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NSR database version of April 27, 2024.

Search: Author = K.M.Ferreira

Found 9 matches.

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2020FE10      Appl.Radiat.Isot. 166, 109294 (2020)

A.J.Fenwick, S.M.Collins, W.D.Evans, K.M.Ferreira, S.J.Paisey, A.P.Robinson, C.Marshall

Absolute standardisation and determination of the half-life and gamma emission intensities of ⁸⁹Zr

RADIOACTIVITY ⁸⁹Zr(EC); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced γ-ray energies and intensities, T_1/2. Comparison with available data.

doi: 10.1016/j.apradiso.2020.109294
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Data from this article have been entered in the XUNDL database. For more information, click here.

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
Citations: PlumX Metrics

2016FE04      Appl.Radiat.Isot. 109, 151 (2016)

A.J.Fenwick, K.M.Ferreira, S.M.Collins

Measurement of the ¹⁰⁹Cd half-life

RADIOACTIVITY ¹⁰⁹Cd(EC); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced T_1/2 and its uncertainty. Comparison with available data.

doi: 10.1016/j.apradiso.2015.11.049
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Data from this article have been entered in the XUNDL database. For more information, click here.

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.

2015CO11      Appl.Radiat.Isot. 104, 203 (2015)

S.M.Collins, S.Pomme, S.M.Jerome, K.M.Ferreira, P.H.Regan, A.K.Pearce

The half-life of ²²⁷Th by direct and indirect measurements

RADIOACTIVITY ²²⁷Th(α); measured decay products, Eγ, Iγ, Eα, Iα; deduced T_1/2 and its uncertainties. Comparison with available data.

doi: 10.1016/j.apradiso.2015.07.001
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Data from this article have been entered in the XUNDL database. For more information, click here.