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NSR database version of March 21, 2024.

Search: Author = M.Freer

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2023LO09      Phys.Lett. B 845, 138149 (2023)

J.Lois-Fuentes, B.Fernandez-Dominguez, X.Pereira-Lopez, F.Delaunay, W.N.Catford, A.Matta, N.A.Orr, T.Duguet, T.Otsuka, V.Soma, O.Sorlin, T.Suzuki, N.L.Achouri, M.Assie, S.Bailey, B.Bastin, Y.Blumenfeld, R.Borcea, M.Caamano, L.Caceres, E.Clement, A.Corsi, N.Curtis, Q.Deshayes, F.Farget, M.Fisichella, G.de France, S.Franchoo, M.Freer, J.Gibelin, A.Gillibert, G.F.Grinyer, F.Hammache, O.Kamalou, A.Knapton, Tz.Kokalova, V.Lapoux, B.Le Crom, S.Leblond, F.M.Marques, P.Morfouace, J.Pancin, L.Perrot, J.Piot, E.Pollacco, D.Ramos, D.Regueira-Castro, C.Rodriguez-Tajes, T.Roger, F.Rotaru, M.Senoville, N.de Sereville, R.Smith, M.Stanoiu, I.Stefan, C.Stodel, D.Suzuki, J.C.Thomas, N.Timofeyuk, M.Vandebrouck, J.Walshe, C.Wheldon

Cross-shell states in 15C: A test for p-sd interactions

NUCLEAR REACTIONS 2H(16C, t), E=17.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ(θ), level energies, J, π, experimental level scheme, single-particle strength, normalised spectroscopic factors. Comparison with the ab initio self-consistent Green's function method employing the NNLOsat interaction. TIARA Silicon array, three MUST2 telescopes, GANIL.

doi: 10.1016/j.physletb.2023.138149
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2022BA24      Europhys.Lett. 138, 44002 (2022)

A.K.Basak, A.C.Merchant, M.Freer, M.S.Islam, R.A.Ramon, M.Mizanur Rahman, A.S.B.Tariq, M.A.Uddin, A.Soylu

16O + 16O cluster states and their fusion to 32S: A non-monotonic potential description

NUCLEAR REACTIONS 16O(16O, X)32S, E=25-1120 MeV; analyzed available data; calculated σ, rotational constants, potential families, quasi-molecular states, bands, optical and nuclear models potentials.

doi: 10.1209/0295-5075/ac6c48
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2022FR08      J.Phys.(London) G49, 055105 (2022)

M.Freer, T.Marsh, J.Souter

Symmetries of the oblate deformed harmonic oscillator

NUCLEAR STRUCTURE 8Be, 12C, 16O, 28Si; analyzed available data; deduced prolate shell closures at deformations using the deformed harmonic oscillator (HO).

doi: 10.1088/1361-6471/ac5a76
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2022LI08      Phys.Rev. C 105, 024308 (2022)

K.C.W.Li, P.Adsley, R.Neveling, P.Papka, F.D.Smit, E.Nikolskii, J.W.Brummer, L.M.Donaldson, M.Freer, M.N.Harakeh, F.Nemulodi, L.Pellegri, V.Pesudo, M.Wiedeking, E.Z.Buthelezi, V.Chudoba, S.V.Fortsch, P.Jones, M.Kamil, J.P.Mira, G.G.O'Neill, E.Sideras-Haddad, B.Singh, S.Siem, G.F.Steyn, J.A.Swartz, I.T.Usman, J.J.van Zyl

Multiprobe study of excited states in 12C: Disentangling the sources of monopole strength between the energy of the Hoyle state and ex = 13 MeV

NUCLEAR REACTIONS 12C(α, α'), E=118, 160, 196, 200; 14C(p, t), E=67.5, 100 MeV; measured reaction products, Eα, Iα, (particle)α-coin; deduced excitation energy spectra. 12C; deduced levels, J, π, resonances, resonance widths, monopole strength distribution. Discussed the nature of monopole strength excess at around 9 MeV as possible breathing-mode excitation of the Hoyle state. CAKE-array of double-sided silicon strip detectors coupled with K600 magnetic spectrometer at iThemba LABS.

doi: 10.1103/PhysRevC.105.024308
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2022LI13      Phys.Lett. B 827, 136928 (2022)

K.C.W.Li, F.D.Smit, P.Adsley, R.Neveling, P.Papka, E.Nikolskii, J.W.Brummer, L.M.Donaldson, M.Freer, M.N.Harakeh, F.Nemulodi, L.Pellegri, V.Pesudo, M.Wiedeking, E.Z.Buthelezi, V.Chudoba, S.V.Fortsch, P.Jones, M.Kamil, J.P.Mira, G.G.O'Neill, E.Sideras-Haddad, B.Singh, S.Siem, G.F.Steyn, J.A.Swartz, I.T.Usman, J.J.van Zyl

Investigating the predicted breathing-mode excitation of the Hoyle state

NUCLEAR REACTIONS 12C(α, α'), E=200 MeV; 14C(p, t)12C, E not given; measured reaction products. 12C; deduced experimentally observed inclusive yields, monopole resonance as the breathing-mode excitation of the Hoyle state. The K600 spectrometer at the iThemba Laboratory for Accelerator-Based Sciences (iThemba LABS) in South Africa.

doi: 10.1016/j.physletb.2022.136928
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2021BA19      Eur.Phys.J. A 57, 108 (2021)

S.Bailey, T.Kokalova, M.Freer, C.Wheldon, R.Smith, J.Walshe, N.Soic, L.Prepolec, V.Tokic, F.M.Marques, L.Achouri, F.Delaunay, M.Parlog, Q.Deshayes, B.Fernandez-Dominguez, B.Jacquot

The identification of α-clustered doorway states in 44, 48, 52Ti using machine learning

NUCLEAR REACTIONS 4He(40Ca, α), (44Ca, α), (48Ca, α), E not given; analyzed available σ(θ) data; deduced Random Forest Classifier (RFC) toclassify spectra as either clustered or not clustered.

doi: 10.1140/epja/s10050-021-00357-3
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2021FR03      Eur.Phys.J. A 57, 102 (2021)

M.Freer, R.Canavan, T.Marsh, J.Souter

Probing nuclear cluster symmetries through the harmonic oscillator

NUCLEAR STRUCTURE 12C, 16O, 20Ne, 48Cr, 56Ni, 64Ge, 24Mg, 40Ca, 60Zn; calculated Deformed Harmonic Oscillator (DHO) densities, wavefunctions, Hoyle states.

doi: 10.1140/epja/s10050-021-00402-1
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2020CA21      J.Phys.(London) G47, 095102 (2020)

R.Canavan, M.Freer

Demonstration of the universality of molecular structures in prolate deformed nuclei

NUCLEAR STRUCTURE 9Be, 12,13C, 16,17O, 20,21Ne, 24,25Mg, 32,33S, 36,37Ar, 48,49Cr, 56,57Ni, 64,65Ge, 72,73Kr, 80,81Zr, 96,97Cd; calculated the deformed harmonic oscillator densities, possible molecular orbitals for the valence neutron.

doi: 10.1088/1361-6471/ab96b3
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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
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2020PE15      Phys.Lett. B 811, 135939 (2020)

X.Pereira-Lopez, B.Fernandez-Dominguez, F.Delaunay, N.L.Achouri, N.A.Orr, W.N.Catford, M.Assie, S.Bailey, B.Bastin, Y.Blumenfeld, R.Borcea, M.Caamano, L.Caceres, E.Clement, A.Corsi, N.Curtis, Q.Deshayes, F.Farget, M.Fisichella, G.de France, S.Franchoo, M.Freer, J.Gibelin, A.Gillibert, G.F.Grinyer, F.Hammache, O.Kamalou, A.Knapton, T.Kokalova, V.Lapoux, J.A.Lay, B.Le Crom, S.Leblond, J.Lois-Fuentes, F.M.Marques, A.Matta, P.Morfouace, A.M.Moro, T.Otsuka, J.Pancin, L.Perrot, J.Piot, E.Pollacco, D.Ramos, C.Rodriguez-Tajes, T.Roger, F.Rotaru, M.Senoville, N.de Sereville, R.Smith, O.Sorlin, M.Stanoiu, I.Stefan, C.Stodel, D.Suzuki, T.Suzuki, J.C.Thomas, N.Timofeyuk, M.Vandebrouck, J.Walshe, C.Wheldon

Low-lying single-particle structure of 17C and the N=14 sub-shell closure

NUCLEAR REACTIONS 2H(16C, p)17C, E=17.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced σ(θ), γ-ray energies, J, π, level scheme, spectroscopic factors. Comparison with shell model and particle-core model calculations.

