NSR Query Results
Output year order : Descending NSR database version of May 6, 2024. Search: Author = R.Helmer Found 189 matches. Showing 1 to 100. [Next]2006HA36 Appl.Radiat.Isot. 64, 1392 (2006) J.C.Hardy, N.Nica, V.E.Iacob, M.B.Trzhaskovskaya, R.G.Helmer Test of internal-conversion theory with precise γ- and X-ray spectroscopy RADIOACTIVITY 193mIr(IT); measured Eγ, Iγ, X-ray spectra; deduced conversion coefficient. 134mCs, 137Ba; analyzed ICC ratio. Comparison with model predictions.
doi: 10.1016/j.apradiso.2006.02.093
2006HE06 Nucl.Data Sheets 107, 507 (2006) Nuclear Data Sheets for A = 153 COMPILATION 153La, 153Ce, 153Pr, 153Nd, 153Pm, 153Sm, 153Eu, 153Gd, 153Tb, 153Dy, 153Ho, 153Er, 153Tm, 153Yb, 153Lu, 153Hf; compiled, evaluated structure data.
doi: 10.1016/j.nds.2006.02.001
2004HE05 Nucl.Data Sheets 101, 325 (2004) Nuclear Data Sheets for A = 158 COMPILATION 158Nd, 158Pm, 158Sm, 158Eu, 158Gd, 158Tb, 158Dy, 158Ho, 158Er, 158Tm, 158Yb, 158Lu, 158Hf, 158Ta, 158W; compiled, evaluated structure data.
doi: 10.1016/j.nds.2004.02.001
2004HE29 Nucl.Data Sheets 103, 565 (2004) Nuclear Data Sheets for A = 157 COMPILATION 157Nd, 157Pm, 157Sm, 157Eu, 157Gd, 157Tb, 157Dy, 157Ho, 157Er, 157Tm, 157Yb, 157Lu, 157Hf, 157Ta; compiled, evaluated structure data.
doi: 10.1016/j.nds.2004.11.007
2004HE34 Appl.Radiat.Isot. 60, 173 (2004) R.G.Helmer, N.Nica, J.C.Hardy, V.E.Iacob Precise Efficiency Calibration of an HPGe Detector up to 3.5 MeV, with Measurements and Monte Carlo Calculations
doi: 10.1016/j.apradiso.2003.11.012
2004VO16 Phys.Rev.Lett. 93, 172501 (2004) C.Vockenhuber, F.Oberli, M.Bichler, I.Ahmad, G.Quitte, M.Meier, A.N.Halliday, D.-C.Lee, W.Kutschera, P.Steier, R.J.Gehrke, R.G.Helmer New Half-Life Measurement of 182Hf: Improved Chronometer for the Early Solar System RADIOACTIVITY 182Hf(β-); measured T1/2. Neutron activation, isotope dilution, activity measurement. Astrophysical implications discussed.
doi: 10.1103/PhysRevLett.93.172501
2003BE47 Phys.Rev. C 68, 034004 (2003) A.R.Berdoz, J.Birchall, J.B.Bland, J.D.Bowman, J.R.Campbell, G.H.Coombes, C.A.Davis, A.A.Green, P.W.Green, A.A.Hamian, R.Helmer, S.Kadantsev, Y.Kuznetsov, L.Lee, C.D.P.Levy, R.E.Mischke, N.T.Okumusoglu, S.A.Page, W.D.Ramsay, S.D.Reitzner, T.Ries, G.Roy, A.M.Sekulovich, J.Soukup, G.M.Stinson, T.J.Stocki, V.Sum, N.A.Titov, W.T.H.van Oers, R.J.Woo, S.Zadorozny, A.N.Zelenski, and the TRIUMF E497 Collaboration Parity violation in proton-proton scattering at 221 MeV NUCLEAR REACTIONS 1H(polarized p, p), E=221.3 MeV; measured parity-violating analyzing power; deduced constraints on meson-nucleon coupling constants.
doi: 10.1103/PhysRevC.68.034004
2003HE11 Nucl.Data Sheets 99, 483 (2003) Nuclear Data Sheets for A = 159 COMPILATION 159Pm, 159Sm, 159Eu, 159Gd, 159Tb, 159Dy, 159Ho, 159Er, 159Tm, 159Yb, 159Lu, 159Hf, 159Ta, 159W; compiled, evaluated structure data.
doi: 10.1006/ndsh.2003.0010
2003HE28 Nucl.Instrum.Methods Phys.Res. A511, 360 (2003) R.G.Helmer, J.C.Hardy, V.E.Iacob, M.Sanchez-Vega, R.G.Neilson, J.Nelson The Use of Monte Carlo Calculations in the Determination of a Ge Detector Efficiency Curve
doi: 10.1016/S0168-9002(03)01942-9
2002HA61 Appl.Radiat.Isot. 56, 65 (2002) J.C.Hardy, V.E.Iacob, M.Sanchez-Vega, R.T.Effinger, P.Lipnik, V.E.Mayes, D.K.Willis, R.G.Helmer Precise Efficiency Calibration of an HPGe Detector: Source Measurements and Monte Carlo Calculations with Sub-percent Precision
doi: 10.1016/S0969-8043(01)00168-3
2002HE09 Nucl.Data Sheets 95, 543 (2002) Nuclear Data Sheets for A = 87 COMPILATION 87Ge, 87As, 87Se, 87Br, 87Kr, 87Rb, 87Sr, 87Y, 87Zr, 87Nb, 87Mo, 87Tc, 87Ru; compiled, evaluated structure data.
doi: 10.1006/ndsh.2002.0006
2002TA22 Nucl.Instrum.Methods Phys.Res. A489, 178 (2002) N.J.Tagg, A.S.Hamer, B.Sur, E.D.Earle, R.L.Helmer, G.Jonkmans, B.A.Moffat, J.J.Simpson The 8Li Calibration Source for the Sudbury Neutrino Observatory RADIOACTIVITY 8Li(β-) [from 11B(n, α)]; measured Eβ, βα-coin. Use as calibration source in neutrino observatory discussed.
doi: 10.1016/S0168-9002(02)00860-4
2001BE70 Phys.Rev.Lett. 87, 272301 (2001) A.R.Berdoz, J.Birchall, J.B.Bland, J.D.Bowman, J.R.Campbell, G.H.Coombes, C.A.Davis, A.A.Green, P.W.Green, A.A.Hamian, R.Helmer, S.Kadantsev, L.Lee, C.D.P.Levy, R.E.Mischke, S.A.Page, W.D.Ramsay, S.D.Reitzner, T.Ries, G.Roy, A.M.Sekulovich, J.Soukup, G.M.Stinson, T.J.Strocki, V.Sum, N.A.Titov, W.T.H.van Oers, R.J.Woo, S.Zadorozny, A.N.Zelenski, and the TRIUMF E497 Collaboration Parity Violation in Proton-Proton Scattering at 221 MeV NUCLEAR REACTIONS 1H(polarized p, p), E=221 MeV; measured parity-violating longitudinal analyzing power; deduced weak meson-nucleon coupling constants.
doi: 10.1103/PhysRevLett.87.272301
2001HE40 Trans.Amer.Nucl.Soc. 84, 328 (2001) R.G.Helmer, J.C.Hardy, M.A.Ludington Precise Relative and Absolute Ge Detector Efficiencies for Gamma Rays
2001PA45 Phys.Rev. C64, 064611 (2001) M.M.Pavan, J.T.Brack, F.Duncan, A.Feltham, G.Jones, J.Lange, K.J.Raywood, M.E.Sevior, R.Adams, D.F.Ottewell, G.R.Smith, B.Wells, R.L.Helmer, E.L.Mathie, R.Tacik, R.A.Ristinen, I.I.Strakovsky, H.-M.Staudenmaier Precision Pion-Proton Elastic Differential Cross Sections at Energies Spanning the Δ Resonance NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), E=141.15-267.3 MeV; measured σ(θ), (pion)(proton)-coin. Comparison with model predictions.
