NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = J.D.Keightley Found 15 matches. 2021BE13 Appl.Radiat.Isot. 170, 109572 (2021) D.E.Bergeron, S.M.Collins, L.Pibida, J.T.Cessna, R.Fitzgerald, B.E.Zimmerman, P.Ivanov, J.D.Keightley, E.Napoli Ra-224 activity, half-life, and 241 keV gamma ray absolute emission intensity: A NIST-NPL bilateral comparison RADIOACTIVITY 224Ra(α); measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, T1/2. The national metrology institutes for the United Kingdom (UK) and the United States of America (USA) activity standards.
doi: 10.1016/j.apradiso.2020.109572
2020AR03 Appl.Radiat.Isot. 160, 109102 (2020) Standardisation of 231Pa by defined solid angle and liquid scintillation methods at NPL RADIOACTIVITY 231Pa(α); measured decay products, Eα, Iα, Eγ, Iγ; deduced activities per unit mass for standardisation purposes.
doi: 10.1016/j.apradiso.2020.109102
2019CO04 Appl.Radiat.Isot. 145, 240 (2019) S.M.Collins, J.D.Keightley, P.Ivanov, A.Arinc, S.M.Jerome, A.J.Fenwick, A.K.Pearce The potential radio-immunotherapeutic α-emitter 227Th - part I: Standardisation via primary liquid scintillation techniques and decay progeny ingrowth measurements RADIOACTIVITY 227Th(α); measured decay products, Eγ, Iγ; deduced primary standardisation of the activity.
doi: 10.1016/j.apradiso.2018.12.012
2019CO05 Appl.Radiat.Isot. 145, 251 (2019) S.M.Collins, J.D.Keightley, P.Ivanov, A.Arinc, A.J.Fenwick, A.K.Pearce The potential radio-immunotherapeutic α-emitter 227Th - part II: Absolute γ-ray emission intensities from the excited levels of 223Ra RADIOACTIVITY 227Th(α); measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities. Comparison with available data.
doi: 10.1016/j.apradiso.2018.10.023
2018LO02 Europhys.Lett. 120, 22001 (2018) G.Lorusso, S.M.Collins, K.Jagan, G.W.Hitt, A.M.Sadek, P.M.Aitken-Smith, D.Bridi, J.D.Keightley Measuring radioactive half-lives via statistical sampling in practice RADIOACTIVITY 211Pb(β-); analyzed available data; deduced T1/2.
doi: 10.1209/0295-5075/120/22001
2018PO02 Appl.Radiat.Isot. 134, 6 (2018) S.Pomme, H.Stroh, T.Altzitzoglou, J.Paepen, R.Van Ammel, K.Kossert, O.Nahle, J.D.Keightley, K.M.Ferreira, L.Verheyen, M.Bruggeman Is decay constant? RADIOACTIVITY 3H, 14C, 90Sr, 134Cs(β-), 152Eu(EC), (β-), (β+), 22Na, 65Zn(β+), (EC), 54Mn, 109Cd(EC), 209Po, 241Am(α), 226Ra(α); analyzed available data for presence of systematic modulations; deduced amplitudes of fitted oscillations to residuals from exponential decay do not exceed 3 times their standard uncertainty, contradiction of the assertion that neutrino-induced beta decay provides information about the deep solar interior.
