NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 26, 2024.

Search: Author = A.P.Ramirez

Found 16 matches.

Back to query form

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
Citations: PlumX Metrics
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
Citations: PlumX Metrics

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 E_n = 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
Citations: PlumX Metrics

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
Citations: PlumX Metrics

2022LE11      Phys.Rev. C 106, 044302 (2022)

S.R.Lesher, A.Aprahamian, K.Lee, B.Alemayehu, L.M.Clark, X.James, J.C.T.Lowrie, M.Meier, L.McEwan, S.Mukhopadhyay, E.E.Peters, A.P.D.Ramirez, M.Ryan, B.G.Rice, A.Stratman, E.Temanson, J.R.Vanhoy, S.W.Yates

Lifetime measurements of 0⁺ states in ¹⁶⁸Er with the Doppler-shift attenuation method

NUCLEAR REACTIONS ¹⁶⁸Er(n, n'γ), E=1.2-3.0 MeV in 0.1 MeV steps; measured Eγ, Iγ, excitation functions, γ(θ), level T_1/2 by Doppler-shift attenuation method (DSAM) at the University of Kentucky Accelerator Laboratory. ¹⁶⁸Er; deduced levels, J, π, excited 0+ states, bands, multipole mixing ratios, B(E2), B(E1). Comparison with previous experimental results, and with evaluated data in the ENSDF database. Systematics of low-lying levels and B(E2) values in ^{162,164,166,168,170}Er.

doi: 10.1103/PhysRevC.106.044302
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2022RA12      Nucl.Phys. A1023, 122446 (2022)

A.P.D.Ramirez, E.E.Peters, J.R.Vanhoy, S.F.Hicks, L.A.Alasagas, D.K.Alcorn-Dominguez, S.T.Block, S.T.Byrd, E.A.Chouinard, B.M.Combs, B.P.Crider, E.C.Derdyn, L.Downes, J.A.Erlanson, S.E.Evans, A.J.French, E.A.Garza, J.Girgis, T.D.Harrison, S.L.Henderson, T.J.Howard, D.T.Jackson, L.J.Kersting, A.Kumar, S.H.Liu, C.J.Lueck, E.M.Lyons, P.J.McDonough, M.T.McEllistrem, T.J.Morin, S.Mukhopadhyay, T.A.Nguyen, M.Nickel, S.Nigam, R.L.Pecha, J.Potter, F.M.Prados-Estevez, B.G.Rice, T.J.Ross, Z.C.Santonil, J.Schneiderjan, L.C.Sidwell, A.J.Sigillito, J.L.Steves, B.K.Thompson, D.W.Watts, Y.Xiao, S.W.Yates

Neutron elastic and inelastic scattering differential cross sections on carbon

NUCLEAR REACTIONS C(n, n), (n, n'), E=0.5-8 MeV; measured reaction products, En, In, TOF; deduced σ(θ). Comparison with ENDF/B-VIII.0 library. The Univ ersity of Kentucky Accelerator Laboratory (UKAL).

doi: 10.1016/j.nuclphysa.2022.122446
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14784.

2022RA13      Nucl.Phys. A1024, 122474 (2022)

A.P.D.Ramirez, E.E.Peters, S.Mukhopadhyay, M.T.McEllistrem, S.W.Yates, E.C.Derdeyn, S.F.Hicks, E.M.Lyons, T.J.Morin, J.R.Vanhoy

Neutron elastic and inelastic cross section measurements on silicon from 0.8-8 MeV

NUCLEAR REACTIONS Si(n, n), (n, n'), E=0.8-8 MeV; measured reaction products, En, In; deduced σ(θ), σ. Comparison with ENDF/B-VIII.0, JEFF-3.3, JENDL-4.0 data evaluations, TALYS-1.95 nuclear reaction code calculations. The University of Kentucky Accelerator Laboratory (UKAL).

doi: 10.1016/j.nuclphysa.2022.122474
Citations: PlumX Metrics

2019DH01      Nucl.Sci.Eng. 193, 1033 (2019)

S.Dhakal, C.R.Brune, T.N.Massey, S.M.Grimes, A.V.Voinov, S.Akhtar, An.P.D.Ramirez, A.L.Richard

Investigation of Neutron Cross Section for Iron in the ENDF Library wiTh. Pulsed Sphere Measurements

NUCLEAR REACTIONS ⁵⁶Fe(n, n), (n, n'), E=7.2-10 MeV; measured reaction products, En, In; deduced σ. Comparison with MCNP simulations, ENDF/B libraries.

