.Shizuma, H.Utsunomiya, P.Mohr, T.Hayakawa, S.Goko, A.Makinaga, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, Y.-W.Lui, H.Toyokawa, A.Uritani, S.Goriely

Photodisintegration cross section measurements on 186W, 187Re, and 188Os: Implications for the Re-Os cosmochronology

NUCLEAR REACTIONS 186W, 187Re, 188Os(γ, n), E=7.3-10.9 MeV; measured σ. 185W, 186Re, 187Os(n, γ), E < 100 keV; calculated capture σ. Astrophysical implications discussed.

doi: 10.1103/PhysRevC.72.025808
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2005SH41      Nucl.Phys. A758, 561c (2005)

T.Shizuma, H.Utsunomiya, S.Goko, P.Mohr, T.Hayakawa, A.Makinaga, K.Y.Hara, H.Ohgaki, Y.-W.Lui, S.Goriely

Photoneutron cross section measurements on 186W, 187Re and 188Os for cosmochronology

NUCLEAR REACTIONS 188Os(γ, n), E=8-11 MeV; measured σ; deduced parameters. 187Os(n, γ), E=5-50 keV; calculated capture σ. Astrophysical implications discussed.

doi: 10.1016/j.nuclphysa.2005.05.103
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2004MO11      Phys.Rev. C 69, 032801 (2004)

P.Mohr, T.Shizuma, H.Ueda, S.Goko, A.Makinaga, K.Y.Hara, T.Hayakawa, Y.-W.Lui, H.Ohgaki, H.Utsunomiya

s-process branching at 185W revised

NUCLEAR REACTIONS 186W(γ, n), E ≈ 4-11 MeV; measured neutron spectra, photodisintegration σ. 185W(n, γ), E=low; deduced capture σ. Astrophysical implications discussed.

doi: 10.1103/PhysRevC.69.032801
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2004UT01      Nucl.Phys. A738, 136 (2004)

H.Utsunomiya, K.Y.Hara, S.Goko, H.Akimune, T.Yamagata, M.Ohta, H.Ohgaki, H.Toyokawa, T.Hayakawa, T.Shizuma, P.Mohr, Y.-W.Lui, H.Ohkuma, H.Yonehara, K.Soutome, M.Arnould

Photonuclear reaction studies at synchrotron radiation facilities in Japan

doi: 10.1016/j.nuclphysa.2004.04.022
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2003GA30      Nucl.Phys. A718, 578c (2003)

D.Galaviz, M.Babilon, Zs.Fulop, Gy.Gyurky, R.Hillier, Z.Mate, P.Mohr, T.Rauscher, E.Somorjai, A.Zilges, L.Zolnai

α-nucleus Potentials and Photon-induced Nucleosynthesis

NUCLEAR REACTIONS 112Sn(α, α), E(cm) ≈ 14 MeV; measured σ(θ); deduced optical potential parameters.

doi: 10.1016/S0375-9474(03)00858-3
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2003GA33      Nucl.Phys. A719, 111c (2003)

D.Galaviz, M.Babilon, Zs.Fulop, Gy.Gyurky, Z.Mate, R.Hillier, P.Mohr, T.Rauscher, E.Somorjai, A.Zilges, L.Zolnai

Determination of α-nucleus potentials by α-elastic scattering and its implications for the γ-process

NUCLEAR REACTIONS 112,124Sn(α, α), E(cm) ≈ 19 MeV; measured σ(θ); deduced potential parameters. Astrophysical implications discussed.

doi: 10.1016/S0375-9474(03)00977-1
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2003HA33      Nucl.Phys. A719, 308c (2003)

T.Hartmann, S.Volz, M.Babilon, P.Mohr, K.Vogt, A.Zilges

E1 strength in N = 82 nuclei

NUCLEAR REACTIONS 138Ba, 140Ce, 144Sm(γ, γ'), E ≈ 9-10 MeV bremsstrahlung; measured Eγ, Iγ. 138Ba, 140Ce, 144Sm deduced E1 strength distributions, related features.

doi: 10.1016/S0375-9474(03)00938-2
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2003MO12      Phys.Rev. C 67, 065802 (2003)

P.Mohr

Low-energy direct capture in the 8Li(n, γ)9Li and 8B(p, γ)9C reactions

NUCLEAR REACTIONS 8Li(n, γ), E<1 MeV; calculated direct capture σ. 8B(p, γ), E=low; calculated astrophysical S-factor. Direct capture model.

doi: 10.1103/PhysRevC.67.065802
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2003MO24      Nucl.Phys. A718, 243c (2003)

P.Mohr, T.Rauscher, K.Sonnabend, K.Vogt, A.Zilges

Photoreactions in Nuclear Astrophysics

NUCLEAR REACTIONS 186W, 190,192,198Pt, 196,198,204Hg, 197Au, 204Pb(γ, n), E ≈ threshold; measured σ. Photoactivation technique, comparison with model predictions.

