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NSR database version of May 24, 2024.

Search: Author = A.J.Howard

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1998UT02      Phys.Rev. C57, 2731 (1998); Erratum Phys.Rev. C58, 1354 (1998)

S.Utku, J.G.Ross, N.P.T.Bateman, D.W.Bardayan, A.A.Chen, J.Gorres, A.J.Howard, C.Iliadis, P.D.Parker, M.S.Smith, R.B.Vogelaar, M.Wiescher, K.Yildiz

Breakout from the Hot CNO Cycle: The 18F(p, γ) vs 18F(p, α) branching ratio

NUCLEAR REACTIONS 19F(3He, t), (3He, tα), (3He, pt), E=29.8 MeV; 16O(6Li, t), (6Li, 3He), E=32 MeV; measured particle spectra, tp-, tα-coin; deduced reaction rates for 18F + p. 19F deduced levels, resonance features. Astrophysical implications.

doi: 10.1103/PhysRevC.57.2731
Citations: PlumX Metrics


1996HA26      Phys.Rev. C54, 1999 (1996)

K.I.Hahn, A.Garcia, E.G.Adelberger, P.V.Magnus, A.D.Bacher, N.Bateman, G.P.A.Berg, J.C.Blackmon, A.E.Champagne, B.Davis, A.J.Howard, J.Liu, B.Lund, Z.Q.Mao, D.M.Markoff, P.D.Parker, M.S.Smith, E.J.Stephenson, K.B.Swartz, S.Utku, R.B.Vogelaar, K.Yildiz

Structure of 18Ne and the Breakout from the Hot CNO Cycle

NUCLEAR REACTIONS, ICPND 12C(12C, 6He), E=80 MeV; 16O(3He, n), E=10.9-14.5 MeV; 20Ne(p, t), E=44, 88 MeV; measured σ(θ). 18Ne deduced levels, Γ, J, π. 14O(α, p), E(cm) ≤ 2.5 MeV; calculated astrophysical S-factor vs E, astrophysical reaction rate vs temperature.

doi: 10.1103/PhysRevC.54.1999
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1144.


1996VO07      Phys.Rev. C53, 1945 (1996)

R.B.Vogelaar, L.W.Mitchell, R.W.Kavanagh, A.E.Champagne, P.V.Magnus, M.S.Smith, A.J.Howard, P.D.Parker, H.A.O'Brien

Constraining 26Al + p Resonances using 26Al(3He, d)27Si

NUCLEAR REACTIONS 26Al(3He, d), E=20 MeV; measured σ(Ed), σ(θ); deduced implications for 26Al(p, γ) stellar reaction rate, model parameters. 27Si deduced levels, resonance, spectroscopic factors.

doi: 10.1103/PhysRevC.53.1945
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0102.


1995HO25      Nucl.Instrum.Methods Phys.Res. B99, 346 (1995)

M.A.Hofstee, J.C.Blackmon, A.E.Champagne, N.P.T.Bateman, P.D.Parker, K.Yildiz, B.M.Young, R.B.Vogelaar, M.S.Smith, A.J.Howard

Investigating the Astrophysically Important E(x) = 2.646 MeV State in 20Na

NUCLEAR REACTIONS 20Ne(3He, t), E=27 MeV; measured triton spectra, tγ-coin. 20Na level deduced Γγ/Γ.

doi: 10.1016/0168-583X(95)00307-X
Citations: PlumX Metrics


1993HO10      Nucl.Instrum.Methods Phys.Res. B73, 53 (1993)

A.J.Howard

Measurement of 220Rn and 222Rn Emanation Rates for Solids

RADIOACTIVITY 220,222Rn(α); measured Eα, Iα; deduced emanation rates. Electrostatic precipitation rates.

doi: 10.1016/0168-583X(93)96053-F
Citations: PlumX Metrics


1993HO16      Nucl.Instrum.Methods Phys.Res. A325, 224 (1993)

A.J.Howard, W.P.Strange

Prototypical Search for Radioactive Superheavy Elements in Gases

RADIOACTIVITY 241Am, 212,214,218Po(α); measured α-particle count vs time; deduced prototypical device application to superheavy element searches in atmosphere or isolated gases components. Electrostatic precipitation devices.

doi: 10.1016/0168-9002(93)91024-H
Citations: PlumX Metrics


1992SM03      Nucl.Phys. A536, 333 (1992)

M.S.Smith, P.V.Magnus, K.I.Hahn, A.J.Howard, P.D.Parker, A.E.Champagne, Z.Q.Mao

A High-Resolution Study of the 20Ne(3He, t)20Na Reaction and the 19Ne(p, γ)20Na Reaction Rate

