NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = K.B.Howard Found 12 matches. 2022FR09 Phys.Rev. C 106, 065803 (2022) B.Frentz, A.Aprahamian, A.Boeltzig, T.Borgwardt, A.M.Clark, R.J.deBoer, G.Gilardy, J.Gorres, M.Hanhardt, S.L.Henderson, K.B.Howard, T.Kadlecek, Q.Liu, K.T.Macon, S.Moylan, C.S.Reingold, D.Robertson, C.Seymour, S.Y.Strauss, F.Strieder, B.Vande Kolk, M.Wiescher Investigation of the 14N(p, γ)15O reaction and its impact on the CNO cycle NUCLEAR REACTIONS 14N(p, γ), E=0.27-1.07 MeV; measured Eγ, Iγ; deduced σ(θ, E) for particular transitions in daughter nuclei, astrophysical differential and total S-factor, astrophysical reaction rate for T=0.01-10 GK. Multichannel R-matrix analysis for the transition to the ground state, the excited states at 6.17 and 6.79 MeV, as well as 14N(p, p) differential scattering data. Discussed implication of the obtained data on the CNO neutrino production. Comparison to other experimental results. Single coaxial HPGe detector. Beam from 1 MV JN Van de Graaff at the Compact Accelerator System for Performing Astrophysical Research (CASPAR) at the Sanford Underground Research Facility.
doi: 10.1103/PhysRevC.106.065803
2022VA04 Phys.Rev. C 105, 055802 (2022) B.Vande Kolk, K.T.Macon, R.J.deBoer, T.Anderson, A.Boeltzig, K.Brandenburg, C.R.Brune, Y.Chen, A.M.Clark, T.Danley, B.Frentz, R.Giri, J.Gorres, M.Hall, S.L.Henderson, E.Holmbeck, K.B.Howard, D.Jacobs, J.Lai, Q.Liu, J.Long, K.Manukyan, T.Massey, M.Moran, L.Morales, D.Odell, P.O'Malley, S.N.Paneru, A.Richard, D.Schneider, M.Skulski, N.Sensharma, C.Seymour, G.Seymour, D.Soltesz, S.Strauss, A.Voinov, L.Wustrich, M.Wiescher Investigation of the 10B (p, α)7Be reaction from 0.8 to 2.0 MeV NUCLEAR REACTIONS 10B(p, α), (p, p), E=0.8-2.0 MeV; measured Eα, Iα, Ep, Ip; deduced σ(θ), σ(E) S-factor, resonance parameters of 10B+p system - energy, spin, partial (p0, α0, α1) and total width. 10B(p, γ), E=0 .1-2.0 MeV; deduced σ(θ). 11C; deduced levels, J, π. R-matrix analysis. Measurements were made at the University of Notre Dame (UND) Nuclear Science Laboratory (NSL) using a degrader foil method, while those at the Edwards AcceleratorLaboratory at Ohio University (OU) were performed using the time-of-flight (ToF)technique. Comparison with other experimental data.
doi: 10.1103/PhysRevC.105.055802
2021FR05 Phys.Rev. C 103, 045802 (2021) B.Frentz, A.Aprahamian, A.M.Clark, R.J.deBoer, C.Dulal, J.D.Enright, J.Gorres, S.L.Henderson, J.D.Hinnefeld, K.B.Howard, R.Kelmar, K.Lee, L.Morales, S.Moylan, Z.Rahman, W.Tan, L.E.Weghorn, M.Wiescher Lifetime measurements of excited states in 15O NUCLEAR REACTIONS 14N(p, γ)15O, E=1020, 1570 keV; measured Eγ, Iγ, half-lives of 5.18-, 6.17- and 6.79-MeV levels in 15O by Doppler-shift attenuation method (DSAM) using three separate, nitrogen-implanted targets with Mo, Ta, and W backings at the Nuclear Science Laboratory (NSL) of University of Notre Dame. Comparison with previous half-life measurements. Monte Carlo simulations of Doppler-shift attenuation factors. R-matrix analysis of asymptotic normalization constants (ANCs) and radiative widths Γγ using AZURE2 code for g.s. and levels between 6793 and 9609 keV, including half-lives measured in the present work and experimental data in literature. Relevance to CNO chain of reactions and uncertainty in the 14N(p, γ)15O reaction rate.
