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NSR database version of April 11, 2024.

Search: Author = M.Ahmed

Found 80 matches.

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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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2022LI18      Phys.Rev.Lett. 128, 132502 (2022)

X.Li, M.W.Ahmed, A.Banu, C.Bartram, B.Crowe, E.J.Downie, M.Emamian, G.Feldman, H.Gao, D.Godagama, H.W.Griesshammer, C.R.Howell, H.J.Karwowski, D.P.Kendellen, M.A.Kovash, K.K.H.Leung, D.M.Markoff, J.A.McGovern, S.Mikhailov, R.E.Pywell, M.H.Sikora, J.A.Silano, R.S.Sosa, M.C.Spraker, G.Swift, P.Wallace, H.R.Weller, C.S.Whisnant, Y.K.Wu, Z.W.Zhao

Proton Compton Scattering from Linearly Polarized Gamma Rays

NUCLEAR REACTIONS 1H(polarized γ, γ'), E=83.4 MeV; measured reaction products, Eγ, Iγ; deduced σ(θ), electromagnetic dipole polarizabilities of the proton. The High Intensity Gamma-Ray Source facility at the Triangle Universities Nuclear Laboratory.

doi: 10.1103/PhysRevLett.128.132502
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2021AH02      Phys.Rev. C 103, 054312 (2021)

M.Ahmed, Y.X.Watanabe, Y.Hirayama, M.Mukai, J.H.Park, P.Schury, Y.Kakiguchi, A.Ozawa, M.Oyaizu, M.Wada, H.Miyatake

β-γ spectroscopy of the 195Os nucleus

RADIOACTIVITY 195Os(β-)[ionized 195Os using laser system from 198Pt(136Xe, X), E=9.4 MeV/nucleon at the KEK isotope separation system (KISS) at RIKEN RIBF facility]; measured Eβ, Iβ, Eγ, Iγ, x rays, βγ- and γγ-coin, half-life of 195Os decay using a multisegmented proportional gas counter (MSPGC) for β radiation, and four clover HPGe detectors for γ rays. 195Ir; deduced levels, J, π, Iβ feedings, logft. 195Os; deduced spin and parity of the ground state. Systematics of half-lives of 195,196,197,198,199,200,201,202,203,204,205,206Os, and comparison with theoretical predictions.

doi: 10.1103/PhysRevC.103.054312
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Data from this article have been entered in the XUNDL database. For more information, click here.


2021KR03      Nature(London) 589, 527 (2021)

J.J.Krauth, K.Schuhmann, M.A.Ahmed, F.D.Amaro, P.Amaro, F.Biraben, T.-L.Chen, D.S.Covita, A.J.Dax, M.Diepold, L.M.P.Fernandes, B.Franke, S.Galtier, A.L.Gouvea, J.Gotzfried, T.Graf, T.W.Hansch, J.Hartmann, M.Hildebrandt, P.Indelicato, L.Julien, K.Kirch, A.Knecht, Y.-W.Liu, J.Machado, C.M.B.Monteiro, F.Mulhauser, B.Naar, T.Nebel, F.Nez, J.M.F.dos Santos, J.P.Santos, C.I.Szabo, D.Taqqu, J.F.C.A.Veloso, J.Vogelsang, A.Voss, B.Weichelt, R.Pohl, A.Antognini, F.Kottmann

Measuring the α-particle charge radius with muonic helium-4 ions

ATOMIC PHYSICS 4He; measured frequencies; deduced resonances, isotope shifts, 2S-2P transitions in the muonic helium-4 ion that yields a precise determination of the root-mean-square charge radius of the α particle. Comparison with available data.

doi: 10.1038/s41586-021-03183-1
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2021LA03      Phys.Rev. C 103, 034311 (2021)

G.Laskaris, W.Ji, X.Yan, J.Zhou, W.R.Zimmerman, M.W.Ahmed, T.Averett, A.Deltuva, A.C.Fonseca, H.Gao, J.Golak, A.Kafkarkou, H.J.Karwowski, B.Lalremruata, J.Manfredi, J.M.Mueller, P.U.Sauer, R.Skibinski, A.P.Smith, M.B.Tsang, H.R.Weller, H.Witala, Y.K.Wu, Z.W.Zhao

First measurement of the asymmetry and the Gerasimov-Drell-Hearn integrand from the 3He((pol)(γ(pol), p)2H reaction at an incident photon energy of 29 MeV

NUCLEAR REACTIONS 3He(polarized γ, p)2H, E=29 MeV; measured Ep, Ip, p(θ), time-of-flight, spin-dependent asymmetry and total σ using a circularly polarized, monoenergetic γ-ray beam and a longitudinally polarized 3He target, and an array of depleted silicon surface barrier detectors at the High Intensity γ-ray Source (HIγS) facility at TUNL; deduced contribution from the two-body photo-disintegration to the 3He Gerasimov-Drell-Hearn (GDH) integrands, and compared with the state-of-the art three-nucleon system calculations.

doi: 10.1103/PhysRevC.103.034311
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0271.


2021WA39      Phys.Rev. C 104, 024330 (2021)

Y.X.Watanabe, P.M.Walker, Y.Hirayama, M.Mukai, H.Watanabe, G.J.Lane, M.Ahmed, M.Brunet, T.Hashimoto, S.Ishizawa, S.Kimura, F.G.Kondev, Yu.A.Litvinov, H.Miyatake, J.Y.Moon, T.Niwase, M.Oyaizu, J.H.Park, Zs.Podolyak, M.Rosenbusch, P.Schury, M.Wada

First direct observation of isomeric decay in neutron-rich odd-odd 186Ta

RADIOACTIVITY 186Ta(β-), 186mTa(IT)[from W(136Xe, X), E=7.2 MeV/nucleon, followed by laser ionization and mass separation at the KEK Isotope Separation System (KISS) of RIBF-RIKEN facility]; measured Eγ, Iγ, (particle)γ-coin, half-lives of decays of 186Ta and neutral 186mTa from γ-decay curves. 186Ta; deduced levels, J, π, E3 multipolarity of the 161-keV isomeric transition from a comparison of measured half-life of the neutral isomer with previous measurements of the ionized isomeric state of 186Ta using the Experimental Storage Ring at GSI Darmstadt, no evidence found for the β decay mode of the 186Ta isomer.