NUCLEAR REACTIONS 20Ne(3He, t), E=29.7 MeV; measured triton spectra; calculated temperature dependence of stellar 19Ne(p, γ)20Na reaction rate. 20Na deduced levels, Γ. Implanted targets, magnetic spectrograph.

doi: 10.1016/0375-9474(92)90386-X
Citations: PlumX Metrics


1991HO09      Nucl.Phys. A528, 298 (1991)

A.J.Howard, T.S.Moise, A.E.Champagne, P.V.Magnus, M.S.Smith

Measurements of Differential Cross-Section Ratios for Single-Nucleon Transfer Reaction Pairs Near A = 25

NUCLEAR REACTIONS 22Ne, 24,26Mg(3He, d), E=20.2 MeV; measured σ(Ed); 22Ne, 24,26Mg(α, t), E=34.8 MeV; measured σ(Et). 23Na, 25,27Al deduced levels, σ(Ed)/σ(Et). 24Mg(d, p), E=17.5 MeV; measured σ(Ep). 24Mg(α, 3He), E=34.8 MeV; measured σ(E(3He)). 25Mg deduced levels, σ(Ep)/σ(E(3He)).

doi: 10.1016/0375-9474(91)90091-J
Citations: PlumX Metrics


1990CH41      Phys.Rev. C42, 2730 (1990)

A.E.Champagne, A.J.Howard, Z.Q.Mao

22Ne(d, p)23Ne Reaction and Neutron Balance in the s Process

NUCLEAR REACTIONS 22Ne(d, p), E=24.1 MeV; measured σ(θ); deduced (n, γ) mechanism, rate. 23Ne levels deduced spectroscopic factors, Γn.

doi: 10.1103/PhysRevC.42.2730
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0459.


1990MA05      Nucl.Phys. A506, 332 (1990)

P.V.Magnus, M.S.Smith, A.J.Howard, P.D.Parker, A.E.Champagne

Measurement of 15O(α, γ)19Ne Resonance Strengths

NUCLEAR REACTIONS 19F(3He, t), E=29.8 MeV; measured σ(Et), αt-coin. 19Ne levels deduced α-branching ratios. Magnetic spectrograph.

doi: 10.1016/0375-9474(90)90390-8
Citations: PlumX Metrics


1989CH44      Nucl.Phys. A505, 384 (1989)

A.E.Champagne, A.J.Howard, M.S.Smith, P.V.Magnus, P.D.Parker

The Effect of Weak Resonances on the 25Mg(p, γ)26Al Reaction Rate

NUCLEAR REACTIONS, ICPND 25Mg(3He, d), E=20.2 MeV; measured σ(θd); deduced 25Mg(p, γ) reaction rate temperature dependence. 26Al levels deduced S, Γp, resonance strengths. Enriched target.

doi: 10.1016/0375-9474(89)90382-5
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1321.


1989WA19      Nucl.Phys. A499, 546 (1989)

T.F.Wang, A.E.Champagne, J.D.Hadden, P.V.Magnus, M.S.Smith, A.J.Howard, P.D.Parker

Proton Threshold States in 27Si and the Destruction of 26Al at Low Stellar Temperatures

NUCLEAR REACTIONS 27Al(3He, t), E=22.5, 26.3 MeV; measured σ(Et); 28Si(3He, α), E=22.4 MeV; measured σ(θ). 26Mg(3He, d), E=20.2 MeV; measured σ(θ). 26Mg(α, t), E=34.8 MeV; measured σ(Et); deduced 26Al(p, γ)27Si reaction rates. 27Al, 27Si deduced levels. Enriched 26Mg target, magnetic spectrograph.

doi: 10.1016/0375-9474(89)90545-9
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1324.


1986CH09      Nucl.Phys. A451, 498 (1986)

A.E.Champagne, A.B.McDonald, T.F.Wang, A.J.Howard, P.V.Magnus, P.D.Parker

Threshold States in 26Al Revisited

NUCLEAR REACTIONS 27Al(3He, α), 25Mg(3He, d), E=20 MeV; measured σ(E), dγ-coin. 26Al deduced levels, Γp. Enriched target.

doi: 10.1016/0375-9474(86)90073-4
Citations: PlumX Metrics


1984OS03      Nucl.Phys. A419, 115 (1984)

J.L.Osborne, C.A.Barnes, R.W.Kavanagh, R.M.Kremer, G.J.Mathews, J.L.Zyskind, P.D.Parker, A.J.Howard

Low-energy behavior of the 3He(α, γ)7Be cross section

NUCLEAR REACTIONS, ICPND 3He(α, γ), E=165-1169 keV; measured σ(E), Eγ, γ-branching ratio. 3He(α, γ), E(cm)=947, 1255 keV; measured σ(E). Enriched target.

doi: 10.1016/0375-9474(84)90288-4
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0737.