doi: 10.1103/PhysRevC.64.064611
2000HE14 Nucl.Instrum.Methods Phys.Res. A450, 35 (2000) Recommended Standards for γ-Ray Energy Calibration (1999) COMPILATION 7Be, 22,24Na, 44Ti, 46Sc, 51Cr, 54Mn, 56,57,58,60Co, 59Fe, 65Zn, 66Ga, 75Se, 82Br, 84Rb, 85Sr, 88Y, 94Nb, 95Zr, 95mTc, 99Mo, 106Ru, 108m,110mAg, 109Cd, 113,125Sn, 124,125Sb, 132,137Cs, 133Ba, 139,141,144Ce, 152,154Eu, 153Sm, 153Gd, 160,161Tb, 166mHo, 169Yb, 170Tm, 172Hf, 182Ta, 185Os, 192Ir, 198,199Au, 203,210Pb, 203Hg, 207Bi, 228Th, 241Am; compiled γ-ray calibration standards.
doi: 10.1016/S0168-9002(00)00252-7
2000LU08 Nucl.Instrum.Methods Phys.Res. A446, 506 (2000) High Accuracy Measurements and Monte Carlo Calculations of the Relative Efficiency Curve of an HPGe Detector from 433 to 2754 KeV RADIOACTIVITY 108mAg(IT), (β-); 108Ag(β-); analyzed, evaluated data; deduced γ-ray intensities.
doi: 10.1016/S0168-9002(99)01253-X
2000QU01 Nucl.Phys. A663-664, 903c (2000) M.A.Quraan, P.Amaudruz, W.Andersson, M.Comyn, Yu.Davydov, P.Depommier, J.Doornbos, W.Faszer, C.A.Gagliardi, D.R.Gill, P.Green, P.Gumplinger, J.C.Hardy, M.Hasinoff, R.Helmer, R.Henderson, A.Khruchinsky, P.Kitching, D.D.Koetke, E.Korkmaz, Y.Lachin, D.Mass, J.A.Macdonald, R.Manweiler, T.Mathie, J.R.Musser, P.Nord, A.Olin, D.Ottewell, R.Openshaw, L.Piilonen, T.Porcelli, J.-M.Poutissou, R.Poutissou, N.L.Rodning, J.Schaapman, V.Selivanov, G.Sheffer, Y.Shin, F.Sobratee, J.Soukup, T.D.S.Stanislaus, G.Stinson, R.Tacik, V.Torokhov, R.E.Tribble, M.A.Vasiliev, H.K.Walter, D.Wright A Precision Measurement of Muon Decay
doi: 10.1016/S0375-9474(99)00793-9
2000RE14 Nucl.Data Sheets 90, 645 (2000) Nuclear Data Sheets for A = 161 COMPILATION 161Sm, 161Eu, 161Gd, 161Tb, 161Dy, 161Ho, 161Er, 161Tm, 161Yb, 161Lu, 161Hf, 161Ta, 161W, 161Re; compiled, analyzed structure data.
doi: 10.1006/ndsh.2000.0013
1999HE10 Nucl.Instrum.Methods Phys.Res. A422, 525 (1999) Recommended Standards for γ-Ray Energy Calibration COMPILATION A=7-241; compiled, evaluated Eγ from several sources; deduced recommended γ calibration standards.
doi: 10.1016/S0168-9002(98)01079-1
1999HE21 Nucl.Data Sheets 87, 317 (1999) Nuclear Data Sheets for A = 162 COMPILATION 162Eu, 162Gd, 162Tb, 162Dy, 162Ho, 162Er, 162Tm, 162Yb, 162Lu, 162Hf, 162Ta, 162W, 162Re, 162Os; compiled, analyzed structure data.
doi: 10.1006/ndsh.1999.0022
1998BE12 Nucl.Phys. A629, 433c (1998) A.R.Berdoz, J.Birchall, J.D.Bowman, J.R.Campbell, C.A.Davis, A.A.Green, P.W.Green, A.A.Hamian, D.C.Healey, R.Helmer, S.Kadantsev, Y.Kuznetsov, R.Laxdal, L.Lee, C.D.P.Levy, R.E.Mischke, S.A.Page, W.D.Ramsay, S.D.Reitzner, G.Roy, P.W.Schmor, A.M.Sekulovich, J.Soukup, G.M.Stinson, T.Stocki, V.Sum, N.A.Titov, W.T.H.van Oers, R.-J.Woo, A.N.Zelensky Parity Violation in Proton-Proton Scattering
doi: 10.1016/S0375-9474(97)00720-3
1998HE06 Nucl.Data Sheets 83, 285 (1998) Nuclear Data Sheets for A = 153 COMPILATION 153La, 153Ce, 153Pr, 153Nd, 153Pm, 153Sm, 153Eu, 153Gd, 153Tb, 153Dy, 153Ho, 153Er, 153Tm, 153Yb, 153Lu; compiled, evaluated structure data.
doi: 10.1006/ndsh.1998.0003
1998LO12 Phys.Rev. C57, 3191 (1998) S.A.Long, B.M.Spicer, K.J.Raywood, R.Abegg, W.P.Alford, A.Celler, D.Frekers, P.E.Green, O.Hausser, R.L.Helmer, R.S.Henderson, K.H.Hicks, K.P.Jackson, R.G.Jeppesen, N.S.P.King, C.A.Miller, M.A.Moinester, V.C.Officer, G.G.Shute, A.Trudel, M.C.Vetterli, A.I.Yavin, S.Yen Spin-Isovector Giant Resonances Induced by (n, p) Reactions on Heavy Nuclei NUCLEAR REACTIONS 120Sn, 181Ta(n, p), E=298 MeV; 238U(n, p), E=318 MeV; measured σ(Ep, θ). 90Zr, 208Pb(n, p), E=198 MeV; analyzed σ(Ep, θ). 90Y, 120In, 181Hf, 208Tl, 238Pa deduced L=0, 1, 2, 3 giant resonances energy distributions, quasi-free contributions, comparison with sum rules for L=1, 3. Multipole decomposition procedure.
doi: 10.1103/PhysRevC.57.3191
1998RE22 Nucl.Data Sheets 85, 171 (1998) Nuclear Data Sheets for A = 154 COMPILATION 154Ce, 154Pr, 154Nd, 154Pm, 154Sm, 154Eu, 154Gd, 154Tb, 154Dy, 154Ho, 154Er, 154Tm, 154Yb, 154Lu, 154Hf; compiled, evaluated structure data.
doi: 10.1006/ndsh.1998.0020
1998ZH14 Phys.Rev. C57, 2126 (1998) J.Zhao, R.Abegg, A.R.Berdoz, J.Birchall, J.R.Campbell, C.A.Davis, P.P.J.Delheij, L.Gan, P.W.Green, L.G.Greeniaus, D.Healey, R.Helmer, N.Kolb, E.Korkmaz, L.Lee, C.D.P.Levy, J.Li, C.A.Miller, A.K.Opper, S.A.Page, H.Postma, W.D.Ramsay, J.Soukup, G.M.Stinson, W.T.H.van Oers, A.N.Zelenski Precision Measurement of Charge Symmetry Breaking in np Elastic Scattering at 347 MeV NUCLEAR REACTIONS 1H(polarized n, n), E=347 MeV; measured neutron, proton A(θ); deduced charge symmetry breaking effects. Mirror-symmetric detection system, polarized target.
