Nuclear Science References (NSR)

NSR Query Results

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NSR database version of April 25, 2024.

Search: Author = J.W.Hammer

Found 51 matches.

2013HA03 Phys.Rev. C 87, 025806 (2013)

S.Harissopulos, A.Spyrou, A.Lagoyannis, M.Axiotis, P.Demetriou, J.W.Hammer, R.Kunz, H.-W.Becker

Cross section measurements of proton capture reactions relevant to the p process: The case of ⁸⁹Y(p, γ)⁹⁰Zr and ^{121, 123}Sb(p, γ)^{122, 124}Te

NUCLEAR REACTIONS ⁸⁹Y, ^121,123Sb(p, γ)⁹⁰Zr/¹²²Te/¹²⁴Te, E=16-3.4 MeV; measured Eγ, Iγ, γ(θ), total σ(E), primary and secondary γ; deduced astrophysical S(E) factors, reaction rates, isomeric cross section ratios. ⁹⁰Zr; deduced levels, J, π. ⁸⁹Y(p, γ)⁹⁰Zr, E=2, 3, 4, 4.8 MeV; measured Eγ, integrated σ(E) by 4π-summing method. Comparison with TALYS code calculations, and with previous studies.

doi: 10.1103/PhysRevC.87.025806
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2010CO12 Phys.Rev. C 82, 035802 (2010)

H.Costantini, R.J.de Boer, R.E.Azuma, M.Couder, J.Gorres, J.W.Hammer, P.J.LeBlanc, H.Y.Lee, S.O'Brien, A.Palumbo, E.C.Simpson, E.Stech, W.Tan, E.Uberseder, M.Wiescher

¹⁶O(α, γ)²⁰Ne S factor: Measurements and R-matrix analysis

NUCLEAR REACTIONS ¹⁶O(α, γ), E=2.5 MeV; measured Eγ, Iγ, γγ-coin, Eα, Iα. ²⁰Ne; deduced levels, J, π, resonances, width, yields, branching ratios, S factors, reaction rates. R-matrix analysis.

doi: 10.1103/PhysRevC.82.035802
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2006AS02 Phys.Rev. C 73, 055801 (2006)

M.Assuncao, M.Fey, A.Lefebvre-Schuhl, J.Kiener, V.Tatischeff, J.W.Hammer, C.Beck, C.Boukari-Pelissie, A.Coc, J.J.Correia, S.Courtin, F.Fleurot, E.Galanopoulos, C.Grama, F.Haas, F.Hammache, F.Hannachi, S.Harissopulos, A.Korichi, R.Kunz, D.LeDu, A.Lopez-Martens, D.Malcherek, R.Meunier, Th.Paradellis, M.Rousseau, N.Rowley, G.Staudt, S.Szilner, J.P.Thibaud, J.L.Weil

E1 and E2 S factors of ¹²C(α, γ₀)¹⁶0 from γ-ray angular distributions with a 4π-detector array

NUCLEAR REACTIONS ¹²C(α, γ), E(cm)=1.30-2.78 MeV; measured Eγ, Iγ(θ); deduced E1 and E2 astrophysical S-factors.

doi: 10.1103/PhysRevC.73.055801
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2005HA16 Nucl.Phys. A752, 514c (2005)

J.W.Hammer, M.Fey, R.Kunz, J.Kiener, V.Tatischeff, F.Haas, J.L.Weil, M.Assuncao, C.Beck, C.Boukari-Pelissie, A.Coc, J.J.Correia, S.Courtin, F.Fleurot, E.Galanopoulos, C.Grama, F.Hammache, S.Harissopulos, A.Korichi, E.Krmpotic, D.Le Du, A.Lopez-Martens, D.Malcherek, R.Meunier, P.Papka, T.Paradellis, M.Rousseau, N.Rowley, G.Staudt, S.Szilner

New determination of the ¹²C(α, γ)¹⁶O reaction rate from γ-ray angular distribution measurements

NUCLEAR REACTIONS ¹²C(α, γ), E(cm)=0.89-2.8 MeV; measured σ(θ), S-factors; deduced astrophysical reaction rate.

doi: 10.1016/j.nuclphysa.2005.02.056
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2005HA48 Nucl.Phys. A758, 363c (2005)

E1 and E2 capture cross section and astrophysical reaction rate of the key reaction ¹²C(α, γ)¹⁶O

