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NSR database version of April 11, 2024.

Search: Author = J.Stevens

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2021GA33      Eur.Phys.J. A 57, 342 (2021)

C.A.Gayoso, L.Bibrzycki, S.Diehl, S.Heppelmann, D.W.Higinbotham, G.M.Huber, S.J.D.Kay, S.R.Klein, J.M.Laget, W.B.Li, V.Mathieu, K.Park, R.J.Perry, B.Pire, K.Semenov-Tian-Shansky, A.Stanek, J.R.Stevens, L.Szymanowski, C.Weiss, B.-G.Yu

Progress and opportunities in backward angle (u-channel) physics

doi: 10.1140/epja/s10050-021-00625-2
Citations: PlumX Metrics

2020ME06      Phys.Rev. C 101, 052801 (2020)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Nuclear mass measurements map the structure of atomic nuclei and accreting neutron stars

ATOMIC MASSES ^48,49Ar, ^{52,53,54,55,56,57}Sc, ^56,57,58,59Ti, ^{57,58,59,60,61,62}V, ^64,65Cr, ^67,68Mn, ^67,68,69,70Fe; measured time of flight, ΔE, Bπ, and mass excess using the A1900 fragment separator and the S800 spectrograph for particle identification at the NSCL-MSU facility; deduced S(2n), and D_n(Z, A)=S(n)(Z, A+1)-S(n)(Z, A), related to pairing gap. Comparison with available evaluated data in AME2016, and with shell model calculations using GX1A Hamiltonian for Sc isotopes. Discussion of upper-Z limit for N=34 subshell closure and lower-Z limit for N=40 subshell, and impact on electron-capture cooling in neutron star crusts. Isotopes produced in ⁹Be(⁸²Se, X), E=140 MeV/nucleon reaction.

doi: 10.1103/PhysRevC.101.052801
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2017KA25      Phys.Lett. B 769, 549 (2017)

A.Kankainen, P.J.Woods, H.Schatz, T.Poxon-Pearson, D.T.Doherty, V.Bader, T.Baugher, D.Bazin, B.A.Brown, J.Browne, A.Estrade, A.Gade, J.Jose, A.Kontos, C.Langer, G.Lotay, Z.Meisel, F.Montes, S.Noji, F.Nunes, G.Perdikakis, J.Pereira, F.Recchia, T.Redpath, R.Stroberg, M.Scott, D.Seweryniak, J.Stevens, D.Weisshaar, K.Wimmer, R.Zegers

Measurement of key resonance states for the ³⁰P(p, γ)³¹S reaction rate, and the production of intermediate-mass elements in nova explosions

NUCLEAR REACTIONS ²H(³⁰P, n)³¹S, E=30 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced γ-ray energies and relative intensities, σ, negative-parity states, spectroscopic factors, resonance parameters, astrophysical reaction rates. The GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array), the National Superconducting Cyclotron Laboratory, Michigan State University.

doi: 10.1016/j.physletb.2017.01.084
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2267. Data from this article have been entered in the XUNDL database. For more information, click here.

2017ON01      Phys.Rev. C 95, 055806 (2017)

W.-J.Ong, C.Langer, F.Montes, A.Aprahamian, D.W.Bardayan, D.Bazin, B.A.Brown, J.Browne, H.Crawford, R.Cyburt, E.B.Deleeuw, C.Domingo-Pardo, A.Gade, S.George, P.Hosmer, L.Keek, A.Kontos, I.-Y.Lee, A.Lemasson, E.Lunderberg, Y.Maeda, M.Matos, Z.Meisel, S.Noji, F.M.Nunes, A.Nystrom, G.Perdikakis, J.Pereira, S.J.Quinn, F.Recchia, H.Schatz, M.Scott, K.Siegl, A.Simon, M.Smith, A.Spyrou, J.Stevens, S.R.Stroberg, D.Weisshaar, J.Wheeler, K.Wimmer, R.G.T.Zegers

Low-lying level structure of ⁵⁶Cu and its implications for the rp process

NUCLEAR REACTIONS ²H(⁵⁶Ni, ⁵⁶Cu), E AP 75 MeV/nucleon, [secondary ⁵⁶Ni beam from ⁹Be(⁵⁸Ni, X), E=160 MeV/nucleon primary reaction using A1900 separator at NSCL-MSU facility]; measured ΔE-TOF particle identification for ions, Eγ, Iγ, γγ-, (⁵⁶Cu ions)γ-coin using GRETINA array and S800 magnetic spectrograph. ⁵⁶Cu; deduced levels, J, π. Comparison with mirror nucleus ⁵⁶Co level scheme, and with shell-model calculations ⁵⁵Ni(p, γ)⁵⁶Cu, T₉=0.1-10; deduced Q value, astrophysical reaction rates as function of temperature, and impact on the r-process around ⁵⁶Ni.