doi: 10.1103/PhysRevC.57.2126
1997DA12 Nucl.Phys. A621, 599c (1997) J.M.D'Auria, L.Buchmann, D.Hutcheon, P.Lipnik, D.Hunter, J.Rogers, R.Helmer, U.Giesen, A.Olin, P.Bricault A Facility for Studying Radiative Capture Reactions Induced with Radioactive Beams at ISAC
doi: 10.1016/S0375-9474(97)00311-4
1997GR09 Nucl.Instrum.Methods Phys.Res. A390, 95 (1997) R.C.Greenwood, R.G.Helmer, M.H.Putnam, K.D.Watts Measurement of β--Decay Intensity Distributions of Several Fission-Product Isotopes using a Total Absorption γ-Ray Spectrometer RADIOACTIVITY 138mCs, 90mRb(β-), (IT); 89,91,93,90Rb(β-); 93,94,95Sr, 94,95Y, 138,139,140,141Cs, 141,142,145,143,144Ba, 142,143,144,145La, 145,146,147,148Ce, 146,147,148Pr, 154,155,149,151,152,153Nd, 152,153,154,155,156,157Pm, 157,158Sm, 158Eu(β-); measured Eβ, Iβ; deduced Iβ distributions. Total absorption γ-ray spectrometer. Sources from 252Cf(SF-decay).
doi: 10.1016/S0168-9002(97)00356-2
1997HE06 Phys.Rev. C55, 2802 (1997) R.L.Helmer, M.A.Punyasena, R.Abegg, W.P.Alford, A.Celler, S.El-Kateb, J.Engel, D.Frekers, R.S.Henderson, K.P.Jackson, S.Long, C.A.Miller, W.C.Olsen, B.M.Spicer, A.Trudel, M.C.Vetterli Gamow-Teller Strength from the 76Se(n, p)76As Reaction: Implications for the double β decay of 76Ge NUCLEAR REACTIONS 76Se(n, p), E=198 MeV; measured σ(θ). 76As deduced Gamow-Teller strength distribution. 76Ge deduced 2ν-accompanied 2β-decay T1/2. Quasi-particle RPA comparison, other data analyzed.
doi: 10.1103/PhysRevC.55.2802
1996DA10 Phys.Rev. C53, 2052 (1996) C.A.Davis, R.Abegg, A.R.Berdoz, J.Birchall, J.R.Campbell, L.Gan, P.W.Green, L.G.Greeniaus, R.Helmer, E.Korkmaz, J.Li, C.A.Miller, A.K.Opper, S.A.Page, W.D.Ramsay, A.M.Sekulovich, V.Sum, W.T.H.van Oers, J.Zhao Zero-Crossing Angle of the n-p Analyzing Power NUCLEAR REACTIONS 1H(polarized n, n), E < 300 MeV; measured analyzing power vs θ; deduced n-, p-analyzing power crossing features.
doi: 10.1103/PhysRevC.53.2052
1996HE06 Nucl.Data Sheets 77, 471 (1996) Nuclear Data Sheets for A = 158 COMPILATION 158Pm, 158Sm, 158Eu, 158Gd, 158Tb, 158Dy, 158Ho, 158Er, 158Tm, 158Yb, 158Lu, 158Hf, 158Ta, 158W; compiled, evaluated structure data.
doi: 10.1006/ndsh.1996.0006
1996HE17 Nucl.Data Sheets 78, 219 (1996) Nuclear Data Sheets for A = 157 COMPILATION 157Nd, 157Pm, 157Sm, 157Gd, 157Tb, 157Dy, 157Ho, 157Er, 157Tm, 157Yb, 157Lu, 157Hf, 157Ta; compiled, evaluated structure data.
doi: 10.1006/ndsh.1996.0009
1996LA09 Phys.Rev. C53, 1774 (1996) B.Larson, K.Hicks, O.Hausser, R.Abegg, W.Alford, A.Celler, D.Frekers, R.Helmer, R.Henderson, K.P.Jackson, R.Jeppesen, J.Mildenberger, C.A.Miller, B.Pointon, R.Schubank, M.Vetterli, S.Yen Polarization Transfer in Inelastic Proton Scattering from 4- States in 16O at 350 MeV NUCLEAR REACTIONS 16O(polarized p, p'), E=350 MeV; measured σ(θ), analyzing powers, spin observables. DWIA analysis.
doi: 10.1103/PhysRevC.53.1774
1995AB30 Phys.Rev.Lett. 75, 1711 (1995) R.Abegg, A.R.Berdoz, J.Birchall, J.R.Campbell, C.A.Davis, P.P.J.Delheij, L.Gan, P.W.Green, L.G.Greeniaus, D.C.Healey, R.Helmer, N.Kolb, E.Korkmaz, L.Lee, C.D.P.Levy, J.Li, C.A.Miller, A.K.Opper, S.A.Page, H.Postma, W.D.Ramsay, J.Soukup, G.M.Stinson, W.T.H.van Oers, A.N.Zelensky, J.Zhao Precision Measurement of Charge Symmetry Breaking in np Elastic Scattering at 347 MeV NUCLEAR REACTIONS 1H(polarized n, n), E=347 MeV; measured asymmetry; deduced charge symmetry breaking, high precision.
doi: 10.1103/PhysRevLett.75.1711
1995GA47 Nucl.Instrum.Methods Phys.Res. A365, 185 (1995) L.Gan, R.Abegg, A.R.Berdoz, J.Birchall, J.R.Campbell, C.A.Davis, P.W.Green, L.G.Greeniaus, R.Helmer, E.Korkmaz, L.Lee, J.Li, C.A.Miller, A.K.Opper, S.A.Page, W.D.Ramsay, J.Soukup, W.T.H.van Oers, J.Zhao Properties of the TRIUMF Neutron Beam NUCLEAR REACTIONS 2H(polarized p, 2p), E=192, 280 MeV; analyzed neutron spectra; deduced improved corrections to systematic errors.
doi: 10.1016/0168-9002(95)00452-1
1995WI09 Phys.Rev. C51, 1144 (1995) A.L.Williams, W.P.Alford, E.Brash, B.A.Brown, S.Burzynski, H.T.Fortune, O.Hausser, R.Helmer, R.Henderson, P.P.Hui, K.P.Jackson, B.Larson, M.G.McKinzie, D.A.Smith, A.Trudel, M.Vetterli Gamow-Teller Strength in 60,62,64Ni(n, p) Reactions at 198 MeV NUCLEAR REACTIONS 60,62,64Ni(n, p), E=198 MeV; measured σ(θ, Ep). 60,62,64Co deduced Gamow-Teller transition strength. Multipole analyses.
doi: 10.1103/PhysRevC.51.1144
1994BU11 Nucl.Phys. A570, 722 (1994) S.Burzynski, K.P.Jackson, W.P.Alford, J.E.Cromer, R.Helmer, B.E.King, I.Slaus, B.Spicer, A.Trudel, S.Yen The Elastic and Inelastic Scattering of Intermediate Energy Protons on Deuterium at Small Momentum Transfer NUCLEAR REACTIONS 2H(p, p), (p, p'), E=198.5, 297.6, 456.6 MeV; measured σ(E, Ep, θ); deduced scattering length. Enriched target.
doi: 10.1016/0375-9474(94)90081-7
1994EL05 Phys.Rev. C49, 3128 (1994) S.El-Kateb, K.P.Jackson, W.P.Alford, R.Abegg, R.E.Azuma, B.A.Brown, A.Celler, D.Frekers, O.Hausser, R.Helmer, R.S.Henderson, K.H.Hicks, R.Jeppesen, J.D.King, K.Raywood, G.G.Shute, B.M.Spicer, A.Trudel, M.Vetterli, S.Yen Spin-Isospin Strength Distributions for fp Shell Nuclei: Results for the 55Mn(n, p), 56Fe(n, p), and 58Ni(n, p) reactions at 198 MeV NUCLEAR REACTIONS 55Mn, 56Fe, 58Ni(n, p), E=198 MeV; measured σ(θ, Ep). 55Mn, 56Fe, 58Ni deduced Gamow-Teller transition strength distribution.
