NSR Query Results
Output year order : Descending NSR database version of April 24, 2024. Search: Author = J.C.Hardy Found 199 matches. Showing 1 to 100. [Next]2021KO09 Nucl.Instrum.Methods Phys.Res. A1000, 165240 (2021) K.Kolos, A.M.Hennessy, N.D.Scielzo, V.E.Iacob, J.C.Hardy, M.A.Stoyer, A.P.Tonchev, W.-J.Ong, M.T.Burkey, B.Champine, J.A.Clark, P.Copp, A.Gallant, E.B.Norman, R.Orford, H.I.Park, J.Rohrer, D.Santiago-Gonzalez, G.Savard, A.J.Shaka, B.S.Wang, S.Zhu New approach to precisely measure γ-ray intensities for long-lived fission products, with results for the decay of 95Zr RADIOACTIVITY 95Zr, 95Nb, 95Sr, 95Y(β-); measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced γ-ray energies and intensities, β-branching ratios. Comparison with a Monte Carlo decay code simulations. CARIBU facility, the reactor facility at TAMU.
doi: 10.1016/j.nima.2021.165240
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
2020HO10 Phys.Rev. C 102, 014310 (2020) V.Horvat, E.E.Tereshatov, J.C.Hardy, N.Nica, C.M.Folden, V.E.Iacob, M.B.Trzhaskovskaya K-shell internal conversion coefficient for M4 decay of the 30.8 keV isomer in 93Nb RADIOACTIVITY 93Nb(IT); measured Eγ, Iγ, and K-shell conversion coefficient of the 30.76-keV M4 transition from the 30.76-keV, (1/2-) isomer using a Si(Li) detector for direct IT γ-ray and IC K-shell x-ray detection; deduced precise level energy of the isomer. Comparison with different theoretical models.
doi: 10.1103/PhysRevC.102.014310
2020IA01 Phys.Rev. C 101, 015504 (2020) V.E.Iacob, J.C.Hardy, H.I.Park, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, A.Saastamoinen New precise half-life measurement for the superallowed β+ emitter 34Ar RADIOACTIVITY 34Ar(β+) [from 1H(35Cl, 2n), E=30 MeV/nucleon at the K500 superconducting cyclotron of Texas A and M University, followed by separation of fragments using the Momentum Achromat Recoil Spectrometer (MARS)]; measured Eβ, decay time spectrum, precise T1/2 of 34Ar decay using 4π proportional gas counter; deduced ft value for the superallowed β transition. Data analyzed as a linked parent-daughter pair. Discussed uncertainty budget. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.101.015504
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
2018HA07 Appl.Radiat.Isot. 134, 406 (2018) J.C.Hardy, N.Nica, V.E.Iacob, M.B.Trzhaskovskaya Precise test of internal-conversion theory: αK measurements for transitions in nine nuclei spanning 45 ≤ Z ≤ 78 RADIOACTIVITY 111Cd, 134Cs, 119Sn, 125,127Te, 137Ba, 193Ir, 197Pt(IT); measured decay products, Eγ, Iγ, Eβ, Iβ, X-rays; deduced internal-conversion coefficients. Comparison with theoretical calculations.
doi: 10.1016/j.apradiso.2017.05.021
2018IA01 Phys.Rev. C 97, 035501 (2018) V.E.Iacob, J.C.Hardy, L.Chen, V.Horvat, M.Bencomo, N.Nica, H.I.Park, B.T.Roeder, A.Saastamoinen Precise half-life measurement of the superallowed emitter 30S RADIOACTIVITY 30S(β+), (EC)[from 1H(31P, 2n), E=30 MeV/nucleon]; 30P(β+), (EC)[from 30S decay]; measured β+ using 4π proportional gas counter, half-lives of 30S and 30P decays. Comparison with previous measurements. Relevance to determination of up-down element of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix Vud for 0+ to 0+ superallowed β transition in the decay of 30S to 30P. NUCLEAR REACTIONS 1H(31P, 2n)27Si/29P/30S/31S, E=30 MeV/nucleon; measured yields of ions momentum achromat recoil spectrometer (MARS) spectrometer at Texas A and M University K500 superconducting cyclotron facility.
doi: 10.1103/PhysRevC.97.035501
2018NI14 Phys.Rev. C 98, 054321 (2018) N.Nica, J.C.Hardy, V.E.Iacob, V.Horvat, H.I.Park, T.A.Werke, K.J.Glennon, C.M.Folden, V.I.Sabla, J.B.Bryant, X.K.James, M.B.Trzhaskovskaya Precise measurement of αK andαT for the 39.8-keV E3 transition in 103Rh: Test of internal-conversion theory RADIOACTIVITY 103Rh(IT)[from 103Ru(β-) produced in 102Ru(n, γ), and 103Pd(EC) produced in 102Pd(n, γ) at the TRIGA reactor of Texas A and M]; measured Eγ, Iγ, K-x rays, K-shell and total internal conversion coefficients; deduced M4 admixture and mixing ratio for the 39.8-keV isomeric transition in 103Rh. Comparison with Dirac-Fock calculations, and results disagree with the theory which ignores the K-shell atomic vacancy. 103Ru(β-)[from 102Ru(n, γ), E=thermal]; measured Eγ, Iγ; deduced K-x ray intensity using the known data for multipolarities and mixing ratios of non-isomeric transitions in 103Rh from the decay of 103Ru. Comparison with previous experimental γ-ray intensities in 103Ru decay.