NUCLEAR REACTIONS ¹²C(α, γ), E(cm)=0.89-2.8 MeV; measured Eγ, Iγ, angular distributions; deduced S-factors for E1 and E2 capture. Eurogam and Gandi arrays, astrophysical implications discussed.

doi: 10.1016/j.nuclphysa.2005.05.066
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2005HA49 Nucl.Phys. A758, 505c (2005)

S.Harissopulos, A.Spyrou, A.Lagoyannis, Ch.Zarkadas, H.-W.Becker, C.Rolfs, F.Strieder, J.W.Hammer, A.Dewald, K.-O.Zell, P.von Brentano, R.Julin, P.Demetriou, S.Goriely

Systematic measurements of proton- and alpha-capture cross sections relevant to the modelling of the p process

NUCLEAR REACTIONS ⁹²Mo(α, γ), E=9 MeV; ⁹¹Zr(α, γ), E=10.5 MeV; ¹¹⁸Sn(α, γ), E=11.5 MeV; measured Eγ, Iγ. ⁹¹Zr, ¹¹⁸Sn(α, γ), E(cm) ≈ 9-11 MeV; measured σ. Comparison with model predictions.

doi: 10.1016/j.nuclphysa.2005.05.092
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2005HA56 J.Phys.(London) G31, S1417 (2005)

S.Harissopulos, A.Lagoyannis, A.Spyrou, Ch.Zarkadas, S.Galanopoulos, G.Perdikakis, H.-W.Becker, C.Rolfs, F.Strieder, R.Kunz, M.Fey, J.W.Hammer, A.Dewald, K.-O.Zell, P.von Brentano, R.Julin, P.Demetriou

Proton and alpha-particle capture reactions at sub-Coulomb energies relevant to the p process

NUCLEAR REACTIONS ¹⁰⁴Pd(p, γ), E(cm)=2-8 MeV; ¹¹⁸Sn(α, γ), E(cm)=10-11 MeV; measured Eγ, Iγ, σ. Comparison with model predictions.

doi: 10.1088/0954-3899/31/10/006
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2005HA69 Phys.Rev. C 72, 062801 (2005)

S.Harissopulos, H.W.Becker, J.W.Hammer, A.Lagoyannis, C.Rolfs, F.Strieder

Cross section of the ¹³C(α, n)¹⁶O reaction: A background for the measurement of geo-neutrinos

NUCLEAR REACTIONS ¹³C(α, n), E=0.8-8.0 MeV; measured σ, neutron yields.

doi: 10.1103/PhysRevC.72.062801
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2003FE04 Nucl.Phys. A718, 131c (2003)

M.Fey, R.Kunz, J.W.Hammer, M.Jaeger, A.Mayer, E.Krmpotic, C.Bauer, C.Meyer, S.Harissopulos, T.Paradellis, G.Staudt, F.Haas, P.Papka, K.-L.Kratz, B.Pfeiffer

The Key Reactions in Stellar Helium Burning: ¹²C(α, γ)¹⁶O and ²²Ne(α, n)²⁵Mg

NUCLEAR REACTIONS ¹²C(α, γ), E ≈ 1-2.8 MeV; measured Eγ, Iγ(θ); deduced S-factor components. ²²Ne(α, n), E=0.57-1.47 MeV; measured excitation function.

doi: 10.1016/S0375-9474(03)00690-0
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2003GA01 Phys.Rev. C 67, 015801 (2003)

S.Galanopoulos, P.Demetriou, M.Kokkoris, S.Harissopulos, R.Kunz, M.Fey, J.W.Hammer, Gy.Gyurky, Zs.Fulop, E.Somorjai, S.Goriely

The ⁸⁸Sr(p, γ)⁸⁹Y reaction at astrophysically relevant energies

NUCLEAR REACTIONS ⁸⁸Sr(p, γ), E=1.4-5 MeV; measured Eγ, Iγ, angular distributions, total σ; deduced astrophysical S-factors, reaction rates. Comparison with model predictions.

doi: 10.1103/PhysRevC.67.015801
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2003HA32 Nucl.Phys. A719, 115c (2003)

S.Harissopulos, S.Galanopoulos, P.Demetriou, A.Spyrou, G.Kriembardis, M.Kokkoris, A.G.Karydas, Ch.Zarkadas, R.Kunz, M.Fey, J.W.Hammer, G.Gyurky, Zs.Fulop, E.Somorjai, A.Dewald, K.O.Zell, P.von Brentano, R.Julin, S.Goriely