NUCLEAR STRUCTURE ⁵⁶Cu; calculated levels, resonance energies, J, π, spectroscopic factors, Γ_p, Γ_γ using shell model with the GXPF1A interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.95.055806
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Data from this article have been entered in the XUNDL database. For more information, click here.

2016KA05      Eur.Phys.J. A 52, 6 (2016)

A.Kankainen, P.J.Woods, F.Nunes, C.Langer, H.Schatz, V.Bader, T.Baugher, D.Bazin, B.A.Brown, J.Browne, D.T.Doherty, A.Estrade, A.Gade, A.Kontos, G.Lotay, Z.Meisel, F.Montes, S.Noji, G.Perdikakis, J.Pereira, F.Recchia, T.Redpath, R.Stroberg, M.Scott, D.Seweryniak, J.Stevens, D.Weisshaar, K.Wimmer, R.Zegers

Angle-integrated measurements of the ²⁶Al (d, n) ²⁷Si reaction cross section: a probe of spectroscopic factors and astrophysical resonance strengths

NUCLEAR REACTIONS ²H(²⁶Al, n), E=30 MeV/nucleon; measured 511 keV γ-ray using GRETINA (Gamma-Ray Energy Tracking In-beam Nuclear Array), Si recoils, (Si)γ-coin; deduced Doppler-reconstructed γ-ray spectrum in coincidence with Si, σ, resonances, spectroscopic factors to discrete states; calculated σ using shell model.

doi: 10.1140/epja/i2016-16006-5
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2215. Data from this article have been entered in the XUNDL database. For more information, click here.

2016ME07      Phys.Rev. C 93, 035805 (2016)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Sieja, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Time-of-flight mass measurements of neutron-rich chromium isotopes up to N=40 and implications for the accreted neutron star crust

ATOMIC MASSES ^{59,60,61,62,63,64}Cr; measured mass excesses by time-of-flight (TOF) method using ⁹Be(⁸²Se, X), E=140 MeV/nucleon for production of Si to Zn isotopes and A1900 fragment separator and S800 spectrograph for fragment separation and analysis at NSCL-MSU. TOF versus mass contour plot obtained for Ar (A=44-49), K (A=47-52), Ca (A=49-55), Sc (A=52-58), Ti (A=54-60), V (A=57-63), Cr (A=59-66), Mn (A=62-70) and Fe (A=64-71) isotopes. Analyzed S(2n) trends and compared to AME-2012. Comparison with state-of-the-art shell-model calculations using modified Lenzi-Nowacki-Poves-Sieja interaction in the fp shell, and with AME-2012 data. Mass of ⁶⁴Cr used in accreted neutron star crust network calculations, and deduced reduction in strength depth of electron-capture heating from A=64 isobaric chain.

NUCLEAR REACTIONS ⁹Be(⁸²Se, X), E=140 MeV/nucleon; measured time-of-flight, energy loss, fragment yields of 150 isotopes from Si to Zn using A1900 fragment separator and S800 spectrograph at NSCL-MSU.

doi: 10.1103/PhysRevC.93.035805
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2015ME01      Phys.Rev.Lett. 114, 022501 (2015)

Z.Meisel, S.George, S.Ahn, J.Browne, D.Bazin, B.A.Brown, J.F.Carpino, H.Chung, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Mass Measurements Demonstrate a Strong N=28 Shell Gap in Argon

ATOMIC MASSES ^48,49Ar; measured time of flight; deduced masses, N=28 closed shell, problems of shell model calculations.

doi: 10.1103/PhysRevLett.114.022501
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2015ME08      Phys.Rev.Lett. 115, 162501 (2015)

Z.Meisel, S.George, S.Ahn, D.Bazin, B.A.Brown, J.Browne, J.F.Carpino, H.Chung, A.L.Cole, R.H.Cyburt, A.Estrade, M.Famiano, A.Gade, C.Langer, M.Matos, W.Mittig, F.Montes, D.J.Morrissey, J.Pereira, H.Schatz, J.Schatz, M.Scott, D.Shapira, K.Smith, J.Stevens, W.Tan, O.Tarasov, S.Towers, K.Wimmer, J.R.Winkelbauer, J.Yurkon, R.G.T.Zegers

Mass Measurement of ⁵⁶Sc Reveals a Small A=56 Odd-Even Mass Staggering, Implying a Cooler Accreted Neutron Star Crust