doi: 10.1103/PhysRevC.98.054321
2018SH27 Phys.Rev. C 98, 015502 (2018) P.D.Shidling, R.S.Behling, B.Fenker, J.C.Hardy, V.E.Iacob, M.Mehlman, H.I.Park, B.T.Roeder, D.Melconian High-precision half-life measurement of the β+ decay of 21Na RADIOACTIVITY 21Na(β+)[from 1H(22Ne, 21Na), E=25 MeV/nucleon, followed by analysis of reaction products by the momentum achromat recoil spectrometer (MARS) at Texas A and M cyclotron facility]; measured positrons and half-life of the decay of 21Na using 4π continuous gas-flow proportional counter; deduced magnitude of the up-down element of the Cabbibo-Kobayashi-Maskawa matrix Vud. Comparison with previous experimental values, and deduced averaged half-life and Ft value.
doi: 10.1103/PhysRevC.98.015502
2017ER01 Phys.Rev. C 95, 025501 (2017); Pub.Note Phys.Rev. C 102, 039902 (2020) T.Eronen, J.C.Hardy, L.Canete, A.Jokinen, J.Hakala, A.Kankainen, V.S.Kolhinen, J.Koponen, I.D.Moore, I.M.Murray, H.Penttila, I.Pohjalainen, O.Poleshchuk, J.Reinikainen, S.Rinta-Antila, N.Soukouti, A.Voss, J.Aysto QEC value of the superallowed β emitter 42Sc ATOMIC MASSES 42,42mSc, 42Ca; measured cyclotron frequency ratios using time-of-flight ion-cyclotron resonance (TOF-ICR) technique at IGISOL-JYFLTRAP facility at Jyvaskyla; deduced precise Q values and compared with previous experimental data, precise energy of the 7+ isomeric state in 42Sc; discussed error budgets for Ft values of superallowed β transition in 42Sc.
doi: 10.1103/PhysRevC.95.025501
2017NI03 Phys.Rev. C 95, 034325 (2017) N.Nica, J.C.Hardy, V.E.Iacob, H.I.Park, K.Brandenburg, M.B.Trzhaskovskaya Precise measurement of αK for the 88.2-keV M4 transition in 127Te: Test of internal-conversion theory RADIOACTIVITY 127Te(β-); 127mTe(IT), (β-)[from 126Te(n, γ), E=thermal]; measured E(x ray), I(x ray), Eγ, Iγ, K-conversion coefficient for the 88.2-keV M4 transition in 127Te and compared with Dirac-Fock theoretical calculations. 127I; deduced levels, β branchings, γ-branching ratios, and compared with previous experimental results.
doi: 10.1103/PhysRevC.95.034325
2017NI10 Phys.Rev. C 95, 064301 (2017) N.Nica, J.C.Hardy, V.E.Iacob, T.A.Werke, C.M.Folden, K.Ofodile, M.B.Trzhaskovskaya Precise measurement of αK and αT for the 109.3-keV M4 transition in 125Te: Test of internal-conversion theory RADIOACTIVITY 125mTe(IT)[from 124Te(n, γ), E=thermal at 1-MW TRIGA reactor of Texas A and M Nuclear Science Center]; measured Eγ, Iγ, E(x ray), I(x ray), K-conversion coefficient, and total conversion coefficient for 109.3-keV M4 transition. Comparison with Dirac-Fock calculations.
doi: 10.1103/PhysRevC.95.064301
2016NI05 Phys.Rev. C 93, 034305 (2016) N.Nica, J.C.Hardy, V.E.Iacob, T.A.Werke, C.M.Folden, L.Pineda, M.B.Trzhaskovskaya Precise measurement of αK and αT for the 150.8-keV E3 transition in 111Cd: Test of internal-conversion theory RADIOACTIVITY 111mCd(IT)[from 110Cd(n, γ), E=thermal from TRIGA reactor at Texas A and M]; measured Eγ, Iγ, I(K-x rays); deduced total and K-conversion coefficients for 150.8-keV E3 transition. Comparison with theoretical value from Dirac-Fock theory which includes the atomic vacancy. Possible evidence of penetration effects for this transition.