A systematic study of proton capture reactions in the Se-Sb region at energies relevant to the p process

NUCLEAR REACTIONS ⁸⁰Se, ⁸⁶Sr, ⁹³Nb, ¹⁰³Rh(p, γ), E(cm) ≈ 1.5-4.5 MeV; measured Eγ, σ; deduced astrophysical S-factors.

doi: 10.1016/S0375-9474(03)00978-3
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2002KU16 Astrophys.J. 567, 643 (2002)

R.Kunz, M.Fey, M.Jaeger, A.Mayer, J.W.Hammer, G.Staudt, S.Harissopulos, T.Paradellis

Astrophysical Reaction Rate of ¹²C(α, γ)¹⁶O

NUCLEAR REACTIONS ¹²C(α, γ), E(cm) < 10 MeV; calculated S-factors, astrophysical reaction rates.

doi: 10.1086/338384
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2002WI18 Phys.Rev. C 66, 065802 (2002)

S.Wilmes, V.Wilmes, G.Staudt, P.Mohr, J.W.Hammer

The ¹⁵N(α, γ)¹⁹F reaction and nucleosynthesis of ¹⁹F

NUCLEAR REACTIONS ¹⁵N(α, γ), E=461-2642 keV; measured Eγ, Iγ; deduced resonance energies, strengths, widths, and branching ratios, astrophysical reaction rates. ¹⁹F deduced levels.

doi: 10.1103/PhysRevC.66.065802
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2001HA31 Prog.Part.Nucl.Phys. 46, 43 (2001)

J.W.Hammer

Key Reactions in the Helium Burning Phase of Stars

NUCLEAR REACTIONS ¹²C(α, γ), E(cm)=0.95-2.78 MeV; measured σ(θ); deduced S-factors. ²²Ne(α, n), E=570-1400 keV; measured σ; deduced resonance parameters.

doi: 10.1016/S0146-6410(01)00106-5
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2001HA38 Nucl.Phys. A688, 421c (2001)

S.Harissopulos, S.Galanopoulos, P.Tsagari, P.Demetriou, G.Kuburas, T.Paradellis, R.Kunz, J.W.Hammer, G.Gyurky, E.Somorjai, S.Goriely, S.Kasemann, A.Dewald, K.O.Zell

Cross Sections of (p, γ) Reactions of N = 50 Nuclei Relevant to p-Process

NUCLEAR REACTIONS ⁸⁸Sr, ⁸⁹Y(p, γ), E=1.5-3.5 MeV; measured Eγ, σ. Comparison with Statistical Model calculations and with neighboring nuclei.

doi: 10.1016/S0375-9474(01)00743-6
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2001HA60 Phys.Rev. C64, 055804 (2001)

S.Harissopulos, E.Skreti, P.Tsagari, G.Souliotis, P.Demetriou, T.Paradellis, J.W.Hammer, R.Kunz, C.Angulo, S.Goriely, T.Rauscher

Cross Section Measurements of the ⁹³Nb(p, γ)⁹⁴Mo Reaction at E_p = 1.4-4.9 MeV Relevant to the Nucleosynthetic p Process

NUCLEAR REACTIONS ⁹³Nb(p, γ), E=1.4-4.9 MeV; measured Eγ, Iγ, total σ; deduced astrophysical reaction rates. Comparison with model predictions.

doi: 10.1103/PhysRevC.64.055804
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2001JA15 Phys.Rev.Lett. 87, 202501 (2001)

M.Jaeger, R.Kunz, A.Mayer, J.W.Hammer, G.Staudt, K.L.Kratz, B.Pfeiffer

²²Ne(α, n)²⁵Mg: The key neutron source in massive stars

NUCLEAR REACTIONS ²²Ne(α, n), E=570-1450 keV; measured σ; deduced resonance parameters, astrophysical reaction rates.

doi: 10.1103/PhysRevLett.87.202501
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2001KU09 Phys.Rev.Lett. 86, 3244 (2001)

R.Kunz, M.Jaeger, A.Mayer, J.W.Hammer, G.Staudt, S.Harissopulos, T.Paradellis

¹²C(α, γ)¹⁶O: The key reaction in stellar nucleosynthesis

NUCLEAR REACTIONS ¹²C(α, γ), E(cm)=0.95-2.8 MeV; measured Eγ, Iγ(θ); deduced astrophysical S-factors.

doi: 10.1103/PhysRevLett.86.3244
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2000JA08 Trans.Bulg.Nucl.Soc. 5, 183 (2000)

M.Jaeger, R.Kunz, I.Busching, A.Mayer, J.W.Hammer

The Reaction ²²Ne(α, n)²⁵Mg as a Neutron Source for the Astrophysical s-Process

NUCLEAR REACTIONS ²²Ne(α, n), E=0.59-1.5 MeV; measured σ, resonance features.