doi: 10.1080/00295639.2019.1591095
Citations: PlumX Metrics

2019EV01      Phys.Rev. C 99, 024306 (2019)

L.J.Evitts, A.B.Garnsworthy, T.Kibedi, J.Smallcombe, M.W.Reed, A.E.Stuchbery, G.J.Lane, T.K.Eriksen, A.Akber, B.Alshahrani, M.de Vries, M.S.M.Gerathy, J.D.Holt, B.Q.Lee, B.P.McCormick, A.J.Mitchell, M.Moukaddam, S.Mukhopadhyay, N.Palalani, T.Palazzo, E.E.Peters, A.P.D.Ramirez, T.Tornyi, S.W.Yates

E0 transition strength in stable Ni isotopes

NUCLEAR REACTIONS ^58,60,62Ni(p, p'), E=4.7-9.2 MeV; measured Eγ, Iγ, γ(θ), conversion electrons using the CAESAR array for γ detection and Super-e spectrometer for electron detection at ANU-Canberra. ^58,60,62Ni(n, n'), E=2.42, 2.90 MeV; measured Eγ, Iγ, level half-lives by DSAM at the University of Kentucky Accelerator Laboratory. ^58,60,62Ni; deduced levels, J, π, K-conversion coefficients, E2/M1 multipole mixing ratios and E0 admixtures in 2+ to 2+ transitions, 0+ to 0+ E0 transitions, electric monopole (E0) transition strengths, B(M1), B(E2). Comparison with evaluated data in Nuclear Data Sheets. Systematics of 2+ to 2+ and 0+ to 0+ monopole transition strengths ρ²(E0) in even-even nuclei with A<250.

doi: 10.1103/PhysRevC.99.024306
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2018EV01      Phys.Lett. B 779, 396 (2018)

L.J.Evitts, A.B.Garnsworthy, T.Kibedi, J.Smallcombe, M.W.Reed, B.A.Brown, A.E.Stuchbery, G.J.Lane, T.K.Eriksen, A.Akber, B.Alshahrani, M.de Vries, M.S.M.Gerathy, J.D.Holt, B.Q.Lee, B.P.McCormick, A.J.Mitchell, M.Moukaddam, S.Mukhopadhyay, N.Palalani, T.Palazzo, E.E.Peters, A.P.D.Ramirez, S.R.Stroberg, T.Tornyi, S.W.Yates

Identification of significant E0 strength in the 2⁺₂ → 2⁺₁ transitions of ^{58, 60, 62}Ni

NUCLEAR REACTIONS ^58,60,62Ni(p, p'), E<9.2 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, nuclear and quadrupole moments, B(E2), B(M1). Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2018.01.076
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2018VA02      Nucl.Phys. A972, 107 (2018)

J.R.Vanhoy, S.H.Liu, S.F.Hicks, B.M.Combs, B.P.Crider, A.J.French, E.A.Garza, T.Harrison, S.L.Henderson, T.J.Howard, M.T.McEllistrem, S.Nigam, R.L.Pecha, E.E.Peters, F.M.Prados-Estevez, A.P.D.Ramirez, B.G.Rice, T.J.Ross, Z.C.Santonil, L.C.Sidwell, J.L.Steves, B.K.Thompson, S.W.Yates

⁵⁴Fe neutron elastic and inelastic scattering differential cross sections from 2-6 MeV

NUCLEAR REACTIONS ⁵⁴Fe(n, n), (n, n'), E=2-6 MeV; measured En, In(θ); deduced σ(θ); calculated σ(θ) using coupled channels, TALYS, DWBA code ECIS06; deduced increase of DWBA deformation parameter above 4 MeV by about 1/4 using fit to the data.

doi: 10.1016/j.nuclphysa.2018.02.004
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14451.

2017RA12      Phys.Rev. C 95, 064605 (2017)

A.P.D.Ramirez, J.R.Vanhoy, S.F.Hicks, M.T.McEllistrem, E.E.Peters, S.Mukhopadhyay, T.D.Harrison, T.J.Howard, D.T.Jackson, P.D.Lenzen, T.D.Nguyen, R.L.Pecha, B.G.Rice, B.K.Thompson, S.W.Yates

Neutron scattering cross section measurements for ⁵⁶Fe

NUCLEAR REACTIONS ⁵⁶Fe(n, n), (n, n'), E=1.30-7.96 MeV; measured E(n), I(n), σ(E, θ) using a C₆D₆ liquid scintillation detector and time-of-flight techniques at the University of Kentucky Accelerator Laboratory. Comparison with previous experimental data, evaluations in ENDF, JENDL, and JEFF databases, and with theoretical calculations using different optical model potentials in TALYS and EMPIRE codes.

doi: 10.1103/PhysRevC.95.064605
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14462.