doi: 10.1016/j.apradiso.2017.09.002
2017PO15 Metrologia 54, 19 (2017) S.Pomme, H.Stroh, J.Paepen, R.Van Ammel, M.Marouli, T.Altzitzoglou, M.Hult, K.Kossert, O.Nahle, H.Schrader, F.Juget, C.Bailat, Y.Nedjadi, F.Bochud, T.Buchillier, C.Michotte, S.Courte, M.W.van Rooy, M.J.van Staden, J.Lubbe, B.R.S.Simpson, A.Fazio, P.De Felice, T.W.Jackson, W.M.Van Wyngaardt, M.I.Reinhard, J.Golya, S.Bourke, T.Roy, R.Galea, J.D.Keightley, K.M.Ferreira, S.M.Collins, A.Ceccatelli, L.Verheyen, M.Bruggeman, B.Vodenik, M.Korun, V.Chiste, M.-N.Amiot On decay constants and orbital distance to the Sun-part II: beta minus decay RADIOACTIVITY 3H, 14C, 60Co, 85Kr, 90Sr, 124Sb, 134,137Cs, 154Eu(β-); analyzed available data from radionuclide metrology laboratories, residuals from the exponential decay curves for annual oscillations; deduced systematic deviations from a purely exponential decay curve differ in amplitude and phase from one data set to another and appear attributable to instabilities in the instrumentation and measurement conditions, oscillations in phase with Earth's orbital distance to the Sun could not be observed, no apparent indications for systematic oscillations at a level of weeks or months.
doi: 10.1088/1681-7575/54/1/19
2017PO16 Metrologia 54, 1 (2017) S.Pomme, H.Stroh, J.Paepen, R.Van Ammel, M.Marouli, T.Altzitzoglou, M.Hult, K.Kossert, O.Nahle, H.Schrader, F.Juget, C.Bailat, Y.Nedjadi, F.Bochud, T.Buchillier, C.Michotte, S.Courte, M.W.van Rooy, M.J.van Staden, J.Lubbe, B.R.S.Simpson, A.Fazio, P.De Felice, T.W.Jackson, W.M.Van Wyngaardt, M.I.Reinhard, J.Golya, S.Bourke, T.Roy, R.Galea, J.D.Keightley, K.M.Ferreira, S.M.Collins, A.Ceccatelli, L.Verheyen, M.Bruggeman, B.Vodenik, M.Korun, V.Chiste, M.-N.Amiot On decay constants and orbital distance to the Sun-part I: alpha decay RADIOACTIVITY 209Po, 226Ra, 228Th, 230U, 241Am(α); analyzeed two decades of data from various nuclear metrology institutes around the globe, residuals from the exponential decay curves for annual oscillations; deduced that systematic deviations from a purely exponential decay curve differ in amplitude and phase from one data set to another are attributable to instabilities in the instrumentation and measurement conditions, lack of apparent indications for systematic oscillations at a level of weeks or months.
doi: 10.1088/1681-7575/54/1/1
2017PO17 Metrologia 54, 36 (2017) S.Pomme, H.Stroh, J.Paepen, R.Van Ammel, M.Marouli, T.Altzitzoglou, M.Hult, K.Kossert, O.Nahle, H.Schrader, F.Juget, C.Bailat, Y.Nedjadi, F.Bochud, T.Buchillier, C.Michotte, S.Courte, M.W.van Rooy, M.J.van Staden, J.Lubbe, B.R.S.Simpson, A.Fazio, P.De Felice, T.W.Jackson, W.M.Van Wyngaardt, M.I.Reinhard, J.Golya, S.Bourke, T.Roy, R.Galea, J.D.Keightley, K.M.Ferreira, S.M.Collins, A.Ceccatelli, L.Verheyen, M.Bruggeman, B.Vodenik, M.Korun, V.Chiste, M.-N.Amiot On decay constants and orbital distance to the Sun-part III: beta plus and electron capture decay RADIOACTIVITY 22Na, 54Mn, 55Fe, 57Co, 65Zn, 82,85Sr, 109Cd, 133Ba, 152Eu(EC), (β+), 90Sr, 124Sb(β-); analyzed available data on repeated over periods from 200 d up to more than four decades at 14 laboratories across the globe, residuals from the exponential nuclear decay curves for annual oscillations; deduced that systematic deviations from a purely exponential decay curve differ from one data set to another attributable to instabilities in the instrumentation and measurement conditions, oscillations in phase with Earth's orbital distance to the sun could not be observed, lack of apparent indications for systematic oscillations at a level of weeks or months.