doi: 10.1103/PhysRevC.93.034305
2015AU02 At.Data Nucl.Data Tables 103-104, 1 (2015); See 2014PF01 G.Audi, K.Blaum, M.Block, G.Bollen, S.Goriely, J.C.Hardy, F.Herfurth, F.G.Kondev, H.-J.Kluge, D.Lunney, J.M.Pearson, G.Savard, K.S.Sharma, M.Wang, Y.H.Zhang Comment on "Atomic mass compilation 2012" by B. Pfeiffer, K. Venkataramaniah, U. Czok, C. Scheidenberger COMPILATION 45Cr, 47Ar, 65As, 73Ge, 100Sn, 286Nh; compiled experimental atomic masses; deduced differences with work of B. Pfeiffer et al.
doi: 10.1016/j.adt.2014.05.003
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
2014HA07 Appl.Radiat.Isot. 87, 87 (2014) J.C.Hardy, N.Nica, V.E.Iacob, S.Miller, M.Maguire, M.B.Trzhaskovskaya Precise test of internal-conversion theory: Transitions measured in five nuclei spanning 50 ≤ Z ≤ 78 RADIOACTIVITY 197Pt, 193Ir, 137Ba, 134Cs, 119Sn(IT); measured Eγ, Iγ, X-rays; deduced internal conversion coefficients. Comparison with theoretical calculations.
doi: 10.1016/j.apradiso.2013.11.033
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
2014NI02 Phys.Rev. C 89, 014303 (2014) N.Nica, J.C.Hardy, V.E.Iacob, M.Bencomo, V.Horvat, H.I.Park, M.Maguire, S.Miller, M.B.Trzhaskovskaya Precise measurement of αK for the 65.7-keV M4 transition in 119Sn: Extended test of internal-conversion theory RADIOACTIVITY 119Sn(IT)[from 118Sn(n, γ)]; measured Eγ, Iγ, E(x rays), I(x rays); deduced K-shell internal conversion coefficient of 65.7-keV M4 transition. Comparisons with theoretical conversion coefficient from Dirac-Fock relativistic calculation with and without K-shell atomic vacancy, and with previous measurements.Evidence of support for inclusion of atomic vacancy from comparison of precisely measured conversion coefficients with theoretical calculations for E2, E3 and M4 isomeric transitions in 20 cases including 119Sn, 134Cs, 137Ba, 193Ir and 197Pt.
doi: 10.1103/PhysRevC.89.014303
2014NI14 Nucl.Data Sheets 120, 91 (2014) Further Test of Internal-conversion Theory with a Measurement in 119Sn RADIOACTIVITY 119Sn(IT); measured decay products, Eγ, Iγ, X-rays.; deduced ce coefficient, influence of the atomic vacancy.
doi: 10.1016/j.nds.2014.07.015
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
2014SH25 Phys.Rev. C 90, 032501 (2014) P.D.Shidling, D.Melconian, S.Behling, B.Fenker, J.C.Hardy, V.E.Iacob, E.McCleskey, M.McCleskey, M.Mehlman, H.I.Park, B.T.Roeder Precision half-life measurement of the β+ decay of 37K RADIOACTIVITY 37K(β+)[from 1H(38Ar, 2n), E=29 MeV/nucleon, followed by separation using MARS apparatus at Texas A-M cyclotron facility]; measured Eβ, Iβ, precise half-life of 37K ground state using a 4π continuous-gas-flow proportional counter and a fast tape-transport system; deduced improved logft value, and Vud parameter. Comparison with previous experimental studies.
doi: 10.1103/PhysRevC.90.032501
2013CH51 Nucl.Instrum.Methods Phys.Res. A728, 81 (2013) L.Chen, J.C.Hardy, M.Bencomo, V.Horvat, N.Nica, H.I.Park Digital beta counting and pulse-shape analysis for high-precision nuclear beta decay half-life measurements: Tested on 26Alm RADIOACTIVITY 26Al(EC) [from H(27Al, X), E=23 MeV/nucleon]; measured decay products, Eβ, Iβ; deduced T1/2 and its uncertainty. Comparison with available data.
doi: 10.1016/j.nima.2013.06.039
2012ER04 Eur.Phys.J. A 48, 48 (2012) High-precision QEC-value measurements for superallowed decays
doi: 10.1140/epja/i2012-12048-y
2012HA23 Appl.Radiat.Isot. 70, 1931 (2012) J.C.Hardy, J.R.Goodwin, V.E.Iacob Do radioactive half-lives vary with the Earth-to-Sun distance? RADIOACTIVITY 198Au(β-); measured decay products, Eγ, Iγ; deduced T1/2 independent value for several Earth-Sun distances. Comparison with available data.