doi: 10.1016/j.physletb.2020.135939
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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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2019BA45      Phys.Rev. C 100, 051302 (2019)

S.Bailey, T.Kokalova, M.Freer, C.Wheldon, R.Smith, J.Walshe, N.Curtis, N.Soic, L.Prepolec, V.Tokic, F.M.Marques, L.Achouri, F.Delaunay, Q.Deshayes, M.Parlog, B.Fernandez-Dominguez, B.Jacquot, A.Soylu

Extracting the spectral signature of α clustering in 44, 48, 52Ti using a continuous wavelet transform

NUCLEAR REACTIONS 4He(40Ca, α)44Ti*, E=180 MeV; 4He(44Ca, α)48Ti*, E=207 MeV; 4He(48Ca, α)52Ti*, E=234 MeV; measured scattered α particles, Eα, Iα, differential σ using double-sided silicon strip detectors at the GANIL radioactive beam facility; deduced continuous wavelet transform (CWT) of the measured spectra, and compared with simulated spectra using the simplified R matrix for spinless particles. 44Ti; deduced high-lying α-clustered levels J, π and compared with previous measurements. Present technique combined thick target inverse kinematics (TTIK) approach and the resonant scattering measurements with the continuous wavelet transform (CWT).

doi: 10.1103/PhysRevC.100.051302
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2019BI05      Phys.Rev. C 100, 034320 (2019)

J.Bishop, Tz.Kokalova, M.Freer, L.Acosta, M.Assie, S.Bailey, G.Cardella, N.Curtis, E.De Filippo, D.Dell'Aquila, S.De Luca, L.Francalanza, B.Gnoffo, G.Lanzalone, I.Lombardo, N.S.Martorana, S.Norella, A.Pagano, E.V.Pagano, M.Papa, S.Pirrone, G.Politi, F.Rizzo, P.Russotto, L.Quattrocchi, R.Smith, I.Stefan, A.Trifiro, M.Trimarchi, G.Verde, M.Vigilante, C.Wheldon

Experimental investigation of α condensation in light nuclei

NUCLEAR REACTIONS 12C(16O, 28Si)4He/6Li/7Li/7Be/9Be/10B/11B/11C/12C/13C/11N/12C/15O/15N/16O/F/Ne/20Ne/24Mg/28Si, E=160, 280, 400 MeV from the K800 cyclotron at the LNS-Catania accelerator facility; measured reaction product yields, σ, Eα, Iα using the Charged Heavy Ion Mass and Energy Resolving Array (CHIMERA) and Femtoscope Array for Correlation and Spectroscopy (FARCOS); deduced raw α-particle multiplicity, particle-identification plots (PIDs), interaction time plot, distribution of α-particle energies, excitation functions, Q values for different reaction channels, branching ratios for the 7-α breakup modes. Experiments aimed at search for α-gas states in 12C, 16O, 20Ne, 24Mg, 28Si. Results described by a hybrid of sequential decays and multiparticle breakup mechanisms, as no signatures for α condensation observed. Comparison of measured yields to the extended Hauser-Feshbach (EHF), and comparison of 7-α particle states to Fermi breakup model predictions.

doi: 10.1103/PhysRevC.100.034320
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2019LA03      J.Phys.(London) G46, 03LT02 (2019)

B.Laurent, F.M.Marques, C.Angulo, N.I.Ashwood, M.J.G.Borge, V.Bouchat, W.N.Catford, N.M.Clarke, N.Curtis, M.Freer, F.Hanappe, V.Kinnard, M.Labiche, T.Materna, P.McEwan, T.Nilsson, A.Ninane, G.Normand, N.A.Orr, S.D.Pain, E.Prokhorova, L.Stuttge, C.Timis

Chronology of the three-body dissociation of 8He

NUCLEAR REACTIONS C, Pb(8He, 2n), E=15 MeV/nucleon; measured reaction products, En, In; deduced decay energy, density distributions, Dalitz plots, two-neutron correlation function.

doi: 10.1088/1361-6471/ab02c3
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2018FE05      Phys.Lett. B 779, 124 (2018)

B.Fernandez-Dominguez, B.Pietras, W.N.Catford, N.A.Orr, M.Petri, M.Chartier, S.Paschalis, N.Patterson, J.S.Thomas, M.Caamano, T.Otsuka, A.Poves, N.Tsunoda, N.L.Achouri, J.-C.Angelique, N.I.Ashwood, A.Banu, B.Bastin, R.Borcea, J.Brown, F.Delaunay, S.Franchoo, M.Freer, L.Gaudefroy, S.Heil, M.Labiche, B.Laurent, R.C.Lemmon, A.O.Macchiavelli, F.Negoita, E.S.Paul, C.Rodriguez-Tajes, P.Roussel-Chomaz, M.Staniou, M.J.Taylor, L.Trache, G.L.Wilson

Re-examining the transition into the N = 20 island of inversion: Structure of 30Mg

NUCLEAR REACTIONS C(31Mg, n)30Mg, E=55.1 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies and intensities, J, π, single-particle σ, spectroscopic factors. Comparison with shell model calculations.

doi: 10.1016/j.physletb.2018.02.002
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2017FR09      Phys.Lett. B 775, 58 (2017)

M.Freer, N.I.Ashwood, N.L.Achouri, W.N.Catford, N.Curtis, F.Delaunay, H.Al Falou, F.M.Marques, T.Munoz-Britton, N.A.Orr, R.Raabe, N.Soic, J.S.Thomas, C.Wheldon, V.A.Ziman

Elastic scattering of 8He + 4He and two-neutron transfer and the influence of resonances in 12Be

NUCLEAR REACTIONS 4He(8He, 8He), E=20, 24 MeV; measured reaction products, Eα, Iα. 8He, 12Be; deduced σ(θ), halo. Comparison with generalized two-centre cluster model (GTCM) calculations.

doi: 10.1016/j.physletb.2017.10.063
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2017LI08      Phys.Rev. C 95, 031302 (2017)

K.C.W.Li, R.Neveling, P.Adsley, P.Papka, F.D.Smit, J.W.Brummer, C.Aa.Diget, M.Freer, M.N.Harakeh, Tz.Kokalova, F.Nemulodi, L.Pellegri, B.Rebeiro, J.A.Swartz, S.Triambak, J.J.van Zyl, C.Wheldon

Characterization of the proposed 4-α cluster state candidate in 16O

NUCLEAR REACTIONS 16O(α, α'), E=200 MeV; measured Eα, Iα, E(p), I(p), (particle)(particle)-coin, angular correlations of charged-particle decays from 16O via α and proton decays using K600 magnetic spectrometer at iThemba LABS. 16O; deduced levels, resonances, L-transfers, J, π, total widths and branching ratios for particle decays of resonances extracted from R-matrix fits, a resonance at 15.090 MeV, 0+ suggested as a candidate for the 4α cluster state, consistent with several theoretical cluster calculations.

doi: 10.1103/PhysRevC.95.031302
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2017SM03      Phys.Rev.Lett. 119, 132502 (2017)

R.Smith, Tz.Kokalova, C.Wheldon, J.E.Bishop, M.Freer, N.Curtis, D.J.Parker

New Measurement of the Direct 3α Decay from the 12C Hoyle State

NUCLEAR REACTIONS 12C(α, 3α)4He, E=40 MeV; measured reaction products, Eα, Iα; deduced Dalitz plots, upper limit for the rare direct 3α decay branch. Comparison with theoretical calculations.

doi: 10.1103/physrevlett.119.132502
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2017TO06      Acta Phys.Pol. B48, 319 (2017)

V.Tokic, N.Soic, S.Blagus, S.Fazinic, D.Jelavic-Malenica, T.Mijatovic, D.Miljanic, L.Prepolec, N.Skukan, S.Szilner, M.Uroic, M.Milin, A.Di Pietro, P.Figuera, J.P.Fernandez-Garcia, M.Fisichella, M.Lattuada, V.Scuderi, E.Strano, D.Torresi, S.Bailey, N.Curtis, M.Freer, R.Smith, J.Walshe, V.Ziman, L.Acosta, I.Martel, G.Marquinez-Duran, A.M.Sanchez-Benitez, E.Fioretto

Structure of 24Mg Excited States and Their Influence on Nucleosynthesis

NUCLEAR REACTIONS 12C(16O, α)24Mg, E=94 MeV; measured decay channels of 24Mg (emission of α, proton, breakup to 12C+12C and to 8Be+16O). 24Mg; deduced excitation energies of resonances. 4He(20Ne, α)20Ne, E=44, 52, 60 MeV; measured reaction products. 24Mg; deduced σ(θ), resonances; calculated σ(θ) using R-matrix fit to the data at 44 MeV. Further R-matrix calculations in progress.