doi: 10.1016/S0375-9474(03)00721-8
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2003MO29      Nucl.Phys. A719, 90c (2003)

P.Mohr, M.Babilon, D.Galaviz, K.Sonnabend, K.Vogt, A.Zilges

Nucleosynthesis by photon-induced reactions

NUCLEAR REACTIONS 148Gd(γ, n), (γ, α), E=0-20 MeV; calculated σ, astrophysical reaction rates.

doi: 10.1016/S0375-9474(03)00973-4
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2003SO05      Astrophys.J. 583, 506 (2003)

K.Sonnabend, P.Mohr, K.Vogt, A.Zilges, A.Mengoni, T.Rauscher, H.Beer, F.Kappeler, R.Gallino

The s-Process Branching at 185W

NUCLEAR REACTIONS 186W(γ, n), E=8775 keV bremsstrahlung; measured σ. 186W(γ, n), E=7-10 MeV; calculated σ. 185W(n, γ), E=stellar; calculated Maxwellian averaged σ, astrophysical s-process branching. Activation technique.

doi: 10.1086/345086
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2003SO18      Nucl.Phys. A718, 533c (2003)

K.Sonnabend, A.Mengoni, P.Mohr, T.Rauscher, K.Vogt, A.Zilges

Determination of the (n, γ) reaction rate of unstable 185W in the astrophysical s-process via its inverse reaction

NUCLEAR REACTIONS 186W(γ, n), E=8775 keV bremsstrahlung; measured reaction rate. 185W(n, γ), E=low; deduced Maxwellian averaged capture σ. Activation technique.

RADIOACTIVITY 185W(β-) [from 186W(γ, n)]; measured Eγ, Iγ, T1/2.

doi: 10.1016/S0375-9474(03)00835-2
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2003SO20      Nucl.Phys. A719, 123c (2003)

K.Sonnabend, A.Mengoni, P.Mohr, T.Rauscher, K.Vogt, A.Zilges

Determination of (n, γ) reaction rates at s-process branching points via their inverse reactions

NUCLEAR REACTIONS 96Zr, 197Au(γ, n), E ≈ 8000-10000 keV bremsstrahlung; measured energy-integrated σ. Astrophysical implications discussed.

doi: 10.1016/S0375-9474(03)00980-1
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2003SO23      Phys.Rev. C 68, 048802 (2003)

K.Sonnabend, P.Mohr, A.Zilges, R.Hertenberger, H.-F.Wirth, G.Graw, T.Faestermann

First excited state of the s-process branching nucleus 95Zr

NUCLEAR REACTIONS 94Zr(d, p), E=22 MeV; measured Ep, σ(θ). 95Zr deduced levels. Comparison with previous results.

doi: 10.1103/PhysRevC.68.048802
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2003VO16      Nucl.Phys. A718, 575c (2003)

K.Vogt, P.Mohr, T.Rauscher, K.Sonnabend, A.Zilges

Determination of (γ, n) reaction rates for the astrophysical γ process

NUCLEAR REACTIONS 204Pb(γ, n), E ≈ 8700-9700 keV bremsstrahlung; measured photoactivation σ.

doi: 10.1016/S0375-9474(03)00857-1
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2002BA28      Phys.Rev. C65, 037303 (2002)

M.Babilon, T.Hartmann, P.Mohr, K.Vogt, S.Volz, A.Zilges

Dipole and Electric Quadrupole Excitations in 32S up to 9.9 MeV

NUCLEAR REACTIONS 32S(γ, γ'), E=9.9 MeV bremsstrahlung; measured Eγ, Iγ. 32S deduced levels, J, π, excitation B(E1), B(M1), B(E2), possible two-phonon state.

doi: 10.1103/PhysRevC.65.037303
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2002BA81      Phys.Rev. C66, 028801 (2002)

M.Babilon, W.Bayer, D.Galaviz, T.Hartmann, C.Hutter, P.Mohr, W.Rochow, K.Sonnabend, K.Vogt, S.Volz, A.Zilges

Resonance strengths for the reaction 28Si(α, γ)32S at low energies

NUCLEAR REACTIONS 28Si(α, γ), E=2.91 MeV; measured Eγ, Iγ; deduced resonance features, astrophysical reaction rate. 32S deduced resonances J, π, strength.

doi: 10.1103/PhysRevC.66.028801
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2002BE18      Phys.Rev. C65, 035801 (2002)

D.Belic, C.Arlandini, J.Besserer, J.de Boer, J.J.Carroll, J.Enders, T.Hartmann, F.Kappeler, H.Kaiser, U.Kneissl, E.Kolbe, K.Langanke, M.Loewe, H.J.Maier, H.Maser, P.Mohr, P.von Neumann-Cosel, A.Nord, H.H.Pitz, A.Richter, M.Schumann, F.-K.Thielemann, S.Volz, A.Zilges

Photo-Induced Depopulation of the 180Tam Isomer via Low-Lying Intermediate States: Structure and astrophysical implications

NUCLEAR REACTIONS 180mTa(γ, γ'), E=0.8-3.1 MeV bremsstrahlung; measured delayed Eγ, Iγ, X-ray spectra; deduced activation yields. 180Ta deduced intermediate states energies, transition strengths. Astrophysical implications discussed. Comparisons with previous results, model predictions.