doi: 10.1103/PhysRevC.104.024330
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020HI01      Nucl.Instrum.Methods Phys.Res. B463, 425 (2020)

Y.Hirayama, Y.X.Watanabe, M.Mukai, P.Schury, M.Ahmed, H.Ishiyama, S.C.Jeong, Y.Kakiguchi, S.Kimura, J.Y.Moon, M.Oyaizu, J.H.Park, M.Wada, H.Miyatake

Nuclear spectroscopy of r-process nuclei using KEK Isotope Separation System

NUCLEAR REACTIONS 198Pt(136Xe, X)196Os/197Os/198Os/198Pt/199Pt, E=10.75 MeV/nucleon; measured reaction products, Eβ, Iβ, Eγ, Iγ; deduced T1/2 for osmium, HFS spectra for platinum.

doi: 10.1016/j.nimb.2019.04.035
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020LI10      Phys.Rev. C 101, 034618 (2020)

X.Li, M.W.Ahmed, A.Banu, C.Bartram, B.Crowe, E.J.Downie, M.Emamian, G.Feldman, H.Gao, D.Godagama, H.W.Griesshammer, C.R.Howell, H.J.Karwowski, D.P.Kendellen, M.A.Kovash, K.K.H.Leung, D.Markoff, S.Mikhailov, R.E.Pywell, M.H.Sikora, J.A.Silano, R.S.Sosa, M.C.Spraker, G.Swift, P.Wallace, H.R.Weller, C.S.Whisnant, Y.K.Wu, Z.W.Zhao

Compton scattering from 4He at the TUNL HIγS facility

NUCLEAR REACTIONS 4He(polarized γ, γ), E=81.3 MeV, 100% circularly and linearly polarized γ-ray beam via Compton backscattering from HiγS at TUNL; measured Compton scattered photons at different angles, time-of-flight spectra using an array of large NaI(Tl) detectors; deduced differential σ(θ). Comparison with previous experimental data from Lund at Eγ=87 MeV.

doi: 10.1103/PhysRevC.101.034618
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0259.


2020MU16      Phys.Rev. C 102, 054307 (2020)

M.Mukai, Y.Hirayama, Y.X.Watanabe, S.Schiffmann, J.Ekman, M.Godefroid, P.Schury, Y.Kakiguchi, M.Oyaizu, M.Wada, S.C.Jeong, J.Y.Moon, J.H.Park, H.Ishiyama, S.Kimura, H.Ueno, M.Ahmed, A.Ozawa, H.Watanabe, S.Kanaya, H.Miyatake

In-gas-cell laser resonance ionization spectroscopy of 196, 197, 198Ir

NUCLEAR MOMENTS 196,197,198Ir; measured hyperfine structure (HFS) spectra using in-gas-cell laser resonance ionization spectroscopy at the KEK Isotope Separation System at RIBF-RIKEN facility; deduced spins for the ground states, magnetic dipole moments, mean-square charge radii, isotope shifts, β2 deformation parameters. Comparison with theoretical calculations based on the strong coupling model. Comparison with previous experimental results. Systematics of quadrupole moments, magnetic dipole moments, mean-square charge radii and β2 deformation parameters for 189,191,193,196,197,198Ir.

NUCLEAR REACTIONS 198Pt(136Xe, X)196Ir/197Ir/198Ir, E=10.75 MeV/nucleon; measured extraction yields, Eβ, half-lives of the decays of 196Ir, 197Ir and 198Ir. The Ir isotopes produced in multi-nucleon transfer reaction. Comparison with previous experimental half-lives.

doi: 10.1103/PhysRevC.102.054307
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020SM01      Phys.Rev. C 101, 021302 (2020)

R.Smith, M.Gai, M.W.Ahmed, M.Freer, H.O.U.Fynbo, D.Schweitzer, S.R.Stern

Stringent upper limit on the direct 3α decay of the Hoyle state in 12C

NUCLEAR REACTIONS 12C(γ, α)8Be, E=9.6 MeV; analyzed experimental data in 2013Zi03 and other studies for the energy, width and decay of the second 2+ Hoyle state; deduced upper limit of direct 3α decay mode of the Hoyle state from the experimental value for the upper limit Γ for the second 2+ Hoyle state at ≈10 MeV, R-matrix analysis, and semiclassical Wenzel-Kramers-Brillouin approach. Comparison with measured experimental upper limit.

doi: 10.1103/PhysRevC.101.021302
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0258. Data from this article have been entered in the XUNDL database. For more information, click here.


2020WA12      Phys.Rev. C 101, 041305 (2020), Erratum Phys.Rev. C 103, 019902 (2021)

Y.X.Watanabe, M.Ahmed, Y.Hirayama, M.Mukai, J.H.Park, P.Schury, Y.Kakiguchi, S.Kimura, A.Ozawa, M.Oyaizu, M.Wada, H.Miyatake

Deexcitation γ-ray transitions from the long-lived Iπ = 13/2+ metastable state in 195Os

RADIOACTIVITY 195mOs(IT)[from 198Pt(136Xe, X), E=9.4 MeV/nucleon, followed by separation of fragments using KEK Isotope Separation System (KISS) at RIBF-RIKEN facility, and laser excitation of 195Os isomer]; measured Eγ, Iγ, ce, γγ- and (ce)γ-coin, neutral atom T1/2 of the 47-s, (13/2+) isomer from x-ray and γ-ray decay curves using multi-segmented proportional gas counter (MSPGC) for β, x-rays and conversion electrons, and four HPGe clover detectors for γ radiation. 195Os; deduced levels, J, π; discussed multipolarity of the low-energy γ transition from the isomer. Comparison with previous measurement of the 195mOs isomer and half-life of the fully-stripped isomer using the ESR at GSI. Comparison with experimental results for level schemes from the decays of the 13/2+ isomers in 197Pt and 199Hg.

doi: 10.1103/PhysRevC.101.041305
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020WA29      Phys.Rev.Lett. 125, 192505 (2020)

P.M.Walker, Y.Hirayama, G.J.Lane, H.Watanabe, G.D.Dracoulis, M.Ahmed, M.Brunet, T.Hashimoto, S.Ishizawa, F.G.Kondev, Y.A.Litvinov, H.Miyatake, J.Y.Moon, M.Mukai, T.Niwase, J.H.Park, Z.Podolyak, M.Rosenbusch, P.Schury, M.Wada, X.Y.Watanabe, W.Y.Liang, F.R.Xu

Properties of 187Ta Revealed through Isomeric Decay

RADIOACTIVITY 187Ta(IT) [from W(136Xe, X), E=7.2 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, γ-γ-, β-γ-coin.; deduced level energies, J, π, T1/2. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.125.192505
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Data from this article have been entered in the XUNDL database. For more information, click here.