doi: 10.1016/j.apradiso.2012.02.021
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
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
2012PA07 Phys.Rev. C 85, 035501 (2012) H.I.Park, J.C.Hardy, V.E.Iacob, L.Chen, J.Goodwin, N.Nica, E.Simmons, L.Trache, R.E.Tribble Precise half-life measurement of the superallowed β+ emitter 46V RADIOACTIVITY 46V(β+)[from 1H(47Ti, 2n), E=32 MeV/nucleon]; measured β spectra, precise half-life of 46V isotope; deduced Ft value for superallowed β transition. Discussed error budget for half-life measurement.
doi: 10.1103/PhysRevC.85.035501
2012TR08 J.Phys.:Conf.Ser. 337, 012058 (2012) L.Trache, A.Banu, J.C.Hardy, V.E.Iacob, M.McCleskey, B.T.Roeder, E.Simmons, A.Spiridon, R.E.Tribble, A.Saastamoinen, A.Jokinen, J.Aysto, T.Davinson, G.Lotay, P.J.Woods, E.Pollacco Decay spectroscopy for nuclear astrophysics: β- and β-delayed proton decay RADIOACTIVITY 23Al, 27P, 31Cl(EC), (β+p) [from 1H(24Mg, X), E=48 MeV/nucleon; 1H(28Si, X), (32S, X), E=40 MeV/nucleon]; measured β-delayed Ep, Ip using DSSSD (double-sided strip Si detector), Iβ using Si detector, pβ-coin, Eγ, Iγ using HPGe, βγ-coin. 23Al deduced mass excess, partial decay scheme, levels, J, π, resonance strength, proton branching, isomeric decay, T1/2, IAS, log ft. Only the 23Al results presented.
doi: 10.1088/1742-6596/337/1/012058
2011ER02 Phys.Rev. C 83, 055501 (2011); Pub.Note Phys.Rev. C 84, 059905 (2011) T.Eronen, D.Gorelov, J.Hakala, J.C.Hardy, A.Jokinen, A.Kankainen, I.D.Moore, H.Penttila, M.Reponen, J.Rissanen, A.Saastamoinen, J.Aysto QEC values of the superallowed β emitters 10C, 34Ar, 38Ca, and 46V ATOMIC MASSES 10C, 10B, 34Ar, 34Cl, 34mCl, 38Ca, 38mK, 38Ar, 46V, 46Ti; measured resonance frequencies ratios using JYFLTRAP Penning-trap and 10C, 34Ar, 38Ca and 46V beams from IGISOL; deduced Q values for β+ decay. Time-of-flight ion-cyclotron-resonance (TOF-ICR) technique. RADIOACTIVITY 10C, 34Ar, 38Ca, 46V(β+); measured Q values for decay from mass measurements.
doi: 10.1103/PhysRevC.83.055501
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
2011PA38 Phys.Rev. C 84, 065502 (2011) H.I.Park, J.C.Hardy, V.E.Iacob, A.Banu, L.Chen, V.V.Golovko, J.Goodwin, V.Horvat, N.Nica, E.Simmons, L.Trache, R.E.Tribble Precise half-life measurement of the superallowed β+ emitter 38Ca RADIOACTIVITY 38Ca, 38mK(β+), (EC)[38Ca from 1H(39K, 2n), E=30 MeV/nucleon, 38K from 38Ca decay]; measured I(β+) using 4π proportional gas counter, half-life, data analyzed as a linked parent-daughter decay. Comparison with previous results. Superallowed β+ emitters.
doi: 10.1103/PhysRevC.84.065502
2011SA15 Phys.Rev. C 83, 045808 (2011) A.Saastamoinen, L.Trache, A.Banu, M.A.Bentley, T.Davinson, J.C.Hardy, V.E.Iacob, M.McCleskey, B.T.Roeder, E.Simmons, G.Tabacaru, R.E.Tribble, P.J.Woods, J.Aysto Experimental study of β-delayed proton decay of 23Al for nucleosynthesis in novae RADIOACTIVITY 23Al(β+), (β+p); measured E(p), I(p), Eγ, Iγ, βγ-, βp-coin. 22Na, 23Mg; deduced levels, J, π, widths, IAS of 23Al, resonance strength at 7787 keV and its contribution to the reaction rates for 22Na(p, γ) reaction at typical nova peak temperatures.
doi: 10.1103/PhysRevC.83.045808
2010BA43 Phys.Rev. C 82, 045501 (2010) G.C.Ball, G.Boisvert, P.Bricault, R.Churchman, M.Dombsky, T.Lindner, J.A.Macdonald, E.Vandervoort, S.Bishop, J.M.D'Auria, J.C.Hardy, V.E.Iacob, J.R.Leslie, H.-B.Mak Precise half-life measurement of the superallowed β+ emitter 38Km RADIOACTIVITY 38mK(β+)[38K beam from Ca(p, X), E=500 MeV]; measured integral activity using a 4π continuous gas flow proportional β counter, half-life; deduced Ft value for superallowed β transition. Comparison with previous half-life measurements.