2000TS05 Trans.Bulg.Nucl.Soc. 5, 195 (2000)

P.Tsagari, E.Skreti, G.A.Souliotis, P.Demetriou, S.Harissopulos, T.Paradellis, J.W.Hammer, R.Kunz, C.Angulo, S.Goriely, T.Rauscher

Cross Section Measurements of the ⁸⁹Y(p, γ)⁹⁰Zr Reaction in the Energy Range E_p = 1.6-2.4 MeV

NUCLEAR REACTIONS ⁸⁹Y(p, γ), E=1.6-2.4 MeV; measured Eγ, Iγ, total σ. ⁹⁰Zr deduced levels, J, π. Comparison with statistical model.

1999AN35 Nucl.Phys. A656, 3 (1999)

C.Angulo, M.Arnould, M.Rayet, P.Descouvemont, D.Baye, C.Leclercq-Willain, A.Coc, S.Barhoumi, P.Aguer, C.Rolfs, R.Kunz, J.W.Hammer, A.Mayer, T.Paradellis, S.Kossionides, C.Chronidou, K.Spyrou, S.Degl'Innocenti, G.Fiorentini, B.Ricci, S.Zavatarelli, C.Providencia, H.Wolters, J.Soares, C.Grama, J.Rahighi, A.Shotter, M.Lamehi-Rachti

A Compilation of Charged-Particle Induced Thermonuclear Reaction Rates

COMPILATION ¹H(p, e⁺ν), ²H, ^6,7Li, ^7,9Be, ^10,11B, ^12,13C, ^13,14,15N, ^16,17,18O, ¹⁹F, ^20,21,22Ne, ^22,23Na, ^24,25,26Mg, ^26,27Al, ²⁸Si(p, γ), ²H(d, γ), (d, p), ^2,3H(d, n), ^2,3H, ³He, ⁷Li, ⁷Be, ¹²C, ^14,15N, ^16,18O, ^20,22Ne(α, γ), ³He(³He, 2p), ^6,7Li, ⁹Be, ^10,11B, ^14,15N, ^17,18O, ¹⁹F, ²⁰Ne, ²³Na, ²⁴Mg, ²⁷Al(p, α), ⁷Li, ⁹Be, ¹³C, ¹⁴N, ^17,18O, ^21,22Ne, ²³Na, ^25,26Mg, ²⁷Al(α, n), ⁹Be, ¹¹B, ¹³C, ^14,15N, ¹⁹F, ²³Na(p, n), ⁹Be(p, d), E < 10 MeV; compiled, analyzed σ, S-factors; calculated astrophysical reaction rates vs T₉. Analytical approximations.

doi: 10.1016/S0375-9474(99)00030-5
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1999KO34 Nucl.Instrum.Methods Phys.Res. A431, 160 (1999)

V.Kolle, U.Kolle, S.E.Braitmayer, P.Mohr, S.Wilmes, G.Staudt, J.W.Hammer, M.Jaeger, H.Knee, R.Kunz, A.Mayer

Capture Reactions at Astrophysically Relevant Energies: Extended gas target experiments and GEANT simulations

NUCLEAR REACTIONS ²⁰Ne(α, γ), E=0.45-3.50 MeV; measured Eγ, Iγ, yield curves; deduced resonant capture features, gas target density effects. GEANT simulations.

doi: 10.1016/S0168-9002(99)00247-8
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1998BU13 Phys.Rev. C58, R10 (1998)

Y.M.Butt, J.W.Hammer, M.Jaeger, R.Kunz, A.Mayer, P.D.Parker, R.Schreiter, G.Staudt

Measurement of the Properties of the Astrophysically Interesting 3/2⁺ State at 7.101 MeV in ¹⁹F

NUCLEAR REACTIONS ¹⁵N(α, γ), E=2.60-3.93 MeV; measured Eγ, Iγ. ¹⁹F deduced resonance E, Γ, ωγ. Astrophysical implications.

doi: 10.1103/PhysRevC.58.R10
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1997KU18 Nucl.Phys. A621, 149c (1997)

