NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = I.S.Towner Found 129 matches. Showing 1 to 100. [Next]2023SE01 Phys.Rev. C 107, 015502 (2023) N.Severijns, L.Hayen, V.De Leebeeck, S.Vanlangendonck, K.Bodek, D.Rozpedzik, I.S.Towner Ft values of the mirror β transitions and the weak-magnetism-induced current in allowed nuclear β decay RADIOACTIVITY 1n, 3H(β-); 11C, 13N, 15O, 17F, 19Ne, 21Na, 23Mg, 25Al, 27Si, 29P, 31S, 33Cl, 35Ar, 37K, 39Ca, 41Sc, 43Ti, 45V, 47Cr, 49Mn, 51Fe, 53Co, 55Ni, 57Cu, 59Zn, 61Ga, 63Ge, 65As, 67Se, 69Br, 71Kr, 73Rb, 75Sr, 77Y, 79Zr, 81Nb, 83Mo, 85Tc, 89Rh, 91Pd, 93Ag, 95Cd, 97In, 99Sn(EC), (β+); analyzed and evaluated measured half-lives for decays of all the listed nuclei, and ground-state branching ratios for decays of 1n to 75Sr, T=1/2 mirror β decays; deduced adopted T1/2, ground-state branching ratios for decays of 1n to 83Mo, except 69Br, 73Rb and 81Nb. 1n, 3H(β-); 11C, 13N, 15O, 17F, 19Ne, 21Na, 23Mg, 25Al, 27Si, 29P, 31S, 33Cl, 35Ar, 37K, 39Ca, 41Sc, 43Ti, 45V, 47Cr, 49Mn, 51Fe, 53Co, 55Ni, 57Cu, 59Zn, 61Ga, 67Se, 71Kr, 75Sr(EC), (β+); calculated quantities and relevant corrections leading to the Ft values for mirror β transitions, and compared with available experimental values; comparison of experimental and theoretical values for the Gamow-Teller matrix element (MGT) and the orbital current matrix element (ML) for mirror β transitions from 1n to 45V decays. 6He, 9Li, 12,13B, 14,15C, 16N, 19O, 20F, 23Ne, 24,24mNa, 28Al, 32Si(β-); 9,10C, 12N, 13,14O, 18F, 18Ne, 20,22Na, 22Mg, 24,24mAl, 26Si, 28,30P, 30S, 32Cl, 34Ar, 36K, 38Ca, 42Ti, 53Ni(EC), (β+); analyzed logft values and other data for β transitions for T=1, 3/2 and 2 multiplet states for radiative corrections; comparison of the experimental values for the MGT and ML, and the form factors with the theoretical values calculated using shell model. 1n, 3H, 6He, 8,9Li, 12B, 16N, 20F, 23,24Ne, 24,24mNa(β-); 8Be, 9,10,11C, 12,13N, 15O, 17,18F, 18,19Ne, 20,21Na, 23Mg, 24,24m,25Al, 27Si, 29,30P, 30,31S, 33Cl, 35Ar, 36,37K, 39Ca(EC), (β+); analyzed overview of values of experimental form factors for all ground-state to ground-state and ground-state to first-excited 2+ or 4+ state T=1 and 3/2 transitions with A<39, and comparison with theoretical shell model calculations. 6He, 9Li, 12,13B, 14,15C, 16N, 19O, 20F, 23Ne, 24,24mNa, 28Al, 32Si(β-); 9,10C, 12N, 13,14O, 18Ne, 18F, 20,22Na, 22Mg, 24,24mAl, 26Si, 28,30P, 30S, 32Cl, 34Ar, 36K, 38Ca, 42Ti, 53Ni(β+); analyzed decay schemes for T=1 and T=3/2 mirror β transitions. Update of the Ft values of the isospin T=1/2 mirror β decays determine the Vud quark-mixing matrix element, taking into account recoil terms, weak magnetism, for the mirror β decays and a large set of β decays in higher isospin multiplets. Relevance to reactor neutrino problem and reactor neutrino anomaly. NUCLEAR MOMENTS 1n, 1,3H, 3He, 11,13C, 11B, 13,15N, 15,17O, 17,19F, 19,21Ne, 21,23Na, 23,25Mg, 25,27Al, 27,29Si, 29,31P, 31,33S, 33,35Cl, 35,37Ar, 37,39K, 39,41Ca, 41,43Sc, 43,45Ti, 45,47V, 47,49Cr, 49,51Mn, 51,53Fe, 53,55Co, 55,57Ni, 57,59Cu, 59,61Zn, 61,63Ga, 67As, 67Se, 71Br, 71Kr, 75Rb, 75,77Sr; analyzed and evaluated measured magnetic dipole moments of T=1/2 mirror nuclei; deduced adopted values, and calculated magnetic moments for which no experimental data available; deduced conserved vector current (CVC) form factors, and compared with theoretical shell-model calculations.
doi: 10.1103/PhysRevC.107.015502
2020HA30 Phys.Rev. C 102, 045501 (2020) Superallowed O+ → O+ nuclear β decays: 2020 critical survey, with implications for Vud and CKM unitarity RADIOACTIVITY 10C, 14O, 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti, 46Cr, 50Fe, 54Ni, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb(β+), (EC); compiled and evaluated Q(ϵ), T1/2, β decay branching ratios, γ-intensity ratios for superallowed (0+ to 0+) β decays in Tz=-1 and 0 parent nuclei; deduced partial half-lives, ft and Ft for superallowed Fermi decays, Cabibbo-Kobayashi-Maskawa matrix Vud, upper limit on Fierz interference. Discussed CKM unitarity test.
doi: 10.1103/PhysRevC.102.045501
2020IA02 Phys.Rev. C 101, 045501 (2020) V.E.Iacob, J.C.Hardy, H.I.Park, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, A.Saastamoinen, I.S.Towner Precise β branching-ratio measurement for the 0+ → 0+ superallowed decay of 34Ar RADIOACTIVITY 34Ar(β+), (EC)[from 1H(35Cl, 2n), E=30 MeV/nucleon, followed by separation of fully stripped reaction ejectiles using the MARS spectrometer at the K500 superconducting cyclotron at Texas A and M University]; measured Eβ+, Iβ+, Eγ, Iγ, β+γ-coin. 34Cl; deduced levels, J, π, β-branching ratio, EC to β+ emission ratios, logft, superallowed 0+ to 0+ β transition, isospin-symmetry-breaking correction, ratios of ft values for the mirror pair of superallowed transitions 34Ar to 34Cl and 34Cl to 34S. Comparison with previous experimental data, and with shell model calculations with Woods-Saxon radial wave functions. Systematics of logft ratios in A=26, 34, 38 and 42 mirror pairs. Relevance to up-down quark-mixing element Vud of the Cabibbo-Kobayashi-Maskawa matrix.
doi: 10.1103/PhysRevC.101.045501
2020PA40 Phys.Rev. C 102, 045502 (2020) H.I.Park, J.C.Hardy, M.Bencomo, V.E.Iacob, I.S.Towner, K.T.Macon, W.P.Tan, M.Brodeur, A.Boeltzig, B.Frentz, S.L.Henderson, J.Long, S.McGuinness, O.Olivas-Gomez, P.O'Malley, G.Seymour, B.Vande Kolk, A.Kayani Intensity of a weak 519-keV γ ray following β decay of the superallowed emitter 34Ar determined via the 33S(p, γ)34Cl reaction NUCLEAR REACTIONS 33S(p, γ)34Cl, E=1072 keV; measured Eγ, Iγ, and γγ-coin using GEORGINA array of five Ge detectors at the Pelletron accelerator of University of Notre Dame. 34Cl; deduced γ-branching ratios from the 666-keV level, in particular for the 519-keV γ ray following β+ decay of the superallowed emitter 34Ar. Comparison of the branching ratios with previous experimental results, and theoretical calculations.
doi: 10.1103/PhysRevC.102.045502
2019BE23 Phys.Rev. C 100, 015503 (2019) M.Bencomo, J.C.Hardy, V.E.Iacob, H.I.Park, L.Chen, V.Horvat, N.Nica, B.T.Roeder, A.Saastamoinen, I.S.Towner Precise branching ratio measurement for the superallowed β+ decay of 26Si: Completion of a second mirror pair RADIOACTIVITY 26Si(β+), (EC)[from 1H(27Al, 2n), E=30 MeV/nucleon from the Texas A and M University K500 superconducting cyclotron, followed by analysis of reaction products by MARS system according to A/Q ratio]; measured β+ particles, Eγ, Iγ, β+γ-coin using plastic scintillator for β+ detection and HPGe detector for γ detection. 26Al; deduced levels, β++ϵ branching ratios, Gamow-Teller branches, superallowed (0+ to 0+) decay branch, logft, Ft. Comparison with sd shell-model calculations using USD, USD-A, and USD-B effective interactions. Discussed relevance to determination of up-down Vud quark-mixing element of the Cabibbo-Kobayashi-Maskawa matrix.