doi: 10.1103/PhysRevC.82.045501
2010GO25 Phys.Rev. C 82, 044320 (2010) J.R.Goodwin, N.Nica, V.E.Iacob, A.Dibidad, J.C.Hardy Measurement of the half-life of 198Au in a nonmetal: High-precision measurement shows no host-material dependence RADIOACTIVITY 198Au(β-)[from 197Au(n, γ), E=thermal]; measured Eγ, Iγ, half-life in a non-metal environment; deduced no dependence of half-life on host material.
doi: 10.1103/PhysRevC.82.044320
2010HA12 Appl.Radiat.Isot. 68, 1550 (2010) J.C.Hardy, J.R.Goodwin, V.V.Golovko, V.E.Iacob Tests of nuclear half-lives as a function of the host medium and temperature: Refutation of recent claims RADIOACTIVITY 198Au(β-), 97Ru(EC) [from 197Au, Ru(n, γ)]; measured Eγ, Iγ; deduced T1/2, lack of temperature-dependent effects at low temperatures.
doi: 10.1016/j.apradiso.2009.11.047
2010HA34 Nucl.Phys. A844, 138c (2010) Superallowed nuclear β decay: symmetry breaking, CVC and CKM unitarity
doi: 10.1016/j.nuclphysa.2010.05.024
2010IA01 Phys.Rev. C 82, 035502 (2010) V.E.Iacob, J.C.Hardy, A.Banu, L.Chen, V.V.Golovko, J.Goodwin, V.Horvat, N.Nica, H.I.Park, L.Trache, R.E.Tribble Precise half-life measurement of the superallowed β+ emitter 26Si RADIOACTIVITY 26Si(β+)[from 1H(27Al, 2n), E=30 MeV/nucleon]; measured Eβ, Iβ using a 4π proportional gas counter system, and half-life. Comparison with previous results.
doi: 10.1103/PhysRevC.82.035502
2010SA41 J.Phys.:Conf.Ser. 202, 012010 (2010) A.Saastamoinen, L.Trache, A.Banu, M.A.Bentley, T.Davinson, T.Eronen, J.C.Hardy, V.E.Iacob, D.Jenkins, A.Jokinen, M.McCleskey, B.Roeder, G.Tabacaru, R.E.Tribble, P.J.Woods, J.Aysto, for the IGISOL/MARS Collaboration Studies of astrophysically interesting nucleus 23Al NUCLEAR REACTIONS 1H(24Mg, 2n)23Al, E=48 MeV/nucleon; measured reaction products using DSSD (double-sided Si strip detector), Si and HPGe detectors at the focal plane of MARS separator, β-delayed 23Al proton decay; deduced proton branching. ATOMIC PHYSICS 23Al; measured mass, mass excess, proton separation using JYFLTRAP Penning trap at IGISOL.
doi: 10.1088/1742-6596/202/1/012010
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
2009ER07 Phys.Rev.Lett. 103, 252501 (2009) T.Eronen, V.-V.Elomaa, J.Hakala, J.C.Hardy, A.Jokinen, I.D.Moore, M.Reponen, J.Rissanen, A.Saastamoinen, C.Weber, J.Aysto QEC Values of the Superallowed β Emitters 34Cl and 38Km RADIOACTIVITY 34Cl, 38K(EC); measured cyclotron frequency ratios; deduced Q-values with high precision.Online Pening trap.
doi: 10.1103/PhysRevLett.103.252501
2009GO29 Phys.Rev. C 80, 045501 (2009) J.R.Goodwin, V.V.Golovko, V.E.Iacob, J.C.Hardy Half-life of the electron-capture decay of 97Ru: Precision measurement shows no temperature dependence RADIOACTIVITY 97Ru(EC); 103Ru, 105Rh(β-); measured Eγ, Iγ, half-lives at room temperature and 19 K.
doi: 10.1103/PhysRevC.80.045501
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
2009NI13 Phys.Rev. C 80, 064314 (2009) N.Nica, J.C.Hardy, V.E.Iacob, J.Goodwin, C.Balonek, M.Hernberg, J.Nolan, M.B.Trzhaskovskaya Further test of internal-conversion theory with a measurement in 197Pt RADIOACTIVITY 197mPt(IT); measured Eγ, Iγ, x rays; deduced K-shell internal conversion coefficient of 346.5-keV M4 isomeric transition. Comparison with theoretical conversion coefficient from Dirac-Fock calculation.
doi: 10.1103/PhysRevC.80.064314
2008ER04 Phys.Rev.Lett. 100, 132502 (2008) T.Eronen, V.-V.Elomaa, U.Hager, J.Hakala, J.C.Hardy, A.Jokinen, A.Kankainen, I.D.Moore, H.Penttila, S.Rahaman, S.Rinta-Antila, J.Rissanen, A.Saastamoinen, T.Sonoda, C.Weber, J.Aysto QEC Values of the Superallowed β Emitters 50Mn and 54Co RADIOACTIVITY 50Mn, 54Co(EC); measured Q values using penning trap.