doi: 10.5506/APhysPolB.48.319
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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
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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
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2016WA29      Phys.Rev. C 94, 054304 (2016)

J.Walshe, M.Freer, C.Wheldon, A.Soylu, N.L.Achouri, N.I.Ashwood, W.N.Catford, I.C.Celik, N.Curtis, F.Delaunay, B.Fernandez-Dominguez, L.Grassi, Tz.Kokalova, F.M.Marques, N.A.Orr, L.Prepolec, V.Scuderi, N.Soic, V.Tokic

Experimental study of high-lying states in 28Mg using the resonant elastic scattering of α particles

NUCLEAR REACTIONS 4He(24Ne, α), E=3.8 MeV/nucleon, [24Ne secondary beam from C(26Mg, X), E=E=82 MeV/nucleon at GANIL facility]; measured Eα, Iα, σ(Eα, θ) using thick target in inverse kinematics (TTIK) technique. 28Mg; deduced levels, resonances, J, π, α and total widths, ratio of reduced width to the Wigner limit. R-Matrix analysis using AZURE2 code. Comparisons with theoretical calculations of widths using the code GAMOW.

doi: 10.1103/PhysRevC.94.054304
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2015SW01      Phys.Rev. C 91, 034317 (2015)

J.A.Swartz, B.A.Brown, P.Papka, F.D.Smit, R.Neveling, E.Z.Buthelezi, S.V.Fortsch, M.Freer, Tz.Kokalova, J.P.Mira, F.Nemulodi, J.N.Orce, W.A.Richter, G.F.Steyn

Spectroscopy of narrow, high-lying, low-spin states in 20Ne

NUCLEAR REACTIONS 22Ne(p, t), E=60 MeV; measured triton spectra, σ(θ) using QDD magnetic spectrometer at iThemba Labs. 20Ne; deduced levels, J, π, possible 5α cluster state, isospin T=2 states in 20Ne, 20O and 20F. Comparison of angular distributions with calculations using FRESCO code, and structure data with shell-model calculations using OXBASH code.

doi: 10.1103/PhysRevC.91.034317
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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
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2014BA35      Phys.Rev. C 90, 024302 (2014)

S.Bailey, M.Freer, Tz.Kokalova, S.Cruz, H.Floyd, D.J.Parker

Energy levels of 18F from the 14N+α resonant reaction

NUCLEAR REACTIONS 4He(14N, α), (14N, d), E≈46, 62 MeV; measured particle spectra, σ(E) as function of excitation energy at the University of Birmingham MC40 Cyclotron facility. Thick-target inverse kinematics (TTIK) and R-matrix analyses. 18F; deduced levels, resonances, J, π, widths, partial widths, candidates for α-cluster states, rotational bands. 14N(α, α), (α, p); 16O(d, d), (d, α); analyzed previous σ data by R-matrix. Comparison with previous experimental results, evaluated data, and theoretical calculations.

doi: 10.1103/PhysRevC.90.024302
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2235. Data from this article have been entered in the XUNDL database. For more information, click here.


2014FR09      Prog.Part.Nucl.Phys. 78, 1 (2014)

M.Freer, H.O.U.Fynbo

The Hoyle state in 12C

NUCLEAR STRUCTURE 12C; analyzed available data nuclear structure and reaction data; deduced nuclear astrophysics applications.

doi: 10.1016/j.ppnp.2014.06.001
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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
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2014FR15      Pramana 83, 643 (2014)

M.Freer

The structure of 12C

doi: 10.1007/s12043-014-0859-6
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2014MA37      Phys.Rev.Lett. 113, 012502 (2014)

D.J.Marin-Lambarri, R.Bijker, M.Freer, M.Gai, Tz.Kokalova, D.J.Parker, C.Wheldon

Evidence for Triangular D3h Symmetry in 12C

NUCLEAR REACTIONS 12C(α, 3α), E=40 MeV; measured reaction products, Eα, Iα; deduced yields, level scheme, J, π, high-spin states. Comparison with available data.

doi: 10.1103/PhysRevLett.113.012502
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2014RA07      Phys.Rev. C 89, 034320 (2014)

G.Randisi, A.Leprince, H.Al Falou, N.A.Orr, F.M.Marques, N.L.Achouri, J.-C.Angelique, N.Ashwood, B.Bastin, T.Bloxham, B.A.Brown, W.N.Catford, N.Curtis, F.Delaunay, M.Freer, E.de Goes Brennand, P.Haigh, F.Hanappe, C.Harlin, B.Laurent, J.-L.Lecouey, A.Ninane, N.Patterson, D.Price, L.Stuttge, J.S.Thomas

Structure of 13Be probed via secondary-beam reactions

NUCLEAR REACTIONS 12C(14B, 13Be), (15B, 13Be), [14,15B secondary beams from 9Be(18O, X), E=55 MeV/nucleon primary reaction], E=35 MeV/nucleon; measured reaction products, (12Be)n-, (fragment)γ-coin, Iγ using LISE spectrometer, Si-Si-CsI(TI) telescope, DEMON array at GANIL facility; deduced neutron energy spectrum; reconstructed 12Be+n, 6He+n, 12Be+n+n decay spectra from breakup of 14B and 15B. C(14B, X)9Be/10Be/11Be/12Be; measured (particle)n-coin; deduced yields. 13Be; deduced levels, J, π, resonances, width, relative population strengths. Comparison with shell-model calculations, and with previous experimental results.

doi: 10.1103/PhysRevC.89.034320
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2014WH02      Phys.Rev. C 90, 014319 (2014)

C.Wheldon, Tz.Kokalova, M.Freer, A.Glenn, D.J.Parker, T.Roberts, I.Walmsley

States at high excitation in 12C from the 12C(3He, 3He)3α reaction

NUCLEAR REACTIONS 12C(3He, 3He')3α, E=46 MeV; measured 3He spectra, 2α spectra from 8Be+α channel, yields of 6Li, 3,4He, 1,2H. 12C; deduced levels through reconstructed 8Beg.s.+α decay, isospin, widths, partial α widths, Comparison with previous experimental results. Discussed systematics of rotational states in 12C.

doi: 10.1103/PhysRevC.90.014319
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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
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2013JE04      Phys.Rev. C 87, 064301 (2013)

D.G.Jenkins, M.Bouhelal, S.Courtin, M.Freer, B.R.Fulton, F.Haas, R.V.F.Janssens, T.L.Khoo, C.J.Lister, E.F.Moore, W.A.Richter, B.Truett, A.H.Wuosmaa

γ-ray spectroscopy of the A=23 T=1/2 nuclei 23Na and 23Mg: High-spin states, mirror symmetry, and applications to nuclear astrophysical reaction rates

NUCLEAR REACTIONS 12C(12C, p), E=16 MeV; 12C(12C, n), E=22 MeV; measured Eγ, Iγ, γγ-coin, γγ(θ)(DCO), level half-lives by DSAM using Gammasphere array at ATLAS-ANL facility. 23Na, 23Mg; deduced high-spin levels, J, π, bands, multipolarity, mirror energy differences, proton unbound states. Comparison to Shell-model calculations using PSPDF interaction. 22Ne(p, γ)23Mg; 22Ne(p, γ)23Na; discussed proton unbound states, Gamow window and impact on astrophysical applications.

doi: 10.1103/PhysRevC.87.064301
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2013KO14      Phys.Rev. C 87, 057307 (2013)

Tz.Kokalova, M.Freer, Z.Buthelezi, J.Carter, R.W.Fearick, S.V.Fortsch, H.Fujita, R.Neveling, P.Papka, F.D.Smit, J.A.Swartz, I.Usman

Precision measurement of the 9.641 MeV, 3- state in 12C

NUCLEAR REACTIONS 12C(p, p'), E=66 MeV; measured E(p), I(p), σ(θ) using K600 magnetic spectrometer at iThemba LABS. 12C; deduced width of 9.641 MeV, 3- state. R-matrix analysis. Wigner limit and α-particle content.

doi: 10.1103/PhysRevC.87.057307
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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
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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
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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
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2012FR05      Phys.Rev. C 86, 034320 (2012)

M.Freer, M.Itoh, T.Kawabata, H.Fujita, H.Akimune, Z.Buthelezi, J.Carter, R.W.Fearick, S.V.Fortsch, M.Fujiwara, U.Garg, N.Hashimoto, K.Kawase, S.Kishi, T.Murakami, K.Nakanishi, Y.Nakatsugawa, B.K.Nayak, R.Neveling, S.Okumura, S.M.Perez, P.Papka, H.Sakaguchi, Y.Sasamoto, F.D.Smit, J.A.Swartz, H.Takeda, S.Terashima, M.Uchida, I.Usman, Y.Yasuda, M.Yosoi, J.Zenihiro