2018HI07      Phys.Rev. C 98, 014321 (2018), Erratum Phys.Rev. C 106, 069902 (2022)

Y.Hirayama, Y.X.Watanabe, M.Mukai, M.Ahmed, S.C.Jeong, Y.Kakiguchi, S.Kimura, M.Oyaizu, J.H.Park, P.Schury, M.Wada, H.Watanabe, H.Miyatake

β- and γ-decay spectroscopy of 197, 198Os

RADIOACTIVITY 196,197,198Os, 198Ir(β-)[from 198Pt(136Xe, X), E=10.75 MeV/nucleon using KEK Isotope Separation System (KISS) at RIKEN, an argon-gas-cell-based laser ion source combined with an on-line isotope separator]; measured β- radiation using multisegmented proportional gas counter (MSPGC), Eγ, Iγ, γγ- and βγ-coin with particle selection condition of Os and Ir, half-lives of decays of 196,197,198Os and 198Ir. 197,198Ir, 198Pt; deduced levels, Iβ feedings, logft, configurations of parent and daughter states. 197mTl(IT); measured Eγ, Iγ, T1/2; deduced conversion coefficients and compared with previous results. Comparison with previous experimental data. A=195-206, Z=76; comparison of measured β-decay half-lives with theoretical results from DF3, FRDM, and KUTY models.

doi: 10.1103/PhysRevC.98.014321
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Data from this article have been entered in the XUNDL database. For more information, click here.


2018MU19      Nucl.Instrum.Methods Phys.Res. A884, 1 (2018)

M.Mukai, Y.Hirayama, Y.X.Watanabe, P.Schury, H.S.Jung, M.Ahmed, H.Haba, H.Ishiyama, S.C.Jeong, Y.Kakiguchi, S.Kimura, J.Y.Moon, M.Oyaizu, A.Ozawa, J.H.Park, H.Ueno, M.Wada, H.Miyatake

High-efficiency and low-background multi-segmented proportional gas counter for β-decay spectroscopy

RADIOACTIVITY 198Ir(β-), 199Pt(IT), (β-) [from 198Pt(136Xe, X), E=9.6 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced T1/2 and uncertainties. Comparison with available data.

doi: 10.1016/j.nima.2017.12.013
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017HI05      Phys.Rev. C 96, 014307 (2017)

Y.Hirayama, M.Mukai, Y.X.Watanabe, M.Ahmed, S.C.Jeong, H.S.Jung, Y.Kakiguchi, S.Kanaya, S.Kimura, J.Y.Moon, T.Nakatsukasa, M.Oyaizu, J.H.Park, P.Schury, A.Taniguchi, M.Wada, K.Washiyama, H.Watanabe, H.Miyatake

In-gas-cell laser spectroscopy of the magnetic dipole moment of the N ≈ 126 isotope 199Pt

NUCLEAR MOMENTS 199Pt, 199mPt; measured magnetic dipole and electric quadrupole moments, isotope shifts, mean-square charge radii by hyperfine splitting of the 48.792-nm transition using the in-gas-cell laser ionization spectroscopy (IGLIS), and the half-lives of the ground state and the isomer; discussed configurations. 192,196,198Pt; measured mean-square charge radii relative to that of 194Pt by hyperfine structure. Pt isotopes produced in 198Pt(136Xe, X), E=10.75 MeV/nucleon reaction using the on-line KEK Isotope Separation System (KISS) at RIKEN. Comparison with previous experimental results, and with self-consistent Bogoliubov (HFB) model calculations. Systematics of magnetic dipole moments of 5/2- and 13/2+ states in 193,195,197,199Pt and 197,199Hg. Systematics of mean square charge radius and quadrupole deformation in A=178-199 Pt isotopes.

doi: 10.1103/PhysRevC.96.014307
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Data from this article have been entered in the XUNDL database. For more information, click here.


2017SI26      Phys.Rev. C 96, 055209 (2017)

M.H.Sikora, M.W.Ahmed, A.Banu, C.Bartram, B.Crowe, E.J.Downie, G.Feldman, H.Gao, H.W.Griesshammer, H.Hao, C.R.Howell, H.J.Karwowski, D.P.Kendellen, M.A.Kovash, X.Li, D.M.Markoff, S.Mikhailov, V.Popov, R.E.Pywell, J.A.Silano, M.C.Spraker, P.Wallace, H.R.Weller, C.S.Whisnant, Y.K.Wu, W.Xiong, X.Yan, Z.W.Zhao

Compton scattering from 4He at 61 MeV

NUCLEAR REACTIONS 4He(γ, γ'), E=61 MeV; measured Eγ, Iγ, Compton scattering differential σ(θ) using NaI(Tl) detectors and liquid 4He target at HIγS facility at TUNL. Data interpreted using phenomenological model sensitive to the dipole isoscalar electromagnetic polarizabilities of the nucleon. Comparison with previous experimental data. Benchmarks for future calculations from effective field theories and lattice quantum chromodynamics.

doi: 10.1103/PhysRevC.96.055209
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0232.


