NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = J.D.Malcolm Found 17 matches. 2020GR08 J.Phys.(London) G47, 085104 (2020) M.R.Griffiths, C.Wheldon, Tz.Kokalova, A.Turner, S.Pirrie, V.Ziman, N.I.Ashwood, J.D.Malcolm, M.Barr, M.Freer, Th.Faestermann, H-F.Wirth, R.Hertenberger, R.Gernhauser, R.Krucken Mass measurement of Re-190 NUCLEAR REACTIONS 192Os, 194Pt(d, α)190Re/192Ir, E=18 MeV; measured Eα, Iα using Q3D magnetic spectrograph at MLL-Munich tandem Van de Graaff accelerator facility. 190Re, 192Ir; deduced levels, J, π. ATOMIC MASSES 190Re; deduced mass excess, atomic mass and binding energy. Comparison with values in AME2016.
doi: 10.1088/1361-6471/ab98e3
2016CU02 Phys.Rev. C 94, 034313 (2016) N.Curtis, S.Almaraz-Calderon, A.Aprahamian, N.I.Ashwood, M.Barr, B.Bucher, P.Copp, M.Couder, X.Fang, M.Freer, G.Goldring, F.Jung, S.R.Lesher, W.Lu, J.D.Malcolm, A.Roberts, W.P.Tan, C.Wheldon, V.A.Ziman 8Be + 8Be and 12C + α breakup states in 16O populated via the 13C(4He, 4α)n reaction NUCLEAR REACTIONS 13C(α, 16O), E=22.0, 27.0, 27.5, 28.0 MeV; measured reaction products using four position-sensitive double-sided Si strip detectors, at Notre Dame FN Tandem accelerator facility. 16O; deduced levels identified through the 8Be+8Be and 12C*+α channels, J, π, centroids, cross sections. Comparison with previous studies using 12C(α, 8Be)8Be and 12C(16O, 4α)12C reactions. Relevance to 4α chain structure in 16O.
doi: 10.1103/PhysRevC.94.034313
2016SM02 Phys.Rev. C 94, 014320 (2016) R.Smith, C.Wheldon, M.Freer, N.Curtis, Tz.Kokalova, S.Almaraz-Calderon, A.Aprahamian, N.I.Ashwood, M.Barr, B.Bucher, P.Copp, M.Couder, X.Fang, G.Goldring, F.Jung, S.R.Lesher, W.Lu, J.D.Malcolm, A.Roberts, W.P.Tan, V.A.Ziman Evidence for a 3.8 MeV state in 9Be NUCLEAR REACTIONS 9Be(α, n3α), E=22, 26 MeV; measured Eα, Iα using an array of double-sided silicon strip detectors (DSSSDs) at the Notre Dame FN Tandem Van de Graaff accelerator facility; extracted sum energy spectra for all four final-state particles, assumed to be 3α+n, 9Be excitation spectrum. 9Be; deduced levels, new state at 3.8 MeV, J, π, width, ratios of reduced widths to Wigner limits (decays to 8Be ground state). 9Be, 9B; comparison of levels and widths in mirror nuclei.
doi: 10.1103/PhysRevC.94.014320
2015WH01 Phys.Rev. C 91, 024308 (2015) C.Wheldon, Tz.Kokalova, M.Freer, J.Walshe, R.Hertenberger, H.-F.Wirth, N.I.Ashwood, M.Barr, N.Curtis, Th.Faestermann, R.Lutter, J.D.Malcolm, D.J.Marin-Lambarri Spectroscopy of 9B via high-resolution ejectile-tagged recoil break-up NUCLEAR REACTIONS 9Be(3He, t)9B*, E=33 MeV; measured particle spectra, (9B breakup products)(triton)-coin using Munich-Q3D spectrograph at the MLL tandem Van de Graaff accelerator facility. 9B; deduced levels, J, π, total and partial widths for 8Be+p and 5Li+α channels. Comparison with earlier experimental results.
doi: 10.1103/PhysRevC.91.024308
2014FR14 Phys.Rev. C 90, 054324 (2014) M.Freer, J.D.Malcolm, N.L.Achouri, N.I.Ashwood, D.W.Bardayan, S.M.Brown, W.N.Catford, K.A.Chipps, J.Cizewski, N.Curtis, K.L.Jones, T.Munoz-Britton, S.D.Pain, N.Soic, C.Wheldon, G.L.Wilson, V.A.Ziman Resonances in 14C observed in the 4He(10Be, α)10Be reaction NUCLEAR REACTIONS 4He(10Be, α), E=25, 27, 29, 32, 34, 38, 40, 44, 48 MeV; measured Eα, Iα, resonant scattering yields, angular distributions at HRIBF-ORNL accelerator facility. 14C; deduced levels, resonances, J, π, widths using R-matrix analysis, 10Be+α cluster bands; compiled data on α-decaying resonances from 14.3 to 25.0 MeV excitation energy from the present and previous experiments.