doi: 10.1103/PhysRevC.100.015503
2018GA22 Acta Phys.Pol. B49, 229 (2018) P.E.Garrett, K.G.Leach, A.D.MacLean, G.C.Ball, P.C.Bender, V.Bildstein, B.A.Brown, C.Burbadge, A.Diaz Varela, R.Dunlop, T.Faestermann, B.Hadinia, R.Hertenberger, J.D.Holt, A.T.Laffoley, D.S.Jamieson, B.Jigmeddorj, A.J.Radich, E.T.Rand, S.R.Stroberg, C.E.Svensson, I.S.Towner, S.Triambak, H.-F.Wirth Nuclear Structure Studied with Direct Reactions for Fundamental Symmetry Tests NUCLEAR REACTIONS 52Cr(p, t)50Cr;64Zn(p, t)62Zn, E=24 MeV; measured reaction products momenta using Q3D magnetic spectrograph, Eγ, Iγ, γγ-coin; deduced peaks in triton spectra, σ(θ) vs θcm for reactions to given final states, angular correlation measurement of 1389-954 keV cascade in 62Zn following the β+/EC decay of 62Ga (preliminary).
doi: 10.5506/APhysPolB.49.229
2016LE10 Phys.Rev. C 94, 011304 (2016) K.G.Leach, P.E.Garrett, G.C.Ball, P.C.Bender, V.Bildstein, B.A.Brown, C.Burbadge, T.Faestermann, B.Hadinia, J.D.Holt, A.T.Laffoley, D.S.Jamieson, B.Jigmeddorj, A.J.Radich, E.T.Rand, S.R.Stroberg, C.E.Svensson, I.S.Towner, H.-F.Wirth Searching for 0+ states in 50Cr: Implications for the superallowed β decay of 50Mn NUCLEAR REACTIONS 52Cr(p, t), E=24 MeV; measured E(t), I(t), σ(θ) using Q3D magnetic spectrograph at MLL-Munich. 50Cr; deduced levels, J, π, L-transfers, 0+ states. Coupled-channel, finite-range DWBA analysis using software FRESCO code. Comparison with ab initio shell-model predictions using in-medium similarity renormalization group (IM-SRG) formalism based on NN and 3N forces from chiral-energy density functionals (EFT).Comparison with previous experimental results and evaluated data in the ENSDF database. RADIOACTIVITY 50Mn(EC); discussed possible Fermi non-analog β transitions to 0+ states at 3895 and 4069 keV assigned in authors' (p, t) work.
doi: 10.1103/PhysRevC.94.011304
2015HA07 Phys.Rev. C 91, 025501 (2015) Superallowed 0+ → 0+ nuclear β decays: 2014 critical survey, with precise results for Vud and CKM unitarity RADIOACTIVITY 10C, 14O, 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb(β+), (EC); compiled and evaluated Q(ϵ), T1/2, branching ratios, γ-intensity ratios for superallowed (0+ to 0+) β transitions in Tz=-1 and 0 parent nuclei; deduced partial half-lives, ft, Ft, Vud, and δ'R, δNS, δC1, δC2, δC isospin symmetry breaking terms. Comparison with theoretical δC values from SM-WS (shell-model, Woods-Saxon), SM-HF (shell-model, Hartree-Fock), RPA (random phase approximation), IVMR (isovector monopole resonance), and DFT (density functional theory). Discussed CKM unitarity test, and Vus, Vab and Vu terms.
doi: 10.1103/PhysRevC.91.025501
2015PA32 Phys.Rev. C 92, 015502 (2015) H.I.Park, J.C.Hardy, V.E.Iacob, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, E.McCleskey, R.E.Tribble, I.S.Towner Precise measurement of branching ratios in the β decay of 38Ca RADIOACTIVITY 38Ca(β+), (EC)[from 1H(39K, 2n), E=30 MeV/nucleon]; measured fully-stripped reaction ejectiles using Momentum Achromat Recoil Spectrometer (MARS) at Texas A and M cyclotron facility, Eβ, Iβ, Eγ, Iγ, β+γ-coin. 38K; deduced levels, J, π, β+ branching ratios, logft values, branching ratio and Ft value for superallowed β transition, the up-down quark-mixing element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix Vud. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.92.015502
2015TO02 Phys.Rev. C 91, 015501 (2015) Parametrization of the statistical rate function for select superallowed transitions RADIOACTIVITY 10C, 14O, 18Ne, 22Mg, 26Si, 26mAl, 30S, 34Ar, 34Cl, 38mK, 38Ca, 42Ti, 42Sc, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb(β+), (EC); 11C, 13N, 15O, 17F, 19Ne, 21Na, 23Mg, 25Al, 27Si, 29P, 31S, 33Cl, 35Ar, 37K, 39Ca, 41Sc, 43Ti, 45V(β+), (EC); analyzed parametrizations of the statistical rate functions for 20 superallowed 0+ to 0+ β transitions between T=1 analog states, and for 18 superallowed mirror transitions between analog T=1/2 states. Application to determining Vud and testing CKM unitarity.
doi: 10.1103/PhysRevC.91.015501
2015TO16 Phys.Rev. C 92, 055505 (2015) Theoretical corrections and world data for the superallowed ft values in the β decays of 42Ti, 46Cr, 50Fe, and 54Ni RADIOACTIVITY 42Ti, 46Cr, 50Fe, 54Ni(β+), (EC); compiled, reviewed and evaluated experimental data for half-lives and β branching ratios; calculated Ft values, radiative and isospin-symmetry breaking corrections for the superallowed 0+ to 0+ Fermi transitions for Tz=-1 nuclei, and for similar data for the superallowed 0+ to 0+ β transitions in the β+, EC decay of daughter and mirror nuclides of 42Sc, 46V, 50Mn, 54Co with Tz=0; deduced parametrization for precise calculation of f values for the new superallowed transitions. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.92.055505
2014HA08 Appl.Radiat.Isot. 87, 297 (2014) J.C.Hardy, V.E.Iacob, H.I.Park, L.Chen, N.Nica, V.Horvat, R.E.Tribble, I.S.Towner FT values measured to ±0.1 percent for superallowed beta transitions: Metrology at sub-second time scales RADIOACTIVITY 10C, 14O, 22Mg, 26Al, 34Cl, 34Ar, 38K, 42Sc, 46V, 50Mn, 54Co, 62Ga, 74Rb(EC); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced log ft, T1/2 and their uncertainties. Comparison with theoretical calculations.
doi: 10.1016/j.apradiso.2013.11.018
2014PA09 Phys.Rev.Lett. 112, 102502 (2014) H.I.Park, J.C.Hardy, V.E.Iacob, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, E.Simmons, R.E.Tribble, I.S.Towner β Decay of 38Ca: Sensitive test of Isospin Symmetry-Breaking Corrections from Mirror Superallowed 0+ → 0+ Transitions RADIOACTIVITY 38Ca, 38K(β+) [from 1H(39K, 2n)38Ca, E=30 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced branching ratio, high-precision log ft value. Test of the isospin symmetry-breaking corrections, comparison with available data.
doi: 10.1103/PhysRevLett.112.102502
2014SO16 Phys.Rev. C 90, 035502 (2014) G.Soti, F.Wauters, M.Breitenfeldt, P.Finlay, P.Herzog, A.Knecht, U.Koster, I.S.Kraev, T.Porobic, P.N.Prashanth, I.S.Towner, C.Tramm, D.Zakoucky, N.Severijns Measurement of the β-asymmetry parameter of 67Cu in search for tensor-type currents in the weak interaction RADIOACTIVITY 67,68,68mCu(β-)[from U(p, X), E=1.4 GeV, followed by fragment separation by RILIS and GPS at CERN-ISOLDE]; measured Eβ, Iβ, β(θ, H, temp) by using nuclear implantation into Cold On-Line Equipment (NICOLE) 3He-4He dilution refrigerator; deduced β-asymmetry parameter for 67Cu decay and constraints on tensor coupling constants, nuclear matrix elements. Technique of LTNO used in combination with GEANT4-based Monte Carlo simulations. Comparisons with previous experimental measurements, and with predictions of standard model.