doi: 10.1103/PhysRevC.49.3128
1994GE13 Nucl.Instrum.Methods Phys.Res. A353, 109 (1994) R.J.Gehrke, K.D.Watts, E.W.Killian, M.H.Putnam, R.G.Helmer PASS, an Extended-Range Ge Spectrometer for Radionuclide Analysis Via L X-, γ-Ray Spectrometry RADIOACTIVITY 239Pu, 241Am(α); 60Co, 137Cs(β-); analyzed data; deduced extended range Ge spectrometer characteristics for radionuclide analysis.
doi: 10.1016/0168-9002(94)91614-4
1994HE08 Phys.Rev. C49, 1845 (1994) An Excited State of 229Th at 3.5 eV RADIOACTIVITY 233U(α); measured Eγ, high precision. 229Th deduced level energy.
doi: 10.1103/PhysRevC.49.1845
1994HE21 Nucl.Data Sheets 72, 83 (1994) Nuclear Data Sheets Update for A = 159 COMPILATION 159Sm, 159Eu, 159Gd, 159Tb, 159Dy, 159Ho, 159Er, 159Tm, 159Yb, 159Lu, 159Hf, 159Ta, 159W; compiled, evaluated structure data.
doi: 10.1006/ndsh.1994.1023
1994HE26 Nucl.Instrum.Methods Phys.Res. A351, 406 (1994); Erratum Nucl.Instrum.Methods Phys.Res. A361, 628 (1995) R.G.Helmer, M.H.Putnam, R.C.Greenwood, H.Willmes Methodology for the Measurement of β--Decay Intensity Distributions from the Analysis of Total Absorption γ-Ray Spectra RADIOACTIVITY 90Sr(β-); 106Ru(β-); measured βγ-coin. 141Cs(β-); measured Eγ, Iγ, βγ-coin; deduced Iβ distributions. Total absorption γ-spectrometer.
doi: 10.1016/0168-9002(94)91370-6
1994HE33 Nucl.Instrum.Methods Phys.Res. A339, 189 (1994) R.G.Helmer, R.C.Greenwood, K.D.Watts, M.H.Putnam Beta-Particle Feeding Distributions for 138-141Cs from Total Absorption Gamma-Ray Spectrometer (TAGS) RADIOACTIVITY 138mCs(IT), (β-); 138,139,140,141Cs(β-); measured γγ-coin, sum spectra. 138,139,140,141Cs levels deduced β-feeding distribution.
doi: 10.1016/0168-9002(94)91803-1
1994HE45 Nucl.Instrum.Methods Phys.Res. A353, 222 (1994) R.G.Helmer, R.C.Greenwood, M.H.Putnam, K.D.Watts Beta-Decay Intensity Distributions for the Fission Products 139Cs and 140Cs Measured with a Total Absorption γ-Ray Spectrometer RADIOACTIVITY 140,139Cs(β-) [from 252Cf(SF)]; measured Eγ, Iγ, βγ-coin, Iβ, Eβ; deduced Iβ. Total absorption γ-spectrometer.
doi: 10.1016/0168-9002(94)91643-8
1994KU19 Phys.Rev. C50, 1771 (1994) S.E.Kuhn, W.J.Cummings, G.E.Dodge, S.S.Hanna, B.H.King, Y.M.Shin, J.G.Congleton, R.Helmer, R.B.Schubank, N.R.Stevenson, U.Wienands, Y.K.Lee, G.R.Mason, B.E.King, K.S.Chung, J.M.Lee, D.P.Rosenzweig Multinucleon Effects in Muon Capture on 3He at High Energy Transfer NUCLEAR REACTIONS 3He(μ-, p), (μ-, d), (μ-, np), E at rest; measured proton, deuteron, np-coin spectra. PWIA with, without breakup channel.
doi: 10.1103/PhysRevC.50.1771
1993AB15 Nucl.Instrum.Methods Phys.Res. B79, 318 (1993) R.Abegg, C.A.Davis, P.P.J.Delheij, R.Helmer, C.A.Miller, A.R.Berdoz, J.Birchall, J.R.Campbell, S.A.Page, W.D.Ramsay, W.T.H.van Oers, J.Zhao, P.W.Green, L.G.Greeniaus, N.Kolb, E.Korkmaz, J.Li, A.Opper Search for Charge Symmetry Violation in np Elastic Scattering NUCLEAR REACTIONS 1H(polarized n, n), (n, n), E=350 MeV; measured np-coin. Polarized, unpolarized target.
doi: 10.1016/0168-583X(93)95354-8
1993AL21 Phys.Rev. C48, 2818 (1993) W.P.Alford, B.A.Brown, S.Burzynski, A.Celler, D.Frekers, R.Helmer, R.Henderson, K.P.Jackson, K.Lee, A.Rahav, A.Trudel, M.C.Vetterli Spin-Isospin Strength Distributions in f-p Shell Nuclei: A study of the 51V(n, p) and 59Co(n, p) reactions at 198 MeV NUCLEAR REACTIONS 51V, 59Co(n, p), E=198 MeV; measured σ(θ, Ep). 51Ti, 59Fe deduced Gamow-Teller, spin-dipole strength distribution. Multipole analysis, model comparison.
doi: 10.1103/PhysRevC.48.2818
1993BI06 Nucl.Phys. A553, 823c (1993) J.Birchall, A.R.Berdoz, J.D.Bowman, J.R.Campbell, C.A.Davis, N.E.Davison, P.W.Green, A.Hamian, D.C.Healey, R.Helmer, E.Korkmaz, P.Levy, R.E.Mischke, S.A.Page, W.D.Ramsay, G.Roy, P.W.Schmor, J.Soukup, G.M.Stinson, T.J.Stocki, N.A.Titov, W.T.H.van Oers, A.N.Zelensky Parity Violation in p-p Scattering
doi: 10.1016/0375-9474(93)90704-2
1993CE03 Phys.Rev. C47, 1563 (1993) A.Celler, S.Yen, W.P.Alford, R.Abegg, B.A.Brown, S.Burzynski, D.Frekers, O.Hausser, R.Helmer, R.S.Henderson, K.Hicks, K.P.Jackson, R.Jeppesen, C.A.Miller, M.A.Moinester, B.W.Pointon, A.Trudel, M.C.Vetterli Search for Gamow-Teller Strength in the Continuum via the 3He(n, p)3H Reaction at 288 MeV NUCLEAR REACTIONS 3He(n, p), E=288 MeV; measured σ(θ), σ(θ, E); deduced model parameters, continuum Gamow-Teller transition strength upper limit.
doi: 10.1103/PhysRevC.47.1563
1993HE11 Nucl.Data Sheets 69, 507 (1993) Nuclear Data Sheets Update for A = 154 COMPILATION 154Pr, 154Nd, 154Pm, 154Sm, 154Eu, 154Gd, 154Tb, 154Dy, 154Ho, 154Er, 154Tm, 154Yb, 154Lu, 154Hf; compiled, evaluated structure data.
doi: 10.1006/ndsh.1993.1035
1993HE18 Nucl.Instrum.Methods Phys.Res. A330, 434 (1993); Erratum Nucl.Instrum.Methods Phys.Res. A361, 629 (1995) γ-Ray Energies for Calibration from the Decay of 161Tb, 172Hf + 172Lu, and 241Am RADIOACTIVITY 161Tb(β-); 172Hf, 172Lu(EC); 241Am(α); measured Eγ, Iγ; deduced 172Hf suitability as calibration source. 237Np deduced transition energy. Small Si(Li), planar hyperpure Ge detector.