R.Kunz, A.Mayer, K.-D.Joos, H.Knee, A.Muller, J.Nickel, Ch.Plettner, J.W.Hammer, D.Baye, P.Descouvemont, M.Jaeger, V.Kolle, S.Wilmes, G.Staudt, P.Mohr, Ch.Chronidou, S.Harissopulos, K.Spyrou, Th.Paradellis

Capture Reactions in the Helium Burning of Stars

NUCLEAR REACTIONS, ICPND ¹²C(α, γ), E(cm)=0.9-3 MeV; measured Iγ(θ), preliminary results; analyzed astrophysical S-factors vs E, reaction rates vs T₉. ¹⁶O(α, γ), E not given; analyzed Eγ, Iγ. Astrophysical implications.

doi: 10.1016/S0375-9474(97)00228-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF0808.

1997MO27 Phys.Rev.Lett. 79, 3837 (1997)

R.Morlock, R.Kunz, A.Mayer, M.Jaeger, A.Muller, J.W.Hammer, P.Mohr, H.Oberhummer, G.Staudt, V.Kolle

Halo Properties of the First (1/2)⁺ State in ¹⁷F from the ¹⁶O(p, γ)¹⁷F Reaction

NUCLEAR REACTIONS, ICPND ¹⁶O(p, p), (p, γ), E(cm)=200-3750 keV; measured Eγ, Iγ, elastic, capture σ(E). ¹⁷F deduced halo state properties. Direct capture model.

doi: 10.1103/PhysRevLett.79.3837
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1997WI12 Nucl.Phys. A621, 145c (1997)

S.Wilmes, V.Kolle, U.Kolle, G.Staudt, P.Mohr, J.W.Hammer, A.Mayer

The Capture Reactions ¹⁵N(α, γ)¹⁹F and ²⁰Ne(α, γ)²⁴Mg at Astrophysically Relevant Energies

NUCLEAR REACTIONS ¹⁵N(α, γ), E=0.65-2.65 MeV; measured Eγ, Iγ; deduced resonance strengths. ²⁰Ne(α, γ), E=1.64-2.65 MeV; measured Eγ, Iγ; deduced primary transitions yield vs E.

doi: 10.1016/S0375-9474(97)00227-3
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1996KU07 Phys.Rev. C53, 2486 (1996)

R.Kunz, S.Barth, A.Denker, H.W.Drotleff, J.W.Hammer, H.Knee, A.Mayer

Determination of the ⁹Be(α, n)¹²C Reaction Rate

NUCLEAR REACTIONS, ICPND ⁹Be(α, n), E=0.5-3.5 MeV; measured yield, σ(E); deduced astrophysical S-factor vs E, reaction rate. ¹³C deduced resonances, Γ.

doi: 10.1103/PhysRevC.53.2486
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1995WI26 Phys.Rev. C52, R2823 (1995)

S.Wilmes, P.Mohr, U.Atzrott, V.Kolle, G.Staudt, A.Mayer, J.W.Hammer

Low Energy Resonances in ¹⁵N(α, γ)¹⁹F and ¹⁵O(α, γ)¹⁹Ne

NUCLEAR REACTIONS ¹⁵N(α, γ), E=0.67-0.69 MeV; measured Eγ, Iγ; deduced resonance strength. ¹⁹Ne, ¹⁹F deduced resonance parameters. Gas target, hyperpure Ge detector. Realistic folding potential model. Other data input.

doi: 10.1103/PhysRevC.52.R2823
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1994MO17 Phys.Rev. C50, 1543 (1994)

P.Mohr, V.Kolle, S.Wilmes, U.Atzrott, G.Staudt, J.W.Hammer, H.Krauss, H.Oberhummer

Direct Capture in the 3⁺ Resonance of ²H(α, γ)⁶Li

NUCLEAR REACTIONS, ICPND ²H(α, γ), E=2-2.5 MeV; measured Eγ, Iγ; deduced σ(E), folding potential parameters.

doi: 10.1103/PhysRevC.50.1543
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1993DR08 Astrophys.J. 414, 735 (1993)

H.W.Drotleff, A.Denker, H.Knee, M.Soine, G.Wolf, J.W.Hammer, U.Greife, C.Rolfs, H.P.Trautvetter

Reaction Rates of the s-Process Neutron Sources ²²Ne(α, n)²⁵Mg and ¹³C(α, n)¹⁶O

NUCLEAR REACTIONS, ICPND ¹³C(α, n), E(cm) ≈ 275-1075 keV; ²²Ne(α, n), E=0.57-2.3 MeV; measured σ(E); deduced astrophysical S-factor, reaction rates at helium burning temperatures.