Consistent analysis of the 2+ excitation of the 12C Hoyle state populated in proton and α-particle inelastic scattering

NUCLEAR REACTIONS 12C(p, p'), E=66 MeV; 12C(α, α'), E=386 MeV; measured 12C excitation spectra. 12C; deduced levels, 2+ excitation of the 0+ Hoyle state. R-matrix analysis. Discussed potential geometric arrangements of the cluster structures.

doi: 10.1103/PhysRevC.86.034320
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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
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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
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2012SM06      Phys.Rev. C 86, 037301 (2012)

F.D.Smit, F.Nemulodi, Z.Buthelezi, J.Carter, R.W.Fearick, S.V.Fortsch, M.Freer, H.Fujita, M.Jingo, C.O.Kureba, J.Mabiala, J.Mira, R.Neveling, P.Papka, G.F.Steyn, J.A.Swartz, I.T.Usman, J.J.van Zyl

No evidence of an 11.16 MeV 2+ state in 12C

NUCLEAR REACTIONS 11B(3He, d)12C, E=44 MeV; measured Ed, Id, energy loss, time of flight using magnetic spectrometer, σ(θ). R-matrix analysis; deduced level; no evidence for a previously reported 2+ state at 11.16 MeV.

doi: 10.1103/PhysRevC.86.037301
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2012SO20      Phys.Rev. C 86, 057601 (2012)

A.Soylu, M.Freer, N.I.Ashwood, N.Curtis, T.Munoz-Britton, S.Spencer, C.Wheldon, V.Ziman, S.Brown, J.S.Thomas, G.Wilson, G.Goldring

Excitation function measurements of 12C(4He, 8Be)8Be, 12C(4He, 12C[7.65, 0+])4He, and 12C(4He, 12C[9.64, 3-]))4He reactions

NUCLEAR REACTIONS 12C(α, 8Be)8Be, 12C(α, 12C'), E=14-21 MeV; measured particle spectra, excitation functions. 8Be, 12C, 16O; deduced levels, α-particle like cluster structures.

doi: 10.1103/PhysRevC.86.057601
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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
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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
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2011AC02      Phys.Rev. C 84, 044604 (2011)

L.Acosta, A.M.Sanchez-Benitez, M.E.Gomez, I.Martel, F.Perez-Bernal, F.Pizarro, J.Rodriguez-Quintero, K.Rusek, M.A.G.Alvarez, M.V.Andres, J.M.Espino, J.P.Fernandez-Garcia, J.Gomez-Camacho, A.M.Moro, C.Angulo, J.Cabrera, E.Casarejos, P.Demaret, M.J.G.Borge, D.Escrig, O.Tengblad, S.Cherubini, P.Figuera, M.Gulino, M.Freer, C.Metelko, V.Ziman, R.Raabe, I.Mukha, D.Smirnov, O.R.Kakuee, J.Rahighi

Elastic scattering and α-particle production in 6He + 208Pb collisions at 22 MeV

NUCLEAR REACTIONS 208Pb(6He, 6He), [secondary 6He beam from 7Li(p, 2p), E=30 MeV primary reaction], E=22 MeV; measured particle spectra, yields, σ(θ), 4He production rates and 4He energy distribution spectrum. DWBA analysis. Discussed neutron transfer mechanism for 4He production.

doi: 10.1103/PhysRevC.84.044604
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2011BA27      Phys.Rev. C 84, 015803 (2011)

A.Banu, L.Trache, F.Carstoiu, N.L.Achouri, A.Bonaccorso, W.N.Catford, M.Chartier, M.Dimmock, B.Fernandez-Dominguez, M.Freer, L.Gaudefroy, M.Horoi, M.Labiche, B.Laurent, R.C.Lemmon, F.Negoita, N.A.Orr, S.Paschalis, N.Patterson, E.S.Paul, M.Petri, B.Pietras, B.T.Roeder, F.Rotaru, P.Roussel-Chomaz, E.Simmons, J.S.Thomas, R.E.Tribble

Structure of 23Al from the one-proton breakup reaction and astrophysical implications

NUCLEAR REACTIONS 12C(23Al, 22Mg), [23Al secondary beam from C(32S, X)E=95 MeV/nucleon primary reaction], E=57 MeV/nucleon; measured fragment spectra, inclusive and exclusive longitudinal momentum distributions, and widths, Eγ, (fragment)γ-coin. 22Mg; deduced levels, J, π, σ, spectroscopic factors, asymptotic normalization coefficients. 23Al; deduced g.s. Jπ, configuration mixing. Comparison with Glauber and large-scale shell model calculations. 22Mg(p, γ)23Al, E<1 MeV; deduced stellar reaction rates; discussed astrophysical significance of 22Na nucleosynthesis in ONe novae.

doi: 10.1103/PhysRevC.84.015803
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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
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2011FR12      Phys.Rev. C 84, 034317 (2011)

M.Freer, N.I.Ashwood, N.Curtis, A.Di Pietro, P.Figuera, M.Fisichella, L.Grassi, D.Jelavic Malenica, Tz.Kokalova, M.Koncul, T.Mijatovic, M.Milin, L.Prepolec, V.Scuderi, N.Skukan, N.Soic, S.Szilner, V.Tokic, D.Torresi, C.Wheldon

Analysis of states in 13C populated in 9Be + 4He resonant scattering

NUCLEAR REACTIONS 4He(9Be, α), E=12, 17, 20, 21.4 MeV; measured α spectra, excitation function, σ(E). 13C; deduced levels, J, π, resonances, widths, partial α and neutron widths, R-matrix analysis. Comparison with previous data.

doi: 10.1103/PhysRevC.84.034317
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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
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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
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2011ZI01      Phys.Rev. C 84, 027304 (2011)

W.R.Zimmerman, N.E.Destefano, M.Freer, M.Gai, F.D.Smit

Further evidence for the broad 2+2 state at 9.6 MeV in 12C

NUCLEAR REACTIONS 12C(p, p'), E=25 MeV; measured Ep, Ip, σ(θ). 12C; deduced levels, resonances, J, π. Comparison with previous experiments.

doi: 10.1103/PhysRevC.84.027304
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2010CA10      Phys.Rev.Lett. 104, 192501 (2010)

W.N.Catford, C.N.Timis, R.C.Lemmon, M.Labiche, N.A.Orr, B.Fernandez-Dominguez, R.Chapman, M.Freer, M.Chartier, H.Savajols, M.Rejmund, N.L.Achouri, N.Amzal, N.I.Ashwood, T.D.Baldwin, M.Burns, L.Caballero, J.M.Casadjian, N.Curtis, G.de France, W.Gelletly, X.Liang, S.D.Pain, V.P.E.Pucknell, B.Rubio, O.Sorlin, K.Spohr, Ch.Theisen, D.D.Warner

Migration of Nuclear Shell Gaps Studied in the d(24Ne, pγ)25Ne Reaction

NUCLEAR REACTIONS 2H(24Ne, pγ)25Ne, E=10.6 MeV/nucleon; measured neutron transfer reaction products, Eγ, Iγ, p-γ-coin.; deduced σ(θ), level energies, J, π, orbital momentum, level inversion, N=16 shell gap. USD shell model.

doi: 10.1103/PhysRevLett.104.192501
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2010FR03      Nucl.Phys. A834, 621c (2010)

M.Freer, H.Fujita, Z.Buthelezi, J.Carter, R.W.Fearick, S.V.Fortsch, R.Neveling, S.M.Perez, P.Papka, F.D.Smit, J.A.Swartz, I.Usman, P.J.Haigh, N.I.Ashwood, T.Bloxham, N.Curtis, P.McEwan, H.G.Bohlen, T.Dorsch, Tz.Kokalova, Ch.Schulz, C.Wheldon

Cluster Structure of 12C and 11Be

NUCLEAR REACTIONS 12C(p, p'), E=66 MeV; measured Ep, Ip(θ=10null, 16null, 28null). 9Be(16O, 14O), E=234 MeV; measured E(particle), I(particle). 11Be; deduced levels, J, π. 11Be, 12C calculated levels, J, π, rotational and vibrational bands assuming 2α+3n for 11Be and 3α for 12C.

doi: 10.1016/j.nuclphysa.2010.01.107
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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
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2010HA02      J.Phys.(London) G37, 035103 (2010)

P.J.Haigh, M.Freer, N.I.Ashwood, T.Bloxham, N.Curtis, H.G.Bohlen, T.Dorsch, Tz.Kokalova, C.Wheldon, W.N.Catford, N.P.Patterson, J.S.Thomas

Alpha decay widths of excited states of 16O

NUCLEAR REACTIONS 12C(13C, 9Be), E=141 MeV; measured reaction fragments; deduced high-spin states in 16O, decay widths, precise values for the α-decay branching ratios from the high-spin states.