2016HI09      Nuovo Cim. C 39, 359 (2016)

Y.Hirayama, Y.X.Watanabe, H.Miyatake, P.Schury, M.Wada, M.Oyaizu, Y.Kakiguchi, M.Mukai, S.Kimura, M.Ahmed, S.C.Jeong, J.Y.Moon, J.H.Park

Nuclear spectroscopy of r-process nuclei around N=126 using KISS

RADIOACTIVITY 199Pt, 196Ir(β-); measured decay products; deduced T1/2 and their uncertainties. Laser resonance ionization technique in the gas cell.

doi: 10.1393/ncc/i2016-16359-9
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2015LA22      Phys.Lett. B 750, 547 (2015)

G.Laskaris, X.Yan, J.M.Mueller, W.R.Zimmerman, W.Xiong, M.W.Ahmed, T.Averett, P.-H.Chu, A.Deltuva, C.Flower, A.C.Fonseca, H.Gao, J.Golak, J.N.Heideman, H.J.Karwowski, M.Meziane, P.U.Sauer, R.Skibinski, I.I.Strakovsky, H.R.Weller, H.Witala, Y.K.Wu

Measurement of the doubly-polarized 3He(pol)(γ(pol), n)pp reaction at 16.5 MeV and its implications for the GDH sum rule

NUCLEAR REACTIONS 3He(polarized γ, n), E=12.8, 14.7 MeV; measured reaction products, Eγ, Iγ, En, In; deduced σ(θ, E), σ, contribution from the three-body channel to the Gerasimov-Drell-Hearn (GDH) integrand. Comparison with available data, Monte Carlo simulations using GEANT4.

doi: 10.1016/j.physletb.2015.09.065
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0212.


2015MU09      Phys.Rev. C 92, 034604 (2015)

J.M.Mueller, M.W.Ahmed, B.J.Davis, H.J.Karwowski, D.M.Markoff, L.S.Myers, M.C.Spraker, S.Stave, J.R.Tompkins, H.R.Weller, W.R.Zimmerman

Polarization asymmetries in the 9Be (γ, n0)reaction

NUCLEAR REACTIONS 9Be(polarized γ, n), E=5.5-15.5 MeV from High Intensity γ-ray Source (HIγS) at Duke University and TUNL; measure neutron spectra, time-of-flight spectrum, neutron yields parallel and perpendicular to the plane of beam polarization, polarization asymmetries using nearly 100% linearly polarized and monoenergetic γ-ray beam. Comparison with direct capture calculations using only E1 contributions. Relevance to new method of assaying special nuclear materials (SNM).

doi: 10.1103/PhysRevC.92.034604
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2015WU05      Phys.Rev. C 92, 044603 (2015)

W.A.Wurtz, R.E.Pywell, B.E.Norum, S.Kucuker, B.D.Sawatzky, H.R.Weller, S.Stave, M.W.Ahmed

Photodisintegration of 7Li with progeny nuclei in excited states

NUCLEAR REACTIONS 7Li(polarized γ, n)6Li, Eγ=13, 15 MeV, E(6Li) at 2.19, 3.56 MeV; 7Li(polarized γ, d)5He, Eγ=12, 13, 15 MeV, E(5He) at 1.27 MeV decays to n+α; measured neutron kinetic energy spectra, absolute cross sections and angular dependences using the Blowfish Neutron Detector Array. Photon beams from High Intensity Gamma-Ray Source (HIGS) at Duke University.

doi: 10.1103/PhysRevC.92.044603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0209.


2014KA04      Phys.Rev. C 89, 014601 (2014); Pub.Note Phys.Rev. C 89, 019902 (2014)

A.Kafkarkou, M.W.Ahmed, D.P.Kendellen, I.Mazumdar, J.M.Mueller, L.S.Myers, M.H.Sikora, H.R.Weller, W.R.Zimmerman

Cross section measurements of the 10B(p, γ)11C reaction between 2.0 and 6.0 MeV

NUCLEAR REACTIONS 10B(p, γ)11C, E=2.0-6.0 MeV; measured Eγ, Iγ, 511-keV annihilation radiation from 11C decay, 11C decay curve, total production σ(E) for 11C by activation method at TUNL tandem accelerator facility; deduced astrophysical S factors. Comparison with previous measurements. Relevance to boron-fueled colliding beam nuclear reactors.

doi: 10.1103/PhysRevC.89.014601
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2209.


2014LA04      Phys.Rev. C 89, 024002 (2014)

G.Laskaris, Q.Ye, B.Lalremruata, Q.J.Ye, M.W.Ahmed, T.Averett, A.Deltuva, D.Dutta, A.C.Fonseca, H.Gao, J.Golak, M.Huang, H.J.Karwowski, J.M.Mueller, L.S.Myers, C.Peng, B.A.Perdue, X.Qian, P.U.Sauer, R.Skibinski, S.Stave, J.R.Tompkins, H.R.Weller, H.Witala, Y.K.Wu, Y.Zhang, W.Zheng

Spin-dependent cross sections from the three-body photodisintegration of 3He at incident energies of 12.8 and 14.7 MeV

NUCLEAR REACTIONS 3He(polarized γ, n), E=12.8, 14.7 MeV; measured time-of-flight spectra, γ spectra, and neutron spectra from three-body breakup of 3He using 16 liquid scintillator detectors, spin-dependent double-differential σ(E, θ) at HiγS-TUNL facility. Monoenergetic circularly polarized γ beam, and longitudinally polarized 3He target. Comparison with previous experimental results, and with theoretical calculations.

doi: 10.1103/PhysRevC.89.024002
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0181.


2014MU01      Phys.Rev. C 89, 034615 (2014)

J.M.Mueller, M.W.Ahmed, R.H.France, M.S.Johnson, H.J.Karwowski, L.S.Myers, J.Randrup, M.H.Sikora, M.C.Spraker, S.Stave, J.R.Tompkins, R.Vogt, H.R.Weller, C.S.Whisnant, W.R.Zimmerman

Prompt neutron polarization asymmetries in photofission of 232Th, 233, 235, 238U, 237Np, and 239, 240Pu

NUCLEAR REACTIONS 232Th, 233,235,238U, 237Np, 239,240Pu(polarized γ, F), E=5.3-7.6 MeV; measured E(n), I(n), time-of flight spectrum, angular distribution, and polarization asymmetry of prompt neutrons generated by fission, θ(fragment) at HIγS-TUNL facility; deduced angular distribution coefficients b and c, and compared with predicted values from FREYA computer code of event-by-event Monte Carlo prompt neutron+γ-ray emission calculation. Discussed differences in polarization asymmetries between the even-even actinides and odd-A actinides.

doi: 10.1103/PhysRevC.89.034615
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2014MU14      Nucl.Instrum.Methods Phys.Res. A754, 57 (2014)

J.M.Mueller, M.W.Ahmed, H.R.Weller

A novel method to assay special nuclear materials by measuring prompt neutrons from polarized photofission