doi: 10.1103/PhysRevC.103.045802
2020GU11 Phys.Lett. B 806, 135473 (2020) Y.K.Gupta, B.K.Nayak, U.Garg, K.Hagino, K.B.Howard, N.Sensharma, M.Senyigit, W.P.Tan, P.D.O'Malley, M.Smith, R.Gandhi, T.Anderson, R.J.deBoer, B.Frentz, A.Gyurjinyan, O.Hall, M.R.Hall, J.Hu, E.Lamere, Q.Liu, A.Long, W.Lu, S.Lyons, K.Ostdiek, C.Seymour, M.Skulski, B.Vande Kolk Determination of hexadecapole (β4) deformation of the light-mass nucleus 24Mg using quasi-elastic scattering measurements NUCLEAR REACTIONS 90Zr(16O, 16O), (24Mg, 24Mg), E=61 MeV; measured reaction products. 24Mg; deduced deformation parameters, σ, B(Eλ). CCFULL calculations.
doi: 10.1016/j.physletb.2020.135473
2020HO01 Phys.Lett. B 801, 135185 (2020) K.B.Howard, U.Garg, M.Itoh, H.Akimune, S.Bagchi, T.Doi, Y.Fujikawa, M.Fujiwara, T.Furuno, M.N.Harakeh, Y.Hijikata, K.Inaba, S.Ishida, N.Kalantar-Nayestanaki, T.Kawabata, S.Kawashima, K.Kitamura, N.Kobayashi, Y.Matsuda, A.Nakagawa, S.Nakamura, K.Nosaka, S.Okamoto, S.Ota, S.Weyhmiller, Z.Yang Compression-mode resonances in the calcium isotopes and implications for the asymmetry term in nuclear incompressibility NUCLEAR REACTIONS 40,42,44,48Ca(α, α'), E=386 MeV; measured reaction products, Eα, Iα; deduced positive value for the asymmetry term in the nuclear incompressibility. Isoscalar giant monopole resonance (ISGMR).
doi: 10.1016/j.physletb.2019.135185
2020HO11 Phys.Lett. B 807, 135608 (2020) K.B.Howard, U.Garg, M.Itoh, H.Akimune, M.Fujiwara, T.Furuno, Y.K.Gupta, M.N.Harakeh, K.Inaba, Y.Ishibashi, K.Karasudani, T.Kawabata, A.Kohda, Y.Matsuda, M.Murata, S.Nakamura, J.Okamoto, S.Ota, J.Piekarewicz, A.Sakaue, M.Senyigit, M.Tsumura, Y.Yang Compressional-mode resonances in the molybdenum isotopes: Emergence of softness in open-shell nuclei near A = 90 NUCLEAR REACTIONS 94,96,98,100Mo(α, α'), E=386 MeV; measured reaction products, Eα, Iα; deduced σ(θ, E), isoscalar giant monopole resonance (ISGMR) strength distributions within the MDA framework, softness in the molybdenum isotopes. Comparison with relativistic, self-consistent Random-Phase Approximation calculations.
doi: 10.1016/j.physletb.2020.135608
2020SE02 Phys.Rev.Lett. 124, 052501 (2020) N.Sensharma, U.Garg, Q.B.Chen, S.Frauendorf, D.P.Burdette, J.L.Cozzi, K.B.Howard, S.Zhu, M.P.Carpenter, P.Copp, F.G.Kondev, T.Lauritsen, J.Li, D.Seweryniak, J.Wu, A.D.Ayangeakaa, D.J.Hartley, R.V.F.Janssens, A.M.Forney, W.B.Walters, S.S.Ghugre, R.Palit Longitudinal Wobbling Motion in 187Au NUCLEAR REACTIONS 174Yb(19F, X)187Au, E=105, 115 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, yrast band, B(M1)/B(E2). Comparison with PRM calculations.