RADIOACTIVITY 180Ta(EC), (β-); measured T1/2.

doi: 10.1103/PhysRevC.65.035801
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2002BE37      Nucl.Phys. A705, 239 (2002)

H.Beer, P.V.Sedyshev, W.Rochow, P.Mohr, H.Oberhummer

Neutron Capture Measurements of the Noble Gas Isotopes 22Ne, 40Ar and 78, 80, 84, 86Kr in the keV Energy Region

NUCLEAR REACTIONS 22Ne, 40Ar, 78,80,84,86Kr(n, γ), E=25-215 keV; measured capture σ; deduced astrophysical reaction rates. 85Kr deduced probability of isomeric state population. Activation technique, high-pressure gas targets.

doi: 10.1016/S0375-9474(02)00645-0
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2002BE70      Nucl.Phys. A709, 453 (2002)

H.Beer, P.V.Sedyshev, W.Rochow, T.Rauscher, P.Mohr

Neutron Capture of 30Si

NUCLEAR REACTIONS 30Si(n, γ), E=25-215 keV; measured capture σ; deduced Maxwellian averaged σ, resonance parameters. Activation technique.

doi: 10.1016/S0375-9474(02)01030-8
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2002FU04      J.Phys.(London) G28, 643 (2002)

M.Fujiwara, T.Kawabata, P.Mohr

Alpha-Decay Rates of Yb and Gd in Solar-Neutrino Detectors

RADIOACTIVITY 168,170,171,172,173,174,176Yb, 148,150,152,154Gd(α); calculated T1/2. Implications for background counts in solar neutrino detectors discussed.

doi: 10.1088/0954-3899/28/4/305
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2002HA13      Phys.Rev. C65, 034301 (2002)

T.Hartmann, J.Enders, P.Mohr, K.Vogt, S.Volz, A.Zilges

Dipole and Electric Quadrupole Excitations in 40, 48Ca

NUCLEAR REACTIONS 40,48Ca(γ, γ'), E=9.9 MeV bremsstrahlung; measured Eγ, Iγ. 40,48Ca deduced levels, J, π, widths, B(E1) and B(E2) distributions. Comparison with model predictions.

doi: 10.1103/PhysRevC.65.034301
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2002RE29      Phys.Rev.Lett. 89, 132501 (2002)

K.E.Rehm, C.L.Jiang, I.Ahmad, J.Caggiano, P.Collon, J.P.Greene, D.Henderson, A.Heinz, R.V.F.Janssens, R.C.Pardo, T.Pennington, J.P.Schiffer, R.H.Siemssen, A.H.Wuosmaa, M.Paul, P.Mohr

Large Angle Elastic Alpha Scattering on a N = Z Nucleus above A = 40

NUCLEAR REACTIONS 4He(44Ti, 44Ti), (44Ti, 44Ti'), (40Ca, 40Ca), E(cm)=21.8 MeV; measured σ(θ); deduced angle-integrated σ, optical model parameters.

doi: 10.1103/PhysRevLett.89.132501
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2002VO13      Nucl.Phys. A707, 241 (2002)

K.Vogt, P.Mohr, M.Babilon, W.Bayer, D.Galaviz, T.Hartmann, C.Hutter, T.Rauscher, K.Sonnabend, S.Volz, A.Zilges

Measurement of the (γ, n) Cross Section of the Nucleus 197Au Close Above the Reaction Threshold

NUCLEAR REACTIONS 197Au(γ, n), E=8325-9900 keV bremsstrahlung; measured σ; deduced astrophysical reaction rates. Photoactivation technique. Comparison with previous results and model predictions.

doi: 10.1016/S0375-9474(02)00922-3
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2002WI18      Phys.Rev. C 66, 065802 (2002)

S.Wilmes, V.Wilmes, G.Staudt, P.Mohr, J.W.Hammer

The 15N(α, γ)19F reaction and nucleosynthesis of 19F

NUCLEAR REACTIONS 15N(α, γ), E=461-2642 keV; measured Eγ, Iγ; deduced resonance energies, strengths, widths, and branching ratios, astrophysical reaction rates. 19F deduced levels.

doi: 10.1103/PhysRevC.66.065802
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