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NSR database version of April 26, 2024.

Search: Author = J.M.Allen

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2023HU12      Phys.Rev. C 107, 064612 (2023)

S.Hudan, J.E.Johnstone, R.Kumar, R.T.deSouza, J.Allen, D.W.Bardayan, D.Blankstein, C.Boomershine, S.Carmichael, A.Clark, S.Coil, S.L.Henderson, P.D.O'Malley, W.W.von Seeger

Quantifying resonance behavior in the fusion of ¹⁷O with ¹²C at above-barrier energies

NUCLEAR REACTIONS ¹²C(¹⁷O, X)²⁹Si, E=47, 47.5, 48, 55 MeV; measured reaction products, evaporation residues, charged particles; deduced fusion excitation functions, fusion σ(E). Comparison to other experimental data including fusion data on ¹⁷F+¹²C system. Systematics of the fusion σ for ^16,17,18,19+¹²C systems. Gas filled (CH₄) active target MuSIC@Indiana at the University of Notre Dame Nuclear Science Laboratory.

doi: 10.1103/PhysRevC.107.064612
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2023KO21      Phys.Rev. C 108, 034601 (2023)

J.Kovoor, K.L.Jones, J.Hooker, M.Vostinar, R.Kanungo, S.D.Pain, M.Alcorta, J.Allen, C.Andreoiu, L.Atar, D.W.Bardayan, S.S.Bhattacharjee, D.Blankstein, C.Burbadge, S.Burcher, W.N.Catford, S.Cha, K.Chae, D.Connolly, B.Davids, N.E.Esker, F.H.Garcia, S.Gillespie, R.Ghimire, A.Gula, G.Hackman, S.Hallam, M.Hellmich, J.Henderson, M.Holl, P.Jassal, S.King, T.Knight, R.Kruecken, A.Lepailleur, J.Liang, L.Morrison, P.D.O'Malley, X.Pereira-Lopez, A.Psaltis, A.Radich, J.Refsgaard, A.C.Shotter, M.Williams, O.Workman

Structure studies of ¹³Be from the ¹²Be(d, p) reaction in inverse kinematics on a solid deuteron target

doi: 10.1103/PhysRevC.108.034601
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Data from this article have been entered in the XUNDL database. For more information, click here.

2020HA03      Phys.Rev. C 101, 015804 (2020)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

γ-ray spectroscopy of astrophysically important states in ³⁹Ca

NUCLEAR REACTIONS ⁴⁰Ca(³He, αγ)³⁹Ca, E=30 MeV; Measured Eγ, Iγ, Eα, Iα, αγ-coin, reaction products using the GODDESS array (Gammasphere for γ detection and ORRUBA for particle detection) at the ATLAS-ANL facility. ³⁹Ca; deduced levels, J, π, γ-branching ratios. ³⁸K(p, γ)³⁹Ca, T=0.1-0.4 GK; deduced resonance parameters, astrophysical reaction rates. Discussed impact on abundances of isotopes created at the endpoint of nova nucleosynthesis.

doi: 10.1103/PhysRevC.101.015804
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2454. Data from this article have been entered in the XUNDL database. For more information, click here.

2020HA31      Phys.Rev. C 102, 045802 (2020)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

¹⁹Ne level structure for explosive nucleosynthesis

NUCLEAR REACTIONS ¹⁹F(³He, t)¹⁹Ne, E=30 MeV; measured reaction products, E(t), I(t), Eγ, Iγ, (triton)γ-, and (triton)γγ-coin using ORRUBA array with Micron QQQ5 telescopes for tritons and Gammasphere array for γ rays at ATLAS-ANL facility. ¹⁹Ne; deduced levels, J, π, γ-branching ratios. Comparison with earlier experimental results and with evaluated data. ¹⁸F(p, α)¹⁵O, E(cm)<0.9 MeV; calculated astrophysical S factors, and reaction rates at temperature of 0.06 to 0.4 GK.

doi: 10.1103/PhysRevC.102.045802
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Data from this article have been entered in the XUNDL database. For more information, click here.

2019BU01      Phys.Rev. C 99, 015501 (2019)

D.P.Burdette, M.Brodeur, T.Ahn, J.Allen, D.W.Bardayan, F.D.Becchetti, D.Blankstein, G.Brown, B.Frentz, M.R.Hall, S.King, J.J.Kolata, J.Long, K.T.Macon, A.Nelson, P.D.O'Malley, C.Seymour, M.Skulski, S.Y.Strauss, A.A.Valverde

Resolving the discrepancy in the half-life of ²⁰F

RADIOACTIVITY ²⁰F(β^-)[from ²H(¹⁹F, p), E=46.0 MeV followed by separation of the radioactive beam using TwinSol]; measured T_1/2 of ²⁰F g.s. from β-decay curves using plastic scintillator for β^- detection at the University of Notre Dame Nuclear Science Laboratory; deduced recommended average half-life by considering a selection from compiled previous experimental values.

doi: 10.1103/PhysRevC.99.015501
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Data from this article have been entered in the XUNDL database. For more information, click here.