doi: 10.1088/0954-3899/37/3/035103
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2010MU05      J.Phys.(London) G37, 105104 (2010)

T.Munoz-Britton, M.Freer, N.I.Ashwood, T.A.D.Brown, W.N.Catford, N.Curtis, S.P.Fox, B.R.Fulton, C.W.Harlin, A.M.Laird, P.Mumby-Croft, A.St.J.Murphy, P.Papka, D.L.Price, K.Vaughan, D.L.Watson, D.C.Weisser

Search for the 2+ excitation of the Hoyle state in 12C using the 12C(12C, 3α)12C reaction

NUCLEAR REACTIONS 12C(12C, 3α)12C, E=101.5 MeV; measured reaction products, Eα, Iα; deduced excitation energy spectrum, J, π, no evidence of 2+ state.

doi: 10.1088/0954-3899/37/10/105104
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2009AS01      J.Phys.(London) G36, 055105 (2009)

N.I.Ashwood, M.Freer, N.L.Achouri, T.R.Bloxham, W.N.Catford, N.Curtis, P.J.Haigh, C.W.Harlin, N.P.Patterson, D.L.Price, N.Soic, J.S.Thomas

Spectroscopy of 16O using α + 12C resonant scattering in inverse kinematics

NUCLEAR REACTIONS 4He(12C, α), E=46, 52, 56, 63 MeV; measured Eα, Iα, resonant scattering cross sections. 16O; deduced resonance parameters.

doi: 10.1088/0954-3899/36/5/055105
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2009CU01      J.Phys.(London) G36, 015108 (2009)

N.Curtis, N.I.Ashwood, M.Freer, T.Munoz-Britton, C.Wheldon, V.A.Ziman, S.Brown, W.N.Catford, N.P.Patterson, J.S.Thomas, D.C.Weisser

Search for the α + 6He decay of 10Be via the 16O(18O, 10Be*)24Mg reaction

NUCLEAR REACTIONS 16O(18O, 10Be), (18O, 19F), E=80, 100 MeV; measured breakup fragment energies, yields, cross sections.

RADIOACTIVITY 10Be, 19F(α); measured α-decay from excited states.

doi: 10.1088/0954-3899/36/1/015108
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2009FR07      Phys.Rev. C 80, 041303 (2009)

M.Freer, H.Fujita, Z.Buthelezi, J.Carter, R.W.Fearick, S.V.Fortsch, R.Neveling, S.M.Perez, P.Papka, F.D.Smit, J.A.Swartz, I.Usman

2+ excitation of the 12C Hoyle state

NUCLEAR REACTIONS 12C(p, p'), E=66 MeV; 13C(p, p'), E=200 MeV; measured Ep and σ(θ). 12C; deduced levels, J, π, 2+ excitation of the Hoyle state in 12C. Coupled-channel (CCRC) analysis. Implications for the 8Be+4He reaction rate in stellar environments discussed.

doi: 10.1103/PhysRevC.80.041303
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2009HA01      Phys.Rev. C 79, 014302 (2009)

P.J.Haigh, M.Freer, N.I.Ashwood, T.Bloxham, N.Curtis, P.McEwan, H.G.Bohlen, T.Dorsch, Tz.Kokalova, Ch.Schulz, C.Wheldon

Neutron decay widths of excited states of 11Be

NUCLEAR REACTIONS 9Be(16O, 14O), E=234 MeV; measured 14O spectra, 10Be-14O coin, energies and angles of 10Be fragments, branching ratios, widths, neutron energies, neutron decay of excited states of 11Be to 10Be. 10,11Be; deduced levels, J, π. R-matrix formalism.

doi: 10.1103/PhysRevC.79.014302
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2009LE02      Phys.Lett. B 672, 6 (2009)

J.-L.Lecouey, N.A.Orr, F.M.Marques, N.L.Achouri, J.-C.Angelique, B.A.Brown, F.Carstoiu, W.N.Catford, N.M.Clarke, M.Freer, B.R.Fulton, S.Grevy, F.Hanappe, K.L.Jones, M.Labiche, R.C.Lemmon, A.Ninane, E.Sauvan, K.M.Spohr, L.Stuttge

Single-proton removal reaction study of 16B

NUCLEAR REACTIONS 12C(17C, np15B), E=35 MeV/nucleon; measured neutron spectra, (fragment)(neutron)-coin, σ(θ), related features. 16B deduced energy levels, J, π, configurations. Comparison with shell model calculations and other data. Secondary radioactive beam.

doi: 10.1016/j.physletb.2008.12.053
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2009WH01      J.Phys.(London) G36, 095102 (2009)

C.Wheldon, N.I.Ashwood, N.Curtis, M.Freer, T.Munoz-Britton, V.A.Ziman, T.Faestermann, H.-F.Wirth, R.Hertenberger, R.Lutter, R.Gernhauser, R.Krucken, L.Maier

High-resolution particle spectroscopy of 186Re

NUCLEAR REACTIONS 187Re(p, d), E=21 MeV; measured Ed, Id; deduced energy levels, J, π. Comparison with calculations, Q3D magnetic spectrograph.

doi: 10.1088/0954-3899/36/9/095102
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2008CU01      Phys.Rev. C 77, 021301 (2008); Erratum Phys.Rev. C 82, 029907 (2010)

N.Curtis, N.L.Achouri, N.I.Ashwood, H.G.Bohlen, W.N.Catford, N.M.Clarke, M.Freer, P.J.Haigh, B.Laurent, N.A.Orr, N.P.Patterson, N.Soic, J.S.Thomas, V.Ziman

Breakup reaction study of the Brunnian nucleus 10C

NUCLEAR REACTIONS 12C(10C, p), (10C, α), E=33.3 MeV/nucleon; measured reaction products, Ep, Ip, Eα, Iα. 5Li, 6,8Be, 9B, 10C; deduced σ for 10C excited states and decay channels, decay product angular distributions, cluster structures. LISE3 spectrometer, the GANIL accelerator facility.

doi: 10.1103/PhysRevC.77.021301
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2008FR09      J.Phys.(London) G35, 125108 (2008)

M.Freer, N.I.Ashwood, N.Curtis, T.Munoz-Britton, C.Wheldon, V.A.Ziman, S.Brown, W.N.Catford, N.P.Patterson, J.S.Thomas, D.C.Weisser

Excited states of 8Be populated via the p(7Li, 4He)4He and p(7Li, 4He*)4He resonant reactions

NUCLEAR REACTIONS 1H(7Li, α), E=25.8, 58.0 MeV; measured Eα, Iα. 8Be; deduced resonance parameters.

doi: 10.1088/0954-3899/35/12/125108
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2008FR12      Int.J.Mod.Phys. E17, 2096 (2008)

M.Freer

Search for dilute nuclear states in 12C and 16O

NUCLEAR STRUCTURE 12C, 16O; analyzed experimental evidence for dilute α-particle states; deduced 3α-, 4α-cluster states.

doi: 10.1142/S021830130801115X
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2008HA27      Phys.Rev. C 78, 014319 (2008)

P.J.Haigh, N.I.Ashwood, T.Bloxham, N.Curtis, M.Freer, P.McEwan, D.Price, V.Ziman, H.G.Bohlen, Tz.Kokalova, Ch.Schulz, R.Torabi, W.von Oertzen, C.Wheldon, W.Catford, C.Harlin, R.Kalpakchieva, T.N.Massey

Measurement of α and neutron decay widths of excited states of 14C

NUCLEAR REACTIONS 12C(16O, 14O), E=234 MeV; measured charged particle spectra. 14C; deduced levels, J, π, configurations, widths of excited states. 7Li(9Be, 14C);14C(13C, 14C), (14C, 14C); 9Be(7Li, d); 13C(polarized p, π+), (n, n); comparison of levels.