doi: 10.1016/0168-9002(93)90572-Y
1993PO05 Phys.Rev. C47, 2751 (1993) R.Pourang, J.W.Watson, R.Abegg, M.Ahmad, W.P.Alford, B.D.Anderson, A.R.Baldwin, A.Celler, D.Frekers, O.Hausser, R.Helmer, R.Henderson, K.Hicks, R.Jeppesen, K.P.Jackson, N.S.P.King, R.Madey, C.A.Miller, M.Moinester, M.C.Vetterli, S.Yen High-Spin Stretched States Excited in (n, p) Reactions at 300 MeV NUCLEAR REACTIONS 12C, 28Si, 120Sn(n, p), E=300 MeV; measured spectra, σ(θ). 12B, 28Al, 120In deduced stretched states normalizations. DWIA analysis.
doi: 10.1103/PhysRevC.47.2751
1992CU01 Phys.Rev.Lett. 68, 293 (1992) W.J.Cummings, G.E.Dodge, S.S.Hanna, B.H.King, S.E.Kuhn, Y.M.Shin, R.Helmer, R.B.Schubank, N.R.Stevenson, U.Wienands, Y.K.Lee, G.R.Mason, B.E.King, K.S.Chung, J.M.Lee, D.P.Rosenzweig Energetic Protons and Deuterons Emitted following μ- Capture by 3He Nuclei NUCLEAR REACTIONS 3He(μ-, X), E at rest; measured p-, d-spectra; deduced capture strength, nucleon-nucleon correlations, meson exchange currents role.
doi: 10.1103/PhysRevLett.68.293
1992GR18 Nucl.Instrum.Methods Phys.Res. A314, 514 (1992) R.C.Greenwood, R.G.Helmer, M.A.Lee, M.H.Putnam, M.A.Oates, D.A.Struttmann, K.D.Watts Total Absorption Gamma-Ray Spectrometer for Measurement of Beta-Decay Intensity Distributions for Fission Product Radionuclides RADIOACTIVITY 137Cs(β-), 24Na(β-), 60Co(β-), 110mAg(β-), (IT); measured Eγ, Iγ. 141Ba(β-); 140,139Cs(β-); measured γ-, β-spectra, βγ-coin. Fission products, total absorption γ-ray spectrometer.
doi: 10.1016/0168-9002(92)90243-W
1992HE01 Nucl.Data Sheets 65, 65 (1992) Nuclear Data Sheets Update for A = 156 COMPILATION 156Nd, 156Pm, 156Sm, 156Eu, 156Gd, 156Tb, 156Dy, 156Ho, 156Er, 156Tm, 156Yb, 156Lu, 156Hf, 156Ta; compiled, evaluated structure data.
doi: 10.1016/0090-3752(92)80006-6
1992VE01 Phys.Rev. C45, 997 (1992) M.C.Vetterli, K.P.Jackson, A.Celler, J.Engel, D.Frekers, O.Hausser, R.Helmer, R.Henderson, K.H.Hicks, R.G.Jeppesen, B.Larson, B.Pointon, A.Trudel, S.Yen 70,72Ge(n, p)70,72Ga Reactions: Suppression of Gamow-Teller strength near N = 40 NUCLEAR REACTIONS 70,72Ge(n, p), E=200 MeV; measured σ(θ, E). 70,72Ga deduced Gamow-Teller transition strength quenching.
doi: 10.1103/PhysRevC.45.997
1991AL17 Nucl.Phys. A531, 97 (1991) W.P.Alford, A.Celler, B.A.Brown, R.Abegg, K.Ferguson, R.Helmer, K.P.Jackson, S.Long, K.Raywood, S.Yen Measurement of Gamow-Teller and Spin Dipole Strength in the 45Sc(n, p)45Ca Reaction at 198 MeV NUCLEAR REACTIONS 45Sc(n, p), E=198 MeV; measured σ(Ep, θ). 45Ca deduced Gamow-Teller transition strength. Shell model comparison.
doi: 10.1016/0375-9474(91)90571-M
1991CE01 Phys.Rev. C43, 639 (1991) A.Celler, W.P.Alford, R.Abegg, D.Frekers, O.Hausser, R.Helmer, R.S.Henderson, K.P.Jackson, R.Jeppesen, B.Larson, J.Mildenberger, B.W.Pointon, A.Trudel, M.Vetterli, S.Yen Distribution of Spin Dipole Transition Strength in the 15N(n, p)15C Reaction NUCLEAR REACTIONS 15N(n, p), E=288 MeV; measured σ(θ); deduced ΔL for transitions. Shell model, DWIA, multipole decomposition analyses.
doi: 10.1103/PhysRevC.43.639
1991HA01 Phys.Rev. C43, 230 (1991) O.Hausser, M.C.Vetterli, R.W.Fergerson, C.Glashausser, R.C.Jeppesen, R.D.Smith, R.Abegg, F.T.Baker, A.Celler, R.L.Helmer, R.Henderson, K.Hicks, M.J.Iqbal, K.P.Jackson, K.W.Jones, J.Lisantti, J.Mildenberger, C.A.Miller, R.S.Sawafta, S.Yen Nuclear Response in the 54Fe(p(pol), p(pol)') Reaction at 290 MeV NUCLEAR REACTIONS 54Fe(polarized p, p'), E=290 MeV; measured σ(θ), spin observables, analyzing power, spin-flip probabilities. 54Fe(n, p), E=298 MeV; analyzed data. 54Fe deduced isovector giant dipole, isoscalar giant quadrupole resonance. 54Mn deduced Gamow-Teller transition strength, quenching. Surface RPA model.
doi: 10.1103/PhysRevC.43.230
1991HE13 Nucl.Data Sheets 64, 79 (1991) Nuclear Data Sheets for A = 162 COMPILATION 162Eu, 162Gd, 162Tb, 162Dy, 162Ho, 162Er, 162Tm, 162Yb, 162Lu, 162Hf, 162Ta, 162W, 162Re, 162Os; compiled, evaluated structure data.
doi: 10.1016/S0090-3752(05)80014-6
1991IW01 Phys.Rev. C43, 1099 (1991) M.Iwasaki, A.Trudel, A.Celler, O.Hausser, R.S.Hayano, R.Helmer, R.Henderson, S.Hirenzaki, K.P.Jackson, Y.Kuno, N.Matsuoka, J.Mildenberger, C.A.Miller, H.Outa, H.Sakai, H.Toki, M.Vetterli, Y.Watanabe, T.Yamazaki, S.Yen Search for Deeply Bound Pionic States in 208Pb using the 208Pb(n, p) Reaction at T(n) = 418 MeV NUCLEAR REACTIONS 208Pb(n, p), E=418 MeV; measured σ(θp, Ep), σ(θ=0°). DWIA analysis.
doi: 10.1103/PhysRevC.43.1099
1991KI08 Phys.Rev. C44, 1077 (1991) J.D.King, D.Frekers, R.Abegg, R.E.Azuma, L.Buchmann, C.Chan, T.E.Drake, R.Helmer, K.P.Jackson, L.Lee, C.A.Miller, E.Rost, R.Sawafta, R.Schubank, S.S.M.Wong, S.Yen, X.Q.Zhu Excitation of the 10.957 MeV 0-; T = 0 State in 16O by 400 MeV Protons NUCLEAR REACTIONS 16O(polarized p, p'), E=400 MeV; measured σ(θ), analyzing power vs θ; deduced reaction mechanism.