2019GL02      Phys.Rev. C 99, 065801 (2019)

B.E.Glassman, D.Perez-Loureiro, C.Wrede, J.Allen, D.W.Bardayan, M.B.Bennett, K.A.Chipps, M.Febbraro, M.Friedman, C.Fry, M.R.Hall, O.Hall, S.N.Liddick, P.O'Malley, W.-J.Ong, S.D.Pain, S.B.Schwartz, P.Shidling, H.Sims, L.J.Sun, P.Thompson, H.Zhang

Doppler broadening in ²⁰Mg(βpγ)¹⁹Ne decay

RADIOACTIVITY ²⁰Mg(β⁺p)[²⁰Mg beam from ⁹Be(²⁴Mg, X), E=170 MeV/nucleon, followed by separation using A1900 separator at NSCL-MSU]; measured Eβ⁺, Eγ, Iγ, β⁺γ-coin, γ-decay branching ratios, and E(p) using plastic scintillator for β detection and the SeGA array for γ detection. ¹⁹Ne; deduced levels, J, π, half-life of 1507.5 level from Doppler broadening analysis, β⁺p feedings. Comparison with previous experimental values. Discussed relevance to ¹⁵O(α, γ)¹⁹Ne thermonuclear reaction rates.

NUCLEAR REACTIONS ⁹Be(²⁴Mg, X)¹⁵N/¹⁶O/¹⁷F/¹⁸Ne/²⁰Mg, E=170 MeV/nucleon; measured time of flight, particle identification plot, yields using A1900 fragment separator at the K500 and K1200 coupled cyclotrons of NSCL-MSU.

doi: 10.1103/PhysRevC.99.065801
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Data from this article have been entered in the XUNDL database. For more information, click here.

2019HA08      Phys.Rev.Lett. 122, 052701 (2019)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

Key ¹⁹Ne States Identified Affecting γ-Ray Emission from ¹⁸F in Novae

NUCLEAR REACTIONS ¹⁹F(³He, t)¹⁹Ne, E=30 MeV; measured reaction products, Eγ, Iγ; deduced γ-ray energies, J, π, S-factor, reaction rates, resonance energies. Comparison with available data.

doi: 10.1103/PhysRevLett.122.052701
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Data from this article have been entered in the XUNDL database. For more information, click here.

2019HA14      Phys.Rev. C 99, 035805 (2019)

M.R.Hall, D.W.Bardayan, T.Baugher, A.Lepailleur, S.D.Pain, A.Ratkiewicz, S.Ahn, J.M.Allen, J.T.Anderson, A.D.Ayangeakaa, J.C.Blackmon, S.Burcher, M.P.Carpenter, S.M.Cha, K.Y.Chae, K.A.Chipps, J.A.Cizewski, M.Febbraro, O.Hall, J.Hu, C.L.Jiang, K.L.Jones, E.J.Lee, P.D.O'Malley, S.Ota, B.C.Rasco, D.Santiago-Gonzalez, D.Seweryniak, H.Sims, K.Smith, W.P.Tan, P.Thompson, C.Thornsberry, R.L.Varner, D.Walter, G.L.Wilson, S.Zhu

New γ-ray transitions observed in ¹⁹Ne with implications for the ¹⁵O(α, γ)¹⁹Ne reaction rate

NUCLEAR REACTIONS ¹⁹F(³He, t), E=30 MeV; measured triton spectra, Eγ, Iγ, tγ- and γγ-coin using Gammasphere array for γ detection with the silicon detector array ORRUBA Dual Detectors for Experimental Structure Studies (GODDESS) at ATLAS-ANL facility. ¹⁹Ne; deduced levels, J, π, and γ-branching ratios for the decay of 4.14- and 4.20-MeV states. ¹⁵O(α, γ)¹⁹Ne, E≈18-180 keV; calculated fractional contribution of the corrected branching ratios for the 4.14 MeV, 7/2- and 4.20 MeV, 9/2- states in ¹⁹Ne to astrophysical reaction rate, which is of significance in breakout from the hot CNO cycle in type I x-ray bursts. Comparison with previous experimental values.

doi: 10.1103/PhysRevC.99.035805
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Data from this article have been entered in the XUNDL database. For more information, click here.