NUCLEAR REACTIONS 232Th, 233,235,238U, 237Np, 239,240Pu(γ, F), E=5-7.5 MeV; analyzed available data; deduced polarization asymmetry, absolute uncertainty in the enrichment of a sample, a novel method of assaying the fissile and non-fissile content.

doi: 10.1016/j.nima.2014.03.042
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2014MY04      Phys.Rev. C 90, 027603 (2014)

L.S.Myers, M.W.Ahmed, G.Feldman, A.Kafkarkou, D.P.Kendellen, I.Mazumdar, J.M.Mueller, M.H.Sikora, H.R.Weller, W.R.Zimmerman

Compton scattering from 6Li at 86 MeV

NUCLEAR REACTIONS 6Li, 16O(polarized γ, γ), E=86 MeV; measured Eγ, Iγ, σ(θ) at HIγS facility at TUNL; deduced E1, E2, QD resonance parameters. GEANT4 simulations. Discussed nuclear polarizability. Comparison with earlier experimental results for 16O target.

doi: 10.1103/PhysRevC.90.027603
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0195.


2014WU05      Phys.Rev. C 90, 014613 (2014)

W.A.Wurtz, R.E.Pywell, B.E.Norum, S.Kucuker, B.D.Sawatzky, H.R.Weller, S.Stave, M.W.Ahmed

Photodisintegration of 6Li

NUCLEAR REACTIONS 6Li(polarized γ, p), (polarized γ, n), E=8, 9, 10, 11, 12, 13, 15, 15.6 MeV linearly polarized photons, and E=20, 25, 30, 35 MeV circularly polarized photons; measured En, In, time of flight spectra, σ(E) for (γ, n0), (γ, n1), (γ, n2), (γ, n3), (γ, p1), (γ, p2) and (γ, p3) reaction channels using HIγS facility at TUNL. Legendre function parametrizations, and GEANT4 simulation. Comparison with predictions of Lorentz integral transform calculation using AV4, MN, and MTI-III models.

doi: 10.1103/PhysRevC.90.014613
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0194.


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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2013KA48      Nucl.Instrum.Methods Phys.Res. B316, 48 (2013)

A.Kafkarkou, M.W.Ahmed, P.H.Chu, R.H.France, H.J.Karwowski, D.P.Kendellen, G.Laskaris, I.Mazumdar, J.M.Mueller, L.S.Myers, R.M.Prior, M.H.Sikora, M.C.Spraker, H.R.Weller, W.R.Zimmerman

Study of the 10B(p, α) reaction between 2.1 and 6.0 MeV

NUCLEAR REACTIONS 10B(p, α), E=2.1-6 MeV; measured reaction products, Eα, Iα; deduced σ(θ), S-factors and their uncertainties. Comparison with available data.

doi: 10.1016/j.nimb.2013.08.029
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2072.


2013LA14      Phys.Rev.Lett. 110, 202501 (2013)

G.Laskaris, Q.Ye, B.Lalremruata, Q.J.Ye, M.W.Ahmed, T.Averett, A.Deltuva, D.Dutta, A.C.Fonseca, H.Gao, J.Golak, M.Huang, H.J.Karwowski, J.M.Mueller, L.S.Myers, C.Peng, B.A.Perdue, X.Qian, P.U.Sauer, R.Skibinski, S.Stave, J.R.Tompkins, H.R.Weller, H.Witala, Y.K.Wu, Y.Zhang, W.Zheng

First Measurements of Spin-Dependent Double-Differential Cross Sections and the Gerasimov-Drell-Hearn Integrand from 3He(pol) (γ(pol), n)pp at Incident Photon Energies of 12.8 and 14.7 MeV

NUCLEAR REACTIONS 3He(polarized γ, n), E=12.8, 14.7 MeV; measured reaction products, En, In; deduced σ, σ(θ, E) and their uncertainties, contributions from the three-body photodisintegration to the 3He Gerasimov-Drell-Hearn integrand. Comparison with available data.

doi: 10.1103/PhysRevLett.110.202501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0181.


2013WE01      Acta Phys.Pol. B44, 587 (2013)

H.R.Weller, M.W.Ahmed, J.M.Mueller, L.S.Myers, W.R.Zimmerman, G.Feldman, M.H.Sikora

Precise Determination of the Isovector Giant Quadrupole Resonance in Nuclei

NUCLEAR REACTIONS 89Y, 209Bi(γ, γ'), E<36 MeV; measured reaction products, Eγ, Iγ; deduced polarization ratios, IVGQR parameters, Isovector E2 energy weighted sum rule, width, resonance parameters. 124Sn, 142Nd(γ, γ'), E not given; calculated yields.

doi: 10.5506/APhysPolB.44.587
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2013ZI03      Phys.Rev.Lett. 110, 152502 (2013)

W.R.Zimmerman, M.W.Ahmed, B.Bromberger, S.C.Stave, A.Breskin, V.Dangendorf, Th.Delbar, M.Gai, S.S.Henshaw, J.M.Mueller, C.Sun, K.Tittelmeier, H.R.Weller, Y.K.Wu

Unambiguous Identification of the Second 2+ State in 12C and the Structure of the Hoyle State

NUCLEAR REACTIONS 12C(γ, α)8Be, E=9.1-10.7 MeV; measured reaction products, Eα, Iα. 12C; deduced second 2+ Hoyle state, widths, B(E2). Comparison with available data.

doi: 10.1103/PhysRevLett.110.152502
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0180. Data from this article have been entered in the XUNDL database. For more information, click here.


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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2012MU01      Phys.Rev. C 85, 014605 (2012)

J.M.Mueller, M.W.Ahmed, B.Davis, J.M.Hall, S.S.Henshaw, M.S.Johnson, H.J.Karwowski, D.Markoff, L.S.Myers, B.A.Perdue, S.Stave, J.R.Tompkins, M.J.Tuffley, H.R.Weller

Measurement of prompt neutron polarization asymmetries in photofission of 235, 238U, 239Pu, and 232Th

NUCLEAR REACTIONS 232Th, 235,238U, 239Pu(polarized γ, F), E=5.6-7.3 MeV; measured neutron spectra, prompt fission neutron angular distributions polarization asymmetries using High Intensity γ-ray Source (HIγS). Comparison with simplified model of photofission.

doi: 10.1103/PhysRevC.85.014605
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0166.


