NSR Query Results
Output year order : Descending NSR database version of April 25, 2024. Search: Author = M.Ahmed Found 80 matches. 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
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
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
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
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
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
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
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
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
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 Γ3α 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
1999AH06 Phys.Lett. 465B, 297 (1999) 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
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) 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
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
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
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
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
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
1982AH03 Phys.Rev. C25, 1058 (1982) 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
1979AH07 Nucl.Phys. A332, 289 (1979) 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
1978AH01 Phys.Rev. C17, 1505 (1978) 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
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
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
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
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
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
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
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) Proton Spin Flip in Inelastic Scattering NUCLEAR REACTIONS 54Fe(p, p'), 60Ni(p, p'), E=10 MeV; measured spin-flip probabilities.
Back to query form 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 |