2019HE11      Phys.Rev. C 99, 064320 (2019)

S.L.Henderson, T.Ahn, M.A.Caprio, P.J.Fasano, A.Simon, W.Tan, P.O'Malley, J.Allen, D.W.Bardayan, D.Blankstein, B.Frentz, M.R.Hall, J.J.Kolata, A.E.McCoy, S.Moylan, C.S.Reingold, S.Y.Strauss, R.O.Torres-Isea

First measurement of the B(E2; 3/2^- → 1/2^-) transition strength in ⁷Be: Testing ab initio predictions for A = 7 nuclei

NUCLEAR REACTIONS ¹⁹⁷Au(⁷Be, ⁷Be'), E=31.3 MeV, [secondary ⁷Be beam from ²H(⁶Li, n), E=34.0 MeV primary reaction]; measured reaction products, particle spectra, Eγ, Iγ, (particle)γ-coin using silicon detector for charged particle detection and HPGe detectors for γ detection at the University of Notre Dame FN Tandem Van de Graaff accelerator facility. ⁷Be; deduced levels, J, π, Coulomb excitation cross section, B(E2) for 3/2- to 1/2- (g.s. to the first excited state) transition. Comparison with ab initio no-core shell model (NCSM) calculations.

doi: 10.1103/PhysRevC.99.064320
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Data from this article have been entered in the XUNDL database. For more information, click here.

2018GL01      Phys.Lett. B 778, 397 (2018)

B.E.Glassman, D.Perez-Loureiro, C.Wrede, J.Allen, D.W.Bardayan, M.B.Bennett, B.A.Brown, K.A.Chipps, M.Febbraro, M.Friedman, C.Fry, M.R.Hall, O.Hall, S.N.Liddick, P.O'Malley, W.J.Ong, S.D.Pain, C.Prokop, S.B.Schwartz, P.Shidling, H.Sims, P.Thompson, H.Zhang

β-delayed γ decay of ²⁰Mg and the ₁₉Ne(p, γ)²⁰Na breakout reaction in Type I X-ray bursts

RADIOACTIVITY ²⁰Mg(β⁺) [from ⁹Be(²⁴Mg, X)²⁰Mg, E=170 MeV/nucleon]; measured decay products, Eβ, Iβ, Eγ, Iγ; deduced γ-ray energies and limits on intensities of β-delayed γ-rays, Gamow-Teller strengths B(GT) and associated log ft values. Comparison with theoretical calculations.

doi: 10.1016/j.physletb.2018.01.041
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Data from this article have been entered in the XUNDL database. For more information, click here.

2018JO04      Acta Phys.Pol. B49, 365 (2018)

K.L.Jones, C.Thornsberry, J.Allen, A.Atencio, D.W.Bardayan, D.Blankstein, S.Burcher, A.B.Carter, K.A.Chipps, J.A.Cizewski, I.Cox, Z.Elledge, M.Febbraro, A.Fijalkowska, R.Grzywacz, M.R.Hall, T.T.King, A.Lepailleur, M.Madurga, S.T.Marley, P.D.O'Malley, S.V.Paulauskas, S.D.Pain, W.A.Peters, C.Reingold, K.Smith, S.Taylor, W.Tan, M.Vostinar, D.Walter

Development of the (d, n) Proton-transfer Reaction in Inverse Kinematics for Structure Studies

doi: 10.5506/aphyspolb.49.365
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2018VA04      Phys.Rev. C 97, 035503 (2018)

A.A.Valverde, M.Brodeur, T.Ahn, J.Allen, D.W.Bardayan, F.D.Becchetti, D.Blankstein, G.Brown, D.P.Burdette, B.Frentz, G.Gilardy, M.R.Hall, S.King, J.J.Kolata, J.Long, K.T.Macon, A.Nelson, P.D.O'Malley, M.Skulski, S.Y.Strauss, B.Vande Kolk

Precision half-life measurement of ¹¹C: The most precise mirror transition Ft value

RADIOACTIVITY ¹¹C(β⁺), (EC)[from ²H(¹⁰B, n), E=32.5 MeV at the Nuclear Science Laboratory of University of Notre Dame, followed by mass separation of ¹¹C ions by TwinSol mass separator and implanted in a thick tantalum foil in NSL β-counting station]; measured Eβ, Iβ, half-life of ¹¹C decay; deduced Ft^mirror, Gamow-Teller-to-Fermi mixing ratio ρ, β asymmetry parameter A_b, β-neutrino angular correlation parameter a_βν, neutrino asymmetry parameter B_n. Comparison with literature values.

NUCLEAR REACTIONS ²H(¹⁰B, n)⁴He/⁹Be/¹⁰B/¹¹C, E=32.5 MeV; measured yields for ions using TwinSol mass separator at University of Notre Dame.

doi: 10.1103/PhysRevC.97.035503
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Data from this article have been entered in the XUNDL database. For more information, click here.