doi: 10.1086/173119
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1993MO11 Phys.Rev. C48, 1420 (1993)

P.Mohr, H.Abele, R.Zwiebel, G.Staudt, H.Krauss, H.Oberhummer, A.Denker, J.W.Hammer, G.Wolf

Alpha Scattering and Capture Reactions in the A = 7 System at Low Energies

NUCLEAR REACTIONS, ICPND ⁴He(³He, ³He), E=1.2-3 MeV; measured σ(θ). ⁴He(³He, ³He), (t, t), E ≤ 10 MeV; analyzed phase shifts data. ³H, ³He(α, γ), E(cm) ≤ 1 MeV; calculated astrophysical S-factor vs E; deduced multipole contributions.

doi: 10.1103/PhysRevC.48.1420
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1991DR01 Z.Phys. A338, 367 (1991)

H.W.Drotleff, A.Denker, J.W.Hammer, H.Knee, S.Kuchler, D.Streit, C.Rolfs, H.P.Trautvetter

New ²²Ne(α, n)²⁵Mg-Resonances at Very Low Energies Relevant for the Astrophysical s-Process

NUCLEAR REACTIONS, ICPND ²²Ne(α, n), E ≈ 550-2100 keV; measured σ(E); deduced resonance structure relevant to s-process. Windowless gas target system, 4π neutron detector.

doi: 10.1007/BF01288203
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1990WE10 Nucl.Instrum.Methods Phys.Res. A292, 359 (1990)

W.Weiss, W.Grum, J.W.Hammer, M.Koch, G.Schreder

Polarization Measurement of Fast Neutrons from the ⁹Be(α, n)¹²C and the ¹³C(α, n)¹⁶O Reaction using a High-Pressure ⁴He-Polarimeter in a New Design

NUCLEAR REACTIONS ⁹Be(α, n), E=1.9-3.1 MeV; ¹³C(α, n), E=2.406-3.308 MeV; measured σ(θ), polarization. New design high pressure ⁴He-polarimeter.

doi: 10.1016/0168-9002(90)90392-J
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1989DA07 Phys.Rev. C39, 1768 (1989)

G.Dagge, W.Grum, J.W.Hammer, K.-W.Hoffmann, G.Schreder

Optical Model Analysis of Polarized Neutron Scattering from Aluminum, Copper, and Chromium

NUCLEAR REACTIONS ²⁷Al(polarized n, n), (polarized n, n'), E=7.62 MeV; Cr, Cu(polarized n, n), (polarized n, n'), E=7.75 MeV; measured σ(θ), analyzing power vs θ; deduced optical model parameters, spin orbit parameters. Coupled channels, optical model, weak-coupling model analyses.

doi: 10.1103/PhysRevC.39.1768
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1989SC07 Phys.Rev. C39, 1774 (1989)

G.Schreder, W.Grum, J.W.Hammer, K.-W.Hoffmann, G.Schleussner

Optical Model Analysis of Polarized Neutron Scattering from Yttrium, Lanthanum, and Thulium

NUCLEAR REACTIONS ⁸⁹Y, ¹³⁹La, ¹⁶⁹Tm(polarized n, n), E=7.75 MeV; measured σ(θ), analyzing power vs θ; deduced optical model parameters, spin-orbit parameters.

doi: 10.1103/PhysRevC.39.1774
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset22121.

1989WO09 Z.Phys. A334, 491 (1989)

K.Wolke, V.Harms, H.W.Becker, J.W.Hammer, K.L.Kratz, C.Rolfs, U.Schroder, H.P.Trautvetter, M.Wiescher, A.Wohr

Helium Buring of ²²Ne

NUCLEAR REACTIONS, ICPND ²²Ne(α, γ), (α, nγ), E=0.71-2.25 MeV; measured σ(Eγ, E), γ yields, σ(En); deduced reaction rates. ²⁶Mg deduced resonances, γ-branching ratios, J, π, transition strengths. Enriched gas target.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO1122.

1988HI06 Z.Phys. A329, 243 (1988)

M.Hilgemeier, H.W.Becker, C.Rolfs, H.P.Trautvetter, J.W.Hammer

Absolute Cross Section of the ³He(α, γ)⁷Be Reaction

NUCLEAR REACTIONS, ICPND ³He(α, γ), E(cm)=195-686 keV; measured σ(E); deduced astrophysical S(E) factor. Windowless gas targets, beam calorimeter, Ge detectors.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA1289.