doi: 10.1103/PhysRevLett.100.132502
2008HA11 Appl.Radiat.Isot. 66, 701 (2008) J.C.Hardy, N.Nica, V.E.Iacob, C.Balonek, M.B.Trzhaskovskaya Precise tests of internal-conversion theory RADIOACTIVITY 134Cs, 137Ba(IT); measured Eγ, Iγ, E(X-ray), I(X-ray); deduced ICC. Compared results to existing data and to model calculations.
doi: 10.1016/j.apradiso.2008.02.006
2008IA01 Phys.Rev. C 77, 045501 (2008) V.E.Iacob, J.C.Hardy, V.Golovko, J.Goodwin, N.Nica, H.I.Park, L.Trache, R.E.Tribble Precise half-life measurement of the superallowed β+ emitter 10C RADIOACTIVITY 10C(β+) [from 1H(11B, 2n), E=23 MeV/nucleon]; measured half-life using pulsed-beam method; deduced ft value for superallowed β decay.
doi: 10.1103/PhysRevC.77.045501
2008NI02 Phys.Rev. C 77, 034306 (2008) N.Nica, J.C.Hardy, V.E.Iacob, C.Balonek, M.B.Trzhaskovskaya Internal conversion coefficients in 134Cs, 137Ba, and 139La: A precise test of theory RADIOACTIVITY 139Ba(β-) [from 138Ba(n, γ)]; measured K-shell internal conversion coefficients. 134Cs, 137Ba; analyzed K-shell internal conversion coefficients. 134Cs, 137Ba, 139La; deduced T1/2 of 139Ba decay, experimental αK and compared with theory.
doi: 10.1103/PhysRevC.77.034306
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
2007GO39 Eur.Phys.J. A 34, 271 (2007) J.R.Goodwin, V.V.Golovko, V.E.Iacob, J.C.Hardy The half-life of 198Au : High-precision measurement shows no temperature dependence RADIOACTIVITY 198Au(β-); measured Eγ, Iγ, T1/2. Temperature dependence not observed.
doi: 10.1140/epja/i2007-10509-0
2007NI04 Phys.Rev. C 75, 024308 (2007) N.Nica, J.C.Hardy, V.E.Iacob, W.E.Rockwell, M.B.Trzhaskovskaya Test of internal-conversion theory with measurements in 134Cs and 137Ba RADIOACTIVITY 137Cs(β-); 134mCs(IT) [from 133Cs(n, γ)]; measured Eγ, Iγ, X-ray spectra. 134Cs, 137Ba transitions deduced ICC. Comparison with model predictions.
doi: 10.1103/PhysRevC.75.024308
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
2006ER08 Phys.Rev.Lett. 97, 232501 (2006) T.Eronen, V.Elomaa, U.Hager, J.Hakala, A.Jokinen, A.Kankainen, I.Moore, H.Penttila, S.Rahaman, J.Rissanen, A.Saastamoinen, T.Sonoda, J.Aysto, J.C.Hardy, V.S.Kolhinen Q Values of the Superallowed β Emitters 26Alm, 42Sc, and 46V and Their Impact on Vud and the Unitarity of the Cabibbo-Kobayashi-Maskawa Matrix ATOMIC MASSES 26mAl, 42Sc, 46V; measured masses; deduced Q(EC). Comparison with previous results, implications for CKM matrix element discussed.
doi: 10.1103/PhysRevLett.97.232501
2006HA12 Acta Phys.Pol. B37, 77 (2006) CVC tests and CKM unitarity RADIOACTIVITY 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti, 62Ga, 66As, 70Br, 74Rb; analyzed superallowed β-decay data; deduced conservation of vector current, matrix element unitarity.
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
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
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
2006IA03 Phys.Rev. C 74, 045810 (2006) V.E.Iacob, Y.Zhai, T.Al-Abdullah, C.Fu, J.C.Hardy, N.Nica, H.I.Park, G.Tabacaru, L.Trache, R.E.Tribble β decay of proton-rich nucleus 23Al and astrophysical consequences RADIOACTIVITY 23Al(β+), (β+p) [from 1H(24Mg, X)]; measured Eγ, Iγ, βγ-coin, T1/2; deduced log ft. 23Mg deduced levels, J, π, IAS. 23Al deduced ground-state J, π. Astrophysical implications discussed.
doi: 10.1103/PhysRevC.74.045810
2006IA05 Phys.Rev. C 74, 055502 (2006) V.E.Iacob, J.C.Hardy, J.F.Brinkley, C.A.Gagliardi, V.E.Mayes, N.Nica, M.Sanchez-Vega, G.Tabacaru, L.Trache, R.E.Tribble Precise half-life measurements for the superallowed β+ emitters 34Ar and 34Cl RADIOACTIVITY 34,35Ar, 34Cl(β+) [from 1H(35Cl, xnyp)]; measured T1/2.