1983CH17      Nucl.Phys. A402, 159 (1983)

A.E.Champagne, A.J.Howard, P.D.Parker

Threshold States in 26Al (I). Experimental Investigations

NUCLEAR REACTIONS 25Mg(3He, d), (3He, 3He), 26Mg(α, α'), E=20 MeV; 25Mg(d, p), E=10 MeV; 27Al(3He, α), E=8.25 MeV; 24Mg(3He, p), E=6.9 MeV; measured σ(θd), σ(θp), σ(E, Eα), σ(θ), αγ-, pγ-coin, Eγ. 26Al, 26,25Mg deduced levels, J, π, L, S. Enriched target.

doi: 10.1016/0375-9474(83)90566-3
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1203.


1983CH18      Nucl.Phys. A402, 179 (1983)

A.E.Champagne, A.J.Howard, P.D.Parker

Threshold States in 26Al: (II). Extraction of Resonance Strengths

NUCLEAR REACTIONS 25Mg(p, γ), E=386-393 keV; measured σ(E). 26Al resonances deduced Γ, resonance strengths. R-matrix analysis.

doi: 10.1016/0375-9474(83)90567-5
Citations: PlumX Metrics


1982OS02      Phys.Rev.Lett. 48, 1664 (1982)

J.L.Osborne, C.A.Barnes, R.W.Kavanagh, R.M.Kremer, G.J.Mathews, J.L.Zyskind, P.D.Parker, A.J.Howard

Low-Energy 3He(α, γ)7Be Cross-Section Measurements

NUCLEAR REACTIONS, ICPND 3He(α, γ), E(cm)=165-1170 keV; measured absolute σ vs E, γ-branching ratio; deduced zero-energy intercept. Activation technique, 3He gas target.

doi: 10.1103/PhysRevLett.48.1664
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA0155.


1975PA08      Nucl.Phys. A250, 309 (1975)

P.D.Parker, A.J.Howard, D.R.Goosman

The 38Ar(p, d)37Ar Reaction

NUCLEAR REACTIONS 38Ar(p, d), E=26 MeV; measured σ(Ed, θ). 37Ar deduced levels, J, π, C2S. DWBA analysis.

doi: 10.1016/0375-9474(75)90261-4
Citations: PlumX Metrics


1974HO39      Astrophys.J. 188, 131 (1974)

A.J.Howard, H.B.Jensen, M.Rios, W.A.Fowler, B.A.Zimmerman

Measurement and Theoretical Analysis of Some Reaction Rates of Interest in Silicon Burning

NUCLEAR REACTIONS 27Al, 35Cl, 46Ti(α, n), 40Ca(α, p), 45Sc(p, n), E(cm) ≈ 4-10 MeV; measured σ. Comparison with model predictions, astrophysical implications discussed.

doi: 10.1086/152694
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC0180.


1973NE12      Nucl.Phys. A210, 60 (1973)

A.V.Nero, A.J.Howard

16O(p, α0)13N Cross-Section Measurements

NUCLEAR REACTIONS 16O(p, α), E(cm)=5.4-9.9 MeV; measured σ(E).

doi: 10.1016/0375-9474(73)90503-4
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1103.


1972HO52      Nuovo Cim. 11A, 575 (1972)

A.J.Howard, R.G.Hirko, D.A.Bromley, K.Bethge, J.W.Olness

A Study of 22Ne via the 20Ne(t, pγ)22Ne Reaction

NUCLEAR REACTIONS 20Ne(t, pγ), E=3 MeV; measured σ(Ep, Eγ, θ(pγ)). 22Ne deduced levels, J, π.

doi: 10.1007/BF02729464
Citations: PlumX Metrics


1972LI02      Nucl.Phys. A180, 1 (1972)

R.A.Lindgren, R.G.Hirko, J.G.Pronko, A.J.Howard, M.W.Sachs, D.A.Bromley

A Study of 23Na

NUCLEAR REACTIONS 23Na(α, α'γ), 26Mg(p, αγ), Eα=16.85 MeV, Ep=14.25 MeV; measured αγ(θ), pγ(θ), Iγ. 23Na levels deduced J, branching, multipole mixing ratios. Enriched 26Mg target.

doi: 10.1016/0375-9474(72)90152-2
Citations: PlumX Metrics


1971CH09      Nucl.Phys. A164, 307 (1971)