doi: 10.1103/PhysRevC.90.054324
2013CU04 Phys.Rev. C 88, 064309 (2013) N.Curtis, S.Almaraz-Calderon, A.Aprahamian, N.I.Ashwood, M.Barr, B.Bucher, P.Copp, M.Couder, X.Fang, M.Freer, G.Goldring, F.Jung, S.R.Lesher, W.Lu, J.D.Malcolm, A.Roberts, W.P.Tan, C.Wheldon, V.A.Ziman Investigation of the 4α linear chain state in 16O NUCLEAR REACTIONS 12C(α, 8Be)8Be, (α, 12C), [12C* decaying to 8Be+α], E=12.2-20.0 MeV; measured Eα, Iα, α(θ), αα-coin, σ(E, θ) at Notre Dame FN tandem facility. Phase shift analysis of σ(θ) data. 16O; deduced levels, resonances, J. Comparison with previous experimental results. No evidence found for rigid, 4α-linear chain in 16O.
doi: 10.1103/PhysRevC.88.064309
2013KO15 Phys.Rev. C 87, 057309 (2013) Tz.Kokalova, M.Freer, N.Curtis, N.I.Ashwood, M.Barr, J.D.Malcolm, C.Wheldon, V.A.Ziman, S.Almaraz-Calderon, A.Aprahamian, B.Bucher, M.Couder, X.Fang, F.Jung, W.Lu, A.Roberts, W.P.Tan, P.Copp, S.R.Lesher Yield measurements for resonances above the multi-α threshold in 20Ne NUCLEAR REACTIONS 16O(α, X), E=23.0-29.0 MeV; measured α and particle spectra, (particle)(particle)α-coin, yields for 8Be+8Be+α, and 8Be+12C(second 0+) channels. Measurements at Notre Dame facility. 20Ne; deduced levels, resonances, J. Monte Carlo simulations.
doi: 10.1103/PhysRevC.87.057309
2012CU04 J.Phys.:Conf.Ser. 381, 012079 (2012) N.Curtis, S.Almaraz-Calderon, A.Aprahamian, N.I.Ashwood, M.Barr, B.Bucher, P.Copp, M.Couder, X.Fang, M.Freer, G.Goldring, F.Jung, S.R.Lesher, W.Lu, J.D.Malcolm, A.Roberts, W.P.Tan, C.Wheldon, V.A.Ziman Does a 4-α linear chain exist in 16O? NUCLEAR REACTIONS 12C(α, 8Be), E=12.2-20.0 MeV; measured Eα, Iα from 8Be decay using DSSSD; deduced σ(θ=900), doublet 6+ resonance and its components.
doi: 10.1088/1742-6596/381/1/012079
2012FR01 Phys.Rev. C 85, 014304 (2012) M.Freer, N.L.Achouri, C.Angulo, N.I.Ashwood, D.W.Bardayan, S.Brown, W.N.Catford, K.A.Chipps, N.Curtis, P.Demaret, C.Harlin, B.Laurent, J.D.Malcolm, M.Milin, T.Munoz-Britton, N.A.Orr, S.D.Pain, D.Price, R.Raabe, N.Soic, J.S.Thomas, C.Wheldon, G.Wilson, V.A.Ziman Resonances in 11C observed in the 4He(7Be, α)7Be and 4He(7Be, p)10B reactions NUCLEAR REACTIONS 4He(7Be, α), (7Be, p), E=7.1, 23 MeV; measured α and proton spectra, time of flight, cross section. 11C; deduced resonances, levels, J, π, width, α width, p width, R-Matrix analysis. Comparison of partial widths with Wigner limit, evidence of cluster-like structures. Comparison of level structures and analog states of 11C and 11B.
doi: 10.1103/PhysRevC.85.014304
2012FR11 J.Phys.:Conf.Ser. 381, 012009 (2012) M.Freer, S.Almaraz-Calderon, J.Carter, A.Aprahamian, N.I.Ashwood, M.Barr, B.Bucher, P.Copp, M.Couder, N.Curtis, X.Fang, F.Jung, S.Lesher, W.Lu, J.D.Malcolm, A.Roberts, R.Smit, W.P.Tan, C.Wheldon, V.A.Ziman Simplicity from Complexity
doi: 10.1088/1742-6596/381/1/012009
2012MA66 J.Phys.:Conf.Ser. 381, 012077 (2012) J.D.Malcolm, M.Freer, N.I.Ashwood, N.Curtis, T.Munoz-Britton, C.Wheldon, V.A.Ziman, W.N.Catford, S.Brown, G.Wilson, N.Soic, D.Bardayan, S.D.Pain, N.L.Achouri, K.Chipps, K.Crzywacz-Jones Study of states in 14C via the 10Be(4He, 4He)10Be reaction NUCLEAR REACTIONS 10Be(α, α), E=25.0, 27.0, 29.0, 32.0, 34.0, 38.0, 40.0, 42.0, 44.0, 46.0 MeV; measured resonance scattering products. 14C deduced possible molecular rotational bands, energy, J, π.