doi: 10.1103/PhysRevC.44.1077
1991PO05 Phys.Rev. C44, 689 (1991) R.Pourang, J.W.Watson, M.Ahmad, W.P.Alford, B.D.Anderson, A.R.Baldwin, A.Celler, M.Elaasar, C.C.Foster, R.Helmer, O.Hausser, K.P.Jackson, C.A.Miller, R.Madey, M.Moinester, M.Mostajaboddavati, N.Tamimi, S.Yen Energy Dependence of Stretched States Excited in (p, n) Reactions NUCLEAR REACTIONS 28Si, 88Sr(p, n), E=100-400 MeV; measured σ(θn, En), σ(θ). 28P, 88Y deduced stretched states features. Distorted wave impulse approximation.
doi: 10.1103/PhysRevC.44.689
1991YE03 Phys.Lett. 269B, 59 (1991) S.Yen, R.Abegg, W.P.Alford, S.Burzynski, A.Celler, D.Frekers, R.Helmer, K.P.Jackson, J.Lu, C.A.Miller, R.Schubank, I.I.Strakovsky, A.Trudel, M.C.Vetterli, Y.S.Wu Search for Resonant Structure in the Cu(p, π(±))X Reaction NUCLEAR REACTIONS Cu(p, π+X), (p, π-X), E=346-358 MeV; measured pion production σ ratio vs E, vs proton production; deduced yield enhancements upper limits for resonances in Cu.
doi: 10.1016/0370-2693(91)91452-2
1990AL19 Nucl.Phys. A514, 49 (1990) W.P.Alford, R.L.Helmer, R.Abegg, A.Celler, D.Frekers, P.Green, O.Hausser, R.Henderson, K.Hicks, K.P.Jackson, R.Jeppesen, C.A.Miller, A.Trudel, M.Vetterli, S.Yen, R.Pourang, J.Watson, B.A.Brown, J.Engel Gamow-Teller Strength Observed in the 48Ti(n, p)48Sc Reaction: Implications for the double beta decay of 48Ca NUCLEAR REACTIONS 48Ti(n, p), E=198 MeV; measured σ(θ). 48Sc deduced Gamow-Teller strength distribution. Shell model comparison.
doi: 10.1016/0375-9474(90)90331-F
1990FR07 Phys.Lett. 244B, 178 (1990) D.Frekers, H.J.Wortche, A.Richter, R.Abegg, R.E.Azuma, A.Celler, C.Chan, T.E.Drake, R.Helmer, K.P.Jackson, J.D.King, C.A.Miller, R.Schubank, M.C.Vetterli, S.Yen Spin Excitations in the Deformed Nuclei 154Sm, 158Gd and 168Er NUCLEAR REACTIONS 154,158Gd, 168Er(p, p'), E=200 MeV; measured σ(θ), σ(Ep'). 154Sm deduced B(M1) strength function. 158Gd, 168Er deduced B(λ).
doi: 10.1016/0370-2693(90)90051-7
1990HE02 Appl.Radiat.Isot. 41, 101 (1990) 181Hf Gamma-Emission Probabilities RADIOACTIVITY 181Hf; measured relative Iγ, Eγ; deduced γ-emission probabilities.
doi: 10.1016/0883-2889(90)90137-6
1990HE05 Appl.Radiat.Isot. 41, 75 (1990) Selected Gamma-Ray Energies and Emission Probabilities for the Decay of 125Sb and 154Eu RADIOACTIVITY 125Sb, 154Eu; measured Eγ, Iγ; deduced relative γ-emission probabilities.
doi: 10.1016/0883-2889(90)90133-2
1990HE07 Nucl.Data Sheets 59, 1 (1990) Nuclear Data Sheets for A = 161 COMPILATION 161Eu, 161Gd, 161Tb, 161Dy, 161Ho, 161Er, 161Tm, 161Yb, 161Lu, 161Hf, 161Ta, 161W, 161Re; compiled, evaluated structure data.
doi: 10.1016/S0090-3752(05)80079-1
1990HE16 Appl.Radiat.Isot. 41, 791 (1990) Relative Gamma-Ray Emission Probability for the Decay of 207Bi RADIOACTIVITY 207Bi; measured relative γ-emission probability following decay.
doi: 10.1016/0883-2889(90)90031-B
1990HE18 Nucl.Data Sheets 61, 93 (1990) Nuclear Data Sheets for A = 206 COMPILATION 206Hg, 206Tl, 206Pb, 206Bi, 206Po, 206At, 206Rn, 206Fr, 206Ra; compiled, evaluated structure data.
doi: 10.1016/S0090-3752(05)80132-2
1990KO17 Phys.Rev. C41, 2571 (1990) R.G.Korteling, R.E.L.Green, J.M.D'Auria, R.L.Helmer, K.P.Jackson, S.B.Kaufman, B.D.Wilkins Light Fragment Emission as Studied by the (p, pHe) Reactions on Be and Ag with 300 MeV Protons NUCLEAR REACTIONS Be, Ag(p, pX), E=300 MeV; measured σ(Ep, θ), σ(E, fragment θ) for X=p, 3,4He; deduced differential mean multiplicities, invariant σ, rapidities.
doi: 10.1103/PhysRevC.41.2571
1990MI10 Phys.Rev. C42, 732 (1990) J.Mildenberger, O.Hausser, R.G.Jeppesen, B.Larson, B.Pointon, A.Trudel, R.Henderson, K.Hicks, K.P.Jackson, A.Miller, M.Vetterli, S.Yen, W.P.Alford, A.Celler, R.Helmer Isospin Symmetry in Nucleon Scattering from 6Li and 12C at 280 MeV NUCLEAR REACTIONS 6Li, 12C(n, p), (p, p'), (p, n), E=280 MeV; measured σ(θ), σ(Ep); deduced isospin symmetry test.
doi: 10.1103/PhysRevC.42.732
1990RA13 Phys.Rev. C41, 2836 (1990) K.J.Raywood, B.M.Spicer, S.Yen, S.A.Long, M.A.Moinester, R.Abegg, W.P.Alford, A.Celler, T.E.Drake, D.Frekers, P.E.Green, O.Hausser, R.L.Helmer, R.S.Henderson, K.H.Hicks, K.P.Jackson, R.G.Jeppesen, J.D.King, N.S.P.King, C.A.Miller, V.C.Officer, R.Schubank, G.G.Shute, M.Vetterli, J.Watson, A.I.Yavin Spin-Flip Isovector Giant Resonances from the 90Zr(n, p)90Y Reaction at 198 MeV NUCLEAR REACTIONS 90Zr(n, p), E=198 MeV; measured σ(Ep, θ); deduced σ(θ). 90Y deduced spin isovector dipole transition strengths.
doi: 10.1103/PhysRevC.41.2836
1990RE03 Phys.Rev.Lett. 64, 271 (1990) Energy Separation of the Doublet of Intrinsic States at the Ground States of 229Th RADIOACTIVITY 233U(α); measured Eγ, Iγ. 229Th deduced low energy doublet separation.
doi: 10.1103/PhysRevLett.64.271
1990WA17 Phys.Rev. C42, 2143 (1990) R.E.Warner, E.Cheung, C.F.Perdrisat, V.Punjabi, C.A.Davis, R.Helmer, A.Galonsky, L.Heilbronn, D.Krofcheck, S.E.Darden, J.J.Kolata, F.D.Becchetti, P.Schwandt Spectral Function of p-n Pairs in 6Li, from the 6Li(p, pα)pn Reaction at 200 MeV NUCLEAR REACTIONS 6Li(polarized p, pα), E=200 MeV; measured σ(θp, θα, Ep, Eα) vs (pn)-internal momentum. 6Li deduced dα-cluster probability.