2017LO09      Phys.Rev. C 96, 015502 (2017)

J.Long, T.Ahn, J.Allen, D.W.Bardayan, F.D.Becchetti, D.Blankstein, M.Brodeur, D.Burdette, B.Frentz, M.R.Hall, J.M.Kelly, J.J.Kolata, P.D.O'Malley, B.E.Schultz, S.Y.Strauss, A.A.Valverde

Precision half-life measurement of ²⁵Al

RADIOACTIVITY ²⁵Al(EC), (β⁺)[from ²H(²⁴Mg, n) at the NSL tandem accelerator facility of the University of Notre Dame]; measured Eβ, Iβ, half-life of ²⁵Al decay; deduced world-averaged half-life, Fermi to Gamow-Teller mixing ratio ρ and correlation parameters, and values for various parameters of relevance for determining the V_ud term from the ²⁵Al mirror transition. Comparison with previous measurements.

doi: 10.1103/PhysRevC.96.015502
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Data from this article have been entered in the XUNDL database. For more information, click here.

2017WR02      Phys.Rev. C 96, 032801 (2017)

C.Wrede, B.E.Glassman, D.Perez-Loureiro, J.M.Allen, D.W.Bardayan, M.B.Bennett, B.A.Brown, K.A.Chipps, M.Febbraro, C.Fry, M.R.Hall, O.Hall, S.N.Liddick, P.O'Malley, W.-J.Ong, S.D.Pain, S.B.Schwartz, P.Shidling, H.Sims, P.Thompson, H.Zhang

New portal to the ¹⁵O(α, γ)¹⁹Ne resonance triggering CNO-cycle breakout

RADIOACTIVITY ²⁰Mg(β⁺), (β⁺p)[from ⁹Be(²⁴Mg, X), E=170 MeV/nucleon using A1900 separator at MSU-NSCL facility]; measured Eγ, Iγ, βγ- and (implants)γ-coin using SeGA array for γ detection. ¹⁹Ne; deduced level at 4034 keV, β⁺-delayed proton branching ratio; discussed possible α-decay of 4034 level. ²⁰Mg(β⁺α); discussed possible decay branch. Relevance to hot CNO cycles during type I x-ray bursts on accreting neutron stars.

doi: 10.1103/PhysRevC.96.032801
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Data from this article have been entered in the XUNDL database. For more information, click here.

2016BR01      Phys.Rev. C 93, 025503 (2016)

M.Brodeur, C.Nicoloff, T.Ahn, J.Allen, D.W.Bardayan, F.D.Becchetti, Y.K.Gupta, M.R.Hall, O.Hall, J.Hu, J.M.Kelly, J.J.Kolata, J.Long, P.O'Malley, B.E.Schultz

Precision half-life measurement of ¹⁷F

RADIOACTIVITY ¹⁷F(β⁺)[from ²H(¹⁶O, X), E not given]; measured β radiation, half-life of ¹⁷F decay at the University of Notre Dame β-decay counting station; deduced mixing ratio ρ for the mixed transition between mirror nuclei and the correlation parameters based on Standard Model validity. Discussed uncertainty estimates. Comparison with previous experimental measurements.

NUCLEAR REACTIONS ²H(¹⁶O, X)¹²C/¹³C/¹⁴N/¹⁵O/¹⁶O/¹⁷O/¹⁷F, E not given; measured yields of reaction products at Notre Dame TwinSol facility.

doi: 10.1103/PhysRevC.93.025503
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Data from this article have been entered in the XUNDL database. For more information, click here.

2015GL03      Phys.Rev. C 92, 042501 (2015)

B.E.Glassman, D.Perez-Loureiro, C.Wrede, J.Allen, D.W.Bardayan, M.B.Bennett, B.A.Brown, K.A.Chipps, M.Febbraro, C.Fry, M.R.Hall, O.Hall, S.N.Liddick, P.O'Malley, W.Ong, S.D.Pain, S.B.Schwartz, P.Shidling, H.Sims, P.Thompson, H.Zhang

Revalidation of the isobaric multiplet mass equation for the A=20 quintet

RADIOACTIVITY ²⁰Mg(β⁺)[²⁰Mg beam from ⁹Be(²⁴Mg, X), E=170 MeV/nucleon using A1900 fragment separator at NSCL-MSU]; measured Eγ, Iγ, βγ-coin using SeGA array. ²⁰Na; deduced levels, precise energy of the T=2 state, J, π. ²⁰Mg, ²⁰Na, ²⁰Ne, ²⁰F, ²⁰O; analyzed and revalidated isobaric multiplet mass equation (IMME) for A=20, T=2 quintet.

doi: 10.1103/PhysRevC.92.042501
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Note: The following list of authors and aliases matches the search parameter J.M.Allen: , J.M.ALLEN