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NSR database version of April 27, 2024.

Search: Author = J.Keightley

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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, T_1/2. 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
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2020AR03      Appl.Radiat.Isot. 160, 109102 (2020)

A.Arinc, J.D.Keightley

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
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2020JE01      Appl.Radiat.Isot. 155, 108837 (2020)

S.Jerome, C.Bobin, P.Cassette, R.Dersch, R.Galea, H.Liu, A.Honig, J.Keightley, K.Kossert, J.Liang, M.Marouli, C.Michotte, S.Pomme, S.Rottger, R.Williams, M.Zhang

Half-life determination and comparison of activity standards of ²³¹Pa

RADIOACTIVITY ²³¹Pa(α); measured decay products, Eα, Iα; deduced T_1/2 and uncertainties. Comparison with available data.

doi: 10.1016/j.apradiso.2019.108837
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2019BO14      Appl.Radiat.Isot. 153, 108826 (2019)

C.Bobin, J.Bouchard, V.Chiste, S.M.Collins, P.Dryak, A.Fenwick, J.Keightley, M.-C.Lepy, V.Lourenco, A.P.Robinson, J.Sochorova, J.Solc, C.Thiam

Activity measurements and determination of nuclear decay data of ¹⁶⁶Ho in the MRT Dosimetry project

RADIOACTIVITY ¹⁶⁶Ho(β^-); measured decay products, Eγ, Iγ, X-rays, Eβ, Iβ; deduced T_1/2.

doi: 10.1016/j.apradiso.2019.108826
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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
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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
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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 T_1/2.

doi: 10.1209/0295-5075/120/22001
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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
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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
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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
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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
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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
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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 T_1/2 and its uncertainties. Comparison with available data.

doi: 10.1016/j.apradiso.2015.02.003
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Data from this article have been entered in the XUNDL database. For more information, click here.

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
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2014CO08      Appl.Radiat.Isot. 87, 107 (2014)

S.Collins, J.Keightley, C.Gilligan, J.Gasparro, A.Pearce

Determination of the gamma emission intensities of ¹¹¹Ag

RADIOACTIVITY ¹¹¹Ag(β^-); measured decay products, Eγ, Iγ; deduced γ-ray intensities, energy levels. Comparison with available data.

doi: 10.1016/j.apradiso.2013.11.007
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2012BE24      Appl.Radiat.Isot. 70, 1894 (2012)

M.-M.Be, P.Cassette, M.C.Lepy, M.-N.Amiot, K.Kossert, O.J.Nahle, O.Ott, C.Wanke, P.Dryak, G.Ratel, M.Sahagia, A.Luca, A.Antohe, L.Johansson, J.Keightley, A.Pearce

Standardization, decay data measurements and evaluation of ⁶⁴Cu

RADIOACTIVITY ⁶⁴Cu(EC), (β^-); measured reaction products, Eγ, Iγ; analyzed available data; deduced photon emission probabilities, T_1/2, decay scheme. International reference system, results from four laboratories.

doi: 10.1016/j.apradiso.2012.02.056
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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
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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, T_1/2; deduced source standardization.

doi: 10.1016/S0969-8043(01)00209-3
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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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1998BO18      Appl.Radiat.Isot. 49, 1345 (1998)

N.E.Bowles, S.A.Woods, D.H.Woods, S.M.Jerome, M.J.Woods, P.De Lavison, S.Lineham, J.Keightley, I.Poupaki

Standardization of ¹⁵³Sm

RADIOACTIVITY ¹⁵³Sm(β^-) [from ¹⁵²Sm(n, γ)]; measured βγ-coin, T_1/2; deduced γ-emission probabilities.

doi: 10.1016/S0969-8043(97)10071-9
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Note: The following list of authors and aliases matches the search parameter J.Keightley: , J.D.KEIGHTLEY