2012MY05      Phys.Rev. C 86, 044614 (2012)

L.S.Myers, M.W.Ahmed, G.Feldman, S.S.Henshaw, M.A.Kovash, J.M.Mueller, H.R.Weller

Compton scattering from 6Li at 60 MeV

NUCLEAR REACTIONS 6Li, 16O(polarized γ, γ), E=60 MeV; measured Compton scattered γ spectra, angular distributions using High Intensity Gamma-Ray Source (HIγS) at TUNL facility; deduced Compton scattering σ(θ).

doi: 10.1103/PhysRevC.86.044614
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0177.


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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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0167.


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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2011HE18      Phys.Rev.Lett. 107, 222501 (2011)

S.S.Henshaw, M.W.Ahmed, G.Feldman, A.M.Nathan, H.R.Weller

New Method for Precise Determination of the Isovector Giant Quadrupole Resonances in Nuclei

NUCLEAR REACTIONS 209Bi(γ, γ), E=15-26 MeV; measured reaction products, Eγ, Iγ; deduced parameters of isovector giant quadrupole resonance (IVGQR).

doi: 10.1103/PhysRevLett.107.222501
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2011PE08      Phys.Rev. C 83, 034003 (2011)

B.A.Perdue, M.W.Ahmed, S.S.Henshaw, P.-N.Seo, S.Stave, H.R.Weller, P.P.Martel, A.Teymurazyan

Cross sections for the three-body photodisintegration of 3He at Eγ = 12.8, 13.5, and 14.7 MeV

NUCLEAR REACTIONS 3He(γ, n), E=12.8, 13.5, 14.7 MeV; measured En, In, angular distributions, TOF technique, absolute cross sections. Comparisons with phase-space calculations, and the state-of-the-art three-body calculations.

doi: 10.1103/PhysRevC.83.034003
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0158.


2011ST01      Phys.Lett. B 696, 26 (2011)

S.Stave, M.W.Ahmed, R.H.France III, S.S.Henshaw, B.Muller, B.A.Perdue, R.M.Prior, M.C.Spraker, H.R.Weller

Understanding the 11B(p, α)αα reaction at the 0.675 MeV resonance

NUCLEAR REACTIONS 11B(p, α), E=2.64 MeV; measured Eα, Iα, α-α coin.; deduced implications on reaction model, astrophysical reaction rates.

doi: 10.1016/j.physletb.2010.12.015
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2011WU06      Phys.Rev. C 84, 044601 (2011)

W.A.Wurtz, R.E.Pywell, B.E.Norum, S.Kucuker, B.D.Sawatzky, H.R.Weller, M.W.Ahmed, S.Stave

Measurement of the absolute and differential cross sections for 7Li(γ, n0)6Li

NUCLEAR REACTIONS 7Li(γ, n), E=10, 11, 12, 13, 15, 20, 25, 30, 35 MeV; 7Li(polarized γ, n), E=10-15 MeV; measured E(n), I(n), TOF spectra using High Intensity Gamma-Ray Source (HIGS); deduced absolute and differential cross sections, yields, associated Legendre polynomial expansion coefficients for 7Li(γ, n)6Li(g.s.) reaction channel.

doi: 10.1103/PhysRevC.84.044601
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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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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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2008AH01      Phys.Rev. C 77, 044005 (2008)

M.W.Ahmed, M.A.Blackston, B.A.Perdue, W.Tornow, H.R.Weller, B.Norum, B.Sawatzky, R.M.Prior, M.C.Spraker

Near-threshold deuteron photodisintegration: An indirect determination of the Gerasimov-Drell-Hearn sum rule and forward spin polarizability (γ0) for the deuteron at low energies

NUCLEAR REACTIONS 2H(polarized γ, n)p, E=2.44, 2.60, 2.72 MeV; measured analyzing power, σ, photon asymmetry, angular distributions, neutron spectra by time-of-flight; deduced Gerasimov-Drell-Hearn sum rule integrand and sum rule integrand for forward spin polarizability. Compared with theoretical predictions.

doi: 10.1103/PhysRevC.77.044005
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetL0137.


2008BL14      Phys.Rev. C 78, 034003 (2008); Publishers Note Phys.Rev. C 78, 069905 (2008)

M.A.Blackston, M.A.Ahmed, B.A.Perdue, H.R.Weller, B.Bewer, R.E.Pywell, W.A.Wurtz, R.Igarashi, S.Kucuker, B.Norum, K.Wang, J.Li, S.F.Mikhailov, V.G.Popov, Y.K.Wu, B.D.Sawatzky

First observation of the splittings of the E1 p-wave amplitudes in low energy deuteron photodisintegration and its implications for the Gerasimov-Drell-Hearn Sum Rule integrand

NUCLEAR REACTIONS 2H(polarized γ, n), E=14, 16 MeV; measured σ, σ(θ), linear analyzing power, phase shifts.

doi: 10.1103/PhysRevC.78.034003
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2008ST10      Phys.Rev. C 77, 054607 (2008)

S.Stave, M.W.Ahmed, A.J.Antolak, M.A.Blackston, A.S.Crowell, B.L.Doyle, S.S.Henshaw, C.R.Howell, P.Kingsberry, B.A.Perdue, P.Rossi, R.M.Prior, M.C.Spraker, H.R.Weller

Cross section measurements of the 10B(d, n0)11C reaction below 160 keV

NUCLEAR REACTIONS 10B(d, n)11C, E<160 keV; measured σ, astrophysical S factors, neutron spectra, angular distributions. Comparison with DWBA and Hauser-Feshbach calculations.

doi: 10.1103/PhysRevC.77.054607
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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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2006PA27      Phys.Rev. C 74, 015804 (2006); Erratum Phys.Rev. C 74, 029903 (2006)

Y.Parpottas, M.W.Ahmed, M.A.Blackston, R.H.France III, B.A.Perdue, R.M.Prior, A.Sabourov, M.C.Spraker, H.R.Weller

Astrophysical S factor for the 11B(d, n)12C reaction below 135 keV

NUCLEAR REACTIONS 11B(d, n), E=120-160 keV; measured En, yields, angular distributions; deduced astrophysical S-factors.

doi: 10.1103/PhysRevC.74.015804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1503.