RADIOACTIVITY 14C(n)(α); measured partial decay widths. 10Be, 13C; deduced levels, J, π, angular distributions, configurations. Comparison with model calculations.

doi: 10.1103/PhysRevC.78.014319
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2008SA09      Nucl.Phys. A803, 30 (2008)

A.M.Sanchez-Benitez, D.Escrig, M.A.G.Alvarez, M.V.Andres, C.Angulo, M.J.G.Borge, J.Cabrera, S.Cherubini, P.Demaret, J.M.Espino, P.Figuera, M.Freer, J.E.Garcia-Ramos, J.Gomez-Camacho, M.Gulino, O.R.Kakuee, I.Martel, C.Metelko, A.M.Moro, F.Perez-Bernal, J.Rahighi, K.Rusek, D.Smirnov, O.Tengblad, P.Van Duppen, V.Ziman

Study of the elastic scattering of 6He on 208Pb at energies around the Coulomb barrier

NUCLEAR REACTIONS 208Pb(6He, 6He), E=14, 16, 18, 22 MeV; measured σ(θ). Comparison with optical model calculations, including Coulomb dipole polarizability and dispersion relations.

doi: 10.1016/j.nuclphysa.2008.01.030
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2007BL15      Phys.Rev. C 76, 025501 (2007)

T.Bloxham, A.Boston, J.Dawson, D.Dobos, S.P.Fox, M.Freer, B.R.Fulton, C.Gossling, P.F.Harrison, M.Junker, H.Kiel, J.McGrath, B.Morgan, D.Munstermann, P.Nolan, S.Oehl, Y.Ramachers, C.Reeve, D.Stewart, R.Wadsworth, J.R.Wilson, K.Zuber

First results on double β-decay modes of Cd, Te, and Zn Isotopes

RADIOACTIVITY 70Zn, 116Cd, 128,130Te(β-β-); 64Zn, 106Cd, 120Te(β+β+); measured summed Eβ. Deduced upper limits for T1/2.

doi: 10.1103/PhysRevC.76.025501
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2007BR30      Phys.Rev. C 76, 054605 (2007)

T.A.D.Brown, P.Papka, B.R.Fulton, D.L.Watson, S.P.Fox, D.Groombridge, M.Freer, N.M.Clarke, N.I.Ashwood, N.Curtis, V.Ziman, P.McEwan, S.Ahmed, W.N.Catford, D.Mahboub, C.N.Timis, T.D.Baldwin, D.C.Weisser

Decay studies for states in 9Be up to 11 MeV: Insights into the n+8Be and α+5He cluster structure

NUCLEAR REACTIONS 9Be(6Li, 6Li), E=60 MeV; measured charged particle spectra, branching ratios, αα-correlations. 7Li, 9Be; deduced excitation energies.

doi: 10.1103/PhysRevC.76.054605
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2007ES06      Nucl.Phys. A792, 2 (2007)

D.Escrig, A.M.Sanchez-Benitez, A.M.Moro, M.A.G.Alvarez, M.V.Andres, C.Angulo, M.J.G.Borge, J.Cabrera, S.Cherubini, P.Demaret, J.M.Espino, P.Figuera, M.Freer, J.E.Garcia-Ramos, J.Gomez-Camacho, M.Gulino, O.R.Kakuee, I.Martel, C.Metelko, F.Perez-Bernal, J.Rahighi, K.Rusek, D.Smirnov, O.Tengblad, V.Ziman

α-particle production in the scattering of 6He by 208Pb at energies around the Coulomb barrier

NUCLEAR REACTIONS 208Pb(6He, α), E=14, 16, 18, 22 MeV; measured Eα, Iα, σ(E, θ); deduced reaction mechanism features using DWBA analysis.

doi: 10.1016/j.nuclphysa.2007.05.012
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2007FE09      Prog.Part.Nucl.Phys. 59, 389 (2007)

B.Fernandez-Dominguez, R.C.Lemmon, C.Timis, M.Labiche, W.N.Catford, M.Chartier, N.I.Ashwood, N.Amzal, T.D.Baldwin, M.Burns, L.Caballero, R.Chapman, N.Curtis, G.de France, M.Freer, W.Gelletly, X.Liang, N.A.Orr, S.D.Pain, V.P.E.Pucknell, M.Rejmund, B.Rubio, H.Savajols, O.Sorlin, K.Spohr, C.Thiesen, D.D.Warner

Single particle structure of exotic nuclei with transfer reactions

NUCLEAR REACTIONS 2H(24Ne, x), E=10 MeV/nucleon; measured Eγ, (particle)γ-coinc using EXOGAM. 25Ne; deduced level energies, J, π and spectroscopic factors.

doi: 10.1016/j.ppnp.2007.01.002
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2007FR05      J.Phys.(London) G34, 789 (2007)

M.Freer

Can α-α correlations be used to measure the size of 12C excited states?

NUCLEAR REACTIONS 12C(12C, 3α), E=104, 106 MeV; measured Eα, αα-coin, relative velocity spectra; deduced no strong Coulomb repulsion or quantum statistics effects.

doi: 10.1088/0954-3899/34/5/001
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2007FR17      Phys.Rev. C 76, 034320 (2007)

M.Freer, I.Boztosun, C.A.Bremner, S.P.G.Chappell, R.L.Cowin, G.K.Dillon, B.R.Fulton, B.J.Greenhalgh, T.Munoz-Britton, M.P.Nicoli, W.D.M.Rae, S.M.Singer, N.Sparks, D.L.Watson, D.C.Weisser

Reexamination of the excited states of 12C

NUCLEAR REACTIONS 12C(12C, 3α), E=82-106 MeV; analyzed energy and angular distributions data. 8Be deduced levels.

doi: 10.1103/PhysRevC.76.034320
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2007FR22      Rep.Prog.Phys. 70, 2149 (2007)

M.Freer

The clustered nucleus-cluster structures in stable and unstable nuclei

NUCLEAR STRUCTURE 16O, 20Ne, 24Mg, 28Si, 32S, 36Ar, 40Ca, 44Ti; analyzed alpha cluster model calculations for 2D structures. 8Be; analyzed Greens function Monte Carlo calculations. 4He, 8Be, 12C, 16O, 20Ne, 24Mg, 28Si; analyzed binding energy per nucleon versus the number of α-α bonds, geometric α-particle structures.8Be, 12C, 16O; analyzed density of harmonic oscillator configurations. 16O, 20Ne, 8Be, 9Be, 10Be; analyzed rotational bands. 9Be, 13C, 17O, 21Ne, 25Mg; analyzed coefficients of the single-particle wave-functions in the molecular orbits of prolate nuclei. 9Be; analyzed generator coordinate method calculations. 6,7,8,9,10,11,12,13,14Be, 11,13,15,17,19B; analyzed density distributions of ground states using antisymmetrized molecular dynamics method. 12C, 16O, 20Ne, 24Mg, 28Si, 32S, 36Ar, 40Ca, 44Ti; analyzed properties of minima in the Nilsson-Strutinsky calculations. 13C; analyzed proposed rotational bands. 7,9Li, 10,11,12Be, 9,11B, 10,12,13,14,15C, 16C; analyzed E2 strengths and electric quadrupole moments. Compared experimental data with antisymmetrized molecular dynamics method calculations.

NUCLEAR REACTIONS 12C(α, 8Be), (12C, γ), (12C, 20Ne), (16O, 24Mg), (24Mg, 24Mg), (16O, 28Si), (20Ne, 24Mg), E not given; 16O(16O, 32S), E not given; analyzed resulting cluster structures, magic numbers, 8p-4h states. 8Be(8Be, 16O), E not given; analyzed α-particle arrangement in 16O.

doi: 10.1088/0034-4885/70/12/R03
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2007MI47      Eur.Phys.J. Special Topics 150, 43 (2007)

M.Milin, A.Maggio, L.Acosta, M.A.G.Alvarez, C.Angulo, E.Casarejos, N.de Sereville, A.Di Pietro, P.Figuera, M.Fisichella, M.Freer, Th.Keutgen, M.Lattuada, M.Majer, I.Martel, D.Miljanic, F.Pansini, D.Price, A.M.Sanchez-Benitez, N.Soic, M.Uroic, M.Zadro

Reactions induced by 35MeV 6He beam on 12C and 14C

doi: 10.1140/epjst/e2007-00262-0
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2007PA21      Phys.Rev. C 75, 045803 (2007)

P.Papka, T.A.D.Brown, B.R.Fulton, D.L.Watson, S.P.Fox, D.Groombridge, M.Freer, N.M.Clarke, N.I.Ashwood, N.Curtis, V.Ziman, P.McEwan, S.Ahmed, W.N.Catford, D.Mahboub, C.N.Timis, T.D.Baldwin, D.C.Weisser

Decay path measurements for the 2.429 MeV state in 9Be: Implications for the astrophysical α + α + n reaction

NUCLEAR REACTIONS 9Be(6Li, 6Li'), E=60 MeV; measured Eα, Iα, αα-coin, angular correlations following break-up. 9Be deduced excited state partial decay widths, branching ratios. Astrophysical implications discussed.

doi: 10.1103/PhysRevC.75.045803
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2007PR02      Phys.Rev. C 75, 014305 (2007)

D.L.Price, M.Freer, N.I.Ashwood, N.M.Clarke, N.Curtis, L.Giot, V.Lima, P.McEwan, B.Novatski, N.A.Orr, S.Sakuta, J.A.Scarpaci, D.Stepanov, V.Ziman