doi: 10.1103/PhysRevC.90.035502
2013DU14 Phys.Rev. C 88, 045501 (2013) R.Dunlop, G.C.Ball, J.R.Leslie, C.E.Svensson, I.S.Towner, C.Andreoiu, S.Chagnon-Lessard, A.Chester, D.S.Cross, P.Finlay, A.B.Garnsworthy, P.E.Garrett, J.Glister, G.Hackman, B.Hadinia, K.G.Leach, E.T.Rand, K.Starosta, E.R.Tardiff, S.Triambak, S.J.Williams, J.Wong, S.W.Yates, E.F.Zganjar High-precision branching-ratio measurement for the superallowed Β+ emitter 74Rb RADIOACTIVITY 74Rb(β+), (EC)[from Nb(p, X, ), E=500 MeV]; measured Eγ, Iγ, Eβ, Iβ, ce, γγ-, γ(ce)-, βγ-, β(ce)-coin using 8π array for γ rays, SCEPTAR for β particles and PACES for conversion electrons at ISAC-TRIUMF facility. 74Kr; deduced levels, J, π, conversion coefficients, multipolarity, E0 transition, branching ratio for superallowed β transition, logft, GT+F, isospin-symmetry breaking terms. Comparison of experimental GT values with theoretical values.
doi: 10.1103/PhysRevC.88.045501
2013LE19 Phys.Rev. C 87, 064306 (2013); Pub.Note Phys.Rev. C 87, 069904 (2013) K.G.Leach, P.E.Garrett, I.S.Towner, G.C.Ball, V.Bildstein, B.A.Brown, G.A.Demand, T.Faestermann, P.Finlay, K.L.Green, R.Hertenberger, R.Krucken, A.A.Phillips, E.T.Rand, C.S.Sumithrarachchi, C.E.Svensson, S.Triambak, H.-F.Wirth, J.Wong Experimental 64Zn((d-pol), t)63Zn spectroscopic factors: Guidance for isospin-symmetry-breaking calculations NUCLEAR REACTIONS 64Zn(polarized d, t), E=22 MeV; measured triton spectra, σ(θ) and vector analyzing powers using Q3D magnetic spectrograph at MLL, Munich facility. DWBA analyses using several optical model parameters. 63Zn; deduced levels, L-transfers, J, π, spectroscopic factors. Comparison with shell-model calculations with GXPF1A interaction. Comparison with experimental and theoretical spectroscopic factors for 62Zn(d, t)61Zn reaction. Discussed implications for isospin symmetry breaking (ISB) calculations for 62Ga to 62Zn superallowed β decay.
doi: 10.1103/PhysRevC.87.064306
2013LE25 Phys.Rev. C 88, 031306 (2013) K.G.Leach, P.E.Garrett, C.E.Svensson, I.S.Towner, G.C.Ball, V.Bildstein, B.A.Brown, A.Diaz Varela, R.Dunlop, T.Faestermann, R.Hertenberger, D.J.Jamieson, R.Krucken, S.Triambak, H.-F.Wirth Excited O+ states in 62Zn populated via the 64Zn(p, t)62Zn reaction NUCLEAR REACTIONS 64Zn(p, t), E=24 MeV; measured triton spectra, σ(θ) using Q3D magnetic spectrograph at MLL-Munich facility. DWBA analysis of σ(θ) data. 62Zn; deduced levels, J, π, l-transfer, excited 0+ states. Comparison with shell-model calculations using MSDI3, GXPF1 and GXPF1A interactions. Discussed impact on isospin-symmetry-breaking (ISB) correction for 62Ga superallowed due to shift in the first excited 0+ state in 62Zn.
doi: 10.1103/PhysRevC.88.031306
2012HA46 J.Phys.:Conf.Ser. 387, 012006 (2012) Superallowed 0+ → 0+ beta-decay from Tz = -1 sd-shell nuclei RADIOACTIVITY 34Ar(β+), (EC)[from 1H(35Cl, 2n)]; measured positron β decay, Eγ, Iγ, (e+)γ-coin. 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti(EC), (β+); calculated superallowed 0+ TO 0+ transitions from TZ=-1 parent nuclei branching ratios.
doi: 10.1088/1742-6596/387/1/012006
2012KN01 Phys.Rev.Lett. 108, 122502 (2012) A.Knecht, R.Hong, D.W.Zumwalt, B.G.Delbridge, A.Garcia, P.Muller, H.E.Swanson, I.S.Towner, S.Utsuno, W.Williams, C.Wrede Precision Measurement of the 6He Half-Life and the Weak Axial Current in Nuclei RADIOACTIVITY 6He(β-) [from 7Li(d, 3He)6He, E=5.8 MeV]; measured decay products, Eβ, Iβ; deduced T1/2, log ft, Gamow-Teller matrix element. Comparison with ab initio calculations.
doi: 10.1103/PhysRevLett.108.122502
2012KN02 Phys.Rev. C 86, 035506 (2012) A.Knecht, R.Hong, D.W.Zumwalt, B.G.Delbridge, A.Garcia, P.Muller, H.E.Swanson, I.S.Towner, S.Utsuno, W.Williams, C.Wrede Precision measurement of the 6He half-life and the weak axial current in nuclei RADIOACTIVITY 6He[from 7Li(d, 3He), E=18 MeV](β-); measured Iβ, ββ-coin, T1/2; deduced ft value, Gamow-Teller matrix element. Comparison with ab-initio calculations, and with previous half-life measurements.
doi: 10.1103/PhysRevC.86.035506
2012ME03 Phys.Rev. C 85, 025501 (2012) D.Melconian, S.Triambak, C.Bordeanu, A.Garcia, J.C.Hardy, V.E.Iacob, N.Nica, H.I.Park, G.Tabacaru, L.Trache, I.S.Towner, R.E.Tribble, Y.Zhai β decay of 32Cl: Precision γ-ray spectroscopy and a measurement of isospin-symmetry breaking RADIOACTIVITY 32Cl(β+), (EC)[20 MeV/nucleon 32Cl secondary beam from 1H(32S, n), E AP 24.8 MeV/nucleon primary reaction using MARS facility]; measured particle spectra, Eγ, Iγ, β, βγ-coin, half-life; deduced mass excess, Q(EC). 32S; deduced levels, J, π, isospin, β branches, logft, Gamow-Teller matrix elements, isospin-symmetry-breaking correction for superallowed transition. Comparison with earlier studies and shell-model calculation. 30S, 32Cl(β+); measured half-lives from γ-decay curves.
doi: 10.1103/PhysRevC.85.025501
2012OH01 Phys.Rev.Lett. 109, 032504 (2012) T.Ohtsubo, N.J.Stone, J.R.Stone, I.S.Towner, C.R.Bingham, C.Gaulard, U.Koster, S.Muto, J.Nikolov, K.Nishimura, G.S.Simpson, G.Soti, M.Veskovic, W.B.Walters, F.Wauters Magnetic Dipole Moment of the Doubly-Closed-Shell Plus One Proton Nucleus 49Sc NUCLEAR MOMENTS 49Sc; measured hyperfine field, β asymmetry; deduced magnetic dipole moment. Comparison with available data. NUCLEAR STRUCTURE 41,49Sc; calculated magnetic dipole moment.
doi: 10.1103/PhysRevLett.109.032504
2011LE47 J.Phys.:Conf.Ser. 312, 092036 (2011) K.G.Leach, P.E.Garrett, G.C.Ball, J.C.Bangay, L.Bianco, G.A.Demand, T.Faestermann, P.Finlay, K.L.Green, R.Hertenberger, R.Kriicken, A.A.Phillips, E.T.Rand, C.S.Sumithrarachchi, C.E.Svensson, I.S.Towner, S.Triambak, H.-F.Wirth, J.Wong Experimental Guidance of ISB Corrections via Direct Nuclear Reactions NUCLEAR REACTIONS 64Zn(polarized d, d), (polarized d, t), E=22 MeV; measured Ep, Ip(θ), E(triton), I(triton, θ) using Q3D magnetic spectrograph; deduced elastic scattering σ(θ), vector analyzing power; calculated elastic scattering σ(θ), vector analyzing power using DWBA with isospin-symmetry breaking corrections and deuteron parameters from literature.
doi: 10.1088/1742-6596/312/9/092036
2011ME15 Phys.Rev.Lett. 107, 182301 (2011) D.Melconian, S.Triambak, C.Bordeanu, A.Garcia, J.C.Hardy, V.E.Iacob, N.Nica, H.I.Park, G.Tabacaru, L.Trache, I.S.Towner, R.E.Tribble, Y.Zhai Experimental Validation of the Largest Calculated Isospin-Symmetry-Breaking Effect in a Superallowed Fermi Decay RADIOACTIVITY 32Cl(EC); measured decay products, Eγ, Iγ; deduced γ yield to its isobaric-analogue branch, log ft, large isospin-symmetry breaking. Comparison with shell model calculations.