J.W.Champlin, A.J.Howard, J.W.Olness

Studies of 37Ar via the 36Ar(d, pγ)37Ar Reaction

NUCLEAR REACTIONS 36Ar(d, pγ), E=2.800, 2.975, 3.100 MeV; measured Eγ, Iγ, pγ(θ). 37Ar deduced levels, γ-branching, J, γ-mixing(E2/M1). Enriched gas target.

doi: 10.1016/0375-9474(71)90216-8
Citations: PlumX Metrics


1971HI05      Particles and Nuclei 1, 372 (1971)

R.G.Hirko, R.A.Lindgren, A.J.Howard, J.G.Pronko, M.W.Sachs, D.A.Bromley

Nuclear Structure Studies on 29Al

NUCLEAR REACTIONS 27Al(t, p), E=3.34 MeV; measured σ(Ep, θ). 26Mg(α, pγ), E=13.82, 14 MeV; measured σ(Ep, Eγ, θ(γ), θ(pγ)). 29Al deduced levels, J, π, γ-mixing, γ-branching.


1971ME12      Phys.Rev. C4, 1778 (1971)

M.C.Mermaz, C.A.Whitten, Jr., J.W.Champlin, A.J.Howard, D.A.Bromley

Study of the (d, p) Reaction on 28Si, 32S, and 36Ar at E = 18.00 MeV

NUCLEAR REACTIONS 28Si, 32S, 36Ar(d, p), E=18 MeV; measured σ(Ep, θ). 29Si, 33S, 37Ar deduced levels, J, π, L(n), S.

doi: 10.1103/PhysRevC.4.1778
Citations: PlumX Metrics


1970HO17      Phys.Rev. C1, 1446 (1970)

A.J.Howard, R.G.Hirko, D.A.Bromley, K.Bethge, J.W.Olness

Studies of the Low-Lying Levels of Ne24

NUCLEAR REACTIONS 22Ne(t, pγ), E=3.3 MeV; measured σ(Ep, Eγ, θ(pγ)). 24Ne levels deduced L, J, π.

doi: 10.1103/PhysRevC.1.1446
Citations: PlumX Metrics


1970HO19      Nucl.Phys. A150, 609 (1970)

A.J.Howard, J.G.Pronko, R.G.Hirko

Studies on the 21Ne(p, d)20Ne and 21Ne(d, p)22Ne Reactions

NUCLEAR REACTIONS 21Ne(p, d), E=20.0 MeV. 21Ne(d, p), E=10.2 MeV; measured σ(Ed, θ), σ(Ep, θ). 20Ne, 22Ne deduced levels, J, π, L(n), S. Enriched gas target.

doi: 10.1016/0375-9474(70)90421-5
Citations: PlumX Metrics


1970HO22      Nucl.Phys. A152, 317 (1970)

A.J.Howard, J.G.Pronko, C.A.Whitten, Jr.

Studies on 21Ne and 23Ne via the 20Ne(d, p)21Ne and 22Ne(d, p)23Ne Reactions

NUCLEAR REACTIONS 20,22Ne(d, p), E=16.4, 12.1 MeV; measured σ(Ep, θ). 21Ne, 23Ne deduced levels, J, π, L(n), S. Enriched gas targets.

doi: 10.1016/0375-9474(70)90833-X
Citations: PlumX Metrics


1970LI08      Phys.Lett. 32B, 103 (1970)

R.A.Lindgren, J.G.Pronko, A.J.Howard, D.A.Bromley

The Identification of Mirror State Structure in 21Na and 21Ne

NUCLEAR REACTIONS 24Mg(p, α); E=17.5 MeV; measured σ(Eα, Ep), αp(θ). 21Na levels deduced J.

doi: 10.1016/0370-2693(70)90598-8
Citations: PlumX Metrics


1969HO26      Phys.Rev. 184, 1094 (1969)

A.J.Howard, J.G.Pronko, C.A.Whitten, Jr.

Low-Lying Negative-Parity States in Ne21

NUCLEAR REACTIONS 20Ne(d, p), E = 16.4 MeV; 22Ne(p, d), E = 20 MeV; measured σ(Ep, θ), σ(Ed, θ). 21Ne deduced levels, L(n), S, J, π.

doi: 10.1103/PhysRev.184.1094
Citations: PlumX Metrics


1968CH42      Bull.Am.Phys.Soc. 13, No.4, 675 HF13 (1968)

J.W.Champlin, A.J.Howard, J.W.Olness

Excitation-Energy Measurements on the Ar37 - K37 Mirror Pair

NUCLEAR REACTIONS 36Ar(d, p), (d, n), E=2.8-3.5 MeV; measured Eγ, Iγ with GeLi detector at 0 deg and 90 deg in 37Ar, 37K.