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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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.


2003AH09      Phys.Rev. C 68, 064004 (2003)

M.W.Ahmed, X.Cui, A.Empl, E.V.Hungerford, K.J.Lan, M.Youn, R.E.Chrien, R.Gill, P.Pile, A.Rusek, R.Sutter, J.Bjoraker, D.Dehnhard, J.M.O'Donnell, J.Gerald, H.Juengst, J.H.Liu, J.C.Peng, C.L.Morris, C.M.Riedel, H.A.Thiessen, D.Androic, I.Bertovic, M.Furic, T.Petkovic, M.Planinic, L.Tang, V.Zeps

Experimental study of the 12C(K-stopped, π0)12ΛB reaction

NUCLEAR REACTIONS 12C(K-, π0), E at rest; measured pion spectra; deduced hypernucleus production ground and excited state branching ratios. 12B deduced hyperon binding energy.

doi: 10.1103/PhysRevC.68.064004
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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.


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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1999AH06      Phys.Lett. 465B, 297 (1999)

M.Ahmed, T.Gehrmann

Azimuthal Asymmetries in Hadronic Final States at HERA

NUCLEAR REACTIONS 1H(e, e'X), E=high; calculated hadron production asymmetries. Parton model.

doi: 10.1016/S0370-2693(99)01021-7
Citations: PlumX Metrics


1998AH06      Nuovo Cim. 111A, 113 (1998)

M.Ahmed, Md.A.E.Akhter, Md.A.Rahman, H.M.Sen Gupta, M.Rahman

Scattering of Pions from Light Nuclei

NUCLEAR REACTIONS 6Li, 12,14C, 13N(π+, π+), (π-, π-), E=100-280 MeV; 16O(π+, π+), E=114-343 MeV; analyzed σ(θ); deduced parameters. Generalized diffraction model.


1998AH08      Nucl.Phys. A639, 117c (1998)

M.W.Ahmed

Characteristics of an Active Chamber Target to Locate the Reaction Vertex in the (K-stopped, π0) Reaction

doi: 10.1016/S0375-9474(98)00259-0
Citations: PlumX Metrics


1997AH09      Nuovo Cim. 110A, 1393 (1997)

M.Ahmed, Md.A.Rahman, H.M.Sen Gupta

Scattering of Pions from 90Zr and 118Sn Around the Δ Resonance

NUCLEAR REACTIONS 90Zr, 118Sn(π+, π+), (π+, π+'), (π-, π-), (π-, π-'), E=163 MeV; analyzed σ(θ); deduced interaction radius, surface diffuseness, deformation parameters. Generalized diffraction model.


1995AM08      Hyperfine Interactions 96, 91 (1995)

M.A.Amer, M.A.Ahmed, M.K.El-Nimr, M.A.Mostafa

Mossbauer and Infrared Studies of the Cu-Cr Ferrites

NUCLEAR REACTIONS 57Fe(γ, γ), E=14.4 keV; measured Mossbauer spectra; deduced Cr substitution variation effect on hyperfine interactions. CuCr(x)Fe(2-x)O4 system ferrites, x=0, 0.2, 0.4, 0.6, 0.8. Infrared absorption spectra also studied.

doi: 10.1007/BF02066275
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1987KH03      Nucl.Instrum.Methods Phys.Res. B22, 541 (1987)

H.A.Khan, F.R.Khan, N.A.Khan, M.Ahmed, M.A.Baig

Elastic and Inelastic Scattering of 8.5 MeV/Nucleon 132Xe Ions By Uranium Atoms

NUCLEAR REACTIONS U(132Xe, 132Xe), (132Xe, 132Xe'), E=8.5 MeV/nucleon; measured σ; deduced grazing angular momentum, interaction radius, reaction σ. Track detectors.

doi: 10.1016/0168-583X(87)90158-3
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1985ZH05      Phys.Rev. C31, 1941 (1985)

Z.Y.Zhou, E.C.Schloemer, M.D.Cable, M.Ahmed, J.E.Reiff, J.Cerny

Additional Beta-Delayed Protons form the T(z) = -(3/2) Nuclei 21Mg, 25Si, 29S, and 41Ti

RADIOACTIVITY 21Mg, 25Si, 29S, 41Ti(β+p) [from 20Ne, 24Mg, 28Si, 40Ca(3He, 2n), E=31.5-41.5 MeV]; measured β-delayed Ep, Ip; deduced log ft. 21Na, 25Al, 29P, 41Sc levels deduced relative Ip.

doi: 10.1103/PhysRevC.31.1941
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1984CA29      Phys.Rev. C30, 1276 (1984)

M.D.Cable, J.Honkanen, E.C.Schloemer, M.Ahmed, J.E.Reiff, Z.Y.Zhou, J.Cerny

Beta-Delayed Two-Proton Decays of 22Al and 26P

RADIOACTIVITY 22Al(β+p) [from 24Mg(3He, p4n)]; 26P(β+p) [from 28Si(3He, p4n)]; measured beta-delayed two-proton pp-coin, Ep. 21Na, 25Al deduced levels, p-branching.

doi: 10.1103/PhysRevC.30.1276
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1982AH02      Phys.Rev. C25, 833 (1982)

M.U.Ahmed, W.P.Beres, T.L.Larry

Inelastic Light Ion Scattering and Application to 12C + 12C

NUCLEAR REACTIONS 12C(12C, 12C'), E(cm)=10-30 MeV; calculated σ(E). Projector operator method, broad, intermediate structures.

doi: 10.1103/PhysRevC.25.833
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1982AH03      Phys.Rev. C25, 1058 (1982)

M.U.Ahmed, W.P.Beres

Cross Section for 12C + 12C → 12C(0+2) + 12C(g.s.) using Breathing Mode Doorways

NUCLEAR REACTIONS, ICPND 12C(12C, 12C'), E(cm)=10-30 MeV; calculated σ(E). 24Mg deduced resonances, J, π, escape width. Projection operator technique, breathing mode doorways.

doi: 10.1103/PhysRevC.25.1058
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1979AH07      Nucl.Phys. A332, 289 (1979)

M.U.Ahmed, P.E.Shanley

Level Parameters of the Isospin-Mixed 2+ Doublet in 8Be

NUCLEAR REACTIONS 4He(α, α), E=30-35 MeV; calculated L=2 phase shifts. 8Be resonances deduced Γ, pole positions, mixing parameters.