doi: 10.1103/PhysRevLett.107.182301
2010HA34 Nucl.Phys. A844, 138c (2010) Superallowed nuclear β decay: symmetry breaking, CVC and CKM unitarity
doi: 10.1016/j.nuclphysa.2010.05.024
2010TO12 Phys.Rev. C 82, 065501 (2010) Comparative tests of isospin-symmetry-breaking corrections to superallowed 0+ → 0+ nuclear β decay NUCLEAR STRUCTURE 10C, 14O, 22Mg, 26Al, 34Cl, 34Ar, 38K, 42Sc, 46V, 50Mn, 54Co, 62Ga, 74Rb(β+); analyzed isospin-symmetry-breaking correction for superallowed 0+ to 0+ β transitions using shell model with Saxon-Woods radial wave functions.
doi: 10.1103/PhysRevC.82.065501
2010WA40 Phys.Rev. C 82, 055502 (2010) F.Wauters, I.Kraev, D.Zakoucky, M.Beck, M.Breitenfeldt, V.De Leebeeck, V.V.Golovko, V.Yu.Kozlov, T.Phalet, S.Roccia, G.Soti, M.Tandecki, I.S.Towner, E.Traykov, S.Van Gorp, N.Severijns Precision measurements of the 60Co β-asymmetry parameter in search for tensor currents in weak interactions RADIOACTIVITY 60Co(β-); measured E(β), I(β), γ(θ), β asymmetry parameter using a polarized 60Co source with low-temperature nuclear orientation method. 57Co, 54Mn(EC); measured γ(θ) and used as references for temperature measurement. Systematics of β-asymmetry parameters for Gamow-Teller transitions and for T=1/2 mirror nuclei. Tensor currents in weak interactions.
doi: 10.1103/PhysRevC.82.055502
2009BE22 Phys.Rev. C 79, 064305 (2009) J.S.Berryman, K.Minamisono, W.F.Rogers, B.A.Brown, H.L.Crawford, G.F.Grinyer, P.F.Mantica, J.B.Stoker, I.S.Towner Doubly-magic nature of 56Ni: Measurement of the ground state nuclear magnetic dipole moment of 55Ni RADIOACTIVITY 55Ni(β+)[from 9Be(58Ni, X), E=160 MeV/nucleon];measured β asymmetry from spin polarized 55Ni ions, deduced g-factor. NUCLEAR MOMENTS 55Ni; measured g-factor by β-NMR method; deduced magnetic moment. 55Ni, 55Co; comparison of measured magnetic moments with shell-model calculations in full fp shell using GXPF1 interaction.
doi: 10.1103/PhysRevC.79.064305
2009HA12 Phys.Rev. C 79, 055502 (2009) Superallowed 0+ → 0+ nuclear Β decays: A new survey with precision tests of the conserved vector current hypothesis and the standard model RADIOACTIVITY 10C, 14O, 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb(EC), (β+); analyzed Q values, half-lives and branching ratios; deduced statistical rate function (Ft). Precision test of conserved vector current hypothesis and the standard model.
doi: 10.1103/PhysRevC.79.055502
2009HA16 Acta Phys.Pol. B40, 675 (2009) Superallowed Beta Decay: the Role of Nuclear Structure in Standard-Model Tests
2008FI07 Phys.Rev. C 78, 025502 (2008) P.Finlay, G.C.Ball, J.R.Leslie, C.E.Svensson, I.S.Towner, R.A.E.Austin, D.Bandyopadhyay, A.Chaffey, R.S.Chakrawarthy, P.E.Garrett, G.F.Grinyer, G.Hackman, B.Hyland, R.Kanungo, K.G.Leach, C.M.Mattoon, A.C.Morton, C.J.Pearson, A.A.Phillips, J.J.Ressler, F.Sarazin, H.Savajols, M.A.Schumaker, J.Wong High-precision branching ratio measurement for the superallowed β+ emitter 62Ga RADIOACTIVITY 62Ga(β+); measured Eγ, Iγ, Eβ, βγ-coin, branching ratios; deduced ft values. 62Zn; deduced levels, J, π. 10C, 14O, 22Mg, 26mAl, 34Cl, 34Ar, 38mK, 42Sc, 46V, 50Mn, 54Co, 62Ga, 74Rb; systematics of superallowed β decays and ft values.
doi: 10.1103/PhysRevC.78.025502
2008SE10 Phys.Rev. C 78, 055501 (2008) N.Severijns, M.Tandecki, T.Phalet, I.S.Towner Ft values of the T = 1/2 mirror β transitions RADIOACTIVITY 3H, 11C, 13N, 15O, 17F, 19Ne, 21Na, 23Mg, 25Al, 27Si, 29P, 31S, 33Cl, 35Ar, 37K, 39Ca, 41Sc, 43Ti, 45V, 47Cr, 49Mn, 51Fe, 53Co, 57Cu, 59Zn, 61Ga, 71Kr, 75Sr, 55Ni, 63Ge, 65As, 67Se, 77Y, 79Zr, 83Mo(EC), (β+); analyzed half-lives, branching ratios, electron-capture probabilities; deduced ft values, correlation coefficients.
doi: 10.1103/PhysRevC.78.055501
2008TO03 Phys.Rev. C 77, 025501 (2008) Improved calculation of the isospin-symmetry-breaking corrections to superallowed Fermi β decay NUCLEAR REACTIONS 46Ti(3He, α), E not given; analyzed spectroscopic factors. RADIOACTIVITY 10C, 14O, 22Mg, 26,26mAl, 34Ar, 34Cl, 38,38mK, 42Sc, 46V, 50Mn, 54Co, 62Ga, 74Rb; calculated isotopic mixing correction; analyzed ft values for superallowed β decay. 26Si, 30S, 38Ca, 42Ti, 66As, 70Br; calculated isospin mixing correction.
doi: 10.1103/PhysRevC.77.025501
2007ZG01 Acta Phys.Pol. B38, 1179 (2007) E.F.Zganjar, T.Achtzehn, D.Albers, C.Andreoiu, A.N.Andreyev, R.A.E.Austin, G.C.Ball, J.A.Behr, G.C.Biosvert, P.Bricault, S.Bishop, R.S.Chakrawarthy, R.Churchman, D.Cross, E.Cunningham, J.M.D'Auria, M.Dombsky, P.Finlay, P.E.Garrett, G.F.Grinyer, G.Hackman, V.Hanemaayer, J.C.Hardy, D.F.Hodgson, B.Hyland, V.Iacob, P.Klages, K.A.Koopmans, W.D.Kulp, J.Lassen, J.P.Lavoie, J.R.Leslie, T.Linder, J.A.Macdonald, H.-B.Mak, D.Melconian, A.C.Morton, W.E.Ormand, C.J.Osborne, C.J.Pearson, M.R.Pearson, A.A.Phillips, A.Piechaczek, J.Ressler, F.Sarazin, G.Savard, M.A.Schumaker, H.C.Scraggs, C.E.Svensson, J.J.Valiente-Dobon, I.S.Towner, J.C.Waddington, P.M.Walker, K.Wendt, J.L.Wood Superallowed Beta Decay Studies at TRIUMF - Nuclear Structure and Fundamental Symmetries
2006HA61 Int.J. Mass Spectrom. 251, 95 (2006) J.C.Hardy, I.S.Towner, G.Savard Mass measurements and superallowed β decay NUCLEAR REACTIONS 24,25Mg(n, γ), E not given; 25Mg(p, γ), E not given; 26Mg, 27Al(p, γ), E not given; analyzed Q values and mass excess. ATOMIC MASSES 46V, 46Ti, 26Al; reviewed masses. 24,26Mg, 26Al, 28Si; analyzed and evaluated masses. Comparison with Penning Trap measurements.
doi: 10.1016/j.ijms.2005.12.052
2006HY02 Phys.Rev.Lett. 97, 102501 (2006) B.Hyland, C.E.Svensson, G.C.Ball, J.R.Leslie, T.Achtzehn, D.Albers, C.Andreoiu, P.Bricault, R.Churchman, D.Cross, M.Dombsky, P.Finlay, P.E.Garrett, C.Geppert, G.F.Grinyer, G.Hackman, V.Hanemaayer, J.Lassen, J.P.Lavoie, D.Melconian, A.C.Morton, C.J.Pearson, M.R.Pearson, A.A.Phillips, M.A.Schumaker, M.B.Smith, I.S.Towner, J.J.Valiente-Dobon, K.Wendt, E.F.Zganjar Precision Branching Ratio Measurement for the Superallowed β+ Emitter 62Ga and Isospin-Symmetry-Breaking Corrections in A ≥ 62 Nuclei RADIOACTIVITY 62Ga(β+) [from Zr(p, X)]; measured Eγ, Iγ, βγ-coin; deduced superallowed Fermi branching ratio, ft. 62Zn deduced levels, J, π. Comparison with model predictions.