doi: 10.1088/1742-6596/381/1/012077
2012WH01 Phys.Rev. C 86, 044328 (2012) C.Wheldon, N.I.Ashwood, M.Barr, N.Curtis, M.Freer, Tz.Kokalova, J.D.Malcolm, V.A.Ziman, Th.Faestermann, H.-F.Wirth, R.Hertenberger, R.Lutter Absolute partial decay-branch measurements in 13C NUCLEAR REACTIONS 9Be(6Li, d)13C*, E=42 MeV; measured deuteron, neutron and α spectra from breakup of 13C, (particle)(particle)-coin, absolute partial branching ratios for neutron and α decays, widths using Q3D magnetic spectrograph at MLL, Munich facility. 13C; deduced levels, J, π, branching ratios, reduced widths, molecular band levels. Comparison with previous studies.
doi: 10.1103/PhysRevC.86.044328
2012WH02 J.Phys.:Conf.Ser. 381, 012078 (2012) C.Wheldon, N.I.Ashwood, M.Barr, N.Curtis, M.Freer, Tz.Kokalova, J.D.Malcolm, S.J.Spencer, V.A.Ziman, Th.Faestermann, R.Krucken, H.-F.Wirth, R.Hertenberger, R.Lutter, A.Bergmaier Absolute decay width measurements in 16O NUCLEAR REACTIONS 12C(6Li, d), E=42 MeV; measured E(deuteron), I(deuteron) using high-resolution Q3D spectrograph, recoil products, break-up products. 16O deduced α decay width of excited states between 13.9 and 15.9 MeV, relative and absolute α-decay width.
doi: 10.1088/1742-6596/381/1/012078
2011FR02 Phys.Rev. C 83, 034314 (2011) M.Freer, S.Almaraz-Calderon, A.Aprahamian, N.I.Ashwood, M.Barr, B.Bucher, P.Copp, M.Couder, N.Curtis, X.Fang, F.Jung, S.Lesher, W.Lu, J.D.Malcolm, A.Roberts, W.P.Tan, C.Wheldon, V.A.Ziman Evidence for a new 12C state at 13.3 MeV NUCLEAR REACTIONS 9Be, 12C(α, 3α), E=22-30 MeV; measured Eα, Iα, 12C-α angular correlations; deduced Dalitz plot. 12C; deduced levels, J, π, width. Possible collective excitation of Hoyle state.
doi: 10.1103/PhysRevC.83.034314
2011FR14 J.Phys.(London) G38, 115106 (2011) M.Freer, N.I.Ashwood, M.Barr, N.Curtis, J.Gibelin, F.Haas, J.D.Malcolm, T.Munoz-Britton, G .Randisi, N.Soic, V.A.Ziman Access to resonant states in 24Mg using the 12C(13C, 4He+20Ne)n reaction NUCLEAR REACTIONS 12C(13C, n), (13C, α), E=12, 13.5, 20 MeV; measured reaction products. 25Mg; deduced 24Mg excited states from neutron evaporation in compound nucleus.
doi: 10.1088/0954-3899/38/11/115106
2011WH01 Phys.Rev. C 83, 064324 (2011) C.Wheldon, N.I.Ashwood, M.Barr, N.Curtis, M.Freer, Tz.Kokalova, J.D.Malcolm, S.J.Spencer, V.A.Ziman, Th.Faestermann, R.Krucken, H.-F.Wirth, R.Hertenberger, R.Lutter, A.Bergmaier High-resolution measurement of absolute α-decay widths in 16O NUCLEAR REACTIONS 12C(6Li, d)16O, E=42 MeV; measured deuteron and α spectra, (4He+12C)d-coin. 16O; deduced levels, α decay widths. Cluster structures in 16O.
doi: 10.1103/PhysRevC.83.064324
2010FR04 J.Phys.(London) G37, 125102 (2010) M.Freer, N.I.Ashwood, M.Barr, N.Curtis, J.Gibelin, F.Haas, J.D.Malcolm, T.Munoz-Britton, G.Randisi, N.Soic, V.A.Ziman Neutron decay of excited states in 21Ne populated in the 12C(13C, 21Ne)4He reaction NUCLEAR REACTIONS 12C(13C, α)21Ne, E=20 MeV; measured reaction products, Eα, Iα; 21Ne deduced excitation energy spectrum, J, π, strengths, neutron decay mode. Comparison with compilations.
doi: 10.1088/0954-3899/37/12/125102
Back to query form |