doi: 10.1103/PhysRevLett.124.052501
2020TA08 Phys.Rev.Lett. 124, 192702 (2020) W.P.Tan, A.Boeltzig, C.Dulal, R.J.deBoer, B.Frentz, S.Henderson, K.B.Howard, R.Kelmar, J.J.Kolata, J.Long, K.T.Macon, S.Moylan, G.F.Peaslee, M.Renaud, C.Seymour, G.Seymour, B.Vande Kolk, M.Wiescher, E.F.Aguilera, P.Amador-Valenzuela, D.Lizcano, E.Martinez-Quiroz New Measurement of 12C+12C Fusion Reaction at Astrophysical Energies NUCLEAR REACTIONS 12C(12C, X), E(cm)=2.2-5.0 MeV; measured reaction products, Eγ, Iγ; deduced σ, S-factor. Comparison with available data.
doi: 10.1103/PhysRevLett.124.192702
2019HO17 Eur.Phys.J. A 55, 228 (2019) K.B.Howard, U.Garg, Y.K.Gupta, M.N.Harakeh Where we stand on structure dependence of ISGMR in the Zr-Mo region: Implications on K∞
doi: 10.1140/epja/i2019-12762-x
2019SE06 Phys.Lett. B 792, 170 (2019), Erratum Phys.Lett. B 820, 136556 (2021) N.Sensharma, U.Garg, S.Zhu, A.D.Ayangeakaa, S.Frauendorf, W.Li, G.H.Bhat, J.A.Sheikh, M.P.Carpenter, Q.B.Chen, J.L.Cozzi, S.S.Ghugre, Y.K.Gupta, D.J.Hartley, K.B.Howard, R.V.F.Janssens, F.G.Kondev, T.C.McMaken, R.Palit, J.Sethi, D.Seweryniak, R.P.Singh Two-phonon wobbling in 135Pr NUCLEAR STRUCTURE 135Pr; analyzed available data; deduced wobbling. Comparison with theoretical calculations in the framework of the quasiparticle triaxial rotor and triaxial projected shell models.
doi: 10.1016/j.physletb.2019.03.038
2018GU05 Phys.Rev. C 97, 064323 (2018) Y.K.Gupta, K.B.Howard, U.Garg, J.T.Matta, M.Senyigit, M.Itoh, S.Ando, T.Aoki, A.Uchiyama, S.Adachi, M.Fujiwara, C.Iwamoto, A.Tamii, H.Akimune, C.Kadono, Y.Matsuda, T.Nakahara, T.Furuno, T.Kawabata, M.Tsumura, M.N.Harakeh, N.Kalantar-Nayestanaki Isoscalar giant monopole, dipole, and quadrupole resonances in 90, 92Zr and 92Mo NUCLEAR REACTIONS 90,92Zr, 92Mo(α, α'), (α, α), E=385 MeV; measured Eα, α(θ), double differential σ(E, θ) using Grand Raiden spectrometer of RCNP; deduced energies, widths, EWSR and moment ratios for isoscalar giant monopole (ISGMR), dipole (ISGDR), and quadrupole (ISGQR) strength distributions, Lorentzian parameters of distributions, collective structures not influenced by nuclear shell structure near A=90. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.97.064323
2016GU13 Phys.Lett. B 760, 482 (2016) Y.K.Gupta, U.Garg, K.B.Howard, J.T.Matta, M.Senyigit, M.Itoh, S.Ando, T.Aoki, A.Uchiyama, S.Adachi, M.Fujiwara, C.Iwamoto, A.Tamii, H.Akimune, C.Kadono, Y.Matsuda, T.Nakahara, T.Furuno, T.Kawabata, M.Tsumura, M.N.Harakeh, N.Kalantar-Nayestanaki Are there nuclear structure effects on the isoscalar giant monopole resonance and nuclear incompressibility near A ∼ 90? NUCLEAR REACTIONS 90,92Zr, 92Mo(α, α'), E=385 MeV; measured reaction products, Eα, Iα; deduced σ(θ, E), isoscalar giant monopole resonance strength distributions.
doi: 10.1016/j.physletb.2016.07.021
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