doi: 10.1103/PhysRevLett.97.102501
2006IA02 Phys.Rev. C 74, 015501 (2006); Erratum Phys.Rev. C 74, 029901 (2006) V.E.Iacob, J.C.Hardy, C.A.Gagliardi, J.Goodwin, N.Nica, H.I.Park, G.Tabacaru, L.Trache, R.E.Tribble, Y.Zhai, I.S.Towner Branching ratios for the β decay of 21Na RADIOACTIVITY 21Na(β+) [from 1H(22Ne, 2n)]; measured Eγ, Eγ, βγ-coin; deduced branching ratios. Implication for standard model test discussed.
doi: 10.1103/PhysRevC.74.015501
2005BR12 Phys.Rev. C 71, 044317 (2005); Erratum Phys.Rev. C 72, 029901 (2005) B.A.Brown, N.J.Stone, J.R.Stone, I.S.Towner, M.Hjorth-Jensen Magnetic moments of the 2+1 states around 132Sn NUCLEAR STRUCTURE 130Sn, 132Sb, 132,134Te; calculated levels, J, π. 124,126,128,130,134Sn, 130,132,134,136Te, 134,136,138Xe, 138Ba; calculated g factors, μ. Shell model, comparisons with data.
doi: 10.1103/PhysRevC.71.044317
2005HA08 Phys.Rev.Lett. 94, 092502 (2005) New Limits on Fundamental Weak-Interaction Parameters from Superallowed β Decay RADIOACTIVITY 10C, 14O, 22Mg, 26mAl, 34Cl, 34Ar, 38mK, 42Sc, 46V, 50Mn, 54Co, 74Rb; analyzed superallowed β-decay data; deduced limits on weak-interaction parameters.
doi: 10.1103/PhysRevLett.94.092502
2005HA27 Phys.Rev. C 71, 055501 (2005) Superallowed 0+ → 0+ nuclear β decays: A critical survey with tests of the conserved vector current hypothesis and the standard model RADIOACTIVITY 10C, 14O, 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb; compiled, analyzed superallowed β-decay decay Q(EC), T1/2, ft, branching ratios; deduced limits on weak-interaction parameters.
doi: 10.1103/PhysRevC.71.055501
2005HA65 Eur.Phys.J. A 25, Supplement 1, 695 (2005) Superallowed 0+ → 0+ β decay and CKM unitarity: A new overview including more exotic nuclei RADIOACTIVITY 10C, 14O, 18Ne, 22Mg, 26mAl, 26Si, 30S, 34Cl, 34Ar, 38mK, 38Ca, 42Sc, 42Ti, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb(EC); analyzed superallowed decays log ft, related data; deduced limits on weak interaction parameters.
doi: 10.1140/epjad/i2005-06-109-x
2005TO21 Phys.Rev. C 72, 055501 (2005) New analysis of 14O β decay: Branching ratios and conserved vector current consistency RADIOACTIVITY 14O(β+); analyzed spectrum; deduced branching ratio for Gamow-Teller transition. 14C(β-); analyzed T1/2. Implication for conserved vector current hypothesis discussed.
doi: 10.1103/PhysRevC.72.055501
2004GO39 Phys.Rev. C 70, 014312 (2004) V.V.Golovko, I.Kraev, T.Phalet, N.Severijns, B.Delaure, M.Beck, V.Kozlov, A.Lindroth, S.Versyck, D.Zakoucky, D.Venos, D.Srnka, M.Honusek, P.Herzog, C.Tramm, U.Koster, I.S.Towner Nuclear magnetic moment of 59Cu with on-line β-NMR on oriented nuclei RADIOACTIVITY 59Cu(β+); measured Eβ, Iβ(θ, H), NMR spectrum from low-temperature oriented source. 59Cu deduced μ. Comparison with model predictions.
doi: 10.1103/PhysRevC.70.014312
2004SA53 Phys.Rev. C 70, 042501 (2004) G.Savard, J.A.Clark, F.Buchinger, J.E.Crawford, S.Gulick, J.C.Hardy, A.A.Hecht, V.E.Iacob, J.K.P.Lee, A.F.Levand, B.F.Lundgren, N.D.Scielzo, K.S.Sharma, I.Tanihata, I.S.Towner, W.Trimble, J.C.Wang, Y.Wang, Z.Zhou Q value of the superallowed decay of 22Mg and the calibration of the 21Na(p, γ) experiment ATOMIC MASSES 18O, 22Mg, 22Na; measured masses. 22Mg deduced Q(EC), ft. Penning trap spectrometer.
doi: 10.1103/PhysRevC.70.042501
2003ME08 Nucl.Instrum.Methods Phys.Res. B204, 540 (2003) D.Melconian, D.Ashery, G.Ball, J.A.Behr, P.Bricault, B.A.Brown, M.Dombsky, K.P.Jackson, S.Fostner, A.Gorelov, M.N.Groves, S.Gu, M.R.Pearson, I.S.Towner, M.Trinczek, I.Vollrath Measuring isospin mixing in 36Ar using a polarized, neutral atom trap RADIOACTIVITY 37K(EC); measured β-asymmetry from polarized source. Optical pumping, application to planned experiment discussed.
doi: 10.1016/S0168-583X(02)02129-8
2003PI08 Phys.Rev. C 67, 051305 (2003) A.Piechaczek, E.F.Zganjar, G.C.Ball, P.Bricault, J.M.D'Auria, J.C.Hardy, D.F.Hodgson, V.Iacob, P.Klages, W.D.Kulp, J.R.Leslie, M.Lipoglavsek, J.A.Macdonald, H.-B.Mak, D.M.Moltz, G.Savard, J.von Schwarzenberg, C.E.Svensson, I.S.Towner, J.L.Wood High precision branching ratio measurement for the superallowed β decay of 74Rb: A prerequisite for exacting tests of the standard model RADIOACTIVITY 74Rb(EC) [from Nb(p, X)]; measured Eγ, Iγ, E(ce), I(ce); deduced analog transition branching ratio, QEC. 74Kr deduced levels, transitions.
doi: 10.1103/PhysRevC.67.051305
2003TO29 J.Phys.(London) G29, 197 (2003) The evaluation of Vud, experiment and theory RADIOACTIVITY 10C, 14O, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co(EC); 1n(β-); compiled, analyzed superallowed decays Q-values, T1/2, log ft, related data; deduced Vud matrix element.
doi: 10.1088/0954-3899/29/1/321
2002HA27 Phys.Rev.Lett. 88, 252501 (2002) Superallowed Beta Decay of Nuclei with A ≥ 62: The limiting effect of weak Gamow-Teller branches RADIOACTIVITY 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb(EC); calculated Gamow-Teller branching fractions; deduced implications for superallowed decay measurements.
doi: 10.1103/PhysRevLett.88.252501
2002HA47 Eur.Phys.J. A 15, 223 (2002) Superallowed 0+ → 0+ beta-decay and CKM unitarity: Recent results and future prospects RADIOACTIVITY 10C, 14O, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co(EC); analyzed superallowed decay log ft. Implication for unitarity test discussed.
doi: 10.1140/epja/i2001-10258-0
2002TO19 Phys.Rev. C66, 035501 (2002) Calculated Corrections to Superallowed Fermi β Decay: New evaluation of the nuclear-structure-dependent terms NUCLEAR STRUCTURE 10C, 14O, 18Ne, 22Mg, 26mAl, 26Si, 30S, 34Cl, 34Ar, 38mK, 38Ca, 42Sc, 42Ti, 46V, 50Mn, 54Co, 62Ga, 66As, 70Br, 74Rb; calculated radiative and isospin symmetry-breaking corrections to ft values in superallowed Fermi β decay.