doi: 10.1103/PhysRevC.42.2143
1989AL04 Phys.Rev. C39, 1189 (1989) W.P.Alford, R.Helmer, R.Abegg, A.Celler, D.Frekers, O.Hausser, R.Henderson, K.Hicks, K.P.Jackson, R.Jeppesen, C.A.Miller, M.Vetterli Zero Degree Cross Section for the Reaction 14C(p, n)14N(2.31), 14N(3.95) at 200, 300, and 450 MeV NUCLEAR REACTIONS 14C(p, n), E=200, 300, 450 MeV; measured σ(E(p)), θ=0°; deduced isovector effective interactions. 14N levels deduced Fermi, Gamow-Teller transition σ. Enriched target. DWIA analysis.
doi: 10.1103/PhysRevC.39.1189
1989CE02 Phys.Lett. 227B, 336 (1989) D.A.Cebra, W.Benenson, Y.Chen, E.Kashy, A.Pradhan, A.Vander Molen, G.D.Westfall, W.K.Wilson, D.J.Morrissey, R.S.Tickle, R.Korteling, R.L.Helmer Two-Particle Correlations from 500 MeV p + Ag and Be NUCLEAR REACTIONS Ag, Be(p, 2pX), (p, 2dX), (p, dαX), (p, pdX), (p, pαX), (p, 2tX), E=500 MeV; measured light (particle)(particle)-correlations; deduced reaction mechanism.
doi: 10.1016/0370-2693(89)90940-4
1989HI10 Phys.Rev. C40, R2445 (1989) K.H.Hicks, M.C.Vetterli, A.Celler, R.L.Helmer, R.S.Henderson, K.P.Jackson, R.G.Jeppesen, A.Trudel, S.Yen Quasifree Analyzing Powers using the (p(pol), n) Reaction NUCLEAR REACTIONS 12C, 54Fe(polarized p, n), E=290, 420 MeV; measured σ(θn, En), analyzing power. Relativistic, nonrelativistic model analysis.
doi: 10.1103/PhysRevC.40.R2445
1989LE04 Nucl.Phys. A492, 607 (1989) L.Lee, T.E.Drake, S.S.M.Wong, D.Frekers, R.E.Azuma, L.Buchmann, A.Galindo-Uribarri, J.D.King, R.Schubank, R.Abegg, R.Helmer, K.P.Jackson, C.A.Miller, S.Yen Intermediate-Energy Proton Scattering to the Ground and Negative-Parity States of 40Ca, 90Zr and 208Pb NUCLEAR REACTIONS 40Ca(polarized p, p'), E=362 MeV; 90Zr(polarized p, p'), E=400 MeV; 208Pb(polarized p, p'), E=200, 400 MeV; measured σ(θ), A(y)(θ). Natural 40Ca, enriched 90Zr, 208Pb targets. Nonrelativistic microscopic density-dependent model analysis.
doi: 10.1016/0375-9474(89)90111-5
1989LE06 J.Phys.(London) G15, L91 (1989) L.Lee, T.E.Drake, S.S.M.Wong, D.Frekers, R.E.Azuma, L.Buchmann, A.Galindo-Uribarri, J.D.King, R.Schubank, R.Abegg, R.Helmer, K.P.Jackson, C.A.Miller, S.Yen Inelastic Proton Scattering to the Positive-Parity States in 90Zr at 400 MeV NUCLEAR REACTIONS 90Zr(polarized p, p'), E=400 MeV; measured σ(θ), A(θ). Enriched target. Nonrelativistic microscopic density-dependent model analysis.
doi: 10.1088/0954-3899/15/5/006
1989MO19 Phys.Lett. 230B, 41 (1989) M.A.Moinester, A.Trudel, K.Raywood, S.Yen, B.M.Spicer, R.Abegg, W.P.Alford, N.Auerbach, A.Celler, D.Frekers, O.Hausser, R.L.Helmer, R.Henderson, K.H.Hicks, K.P.Jackson, R.G.Jeppesen, N.S.P.King, S.Long, C.A.Miller, M.Vetterli, J.Watson, A.I.Yavin A Study of Spin Isovector Giant Resonances with the 208Pb(n, p)208Tl Reaction NUCLEAR REACTIONS 208Pb(n, p), E=198, 458 MeV; measured σ(θp, Ep). 208Tl deduced spin isovector giant resonances.
doi: 10.1016/0370-2693(89)91650-X
1989VE05 Phys.Rev. C40, 559 (1989) M.C.Vetterli, O.Hausser, R.Abegg, W.P.Alford, A.Celler, D.Frekers, R.Helmer, R.Henderson, K.H.Hicks, K.P.Jackson, R.G.Jeppesen, C.A.Miller, K.Raywood, S.Yen Gamow-Teller Strength Deduced from Charge Exchange Reactions on 54Fe at 300 MeV NUCLEAR REACTIONS 54Fe(n, p), E=298 MeV; 54Fe(p, n), E=300 MeV; measured σ(θ, Ep), σ(θ, En). 54Co, 54Mn deduced Gamow-Teller transition strengths.
doi: 10.1103/PhysRevC.40.559
1989WA15 Phys.Rev. C40, 22 (1989) J.W.Watson, R.Pourang, R.Abegg, W.P.Alford, A.Celler, S.El-Kateb, D.Frekers, O.Hausser, R.Helmer, R.Henderson, K.Hicks, K.P.Jackson, R.G.Jeppesen, C.A.Miller, M.Vetterli, S.Yen, C.D.Zafiratos 7Li(p, n)7Be and 12C(p, n)12N Reactions at 200, 300, and 400 MeV NUCLEAR REACTIONS 7Li, 12C(p, n), E=200-400 MeV; measured σ(θ).
doi: 10.1103/PhysRevC.40.22
1988HA09 Phys.Rev. C37, 1119 (1988) O.Hausser, R.Sawafta, R.G.Jeppesen, R.Abegg, W.P.Alford, R.L.Helmer, R.Henderson, K.Hicks, K.P.Jackson, J.Lisantti, C.A.Miller, M.C.Vetterli, S.Yen Energy Dependence of Isovector and Isoscalar 1+ Excitations in 28Si(p, p') between 200 and 400 MeV NUCLEAR REACTIONS 28Si(p, p'), E=200-400 MeV; measured σ(θ). 28Si deduced isovector 1+ transition strengths, summed Gamow-Teller strengths.
doi: 10.1103/PhysRevC.37.1119
1988HA27 Phys.Rev.Lett. 61, 822 (1988) O.Hausser, R.Abegg, R.G.Jeppesen, R.Sawafta, A.Celler, A.Green, R.L.Helmer, R.Henderson, K.Hicks, K.P.Jackson, J.Mildenberger, C.A.Miller, M.C.Vetterli, S.Yen, M.J.Iqbal, R.D.Smith Complete Spin Observables for Quasielastic Proton Scattering from 54Fe at 290 MeV NUCLEAR REACTIONS 54Fe(polarized p, p'X), E=290 MeV; measured σ(θ, Ep'), spin-transfer σ(θ, Ep'), analyzing power, spin observables; deduced Fermi motion, nuclear response function, nucleon-nucleon interaction role. Relativistic, non-relativistic models, impulse approximation.
doi: 10.1103/PhysRevLett.61.822
1988HE14 Nucl.Data Sheets 55, 71 (1988) Nuclear Data Sheets for A = 157 COMPILATION 157Pm, 157Sm, 157Eu, 157Gd, 157Tb, 157Dy, 157Ho, 157Er, 157Tm, 157Yb, 157Lu, 157Hf, 157Ta; compiled, evaluated structure data.
doi: 10.1016/S0090-3752(88)80035-8
1988HI03 Phys.Lett. 201B, 29 (1988) K.H.Hicks, O.Hausser, R.Abegg, W.P.Alford, A.Celler, R.L.Helmer, R.S.Henderson, K.P.Jackson, J.Lisantti, C.A.Miller, R.Sawafta, J.R.Shepard, S.Yen P-A(y) for Excitation of Natural- and Unnatural-Parity States of 12C by 400 MeV Protons NUCLEAR REACTIONS 12C(p, p'), E=400 MeV; measured polarization, analyzing power differences. Nonrelativistic, relativistic model calculations.