1987RE02 Nucl.Phys. A462, 385 (1987)

A.Redder, H.W.Becker, C.Rolfs, H.P.Trautvetter, T.R.Donoghue, T.C.Rinckel, J.W.Hammer, K.Langanke

The ¹²C(α, γ)¹⁶O Cross Section at Stellar Energies

NUCLEAR REACTIONS, ICPND ¹²C(α, γ), E=0.94-2.84 MeV; measured Eγ, Iγ, σ(E), σ(E, E(γ), θ); deduced astrophysical S-factor. Implanted ¹²C targets, NaI(Tl), Ge detectors.

doi: 10.1016/0375-9474(87)90555-0
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF0580.

1986HA25 Nucl.Instrum.Methods Phys.Res. A244, 455 (1986)

J.W.Hammer, G.Bulski, W.Grum, W.Kratschmer, H.Postner, G.Schleussner

SCORPION, The Stuttgart Scattering Facility for Fast Polarized Neutrons

NUCLEAR REACTIONS ¹²C(n, n), (polarized n, n), E=7.55-8.8 MeV; measured σ(θ), analyzing power vs θ.

doi: 10.1016/0168-9002(86)91069-7
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23737.

1985RE09 Phys.Rev.Lett. 55, 1262 (1985)

A.Redder, H.W.Becker, J.Gorres, M.Hilgemeier, A.Krauss, C.Rolfs, U.Schroder, H.P.Trautvetter, K.Wolke, T.R.Donoghue, T.C.Rinckel, J.W.Hammer

Capture Amplitudes in the Reaction ¹²C(α, γ)¹⁶O at Stellar Energies

NUCLEAR REACTIONS ¹²C(α, γ), E(cm)=1.7-2.8 MeV; measured Eγ, Iγ, γ(θ); deduced nonnegligible E2 contribution to reaction rate at stellar energies, capture σ(E1)/σ(E2).

doi: 10.1103/PhysRevLett.55.1262
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1983GO21 Nucl.Phys. A408, 372 (1983)

J.Gorres, H.W.Becker, L.Buchmann, C.Rolfs, P.Schmalbrock, H.P.Trautvetter, A.Vlieks, J.W.Hammer, T.R.Donoghue

Proton-Induced Direct Capture on ²¹Ne and ²²Ne

NUCLEAR REACTIONS, ICPND ²²Ne(p, p), E=0.6-1.6 MeV; measured σ(θ=145°)/σ(Rutherford) vs E. ^21,22Ne(p, γ), E=0.3-1.6 MeV; measured Eγ, Iγ, σ(E, θγ); deduced direct capture σ, astrophysical reaction rates. ²²Na resonances deduced γ transition strength. ²³Na levels deduced spectroscopic factors, γ transition strength. Extended quasipoint jet gas targets, Ge(Li) detectors.

doi: 10.1016/0375-9474(83)90588-2
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1983SC17 Nucl.Phys. A398, 279 (1983)

P.Schmalbrock, H.W.Becker, L.Buchmann, J.Gorres, K.U.Kettner, W.E.Kieser, H.Krawinkel, C.Rolfs, H.P.Trautvetter, J.W.Hammer, R.E.Azuma

Stellar Reaction Rate of ²⁰Ne(α, γ)²⁴Mg

NUCLEAR REACTIONS, ICPND ²⁰Ne(α, γ), E=0.55-3.2 MeV; measured Eγ, Iγ(E, θ); deduced astrophysical reaction rate, S-factor of capture σ. ²⁴Mg deduced levels, absolute γ-transition strengths, Γ, J, π, T, δ, γ-branching ratios. Windowless gas targets of the extended and jet type, enriched ²⁰Ne gas, Ge(Li) detectors.

doi: 10.1016/0375-9474(83)90488-8
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF0513.

1982KR05 Z.Phys. A304, 307 (1982)

H.Krawinkel, H.W.Becker, L.Buchmann, J.Gorres, K.U.Kettner, W.E.Kieser, R.Santo, P.Schmalbrock, H.P.Trautvetter, A.Vlieks, C.Rolfs, J.W.Hammer, R.E.Azuma, W.S.Rodney

The ³He(α, γ)⁷Be Reaction and the Solar Neutrino Problem

NUCLEAR REACTIONS ³He(α, γ), E(cm)=107-1266 keV; measured σ(E, Eγ, θγ), σ(absolute). ³He(α, α), E=0.2-3 MeV; measured yield vs E; deduced astrophysical S-factor vs E. Ge(Li) detectors, extended, quasipoint jet gas targets.