doi: 10.1103/PhysRevC.66.035501
2002ZG01 Eur.Phys.J. A 15, 229 (2002) E.F.Zganjar, A.Piechaczek, G.C.Ball, P.Bricault, J.M.D'Auria, J.C.Hardy, D.F.Hodgson, V.Iacob, P.Klages, W.D.Kulp, J.R.Leslie, M.Lipoglavsek, J.A.Macdonald, H.B.Mak, D.M.Moltz, G.Savard, J.von Schwarzenberg, C.E.Svensson, I.S.Towner, J.L.Wood Tests of the standard model from superallowed Fermi β-decay studies: The 74Rb β-decay RADIOACTIVITY 74Rb(β+), (EC) [from Nb(p, X)]; measured Eγ, Iγ, E(ce), I(ce), βγ-, β(ce)-coin; deduced branching ratios. 74Kr deduced levels, transition intensities. Implications for standard model test discussed.
doi: 10.1140/epja/i2001-10259-y
2001BA12 Phys.Rev.Lett. 86, 1454 (2001) G.C.Ball, S.Bishop, J.A.Behr, G.C.Boisvert, P.Bricault, J.Cerny, J.M.D'Auria, M.Dombsky, J.C.Hardy, V.Iacob, J.R.Leslie, T.Lindner, J.A.Macdonald, H.-B.Mak, D.M.Moltz, J.Powell, G.Savard, I.S.Towner Precise Half-Life Measurement for the Superallowed 0+ → 0+ β Emitter 74Rb: First results from the new radioactive beam facility (ISAC) at TRIUMF RADIOACTIVITY 74Rb(β+) [from Nb(p, X)]; measured superallowed decay T1/2.
doi: 10.1103/PhysRevLett.86.1454
2001HA65 Hyperfine Interactions 132, 115 (2001) Standard-Model Tests with Superallowed β-Decay: An important application of very precise mass measurements
doi: 10.1023/A:1011999930767
2000HA17 Phys.Rev. C61, 044603 (2000) Shell-Model Calculations of Neutrino Scattering from 12C NUCLEAR REACTIONS 12C(ν, μ-), (ν, e), (μ-, X), (γ, X), E not given; calculated σ. Shell model, comparisons with data.
doi: 10.1103/PhysRevC.61.044603
2000RI14 Phys.Rev.Lett. 85, 1392 (2000) J.Rikovska, T.Giles, N.J.Stone, K.van Esbroeck, G.White, A.Wohr, M.Veskovic, I.S.Towner, P.F.Mantica, J.I.Prisciandaro, D.J.Morrissey, V.N.Fedoseyev, V.I.Mishin, U.Koster, W.B.Walters, and the NICOLE and ISOLDE Collaborations First On-Line Beta-NMR on Oriented Nuclei: Magnetic dipole moments of the (νp1/2)-11/2- Ground State in 67Ni and (πp3/2)+13/2- Ground State in 69Cu NUCLEAR MOMENTS 67Ni, 69Cu; measured Eβ, Iβ(θ) from low-temperature oriented nuclei as a function of NMR frequency. 67Ni, 69Cu deduced μ. Comparison with core polarization plus meson-exchange current calculations. RADIOACTIVITY 67Ni, 69Cu(β-) [from 238U(p, F), E=1 GeV]; measured Eβ, Iβ(θ) from low-temperature oriented nuclei as a function of NMR frequency. 67Ni, 69Cu deduced μ. Comparison with core polarization plus meson-exchange current calculations.
doi: 10.1103/PhysRevLett.85.1392
1998JO09 Phys.Rev. C58, 1278 (1998) 8Li Electron Spectrum Versus 8B Neutrino Spectrum: Implications for measuring solar neutrinos with a heavy water detector RADIOACTIVITY 8Li(β-); analyzed electron spectrum recoil, radiative corrections; deduced solar neutrino measurement calibration features.
doi: 10.1103/PhysRevC.58.1278
1998JO10 Eur.Phys.J. A 2, 263 (1998) Effective charges for 88Sr and 90Zr Closed-Shell Cores NUCLEAR STRUCTURE 87,89Sr, 90Y; calculated effective charges. 90,91Zr, 93Nb, 92,94,95,96,97,98,100Mo, 99Tc, 96,98,99,100,101,102Ru, 102,104Pd, 103,105,106Cd, 104,105In; calculated quadrupole moments in three model spaces. Comparisons with data.
doi: 10.1007/s100500050118
1998JO17 Eur.Phys.J. A 3, 237 (1998) Effective Magnetic Dipole Operators for 88Sr and 90Zr Closed-Shell Cores NUCLEAR STRUCTURE 88Sr, 90Zr; calculated effective g-factors, magnetic dipole operators. 90,91Zr, 91,92Nb, 92,93Mo, 93,94Tc, 94,95Ru, 96Pd; calculated magnetic moments; deduced two-body core polarization, meson exchange current effects.
doi: 10.1007/s100500050173
1998TO13 Phys.Rev. C58, 1288 (1998) Radiative Corrections in Neutrino-Deuterium Scattering NUCLEAR REACTIONS 2H(ν, pe), (ν, n), E=7-14 MeV; calculated radiative corrections; deduced implications for solar neutrino observation.
doi: 10.1103/PhysRevC.58.1288
1998WH04 Nucl.Phys. A644, 277 (1998) G.N.White, N.J.Stone, J.Rikovska, S.Ohya, J.Copnell, T.J.Giles, Y.Koh, I.S.Towner, B.A.Brown, B.Fogelberg, L.Jacobsson, P.Rahkila, M.Hjorth-Jensen Magnetic Dipole Moments Near 132Sn: New measurement on 135I by NMR/ON RADIOACTIVITY 135I(β-) [from 233U(n, F), E=thermal]; measured Iγ(θ, H, T), NMR on oriented nuclei. 135I deduced ground state g, μ. Shell model, core polarization, mesonic exchange currents. NUCLEAR STRUCTURE 125,127,129,131,133Sb, 133,135I, 137Cs, 139La; calculated μ. Shell model.
doi: 10.1016/S0375-9474(98)00597-1
1998WH05 Nucl.Phys. A640, 322 (1998) G.White, J.Rikovska, N.J.Stone, J.Copnell, I.S.Towner, A.M.Oros, K.Heyde, B.Fogelberg, L.Jacobsson, F.Gustavsson Magnetic Dipole Moments Near 132Sn: Measurement on isomeric 11/2- states in odd-A 131Te and 133Te by NMR/ON RADIOACTIVITY 131,133Te(β-) [from 233U(n, F)]; measured Eγ, Iγ(θ, T, H), NMR on oriented nuclei. 131,133Te deduced isomeric states g, μ. Shell model, core polarization, mesonic exchange currents, particle-core coupling model.
doi: 10.1016/S0375-9474(98)00461-8
1997HA04 Nucl.Phys. A613, 183 (1997) E.Hagberg, I.S.Towner, J.C.Hardy, V.T.Koslowsky, G.Savard, S.Sterbenz Beta Decay of 44V and 52Co RADIOACTIVITY 44,44mV, 52Co(β+) [from 40Ca(6Li, 2n), E=35 MeV; 40Ca(14N, 2n), E= MeV]; measured Eγ, Iγ, T1/2, γββ-, γγβ-coin. 44Ti, 52Fe deduced level energies, branching ratios, ft values. Hyperpure Ge detectors, plastic scintillators.
doi: 10.1016/S0375-9474(96)00432-0
1997HA32 Phys.Rev. C56, 135 (1997) E.Hagberg, I.S.Towner, T.K.Alexander, G.C.Ball, J.S.Forster, J.C.Hardy, J.G.Hykawy, V.T.Koslowsky, J.R.Leslie, H.-B.Mak, I.Neeson, G.Savard Measurement of the l-Forbidden Gamow-Teller Branch of 37K RADIOACTIVITY 37K(β+) [from 40Ca(p, α), E=15 MeV]; measured Eγ, Iγ, βγ-coin; deduced branching ratios, log ft. 37Ar deduced levels, l-forbidden Gamow-Teller strength.
doi: 10.1103/PhysRevC.56.135
1997HI06 Nucl.Phys. A620, 317 (1997) B.Hinfurtner, G.Seewald, E.Hagan, E.Zech, I.S.Towner Nuclear Magnetic Moments of 2.0 h 89Nb and 78 h 89Zr RADIOACTIVITY 89Nb(β+), (EC) [from 89Y(α, 4n)89Nb]; measured Iγ(θ, T, H), NMR on oriented nuclei. 89Nb, 89Zr deduced ground state g, μ.
doi: 10.1016/S0375-9474(97)00193-0
1997KO46 Nucl.Phys. A624, 293 (1997) V.T.Koslowsky, E.Hagberg, J.C.Hardy, H.Schmeing, I.S.Towner 50Fe Beta Decay RADIOACTIVITY 50Fe(β+) [from Ca(12C, 2n)]; measured Eγ, T1/2; deduced branching, consistency with conserved vector current hypothesis. Hyperpure Ge detector, plastic scintillator, high precision.