ATOMIC MASSES ^{52,53,54,55,56,57}Sc; measured rigidity-corrected time-of-flight distributions; deduced atomic mass excesses. Comparison with AME 2012, theoretical models.

doi: 10.1103/PhysRevLett.115.162501
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2014LA16      Phys.Rev.Lett. 113, 032502 (2014)

C.Langer, F.Montes, A.Aprahamian, D.W.Bardayan, D.Bazin, B.A.Brown, J.Browne, H.Crawford, R.H.Cyburt, C.Domingo-Pardo, A.Gade, S.George, P.Hosmer, L.Keek, A.Kontos, I-Y.Lee, A.Lemasson, E.Lunderberg, Y.Maeda, M.Matos, Z.Meisel, S.Noji, F.M.Nunes, A.Nystrom, G.Perdikakis, J.Pereira, S.J.Quinn, F.Recchia, H.Schatz, M.Scott, K.Siegl, A.Simon, M.Smith, A.Spyrou, J.Stevens, S.R.Stroberg, D.Weisshaar, J.Wheeler, K.Wimmer, R.G.T.Zegers

Determining the rp-Process Flow through ⁵⁶Ni: Resonances in ⁵⁷Cu(p, γ)⁵⁸Zn identified with GRETINA

NUCLEAR REACTIONS ²H(⁵⁷Cu, n), E=75 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced resonance energies, J, π, reaction rates. Shell model calculations, GXPF1A interaction.

doi: 10.1103/PhysRevLett.113.032502
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Data from this article have been entered in the XUNDL database. For more information, click here.

1995CH63      Phys.Rev. B51, 2826 (1995)

S.H.Chung, K.R.Jeffrey, J.R.Stevens

²³Na NMR Evidence for a Change of Diffusion Mechanism in NaClO₄-Poly(Propylene Oxide)

NUCLEAR MOMENTS ²³Na; measured NMR line shapes, spin-lattice relaxation times; deduced diffusion mechanism change evidence. Poly(propylene oxide) complex with NaClO₄.

doi: 10.1103/PhysRevB.51.2826
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1983ST17      Hyperfine Interactions 13, 221 (1983)

J.G.Stevens

Isomer Shift Reference Scales

COMPILATION ⁵⁷Fe, ⁹⁹Ru, ¹²¹Sb, ^127,129I, ¹⁴⁹Sm, ^151,153Eu, ¹⁵⁵Gd, ¹⁶¹Dy, ¹⁷⁰Yb, ¹⁸¹Ta, ¹⁹³Ir, ¹⁹⁷Au, ²³⁷Np, ¹¹⁹Sn, ¹²⁵Te; compiled, evaluated relative isomer shift values from Mossbauer spectra.

doi: 10.1007/BF01027252
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1976ST23      J.Phys.Chem.Ref.Data 5, 1093 (1977)

J.G.Stevens, B.D.Dunlap

Nuclear Moments and Moment Ratios as Determined by Mossbauer Spectroscopy

COMPILATION Z=26-95; compiled μ, quadrupole moment from Mossbauer spectroscopy. Literature cutoff date 12/74.

doi: 10.1063/1.555541
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1970ST13      Phys.Lett. 32A, 91 (1970)

J.J.Stevens, S.L.Ruby

Improved ¹²¹Sb Quadrupole Moment Ratio from Mossbauer Studies of Organic Antimony Compounds

NUCLEAR REACTIONS ¹²¹Sb(γ, γ), E=37.2 keV; measured Mossbauer effect in organic Sb compounds. ¹²¹Sb deduced quadrupole moment ratio for ground, first excited state.

doi: 10.1016/0375-9601(70)90105-2
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1966ST04      Nucl.Phys. 76, 129(1966)

J.Stevens, H.F.Lutz, S.F.Eccles

Elastic and Inelastic Scattering of Protons by ¹⁸O

NUCLEAR REACTIONS ¹⁸O(p, p'), E = 7.89-16.28 MeV; measured σ(E;Ep' θ); deduced optical parameters. ¹⁸O deduced deformation.

doi: 10.1016/0029-5582(66)90964-3
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF1089.

1964EC03      Bull.Am.Phys.Soc. 9, No.7, 704, B9 (1964)

S.F.Eccles, H.F.Lutz, J.Stevens

(p, α) Reaction on N¹⁵ and O¹⁸ at Energies Between 7.9 and 18.6 MeV

NUCLEAR STRUCTURE ¹⁵N, ¹⁸O; measured not abstracted; deduced nuclear properties.

Note: The following list of authors and aliases matches the search parameter J.Stevens: , J.G.STEVENS, J.J.STEVENS, J.R.STEVENS