doi: 10.1103/PhysRevC.74.055502
2005CL08 Eur.Phys.J. A 25, Supplement 1, 629 (2005) J.A.Clark, R.C.Barber, B.Blank, C.Boudreau, F.Buchinger, J.E.Crawford, J.P.Greene, S.Gulick, J.C.Hardy, A.A.Hecht, A.Heinz, J.K.P.Lee, A.F.Levand, B.F.Lundgren, R.B.Moore, G.Savard, N.D.Scielzo, D.Seweryniak, K.S.Sharma, G.D.Sprouse, W.Trimble, J.Vaz, J.C.Wang, Y.Wang, B.J.Zabransky, Z.Zhou Investigating the rp-process with the Canadian Penning trap mass spectrometer ATOMIC MASSES 64Ge, 68Se; analyzed masses; deduced effective T1/2. 90,91Mo, 90,91,92,93Tc, 93,94Ru, 94,95Rh, 104,105,106,107In, 104,105,107,108Sn, 107,108Sb; measured masses. Penning trap, astrophysical implications discussed.
doi: 10.1140/epjad/i2005-06-172-3
2005GR07 Phys.Rev. C 71, 044309 (2005) G.F.Grinyer, C.E.Svensson, C.Andreoiu, A.N.Andreyev, R.A.E.Austin, G.C.Ball, R.S.Chakrawarthy, P.Finlay, P.E.Garrett, G.Hackman, J.C.Hardy, B.Hyland, V.E.Iacob, K.A.Koopmans, W.D.Kulp, J.R.Leslie, J.A.Macdonald, A.C.Morton, W.E.Ormand, C.J.Osborne, C.J.Pearson, A.A.Phillips, F.Sarazin, M.A.Schumaker, H.C.Scraggs, J.Schwarzenberg, M.B.Smith, J.J.Valiente-Dobon, J.C.Waddington, J.L.Wood, E.F.Zganjar High precision measurements of 26Na β- decay RADIOACTIVITY 26Na(β-) [from Si, Ta(p, X)]; measured Eγ, Iγ, T1/2; deduced log ft. 26Mg deduced levels, J, π, β-feeding intensities.
doi: 10.1103/PhysRevC.71.044309
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
2005HA15 Nucl.Phys. A752, 101c (2005) CVC tests and CKM unitarity RADIOACTIVITY 18Ne, 22Mg, 26Si, 30S, 34Ar, 38Ca, 42Ti, 62Ga, 66As, 70Br, 74Rb; analyzed superallowed β-decay data; deduced conservation of vector current, matrix element unitarity.
doi: 10.1016/j.nuclphysa.2005.02.028
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
2005NI12 Phys.Rev. C 71, 054320 (2005) N.Nica, J.C.Hardy, V.E.Iacob, J.R.Montague, M.B.Trzhaskovskaya Precise measurement of K-shell fluorescence yield in iridium: An improved test of internal-conversion theory RADIOACTIVITY 191Os(β-) [from 190Os(n, γ)]; measured Eγ, Iγ, X-ray spectra. 191Ir transition deduced ICC, fluorescence yield. Comparison with model predictions, 193mIr decay data. Need for K-shell hole to be included in calculations discussed.
doi: 10.1103/PhysRevC.71.054320
2005SA44 Phys.Rev.Lett. 95, 102501 (2005) G.Savard, F.Buchinger, J.A.Clark, J.E.Crawford, S.Gulick, J.C.Hardy, A.A.Hecht, J.K.P.Lee, A.F.Levand, N.D.Scielzo, H.Sharma, K.S.Sharma, I.Tanihata, A.C.C.Villari, Y.Wang Q Value of the Superallowed Decay of 46V and Its Influence on Vud and the Unitarity of the Cabibbo-Kobayashi-Maskawa Matrix ATOMIC MASSES 46Ti, 46V; measured masses; deduced Q(EC). Penning trap mass spectrometer. RADIOACTIVITY 46V(EC); analyzed masses; deduced Q(EC), log ft. 10C, 14O, 22Mg, 26mAl, 34Cl, 34Ar, 38mK, 42Sc, 46V, 50Mn, 54Co, 74Rb; compiled, analyzed log ft; deduced quark-mixing matrix element.
doi: 10.1103/PhysRevLett.95.102501
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
2004CL07 Nucl.Phys. A746, 342c (2004) J.A.Clark, R.C.Barber, B.Blank, C.Boudreau, F.Buchinger, J.E.Crawford, S.Gulick, J.C.Hardy, A.Heinz, J.K.P.Lee, A.F.Levand, R.B.Moore, G.Savard, D.Seweryniak, K.S.Sharma, G.D.Sprouse, W.Trimble, J.Vaz, J.C.Wang, Z.Zhou Precise mass measurements of astrophysical interest made with the Canadian Penning trap mass spectrometer ATOMIC MASSES 68Se, 141,142,143,144,145,146,147Ba, 143,144,145,146,147,148La, 145,146,147,148,149,150,151Ce, 148,149,150,151,152,153Pr; measured masses. Penning trap mass spectrometer.