doi: 10.1016/S0375-9474(97)00370-9
1997ST06 Phys.Rev.Lett. 78, 820 (1997) N.J.Stone, D.Doran, M.Lindroos, J.Rikovska, M.Veskovic, G.White, D.A.Williams, B.Fogelberg, L.Jacobsson, I.S.Towner, K.Heyde Magnetic Moments of Odd-A Sb Isotopes to 133Sb: Significant evidence for mesonic exchange current contributions and on core collective g factors RADIOACTIVITY 129,131,133Sb(β-) [from 235U(n, F), E=thermal]; measured NMR, oriented nuclei; deduced μ, meson exchange effects role. Particle-core coupling model.
doi: 10.1103/PhysRevLett.78.820
1997TO08 At.Data Nucl.Data Tables 67, 71 (1997) Tables of Fractional Parentage Coefficients for the j = 7/2 Shell in a Seniority Basis with Good Isospin
doi: 10.1006/adnd.1997.0748
1995EN04 Phys.Rev. C52, 2216 (1995) J.Engel, M.T.Ressell, I.S.Towner, W.E.Ormand Response of Mica to Weakly Interacting Massive Particles
doi: 10.1103/PhysRevC.52.2216
1995SA16 Phys.Rev.Lett. 74, 1521 (1995) G.Savard, A.Galindo-Uribarri, E.Hagberg, J.C.Hardy, V.T.Koslowsky, D.C.Radford, I.S.Towner 10C Superallowed Branching Ratio and the Cabibbo-Kobayashi-Maskawa Matrix Unitarity RADIOACTIVITY 10C(β+) [from 10B(p, n)]; measured γγ-coin; deduced superallowed decay branching ratio, unitarity implications.
doi: 10.1103/PhysRevLett.74.1521
1994HA07 Nucl.Phys. A571, 555 (1994) E.Hagberg, T.K.Alexander, I.Neeson, V.T.Koslowsky, G.C.Ball, G.R.Dyck, J.S.Forster, J.C.Hardy, J.R.Leslie, H.-B.Mak, H.Schmeing, I.S.Towner Confirmation of the l-Forbidden Gamow-Teller Decay Branch of 39Ca RADIOACTIVITY 39Ca(β+); measured Eγ, Iγ, γββ-coin; deduced ft values, β branching ratios. Hyperpure Ge detector, plastic scintillators.
doi: 10.1016/0375-9474(94)90225-9
1994HA43 Phys.Rev.Lett. 73, 396 (1994); Erratum Phys.Rev.Lett. 74, 1041 (1995) E.Hagberg, V.T.Koslowsky, J.C.Hardy, I.S.Towner, J.G.Hykawy, G.Savard, T.Shinozuka Tests of Isospin Mixing Corrections in Superallowed 0+ → 0+ β Decays RADIOACTIVITY 38mK(β+); 46V(β+); 50Mn(β+); 54Co(β+); measured β-delayed γ spectra; deduced nonanalog 0+ → 0+ branching, limits, isospin mixing corrections implications.
doi: 10.1103/PhysRevLett.73.396
1994PA31 Nucl.Phys. A579, 381 (1994) T.-S.Park, I.S.Towner, K.Kubodera Nuclear Matrix Elements of Axial-Charge Exchange Currents Derived in Heavy-Fermion Chiral Perturbation Theory NUCLEAR STRUCTURE A=16-208; calculated impulse approximation, meson exchange contributions to current ratio. Heavy-fermion chiral perturbation theory, shell model.
doi: 10.1016/0375-9474(94)90914-8
1994TO06 Phys.Rev. C49, 2391 (1994) P, T-Violating Nuclear Matrix Elements in the One-Meson Exchange Approximation
doi: 10.1103/PhysRevC.49.2391
1994TO12 Phys.Lett. 333B, 13 (1994) Quenching of Spin Operators in the Calculation of Radiative Corrections for Nuclear Beta Decay NUCLEAR STRUCTURE A=10-54; calculated 0+-0+ superallowed Fermi β-decay radiative correction axial vector component; deduced quenching role.
doi: 10.1016/0370-2693(94)91000-6
1994WA01 Phys.Rev. C49, 824 (1994) E.K.Warburton, I.S.Towner, B.A.Brown First-Forbidden β Decay: Meson-exchange enhancement of the axial charge at A ≈ 16 NUCLEAR STRUCTURE 11Be, 15,16N(β-); calculated two-body exchange current, one-body impulse approximation matrix elements; deduced axial-charge matrix element multiplicative factor. Shell model.
doi: 10.1103/PhysRevC.49.824
1993HA06 Phys.Lett. 302B, 157 (1993) Shell Dependence of the Coupling Constants for the Effective One-Body Parity Nonconserving Weak Interaction NUCLEAR STRUCTURE 16O, 40Ca, 90Zr, 208Pb, 232Th; calculated effective one-body parity nonconserving weak interaction coupling constants vs mass. Meson exchange model, shell model.
doi: 10.1016/0370-2693(93)90376-S
1992TO03 Nucl.Phys. A540, 478 (1992) The Nuclear-Structure Dependence of Radiative Corrections in Superallowed Fermi Beta-Decay RADIOACTIVITY 14O, 26Al, 34Cl, 38K, 42Sc, 46V, 50Mn, 54Co; calculated β-decay rate correction terms, ft value. Superallowed Fermi β-decay, radiative corrections, shell model.
doi: 10.1016/0375-9474(92)90170-O
1992TO04 Nucl.Phys. A542, 631 (1992) Enhancement in Axial-Charge Matrix Elements from Meson-Exchange Currents NUCLEAR STRUCTURE A=16, 40, 48, 96, 132, 208; calculated first forbidden β-decay enhancement factor. Meson exchange model.
doi: 10.1016/0375-9474(92)90261-H
1992WA28 Phys.Lett. 294B, 1 (1992) Renormalization of the Axial Charge at A ≈ 132 NUCLEAR STRUCTURE 133,134Sn, 134Sb; calculated mesonic exchange contributions to axial charge in first-forbidden β-decay; deduced other effects contribution estimates. Shell model.
doi: 10.1016/0370-2693(92)91629-N
1991AL06 Nucl.Phys. A526, 407 (1991) T.K.Alexander, G.C.Ball, J.S.Forster, I.S.Towner, J.R.Leslie, H.-B.Mak, J.Johansson, J.A.Kuehner, J.C.Waddington The l-Forbidden M1 Decay of the 2522 keV Level in 39K NUCLEAR REACTIONS 4He(39K, α), E=100 MeV; measured Doppler shift attenuation, αγ-coin. 39K levels deduced T1/2, B(M1).
doi: 10.1016/0375-9474(91)90293-F
1991KI04 Nucl.Phys. A529, 39 (1991) S.W.Kikstra, Z.Guo, C.van der Leun, P.M.Endt, S.Raman, T.A.Walkiewicz, J.W.Starner, E.T.Jurney, I.S.Towner Superallowed 26mAl(β++EC)26Mg Decay NUCLEAR REACTIONS 25Mg(n, γ), E=thermal; measured Eγ, Iγ. 26Mg deduced neutron separation energy. 25Mg(p, γ), E=0.7-1.2 MeV; measured Ep, Eγ. 26Al deduced resonances, proton separation energy, isomer (β++EC) decay Q, log ft. Enriched targets.
doi: 10.1016/0375-9474(91)90784-4
1990HA13 Nucl.Phys. A509, 429 (1990) J.C.Hardy, I.S.Towner, V.T.Koslowsky, E.Hagberg, H.Schmeing Superallowed 0+ → 0+ Nuclear β-Decays: A critical survey with tests of CVC and the standard model RADIOACTIVITY 14O, 26mAl, 34Cl, 38mK, 42Sc, 46V, 50Mn, 54Co; analyzed T1/2, other data; deduced up-down quark mixing element.
doi: 10.1016/0375-9474(90)90086-2
1989CL02 Nucl.Phys. A493, 293 (1989) E.T.H.Clifford, E.Hagberg, J.C.Hardy, H.Schmeing, R.E.Azuma, H.C.Evans, V.T.Koslowsky, U.J.Schrewe, K.S.Sharma, I.S.Towner The Decay of 20Na: Measurements of isospin mixing and the weak vector coupling constant as well as other new decay data RADIOACTIVITY 20Na [from 12C(10B, 2n), mass separation]; measured β+ rays, β-delayed Eα, Iα, Eγ, Iγ, T1/2, I(Eγ), (βα)-coin; deduced ft values, βνα-triple correlation coefficients, vector weak coupling constants. 20Ne deduced branching ratios, Gamow-Teller matrix elements, levels, isospin mixing amplitudes. Natural target, Ge(Li), Si surface barrier detectors, NE102A plastic scintillator-Si surface barrier detector telescopes.