doi: 10.1016/0370-2693(88)90074-3
1988JA01 Phys.Lett. 201B, 25 (1988) K.P.Jackson, A.Celler, W.P.Alford, K.Raywood, R.Abegg, R.E.Azuma, C.K.Campbell, S.El-Kateb, D.Frekers, P.W.Green, O.Hausser, R.L.Helmer, R.S.Henderson, K.H.Hicks, R.Jeppesen, P.Lewis, C.A.Miller, A.Moalem, M.A.Moinester, R.B.Schubank, G.G.Shute, B.M.Spicer, M.C.Vetterli, A.I.Yavin, S.Yen The (n, p) Reaction as a Probe of Gamow-Teller Strength NUCLEAR REACTIONS 6Li, 12,13C(n, p), E=198 MeV; measured σ(θ), σ(θp).
doi: 10.1016/0370-2693(88)90073-1
1988LE10 Phys.Lett. 205B, 219 (1988) L.Lee, T.E.Drake, S.S.M.Wong, D.Frekers, R.E.Azuma, L.Buchmann, A.Galindo-Uribarri, J.D.King, R.Schubank, R.Abegg, R.Helmer, K.P.Jackson, C.A.Miller, S.Yen, H.V.von Geramb Intermediate Energy Proton Scattering from 40Ca, 90Zr and 208Pb NUCLEAR REACTIONS 40Ca, 90Zr, 208Pb(polarized p, p), E=200, 362, 400 MeV; measured σ(θ), analyzing power vs θ, spin rotation parameter vs θ.
doi: 10.1016/0370-2693(88)91653-X
1988ME02 Phys.Rev. C37, 544 (1988) H.O.Meyer, P.Schwandt, R.Abegg, C.A.Miller, K.P.Jackson, S.Yen, G.Gaillard, M.Hugi, R.Helmer, D.Frekers, A.Saxena Proton Elastic Scattering from 12C at 250 MeV and Energy Dependent Potentials between 200 and 300 MeV NUCLEAR REACTIONS 12C(polarized p, p), E=200-300 MeV; measured σ(E, θ), A(E, θ); deduced optical model parameters, energy dependence. Dirac phenomenology.
doi: 10.1103/PhysRevC.37.544
1988YE01 Phys.Lett. 206B, 597 (1988) S.Yen, B.M.Spicer, M.A.Moinester, K.Raywood, R.Abegg, W.P.Alford, A.Celler, T.E.Drake, D.Frekers, O.Hausser, R.L.Helmer, R.S.Henderson, K.H.Hicks, K.P.Jackson, R.Jeppesen, J.D.King, N.S.P.King, K.Lin, S.Long, C.A.Miller, V.C.Officer, R.Schubank, G.G.Shute, M.C.Vetterli, A.I.Yavin Gamow-Teller Strength and Giant Resonances in 90Zr(n, p) at 198 MeV NUCLEAR REACTIONS 90Zr(n, p), E=198 MeV; measured σ(θp, Ep). 90Y deduced giant resonances, Gamow-Teller Strength.
doi: 10.1016/0370-2693(88)90703-4
1987FR05 Phys.Rev. C35, 2236 (1987) D.Frekers, S.S.M.Wong, R.E.Azuma, T.E.Drake, J.D.King, R.Abegg, K.P.Jackson, C.A.Miller, S.Yen, W.P.Alford, R.L.Helmer, C.Broude, S.Mattsson, E.Rost Elastic and Inelastic Scattering of 362 MeV polarized Protons from 40Ca NUCLEAR REACTIONS 40Ca(polarized p, p), (polarized p, p'), E=362 MeV; measured σ(θ), analyzing power. Magnetic spectrometer. Model calculations.
doi: 10.1103/PhysRevC.35.2236
1987GR11 Phys.Rev. C35, 1341 (1987) R.E.L.Green, R.G.Korteling, J.M.D'Auria, K.P.Jackson, R.L.Helmer Light Fragment Spectra to Upper Kinematic Limits for 300 MeV Proton Reactions with Be and Ag NUCLEAR REACTIONS 9Be, Ag(p, X), E=190, 300 MeV; measured σ(fragment θ, E) for X=2,1H, 3,4He, 6He, 6,7Li, 7Be; deduced slope parameters, source velocities, statistical model limits. Rapidity analysis.
doi: 10.1103/PhysRevC.35.1341
1987HA11 Phys.Lett. 184B, 316 (1987) O.Hausser, K.Hicks, C.W.Glover, R.Abegg, A.Celler, C.Gunther, R.L.Helmer, R.Henderson, D.J.Horen, C.J.Horowitz, K.P.Jackson, J.Lisantti, D.K.McDaniels, C.A.Miller, R.Sawafta, L.W.Swenson Spin Observables for 208Pb(p(pol), p(pol)) Elastic Scattering at 290 MeV NUCLEAR REACTIONS 208Pb(polarized p, p), E=290 MeV; measured polarizations, transfer coefficients vs momentum transfer; deduced elastic scattering amplitudes, spin rotation parameters. Focal-plane polarimeter. Dirac calculations.
doi: 10.1016/0370-2693(87)90172-9
1987HE20 Nucl.Data Sheets 51, 1 (1987) Nuclear Data Sheets for A = 154 COMPILATION 154Nd, 154Pm, 154Sm, 154Eu, 154Gd, 154Tb, 154Dy, 154Ho, 154Er, 154Tm, 154Yb, 154Lu, 154Hf; compiled, evaluated structure data.
1987HE22 Can.J.Phys. 65, 588 (1987) The TRIUMF Charge-Exchange Facility NUCLEAR REACTIONS 1H, 7Li, 12C(p, n), 6Li, 12,13C(n, p), E ≈ 198 MeV; measured particle spectra, σ(θ). Charge exchange facility.
doi: 10.1139/p87-083
1987HE24 Nucl.Instrum.Methods Phys.Res. A257, 97 (1987) R.S.Henderson, W.P.Alford, D.Frekers, O.Hausser, R.L.Helmer, K.H.Hicks, K.P.Jackson, C.A.Miller, M.C.Vetterli, S.Yen A Segmented Target Chamber for (n, p) Studies at TRIUMF NUCLEAR REACTIONS 7Li, 12C(n, p), E=198 MeV; measured σ(Ep), σ(θp). Segmented target chamber.
doi: 10.1016/0168-9002(87)90728-5
1987HE28 Nucl.Phys. A474, 77 (1987) R.G.Helmer, M.A.Lee, C.W.Reich, I.Ahmad Intrinsic Reflection Asymmetry in 225Ra: Additional information from a study of the α-decay scheme of 229Th RADIOACTIVITY 229Th(α); measured E(α), I(α), E(γ), I(γ), αγ-, γγ-, γ(ce)-coin. 225Ra deduced levels, J, π, K.
doi: 10.1016/0375-9474(87)90195-3
1987MO04 Phys.Lett. 183B, 269 (1987) A.Moalem, D.Frekers, S.A.Gurvitz, R.Abegg, C.Davis, K.P.Jackson, C.A.Miller, R.S.Henderson, S.Yen, R.L.Helmer, K.H.Hicks, J.S.Wesick Inclusive Analyzing Power and Scattering Mechanisms in Proton-Nucleus Scattering at Backward Angles NUCLEAR REACTIONS 9Be, C(polarized p, p'), E=303 MeV; measured analyzing power (θ=120°); deduced scattering mechanism. ΔE-E telescopes.
doi: 10.1016/0370-2693(87)90961-0
Back to query form [Next] Note: The following list of authors and aliases matches the search parameter R.Helmer: , R.G.HELMER, R.L.HELMER |