doi: 10.1016/0375-9474(79)90003-4
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1978AH01      Phys.Rev. C17, 1505 (1978)

M.U.Ahmed, P.E.Shanley

Pole Positions of 5He Resonances from Various Models of the n-4He Interaction

NUCLEAR STRUCTURE 5He; calculated resonance poles from n+α interaction.

doi: 10.1103/PhysRevC.17.1505
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1978DE41      Atlas of Gamma-Ray Spectra from the Inelastic Scattering of Reactor Fast Neutrons, Part I and II, Atomizdat, Moscow (1978)

A.M.Demidov, I.Govor, Yu.K.Cherepantsev, M.R.Ahmed, S.Al-Najjar, M.A.Al-Amili, N.Al-Assafi, N.Rammo

COMPILATION Z=3-92; compiled experimental values of Eγ, Iγ, decay schemes, energy levels.


1977AV02      Izv.Akad.Nauk SSSR, Ser.Fiz. 41, 76 (1977); Bull.Acad.Sci.USSR, Phys.Ser. 41, No.1, 60 (1977)

V.D.Avchukhov, M.R.Ahmed, A.Al-Amili, N.Al-Assafi, S.Al-Najjar, K.A.Baskova, A.B.Vovk, L.I.Govor, A.M.Demidov

Deexcitation of 133Cs Levels Excited in the (n, n'γ) Reaction

NUCLEAR REACTIONS 133Cs(n, n'γ), E=fast reactor-neutrons; measured Eγ, Iγ, Iγ(θ). 133Cs deduced levels, J, π, γ-branching.


1975AH07      Nuovo Cim. 30A, 385 (1975)

A.A.Z.Ahmad, S.Ali, N.Ferdous, M.Ahmed

Nonlocal Separable Potential and p-α Scattering

NUCLEAR REACTIONS 4He(p, p), E < 18 MeV; calculated potential.

doi: 10.1007/BF02730294
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1975DE01      Nucl.Phys. A237, 125 (1975)

A.M.Demidov, M.R.Ahmed, S.Al-Najjar, M.A.Al-Amili, N.Al-Assafi

The Spectrum of γ-Rays from the 182W(n, n'γ) Reaction with Reactor Fast Neutrons

NUCLEAR REACTIONS W, 182W(n, n'γ), E=fast reactor spectrum; measured Eγ, Iγ. 182W deduced levels, K, J, π, γ-branching ratio. Natural, enriched targets.

doi: 10.1016/0375-9474(75)90467-4
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1975GO11      Nucl.Phys. A245, 13 (1975)

L.I.Govor, A.M.Demidov, I.B.Shukalov, M.R.Ahmed, K.I.Shakarchi, S.Al-Najjar, M.A.Al-Amili, N.Al-Assafi

On Level Population in 108,110Pd in the Inelastic Scattering of Reactor Fast Neutrons

NUCLEAR REACTIONS 108,110Pd(n, n'γ), E=reactor fast neutrons; measured Eγ, Iγ. 108,110Pd deduced levels, J, level populations.

doi: 10.1016/0375-9474(75)90079-2
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1974AH01      Nucl.Instrum.Methods 117, 533 (1974)

M.R.Ahmed, K.I.Shakarchi, S.Al-Najjar, M.A.Al-Amili, L.I.Govor, A.M.Demidov

Investigation of Gamma-Ray Spectra from the Inelastic Scattering of Reactor Fast Neutrons

NUCLEAR REACTIONS 54,56,57Fe, 93Nb, 106Pd, 27Al(n, n'γ), E=reactor; measured Eγ, Iγ. 54,56,57Fe, 93Nb, 106Pd, 27Al deduced levels. Mn, Ge, Sn, La, Ta, Au, Pb, Bi, Th, 104,105,108,110Pd, 116,118,120,122,124Sn, 182W(n, n'γ); measured Eγ, Iγ. Results not reported.

doi: 10.1016/0029-554X(74)90302-4
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1972JO06      Nucl.Phys. A188, 600 (1972)

K.Johansson, E.Karlsson, L.-O.Norlin, R.A.Windahl, M.R.Ahmed

g-Factor Experiments on the First Excited 2+ States in 102Ru, 106Pd and 110Cd

RADIOACTIVITY 102Rh, 106Rh, 110Ag; measured γγ(θ, H). 102Ru, 106Pd, 110Cd first excited 2+ states deduced g.

NUCLEAR MOMENTS 102Ru, 106Pd, 110Cd levels measured g.

doi: 10.1016/0375-9474(72)90222-9
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1970AH03      Nucl.Phys. A147, 273 (1970)

M.Ahmed, J.Lowe, P.M.Rolph, O.Karban

Differential Cross Sections, Polarisations and Proton-Gamma Angular Correlations for 54Fe, 60Ni(p, p) and (p, p'γ) at 10 MeV

NUCLEAR REACTIONS 54Fe, 60Ni(p, p), (polarized p, p), E=10 MeV; measured σ(θ), P(θ). 54Fe, 60Ni(p, p'γ), (polarized p, p'γ), E=10 MeV; measured σ(θ(p')), p'γ(θ), proton asymmetry (θ(p')). Enriched targets.

doi: 10.1016/0375-9474(70)90267-8
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1970RA27      Nuovo Cimento 68A, 397 (1970)

M.Rahman, M.U.Ahmed, H.M.Sen Gupta

Strong-Absorption Model for Scattering of Helions and Tritons

NUCLEAR REACTIONS 24Mg(3He, 3He'), E=29 MeV; 56,58Fe, 58Ni(3He, 3He'), E=22 MeV; measured nothing; analyzed σ(θ) data. 24Mg, 56,58Fe, 58Ni deduced deformation parameters β2.


1969AH04      Nucl.Sci.Appl. 5, 18 (1969)

M.Ahmed

Proton Spin Flip in Inelastic Scattering

NUCLEAR REACTIONS 54Fe(p, p'), 60Ni(p, p'), E=10 MeV; measured spin-flip probabilities.


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Note: The following list of authors and aliases matches the search parameter M.Ahmed: , M.A.AHMED, M.R.AHMED, M.U.AHMED, M.W.AHMED