α decay of excited states in 14C

NUCLEAR REACTIONS 14C(14C, α10Be), E=98.2 MeV; measured charged particle spectra. 14C deduced excited states energies, J, π, α-decay properties.

doi: 10.1103/PhysRevC.75.014305
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2007SU18      Phys.Lett. B 650, 124 (2007)

N.C.Summers, S.D.Pain, N.A.Orr, W.N.Catford, J.C.Angelique, N.I.Ashwood, V.Bouchat, N.M.Clarke, N.Curtis, M.Freer, B.R.Fulton, F.Hanappe, M.Labiche, J.L.Lecouey, R.C.Lemmon, D.Mahboub, A.Ninane, G.Normand, F.M.Nunes, N.Soic, L.Stuttge, C.N.Timis, I.J.Thompson, J.S.Winfield, V.Ziman

B(E1) strengths from Coulomb excitation of 11Be

NUCLEAR REACTIONS 208Pb(11Be, 11Be'), E=38.6 MeV/nucleon; measured Coulomb excitation σ. 11Be deduced B(E1) strengths; calculated σ. Extended continuum discretized coupled channels method. Comparison with previous data.

doi: 10.1016/j.physletb.2007.05.003
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2006AS01      J.Phys.(London) G32, 463 (2006)

N.I.Ashwood, M.Freer, S.Sakuta, S.Ahmed, N.M.Clarke, N.Curtis, P.McEwan, C.J.Metelko, B.Novatski, N.Soic, D.Stepanov, V.Ziman

Cluster breakup of 18O and 22Ne

NUCLEAR REACTIONS 9Be(18O, α14C), (18O, 10Be12C), (18O, 9Be13C), E=136, 148.5 MeV; measured excitation energy spectra. 18O deduced levels, J, π, octupole deformed band, α-decay features. 22Ne deduced no evidence for population of excited states.

doi: 10.1088/0954-3899/32/4/005
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2006CU01      Phys.Rev. C 73, 057301 (2006)

N.Curtis, N.I.Ashwood, L.T.Baby, T.D.Baldwin, T.R.Bloxham, W.N.Catford, D.D.Caussyn, M.Freer, C.W.Harlin, P.McEwan, D.L.Price, D.Spingler, I.Wiedenhover

α-decaying states in 10, 12Be populated in the 10Be(14C, 10, 12Be) reaction

NUCLEAR REACTIONS 10Be(14C, α6He), E=88.5 MeV; measured particle spectra, σ. 10Be deduced level energies. 10Be(14C, 26He), (14C, α8He), E=88.5 MeV; measured σ upper limits.

doi: 10.1103/PhysRevC.73.057301
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2006FR01      Phys.Rev.Lett. 96, 042501 (2006)

M.Freer, E.Casarejos, L.Achouri, C.Angulo, N.I.Ashwood, N.Curtis, P.Demaret, C.Harlin, B.Laurent, M.Milin, N.A.Orr, D.Price, R.Raabe, N.Soic, V.A.Ziman

α:2n:α Molecular Band in 10Be

NUCLEAR REACTIONS 4He(6He, 6He), E=6.1, 7.5, 11.1 MeV; measured Eα, (6He)α-coin, σ(θ). 10Be deduced resonance energy, J, π, width, molecular structure.

doi: 10.1103/PhysRevLett.96.042501
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2006FR16      J.Phys.(London) G32, 2235 (2006)

M.Freer, S.Ahmed, N.I.Ashwood, N.M.Clarke, N.Curtis, C.J.Metelko, S.Yildiz, V.A.Ziman, N.Soic, B.Novatski, S.Sakuta, N.A.Orr, B.R.Fulton, R.Pitkin

8Be + 14C break-up of 22Ne

NUCLEAR REACTIONS 12C(18O, 2α14C), E=140 MeV; measured particle spectra. 22Ne deduced level energies, possible cluster structure.

doi: 10.1088/0954-3899/32/11/015
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2006PA04      Phys.Rev.Lett. 96, 032502 (2006)

S.D.Pain, W.N.Catford, N.A.Orr, J.C.Angelique, N.I.Ashwood, V.Bouchat, N.M.Clarke, N.Curtis, M.Freer, B.R.Fulton, F.Hanappe, M.Labiche, J.L.Lecouey, R.C.Lemmon, D.Mahboub, A.Ninane, G.Normand, N.Soic, L.Stuttge, C.N.Timis, J.A.Tostevin, J.S.Winfield, V.Ziman

Structure of 12Be: Intruder d-Wave Strength at N = 8

NUCLEAR REACTIONS C(12Be, n11Be), E=39.3 MeV/nucleon; measured En, Eγ, projectile-like fragments spectra, relative energy spectra; deduced σ(E). 11Be deduced excited states, spectroscopic factors. 12Be deduced ground state configuration.

doi: 10.1103/PhysRevLett.96.032502
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2006PR01      Nucl.Phys. A765, 263 (2006)

D.L.Price, M.Freer, S.Ahmed, N.I.Ashwood, N.M.Clarke, N.Curtis, P.McEwan, C.J.Metelko, B.Novatski, S.Sakuta, N.Soic, D.Stepanov, V.Ziman

Alpha-decay of excited states in 13C and 14C

NUCLEAR REACTIONS 14C(13C, α9Be), (13C, α10Be), E=77.8, 112.25, 119.25 MeV; measured fragment energy spectra, σ(θ). 13,14C deduced excited states energies, J, π, α-decay features, α-cluster structure. Comparison with earlier work.

doi: 10.1016/j.nuclphysa.2005.11.004
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2006YI01      Phys.Rev. C 73, 034601 (2006)

S.Yildiz, M.Freer, N.Soic, S.Ahmed, N.I.Ashwood, N.M.Clarke, N.Curtis, B.R.Fulton, C.J.Metelko, B.Novatski, N.A.Orr, R.Pitkin, S.Sakuta, V.A.Ziman

α-decaying states 18O, 20Ne and 22Ne in 18O beam induced reactions

NUCLEAR REACTIONS 12C(18O, α14C), (18O, α16O), (18O, α18O), E=140 MeV; measured charged particle spectra, angular correlations. 18O, 20,22Ne deduced levels, J, π, configurations, cluster structure.

doi: 10.1103/PhysRevC.73.034601
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2005AS04      Phys.Rev. C 72, 024314 (2005)

N.I.Ashwood, M.Freer, D.J.Millener, N.A.Orr, F.Carstoiu, S.Ahmed, J.C.Angelique, V.Bouchat, W.N.Catford, N.M.Clarke, N.Curtis, F.Hanappe, M.Horoi, Y.Kerckx, J.L.Lecouey, F.M.Marques, T.Materna, G.Normand, S.Pain, N.Soic, C.Timis, A.Unshakova, V.A.Ziman

High-energy two-neutron removal from 10Be

NUCLEAR REACTIONS 12C(10Be, 2α), (10Be, n2α), E=30 MeV/nucleon; measured En, Eα, relative energy spectra, σ(E). 8,9Be deduced levels, J, π. Kinematically complete measurement.

doi: 10.1103/PhysRevC.72.024314
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1402.


2005CA44      J.Phys.(London) G31, S1655 (2005)

W.N.Catford, C.N.Timis, R.C.Lemmon, M.Labiche, N.A.Orr, L.Caballero, R.Chapman, M.Freer, M.Chartier, H.Savajols, M.Rejmund, N.Amzal, N.I.Ashwood, T.D.Baldwin, M.Burns, N.Curtis, G.de France, W.Gelletly, X.Liang, S.D.Pain, V.P.E.Pucknell, B.Rubio, O.Sorlin, K.Spohr, Ch.Theisen, D.D.Warner

Nucleon transfer via (d, p) using TIARA with a 24Ne radioactive beam

NUCLEAR REACTIONS 2H(24Ne, p), E=10 MeV/nucleon; measured Ep, Eγ, pγ-coin, σ(θ). 25Ne deduced levels, J, π.

doi: 10.1088/0954-3899/31/10/049
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1294.