doi: 10.1016/0375-9474(89)90399-0
1989KI11 Nucl.Phys. A496, 429 (1989) S.W.Kikstra, C.van der Leun, S.Raman, E.T.Jurney, I.S.Towner Superallowed 42Sc(β+)42Ca Decay NUCLEAR REACTIONS 41Ca(n, γ), E=thermal; measured Eγ, Iγ. 42Ca deduced neutron separation energy, levels. 41Ca(p, γ), E=1.7-2.1 MeV; measured σ(Ep), Eγ, Iγ. 42Sc deduced resonances, J, π, T, T1/2, decay, proton separation energy, Q(β). Enriched target.
doi: 10.1016/0375-9474(89)90069-9
1988AL05 Nucl.Phys. A477, 453 (1988) T.K.Alexander, G.C.Ball, J.S.Forster, I.S.Towner, J.R.Leslie, H.-B.Mak The l-Forbidden Magnetic Dipole Transition in A = 39 NUCLEAR REACTIONS 3He(40Ca, α), E=110 MeV; measured DSA, αγ-coin. 39Ca levels deduced T1/2, B(M1), single-particle operator normalizations.
doi: 10.1016/0375-9474(88)90351-X
1987DE42 Nucl.Phys. A475, 720 (1987) Relativistic Shell Models and Meson-Exchange Currents NUCLEAR STRUCTURE A=15-41; calculated μ corrections. Relativistic shell models.
doi: 10.1016/0375-9474(87)90234-X
1985AL21 Nucl.Phys. A445, 189 (1985) T.K.Alexander, B.Castel, I.S.Towner Neutron and Proton Polarization Charges from E2 Mirror Transitions NUCLEAR STRUCTURE 17,18O, 17,19F, 18,19,20,22Ne, 22,24,25,26Mg, 25,27Al, 26,27,28,29,30Si, 29P, 30,32,33,34S, 34,36,38Ar, 38Ca; analyzed data; deduced E2 effective charges. Schematic model.
doi: 10.1016/0375-9474(85)90067-3
1985HO17 Nucl.Phys. A441, 344 (1985) D.Horn, I.S.Towner, O.Hausser, D.Ward, H.R.Andrews, M.A.Lone, J.F.Sharpey-Schafer, N.Rud, P.Taras Single-Particle States at very High Spin in the Light Dysprosium Isotopes NUCLEAR REACTIONS 124Sn(32S, xn), E=150, 163 MeV; measured γγ-coin, recoil distance. 150,151,152Dy deduced levels, J, π, T1/2, B(λ). Pulsed beam, Compton suppressed Ge(Li) detectors, NaI(Tl) array, plunger. Shell model, effective interactions. NUCLEAR STRUCTURE 148,149,150,151,152Dy; calculated level, B(λ). Shell model, effective interactions.
doi: 10.1016/0375-9474(85)90037-5
1984HA32 J.Phys.(Paris), Colloq.C4, 417 (1984); See 1984Ha58 Gamow-Teller Strength Distribution in the β-Decay of Exotic Nuclei
1984HA58 J.Phys.(Paris), Colloq.C-4, 417 (1984) Gamow-Teller Strength Distribution in the β-Decay of Exotic Nuclei RADIOACTIVITY 14O, 18Ne, 22Mg, 34Ar, 38Ca, 42Ti(β+); analyzed Gamow-Teller strengths. 76,77Zn, 76,77,78,79,80,81Ga, 85Se(β-); 182,183,184,185,186,187,189,191Hg(β+), (EC); analyzed β-strength functions. A=72-154; analyzed average β-strength functions. 73Br, 81Zr, 77Sr, 73Kr, 69Se, 65Ge, 113,115,117Xe, 109Te(β+p); 97Rb(β-n); analyzed delayed proton, neutron spectra; deduced average strength functions.
1984TO06 J.Phys.(Paris), Colloq.C4, 519 (1984); See 1984To15 On l-Forbidden M1 and GT Transitions in A = 39
1984TO15 J.Phys.(Paris), Colloq.C-4, 519 (1984) On l-Forbidden M1 and GT Transitions in A = 39 NUCLEAR STRUCTURE A=39; calculated isovector single particle matrix element, l-allowed transition corrections. One boson exchange model.
1983CL01 Phys.Rev.Lett. 50, 23 (1983) E.T.H.Clifford, J.C.Hardy, H.Schmeing, R.E.Azuma, H.C.Evans, T.Faestermann, E.Hagberg, K.P.Jackson, V.T.Koslowsky, U.J.Schrewe, K.S.Sharma, I.S.Towner Kinematic Shifts in the β-Delayed Particle Decay of 20Na, and the β-ν Angular Correlation RADIOACTIVITY 20Na(β+), (EC) [from 12C(10B, 2n), E=50 MeV]; measured βν(θ), βνα-coin; deduced β-delayed α-particle kinematic shifts, triple correlation coefficient; deduced superallowed β-decay vector weak coupling constant.
doi: 10.1103/PhysRevLett.50.23
1983HO09 Phys.Rev.Lett. 50, 1447 (1983) D.Horn, O.Hausser, I.S.Towner, H.R.Andrews, M.A.Lone, P.Taras Identification of Single-Particle Configurations at very High Spin in 150-152Dy NUCLEAR STRUCTURE 148,149,150,151,152Dy; calculated levels, B(λ) ratios. Shell model. NUCLEAR REACTIONS 124Sn(32S, xn), E=163 MeV; measured γγ-coin. 150,151,152Dy deduced levels, J, π, configurations, γ-branching, B(λ) ratios. Shell model.
doi: 10.1103/PhysRevLett.50.1447
1983RA04 Phys.Rev. C27, 1188 (1983) S.Raman, E.T.Jurney, D.A.Outlaw, I.S.Towner 34Cl Superallowed β Decay RADIOACTIVITY 34Cl(β+) [from 33S(p, γ)]; 35S(β-); analyzed data. 34Cl deduced Q(β++EC), T1/2, ft. 35S deduced Q(β-). NUCLEAR REACTIONS 32,33,34S(n, γ), E=thermal; measured Eγ. 33,34,35S deduced neutron separation energy. 33,34S(p, γ), E=0.9-1.4 MeV; measured Eγ. 34Cl, 35Cl deduced resonances, proton separation energy.
doi: 10.1103/PhysRevC.27.1188
1983TO08 Nucl.Phys. A399, 334 (1983) Corrections to the Single-Particle M1 and Gamow-Teller Matrix Elements NUCLEAR STRUCTURE A=3, 15, 17, 39, 41; calculated magnetic moment, M1, Gamow-Teller matrix element corrections. Second-order core polarization, isobar, meson exchange currents.
doi: 10.1016/0375-9474(83)90252-X
1981TO03 Nucl.Phys. A356, 445 (1981) Meson-Exchange Currents in Thermal n - 3He Radiative Capture NUCLEAR REACTIONS 3He(n, γ), E=thermal; calculated σ. Oscillator wave functions, meson exchange effects.
doi: 10.1016/0375-9474(81)90200-1
1981TO16 Nucl.Phys. A372, 331 (1981) Role of 2p-2h States in Weak 0+-0- Transitions in A = 16 Nuclei NUCLEAR REACTIONS 16O(μ-, ν), E at rest; calculated muon capture rate. Meson exchange, second-order perturbation theory. RADIOACTIVITY 16N; calculated β-decay rate. Meson exchange, second-order perturbation theory.
doi: 10.1016/0375-9474(81)90039-7
1981VA07 J.Phys.(London) G7, 1029 (1981) M.G.Vassanji, F.C.Khanna, I.S.Towner A Calculation of the Deuteron Static Moments in a One-Boson-Exchange Model NUCLEAR STRUCTURE 2H; calculated μ, quadrupole moment, rms radius. One-boson exchange model.
doi: 10.1088/0305-4616/7/8/009
1980EW02 Nucl.Phys. A343, 109 (1980) G.T.Ewan, E.Hagberg, J.C.Hardy, B.Jonson, S.Mattsson, P.Tidemand-Petersson, I.S.Towner The Decay of 35K RADIOACTIVITY 35K [from 45Sc(p, 8n3p), chemical, mass separation]; measured Eγ, Iγ, β-delayed Ep, Ip; deduced logft. 35Ar deduced levels. Ge(Li), surface barrier Si detectors.
doi: 10.1016/0375-9474(80)90643-0
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