2016PE13      Phys.Rev. C 94, 024313 (2016)

E.E.Peters, T.J.Ross, S.F.Ashley, A.Chakraborty, B.P.Crider, M.D.Hennek, S.H.Liu, M.T.McEllistrem, S.Mukhopadhyay, F.M.Prados-Estevez, A.P.D.Ramirez, J.S.Thrasher, S.W.Yates

0⁺states in ^{130, 132}Xe: A search for E(5) behavior

NUCLEAR REACTIONS ¹³⁰Xe(n, n'), E=2.0, 2.5 MeV; ¹³²Xe(n, n'), E=2.2, 2.7 MeV; measured Eγ, Iγ, γ(θ), cross sections for level population, level half-lives by DSAM at the University of Kentucky Van de Graaff accelerator facility. ^130,132Xe; deduced levels, J, π, γ-branching ratios, multipolarity, mixing ratio, B(E2). Discussed E(5) critical-point symmetry. Comparison of experimental cross sections with statistical model calculations. Systematics of energies and B(E2) of first 2+ states and E(first 4+)/E(first 2+) ratios in N=56-90 even-A Xe isotopes taken from the ENSDF database.

doi: 10.1103/PhysRevC.94.024313
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2015RA11      Phys.Rev. C 92, 014303 (2015)

A.P.D.Ramirez, A.V.Voinov, S.M.Grimes, Y.Byun, C.R.Brune, T.N.Massey, S.Akhtar, S.Dhakal, C.E.Parker

Level density and mechanism of deuteron-induced reactions on ^{54, 56, 58}Fe

NUCLEAR REACTIONS ^54,56,58Fe(d, d), (d, n), (d, p), (d, α), E=5, 7, 9 MeV; measured neutron, protons, deuterons, and α particle spectra, σ(θ, E) at Ohio University tandem accelerator facility. ^55,57,59Co, ^55,57Fe, ^52,54,56Mn; deduced nuclear level densities of the residual nuclei from best fit to compound double differential cross sections, and compared with Gilbert-Cameron model using Iljinov parameter systematics. Comparison with theoretical cross sections using Hartree-Fock-Bogoliubov method (HFBM) and Gilbert-Cameron model (GCM).

doi: 10.1103/PhysRevC.92.014303
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2164.

2014BY06      Phys.Rev. C 90, 044303 (2014)

Y.Byun, A.P.D.Ramirez, S.M.Grimes, A.V.Voinov, C.R.Brune, T.N.Massey

Deuteron-induced reactions on ⁸⁹Y and nuclear level density of ⁹⁰Zr

NUCLEAR REACTIONS ⁸⁹Y(d, d), (d, n), (d, p), E=5, 6, 7.44 MeV; measured deuteron spectra, E(n), I(n), E(p), I(p), σ(E, θ), angle-integrated σ(E) at Ohio University tandem accelerator facility. ⁹⁰Zr; deduced levels, J, π, configuration, level densities. Comparison with microscopic HFB model calculations using EMPIRE code.

doi: 10.1103/PhysRevC.90.044303
Citations: PlumX Metrics

2013RA32      Phys.Rev. C 88, 064324 (2013)

A.P.D.Ramirez, A.V.Voinov, S.M.Grimes, A.Schiller, C.R.Brune, T.N.Massey, A.Salas-Bacci

Nuclear level densities of ^{64, 66}Zn from neutron evaporation

NUCLEAR REACTIONS ⁶³Cu(d, n)⁶⁴Zn, ⁶⁵Cu(d, n)⁶⁶Zn, E=6, 7.5 MeV; measured E(n), I(n), n(θ), σ(E, θ) using TOF technique at Edwards accelerator facility, Ohio University. Analysis by exciton model of nuclear reactions. Comparison with Hauser-Feshbach model calculations using EMPIRE and TALYS computer codes. Tested Fermi gas model, Gilber-Cameron model, and microscopic combinatorial approach with Hartree-Fock-Bogoliubov method (HFBM). ^64,66Zn; deduced level densities versus the excitation energy.

doi: 10.1103/PhysRevC.88.064324
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2087.