doi: 10.1016/j.nuclphysa.2004.09.051
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
2004NI14 Phys.Rev. C 70, 054305 (2004) N.Nica, J.C.Hardy, V.E.Iacob, S.Raman, C.W.Nestor, Jr., M.B.Trzhaskovskaya Precise measurement of αK for the M4 transition from 193Irm: A test of internal-conversion theory RADIOACTIVITY 193mIr(IT) [from 192Os(n, γ) and subsequent decay]; measured Eγ, Iγ, X-ray spectra; deduced conversion coefficient. Comparison with model predictions.
doi: 10.1103/PhysRevC.70.054305
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
2003HA20 Phys.Rev.Lett. 91, 082501 (2003) J.C.Hardy, V.E.Iacob, M.Sanchez-Vega, R.G.Neilson, A.Azhari, C.A.Gagliardi, V.E.Mayes, X.Tang, L.Trache, R.E.Tribble High Precision Measurement of the Superallowed 0+ → 0+ β Decay of 22Mg RADIOACTIVITY 22Mg(β+) [from 1H(23Na, 2n)]; measured Eγ, Iγ, βγ-coin, T1/2; deduced superallowed branching ratio, log ft. 22Na levels deduced β-feeding intensities.
doi: 10.1103/PhysRevLett.91.082501
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
2003HY02 Phys.Rev. C 68, 015501 (2003) B.C.Hyman, V.E.Iacob, A.Azhari, C.A.Gagliardi, J.C.Hardy, V.E.Mayes, R.G.Neilson, M.Sanchez-Vega, X.Tang, L.Trache, R.E.Tribble Beta decay of 62Ga RADIOACTIVITY 62Ga(EC) [from 1H(64Zn, 62Ga)]; measured Eγ, Iγ, T1/2, branching ratios. 62Zn levels deduced β-feeding intensities. Mass separator. NUCLEAR REACTIONS 1H(64Zn, X), E=41, 42 MeV/nucleon; measured fragments isotopic yields.
doi: 10.1103/PhysRevC.68.015501
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
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
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
2002TR08 Nucl.Phys. A701, 278c (2002) R.E.Tribble, A.Azhari, C.A.Gagliardi, J.C.Hardy, A.Mukhamedzhanov, X.Tang, L.Trache, S.J.Yennello Radioactive Beams at Texas A and M University
doi: 10.1016/S0375-9474(01)01597-4
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
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
2001SA73 Hyperfine Interactions 132, 223 (2001) G.Savard, R.C.Barber, C.Boudreau, F.Buchinger, J.Caggiano, J.Clark, J.E.Crawford, H.Fukutani, S.Gulick, J.C.Hardy, A.Heinz, J.K.P.Lee, R.B.Moore, K.S.Sharma, J.Schwartz, D.Seweryniak, G.D.Sprouse, J.Vaz The Canadian Penning Trap Spectrometer at Argonne
doi: 10.1023/A:1011986930931
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
1999SA76 Nucl.Phys. (Supplement) A654, 961c (1999) G.Savard, R.C.Barber, F.Buchinger, J.E.Crawford, X.Feng, S.Gulick, G.Hackman, J.C.Hardy, J.K.P.Lee, R.B.Moore, K.S.Sharma, J.Uusitalo Weak Interaction Studies with an On-Line Penning Trap Mass Spectrometer
doi: 10.1016/S0375-9474(00)88581-4
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
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
1997KO65 Nucl.Instrum.Methods Phys.Res. A401, 289 (1997) V.T.Koslowsky, E.Hagberg, J.C.Hardy, G.Savard, H.Schmeing, K.S.Sharma, X.J.Sun The Half-Lives of 42Sc, 46V, 50Mn and 54Co RADIOACTIVITY 42Sc, 46V, 50Mn, 54Co(β+) [from 42Ca, 46Ti, 50Cr, 54Fe(p, n)]; measured T1/2. Mass-separated sources.
doi: 10.1016/S0168-9002(97)01017-6
1997SA60 Nucl.Phys. A626, 353c (1997) G.Savard, R.C.Barber, D.Beeching, F.Buchinger, J.E.Crawford, S.Gulick, X.Feng, E.Hagberg, J.C.Hardy, V.T.Koslowsky, J.K.P.Lee, R.B.Moore, K.S.Sharma, M.Watson The Canadian Penning Trap Mass Spectrometer
doi: 10.1016/S0375-9474(97)00557-5
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
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