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetA1205.

1980WI17 Nucl.Phys. A349, 165 (1980)

M.Wiescher, H.W.Becker, J.Gorres, K.-U.Kettner, H.P.Trautvetter, W.E.Kieser, C.Rolfs, R.E.Azuma, K.P.Jackson, J.W.Hammer

Nuclear and Astrophysical Aspects of ¹⁸O(p, γ)¹⁹F

NUCLEAR REACTIONS ¹⁸O(p, γ), E=80-2200 keV; measured Ep, Eγ, Iγ(E, θ). ¹⁹F deduced levels, absolute γ-transition strength, Γ, J, π, δ, γ-branching ratios, S, astrophysical reaction rate. Enriched target, Ge(Li) detectors.

doi: 10.1016/0375-9474(80)90451-0
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1916.

1978TR05 Nucl.Phys. A297, 489 (1978)

H.P.Trautvetter, M.Wiescher, K.-U.Kettner, C.Rolfs, J.W.Hammer

Helium Burning of ¹⁸O

NUCLEAR REACTIONS ¹⁸O(α, γ), E=0.6-2.3 MeV; measured Eγ, Iγ, Iγ(θ), Iγ(E); deduced astrophysical reaction rate. ²²Ne deduced resonances, resonance strength, Γ, J, π, δ, γ-ray branching ratios. Enriched ¹⁸O targets. Ge(Li) detector.

doi: 10.1016/0375-9474(78)90156-2
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1976HA36 Z.Phys. A278, 183 (1976)

W.Hartl, J.W.Hammer

Die K-Elektroneneinfangwahrscheinlichkeit P(k) beim Zerfall von ¹³⁹Ce

RADIOACTIVITY ¹³⁹Ce; measured K-shell EC probability.

doi: 10.1007/BF01437774
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1976HA61 Z.Phys. A279, 135 (1976)

W.Hartl, J.W.Hammer

The K-Fluorescence Yield of Germanium

RADIOACTIVITY ⁷⁴As; measured γγ-coin, T_1/2, K X-rays; deduced EC, β-branching. ⁷⁴Ge deduced K-fluorescence yield P(K)w(K).

doi: 10.1007/BF01437868
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1975AL23 Z.Phys. A273, 405 (1975)

G.Albrecht, J.W.Hammer

Die K-Fluoreszenzausbeute von Titan und der Zerfall des ⁴⁸Vanadium

RADIOACTIVITY ⁴⁸V; measured T_1/2, I X-ray, Iγ, γ(X-ray)-coin; deduced branching. ⁴⁸Ti deduced K-fluorescence yield.

doi: 10.1007/BF01435584
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1971GE10 Z.Phys. 246, 376 (1971)

V.Gehrling, J.W.Hammer, K.-W.Hoffmann

Der Zerfall des ⁸⁴Rb und die Fluoreszenzausbeute von Krypton

RADIOACTIVITY ⁸⁴Rb; measured T_1/2, Eγ, Iγ, Xγ-coin, γγγ-triple coin; deduced branching ratios. Kr deduced K-shell fluorescence yield.

doi: 10.1007/BF02115802
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1969GR12 Z.Physik 225, 293 (1969)

H.-H.Grotheer, J.W.Hammer, K.-W.Hoffmann

Experimentelle Untersuchungen am Elektroneneinfang des ⁸⁵Strontium und ⁸⁸Yttrium

RADIOACTIVITY ⁸⁵Sr; measured X(K)γ-coin; deduced K-capture rate. ⁸⁵Rb level deduced T_1/2. ⁸⁸Y; measured X(K)γ-coin; deduced EC/β+ branching ratio.

ATOMIC PHYSICS Rb, Sr; deduced K-fluorescence yield.

doi: 10.1007/BF01395011
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1968HA47 Z.Physik 216, 355 (1968)

J.W.Hammer

Experimentelle Untersuchungen am Elektroneneinfang des Mangan 54 und Zink 65

RADIOACTIVITY ⁵⁴Mn, ⁶⁵Zn; measured T_1/2, Eγ, Xγ-coin; deduced electron subshell capture rates, γ/β. Ge(Li) detector.

doi: 10.1007/BF01391530
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