2005CU06      Phys.Rev. C 72, 044320 (2005)

N.Curtis, N.I.Ashwood, W.N.Catford, N.M.Clarke, M.Freer, D.Mahboub, C.J.Metelko, S.D.Pain, N.Soic, D.C.Weisser

α+Li and H+Be decay of 10, 11, 12B

NUCLEAR REACTIONS 7Li(7Li, 11B), (7Li, 12B), E=58 MeV; 12C, 16O(7Li, 10B), E=58 MeV; measured particle spectra. 10,11,12B deduced relative yields for α+Li and H+Be decay channels from excited states.

doi: 10.1103/PhysRevC.72.044320
Citations: PlumX Metrics


2005FR14      Phys.Rev. C 71, 047305 (2005)

M.Freer, I.Boztosun, C.A.Bremner, S.P.G.Chappell, R.L.Cowin, G.K.Dillon, B.R.Fulton, B.J.Greenhalgh, M.P.Nicoli, W.D.M.Rae, S.M.Singer, D.L.Watson, D.C.Weisser

8Be + 12C(0+2) decay of excited states in 20Ne

NUCLEAR REACTIONS 12C(12C, 8Be12C), E=82-120 MeV; measured particle spectra, angular distributions. 20Ne deduced possible resonance states energies, J, π.

doi: 10.1103/PhysRevC.71.047305
Citations: PlumX Metrics


2005FR30      J.Phys.(London) G31, S1795 (2005)

M.Freer, for the CHARISSA Collaboration

Alpha-particle states in 16O and 20Ne

NUCLEAR REACTIONS 12C(12C, 28Be), (12C, 8Be12C), E=82-93excitation energy spectra, angular correlations. 16O, 20Ne deduced cluster structure.

doi: 10.1088/0954-3899/31/10/075
Citations: PlumX Metrics


2005JE03      Phys.Rev. C 71, 041301 (2005)

D.G.Jenkins, B.R.Fulton, J.Pearson, C.J.Lister, M.P.Carpenter, S.J.Freeman, N.J.Hammond, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, A.H.Wuosmaa, P.Fallon, A.Gorgen, A.O.Macchiavelli, M.McMahan, M.Freer, F.Haas

Doorway states as a principal decay pathway in 12C(12C, γ) radiative capture

NUCLEAR REACTIONS 12C(12C, γ), E(cm) ≈ 8 MeV; measured Eγ, Iγ, σ; deduced role of doorway states. Gammasphere array.

doi: 10.1103/PhysRevC.71.041301
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1228.


2005JE06      Nucl.Phys. A758, 749c (2005)

D.G.Jenkins, B.R.Fulton, C.J.Lister, R.V.F.Janssens, T.L.Khoo, E.F.Moore, K.E.Rehm, B.Truett, A.H.Wuosmaa, M.Freer, J.Jose

Reevaluation of the 22Na(p, γ) reaction rate

NUCLEAR REACTIONS 12C(12C, p), (12C, n), E=22 MeV; measured Eγ, Iγ, γγ-coin. 23Mg levels deduced J, π. 22Na(p, γ), E=low; calculated astrophysical reaction rate, resonance contributions. Gammasphere array.

doi: 10.1016/j.nuclphysa.2005.05.134
Citations: PlumX Metrics


2005LA28      J.Phys.(London) G31, S1691 (2005)

M.Labiche, C.N.Timis, R.C.Lemmon, W.N.Catford, R.Chapman, N.Amzal, N.I.Ashwood, T.D.Baldwin, M.Burns, L.Caballero, M.Chartier, N.Curtis, G.de France, W.Gelletly, X.Liang, M.Freer, N.A.Orr, S.D.Pain, V.P.E.Pucknell, M.Rejmund, B.Rubio, H.Savajols, O.Sorlin, K.Spohr, Ch.Theisen, D.D.Warner

Study of transfer reactions in inverse kinematics with the TIARA array

NUCLEAR REACTIONS 2H(14N, p), E=10.6 MeV/nucleon; measured Ep, Eγ, σ(θ). Comparison with previous results.

doi: 10.1088/0954-3899/31/10/055
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1649.


2005LA35      Rom.J.Phys. 50, 657 (2005)

M.Labiche, C.N.Timis, R.C.Lemmon, W.N.Catford, R.Chapman, B.Rubio, L.Caballero, N.Amzal, N.I.Ashwood, T.D.Baldwin, M.Burns, M.Chartier, N.Curtis, G.De France, W.Gelletly X.Liang, M.Freer, N.A.Orr, S.Pain, V.P.E.Pucknell, M.Rejmund, H.Savajols, O.Sorlin, K.Spohr, C.Theisen, D.D.Warner

Nucleon transfer reaction studies at GANIL using radioactive nuclear beams

NUCLEAR REACTIONS 2H(24Ne, t), (24Ne, 3He), E=10 MeV; measured particle spectra, σ(θ).


2005MC12      J.Phys.(London) G31, S1921 (2005)

P.McEwan, M.Freer, N.Ashwood, N.Curtis, D.Price, V.Ziman, H.G.Bohlen, Tz.Kokalova, Ch.Schulz, R.Torabi, W.von Oertzen, C.Wheldon, T.N.Massey, R.Kalpakchieva, W.Catford

Investigation into the structure of 14C using recoil co-incidence techniques

NUCLEAR REACTIONS 12C(16O, 14O), E not given; measured excitation energy spectra. 14C deduced decay branch widths.

doi: 10.1088/0954-3899/31/10/102
Citations: PlumX Metrics


2005PA68      Eur.Phys.J. A 25, Supplement 1, 349 (2005)

S.D.Pain, W.N.Catford, N.A.Orr, J.C.Angelique, N.I.Ashwood, V.Bouchat, N.M.Clarke, N.Curtis, M.Freer, B.R.Fulton, F.Hanappe, M.Labiche, J.L.Lecouey, R.C.Lemmon, D.Mahboub, A.Ninane, G.Normand, N.Soic, L.Stuttge, C.N.Timis, J.A.Tostevin, J.S.Winfield, V.Ziman

Experimental evidence of a ν(1d5/2)2component to the 12Be ground state

NUCLEAR REACTIONS C(12Be, n11Be), E=39.3 MeV/nucleon; measured En, Eγ, projectile-like fragments spectra, relative energy spectra; deduced σ(E). 11Be deduced excited states. 12Be deduced ground state configuration. Kinematically complete measurement.

doi: 10.1140/epjad/i2005-06-186-9
Citations: PlumX Metrics


2005SA52      J.Phys.(London) G31, S1953 (2005)

A.M.Sanchez-Benitez, D.Escrig, M.A.G.Alvarez, M.V.Andres, C.Angulo, M.J.G.Borge, J.Cabrera, S.Cherubini, J.M.Espino, P.Figuera, M.Freer, J.E.Garcia-Ramos, J.Gomez-Camacho, M.Gulino, O.R.Kakuee, I.Martel, C.Metelco, A.M.Moro, J.Rahighi, K.Rusek, D.Smirnov, O.Tengblad, P.Van Duppen, V.Ziman

Scattering of 6He at energies around the Coulomb barrier

NUCLEAR REACTIONS 208Pb(6He, 6He), (6He, α), E=14, 16, 17, 18, 22 MeV; measured σ(θ); deduced reaction mechanism features.

doi: 10.1088/0954-3899/31/10/109
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1292.


2005SO13      J.Phys.(London) G31, S1701 (2005)

N.Soic, M.Freer, L.Donadille, N.M.Clarke, P.J.Leask, W.N.Catford, K.L.Jones, D.Mahboub, B.R.Fulton, B.J.Greenhalgh, D.L.Watson, D.C.Weisser

Three-centre cluster structure in 11C and 11B

NUCLEAR REACTIONS 16O(9Be, α7Be), 7Li(9Be, α7Li), (9Be, t2α), E=55, 70 MeV; measured excitation energy spectra. 11B, 11C deduced excited states energies, configurations.

doi: 10.1088/0954-3899/31/10/057
Citations: PlumX Metrics


2004AH02      Phys.Rev. C 69, 024303 (2004)

S.Ahmed, M.Freer, J.C.Angelique, N.I.Ashwood, V.Bouchat, W.N.Catford, N.M.Clarke, N.Curtis, F.Hanappe, J.C.Lecouey, F.M.Marques, T.Materna, A.Ninane, G.Normand, N.A.Orr, S.Pain, N.Soic, C.Timis, A.Unshakova, V.A.Ziman

Breakup reaction studies of 10Be and 10, 11B using a 10Be beam

NUCLEAR REACTIONS 12C(10Be, α6He), (10Be, 2nα), (10Be, 2α), (10Be, α6Li), (10Be, α7Li), E=302 MeV; measured particle spectra, σ; deduced reaction mechanism features. 10Be deduced levels, possible J, π.

doi: 10.1103/PhysRevC.69.024303
Citations: PlumX Metrics


2004AH06      Nucl.Phys. A738, 507 (2004)

S.Ahmed, M.Freer

Breakup reaction studies of 10Be and 10, 11B using a 10Be beam

NUCLEAR REACTIONS 12C(10Be, α6He), (10Be, α6Li), (10Be, α7Li), E=302 MeV; measured particle spectra. 10Be, 10,11Be deduced excited states.

doi: 10.1016/j.nuclphysa.2004.04.098
Citations: PlumX Metrics


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Note: The following list of authors and aliases matches the search parameter M.Freer: , M.A.FREER