doi: 10.1088/1681-7575/54/1/36
2016PO08 Phys.Lett. B 761, 281 (2016) S.Pomme, H.Stroh, J.Paepen, R.Van Ammel, M.Marouli, T.Altzitzoglou, M.Hult, K.Kossert, O.Nahle, H.Schrader, F.Juget, C.Bailat, Y.Nedjadi, F.Bochud, T.Buchillier, C.Michotte, S.Courte, M.W.van Rooy, M.J.van Staden, J.Lubbe, B.R.S.Simpson, A.Fazio, P.De Felice, T.W.Jackson, W.M.Van Wyngaardt, M.I.Reinhard, J.Golya, S.Bourke, T.Roy, R.Galea, J.D.Keightley, K.M.Ferreira, S.M.Collins, A.Ceccatelli, M.Unterweger, R.Fitzgerald, D.E.Bergeron, L.Pibida, L.Verheyen, M.Bruggeman, B.Vodenik, M.Korun, V.Chiste, M.-N.Amiot Evidence against solar influence on nuclear decay constants RADIOACTIVITY 209Po, 226Ra, 228Th, 230U, 241Am(α), 3H, 14C, 60Co, 85Kr, 90Sr, 124Sb, 134,137Cs(β-), 54Mn, 55Fe, 57Co, 82,85Sr, 109Cd, 133Ba(EC), 22Na, 65Zn, 207Bi(EC), (β+), 152Eu(β-), (EC), (β+); measured decay products; deduced decay constant vs. solar activity, exponential nature of nuclear decay.
doi: 10.1016/j.physletb.2016.08.038
2015CO02 Appl.Radiat.Isot. 99, 46 (2015) S.M.Collins, A.K.Pearce, K.M.Ferreira, A.J.Fenwick, P.H.Regan, J.D.Keightley Direct measurement of the half-life of 223Ra RADIOACTIVITY 223Ra(α); measured decay products, Eα, Iα, Eγ, Iγ; deduced T1/2 and its uncertainties. Comparison with available data.
doi: 10.1016/j.apradiso.2015.02.003
2015CO07 Appl.Radiat.Isot. 102, 15 (2015) S.M.Collins, A.K.Pearce, P.H.Regan, J.D.Keightley Precise measurements of the absolute γ-ray emission probabilities of 223Ra and decay progeny in equilibrium RADIOACTIVITY 223Ra, 219Rn, 215Po, 211Bi(α), 211Pb, 207Tl(β-); measured decay products, Eγ, Iγ; deduced γ-ray emission probabilities, α-transition probabilities of the 223Ra. Comparison with available data.
doi: 10.1016/j.apradiso.2015.04.008
2004JO03 Appl.Radiat.Isot. 60, 347 (2004) L.C.Johansson, A.V.Harms, J.D.Keightley, A.K.Pearce, D.H.Woods, M.J.Woods Primary standardisation of 204Tl using the efficiency tracing method RADIOACTIVITY 204Tl(EC), (β-); measured βγ-coin. Tracer method for standardization.
doi: 10.1016/j.apradiso.2003.11.040
2002WO02 Appl.Radiat.Isot. 56, 327 (2002) D.H.Woods, M.I.Baker, J.D.Keightley, L.J.Keightley, J.L.Makepeace, A.K.Pearce, A.P.Woodman, M.J.Woods, S.A.Woods, S.Waters Standardisation of 11C RADIOACTIVITY 11C(β+), (EC) [from 14N(p, α)]; measured Eγ, Iγ, βγ-coin, T1/2; deduced source standardization.
doi: 10.1016/S0969-8043(01)00209-3
2000WO02 Appl.Radiat.Isot. 52, 581 (2000) D.H.Woods, M.Ciocanel, L.J.Husband, J.D.Keightley, P.de Lavison, S.Lineham, M.J.Woods, S.A.Woods Standardisation and Decay Data of 186Re RADIOACTIVITY 186Re(β-), (EC); measured γ-ray emission probabilities.
doi: 10.1016/S0969-8043(99)00213-4
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