1967AL02      Phys.Rev. 154, 1058 (1967)

J.P.Allen, A.J.Howard, D.A.Bromley, J.W.Olness, E.K.Warburton

Studies of Ar41 from the Ar40(d, pγ)Ar41 Reaction

NUCLEAR STRUCTURE 41Ar; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.154.1058
Citations: PlumX Metrics


1967HO08      Phys.Rev. 154, 1067 (1967)

A.J.Howard, J.P.Allen, D.A.Bromley, J.W.Olness, E.K.Warburton

Studies on the Ne22(d, pγ)Ne23 Reaction

NUCLEAR STRUCTURE 23Ne; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.154.1067
Citations: PlumX Metrics


1967HO10      Phys.Rev. 157, 1022(1967)

A.J.Howard, J.P.Allen, D.A.Bromley, J.W.Olness, E.K.Warburton

Studies of Some Low-Lying Levels of Ne21

NUCLEAR REACTIONS 20Ne(d, pγ), E= < 4 MeV; measured σ(Ep, Eγ, θ(p), θ(pγ)). 21Ne deduced levels, J, π, branching ratios, γ-multipolarity.

doi: 10.1103/PhysRev.157.1022
Citations: PlumX Metrics


1965AL13      Nucl.Phys. 68, 426 (1965)

J.P.Allen, A.J.Howard, D.A.Bromley, J.W.Olness

The Low Levels of O19

NUCLEAR REACTIONS 18O(d, pγ)19O, E = 2.2, 2.5 MeV; measured γ, pγ-coin, γγ(θ). 19O deduced levels, J, π.

doi: 10.1016/0029-5582(65)90659-0
Citations: PlumX Metrics


1965AL20      Phys.Rev. 140, B1245 (1965)

J.P.Allen, A.J.Howard, D.A.Bromley, J.W.Olness

Studies on F19 in the O18(p, γ)F19 Reaction

NUCLEAR STRUCTURE 18O, 19F; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.140.B1245
Citations: PlumX Metrics


1965HO03      Phys.Rev. 137, B32 (1965)

A.J.Howard, D.A.Bromley, E.K.Warburton

Studies on the Ne20(d, pγ)Ne21 Reaction

NUCLEAR STRUCTURE 21Ne; measured not abstracted; deduced nuclear properties.

doi: 10.1103/PhysRev.137.B32
Citations: PlumX Metrics


1964AL02      Bull. Am. Phys. Soc. 9, No. 1, 68, GC11 (1964)

J.P.Allen, A.J.Howard, D.A.Bromley, J.W.Olness

Character of the 3.91-MeV State in F19

NUCLEAR STRUCTURE 18O; measured not abstracted; deduced nuclear properties.


1964AL06      Bull. Am. Phys. Soc. 9, No. 4, 440, FA12 (1964)

J.P.Allen, A.J.Howard, D.A.Bromley

Studies on the Low-Lying Levels of 37Ar

NUCLEAR STRUCTURE 37Ar; measured not abstracted; deduced nuclear properties.


1964HO01      Bull.Am.Phys.Soc. 9, No.1, 68, GC12 (1964)

A.J.Howard, J.P.Allen, D.A.Bromley, J.W.Olness

2.08-MeV Level in Na23

NUCLEAR STRUCTURE 23Ne; measured not abstracted; deduced nuclear properties.


1964HO04      Bull.Am.Phys.Soc. 9, No.4, 439, FA4 (1964)

A.J.Howard, D.A.Bromley

γ Deexcitation Studies on the Low Levels of 23Ne

NUCLEAR STRUCTURE 23Ne; measured not abstracted; deduced nuclear properties.


1963HO02      Bull.Am.Phys.Soc. 8, No.1, 47, NA1 (1963)

A.J.Howard, D.A.Bromley, E.K.Warburton

γ-De-Excitation Studies on the Low Levels of the Mass-21 System

NUCLEAR STRUCTURE 21Ne, 21Na; measured not abstracted; deduced nuclear properties.


1963HO10      Thesis, Yale University (1963)

A.J.Howard, Jr.

Studies on the Mass 21 System

NUCLEAR STRUCTURE 21Ne, 21Na; measured not abstracted; deduced nuclear properties.


1963MC01      Bull.Am.Phys.Soc. 8, No.1, 47, NA3 (1963)

C.L.McClelland, J.Lowe, A.J.Howard

Lifetime of the 1st-Excited State of Ne23

NUCLEAR STRUCTURE 23Ne; measured not abstracted; deduced nuclear properties.


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