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4. The neutrons for science facility at SPIRAL-2

Author

Ledoux X., Aïche M., Avrigeanu M., Avrigeanu V., Balanzat E., Ban-d'Etat B., Ban G., Bauge E., Bélier G., Bém P., Borcea C., Caillaud T., Chatillon A., Czajkowski S., Dessagne P., Doré D., Fischer U., Frégeau M.O., Grinyer J., Guillous S., Gunsing F., Gustavsson C., Henning G., Jacquot B., Jansson K., Jurado B., Kerveno M., Klix A., Landoas O., Lecolley F.R., Lecouey J.L., Majerle M., Marie N., Materna T., Mrázek J., Negoita F., Novák J., Oberstedt S., Oberstedt A., Panebianco S., Perrot L., Plompen A.J.M., Pomp S., Prokofiev A.V., Ramillon J.M., Farget F., Ridikas D., Rossé B., Sérot O., Simakov S.P., Šimečková E., Štefánik M., Sublet J.C., Taïeb J., Tarrío D., Tassan-Got L., Thfoin I., and Varignon C.

Subjects
Physics, QC1-999
Abstract

Numerous domains, in fundamental research as well as in applications, require the study of reactions induced by neutrons with energies from few MeV up to few tens of MeV. Reliable measurements also are necessary to improve the evaluated databases used by nuclear transport codes. This energy range covers a large number of topics like transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors. A new facility called Neutrons For Science (NFS) is being built for this purpose on the GANIL site at Caen (France). NFS is composed of a pulsed neutron beam for time-of-flight facility as well as irradiation stations for cross-section measurements. Neutrons will be produced by the interaction of deuteron and proton beams, delivered by the SPIRAL-2 linear accelerator, with thick or thin converters made of beryllium or lithium. Continuous and quasi-mono-energetic spectra will be available at NFS up to 40 MeV. In this fast energy region, the neutron flux is expected to be up to 2 orders of magnitude higher than at other existing time-of-flight facilities. In addition, irradiation stations for neutron-, proton- and deuteron-induced reactions will allow performing cross-section measurements by the activation technique. After a description of the facility and its characteristics, the experiments to be performed in the short and medium term will be presented.

Published
2017
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5. Experimental approach to measure thick target neutron yields induced by heavy ions for shielding

Author

Trinh N.D., Fadil M., Lewitowicz M., Brouillard C., Clerc T., Damoy S., Desmezières V., Dessay E., Dupuis M., Grinyer G.F., Grinyer J., Jacquot B., Ledoux X., Madeline A., Menard N., Michel M., Morel V., Porée F., Rannou B., and Savalle A.

Subjects
Physics, QC1-999
Abstract

Double differential (angular and energy) neutron distributions were measured using an activation foil technique. Reactions were induced by impinging two low-energy heavy-ion beams accelerated with the GANIL CSS1 cyclotron: (36S (12 MeV/u) and 208Pb (6.25 MeV/u)) onto thick natCu targets. Results have been compared to Monte-Carlo calculations from two codes (PHITS and FLUKA) for the purpose of benchmarking radiation protection and shielding requirements. This comparison suggests a disagreement between calculations and experiment, particularly for high-energy neutrons.

Published
2017
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9. Double differential neutron spectra generated by the interaction of a 12 MeV/nucleon $^{36}$S beam on a thick $^{nat}$Cu target

Author

Trinh, N.D., Fadil, M., Lewitowicz, M., Ledoux, X., Laurent, B., Thomas, J.-C., Clerc, T., Desmezières, V., Dupuis, M., MADELINE, A., Dessay, E., Grinyer, G.F., Grinyer, J., Menard, N., Porée, F., Achouri, L., Delaunay, F., Parlog, M., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université de Caen Normandie (UNICAEN), Normandie Université (NU), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire de physique corpusculaire de Caen (LPCC), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Heavy-ion induced reaction, Time-of-flight, Nuclear Theory, Activation, Monte-Carlo simulation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Unfolding method, Thick target neutron yield
Abstract

International audience; Double differential neutron spectra (energy, angle) originating from a thick nat Cu target bombarded by a 12 MeV/nucleon 36 S 16+ beam were measured by the activation method and the Time-of-flight technique at the Grand Accélérateur National d’Ions Lourds (GANIL). A neutron spectrum unfolding algorithm combining the SAND-II iterative method and Monte-Carlo techniques was developed for the analysis of the activation results that cover a wide range of neutron energies. It was implemented into a graphical user interface program, called GanUnfold. The experimental neutron spectra are compared to Monte-Carlo simulations performed using the PHITS and FLUKA codes.

Published
2018
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10. Double differential neutron spectra generated by the interaction of a 12 MeV/nucleon 36S beam on a thick natCu target

Author

Trinh, N.D., primary, Fadil, M., additional, Lewitowicz, M., additional, Ledoux, X., additional, Laurent, B., additional, Thomas, J.-C., additional, Clerc, T., additional, Desmezières, V., additional, Dupuis, M., additional, Madeline, A., additional, Dessay, E., additional, Grinyer, G.F., additional, Grinyer, J., additional, Menard, N., additional, Porée, F., additional, Achouri, L., additional, Delaunay, F., additional, and Parlog, M., additional

Published
2018
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11. The Neutrons for Science Facility at SPIRAL-2

Author

Ledoux, X., Aiche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-d'Etat, B., Ban, G., Bauge, E., Belier, G., Bem, P., Borcea, C., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Dore, D., Fischer, U., Fregeau, M. O., Grinyer, J., Guillous, S., Gunsing, F., Gustavsson, Cecilia, Henning, G., Jacquot, B., Jansson, Kaj, Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F. R., Lecouey, J. L., Majerle, M., Marie, N., Materna, T., Mrazek, J., Novak, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A. J. M., Pomp, Stephan, Prokofiev, Alexander, Ramillon, J. M., Farget, F., Ridikas, D., Rosse, B., Serot, O., Simakov, S. P., Simeckova, E., Stanoiu, M., Stefanik, M., Sublet, J. C., Taieb, J., Tarrio, Diego, Tassan-Got, L., Thfoin, I., Varignon, C., Ledoux, X., Aiche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-d'Etat, B., Ban, G., Bauge, E., Belier, G., Bem, P., Borcea, C., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Dore, D., Fischer, U., Fregeau, M. O., Grinyer, J., Guillous, S., Gunsing, F., Gustavsson, Cecilia, Henning, G., Jacquot, B., Jansson, Kaj, Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F. R., Lecouey, J. L., Majerle, M., Marie, N., Materna, T., Mrazek, J., Novak, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A. J. M., Pomp, Stephan, Prokofiev, Alexander, Ramillon, J. M., Farget, F., Ridikas, D., Rosse, B., Serot, O., Simakov, S. P., Simeckova, E., Stanoiu, M., Stefanik, M., Sublet, J. C., Taieb, J., Tarrio, Diego, Tassan-Got, L., Thfoin, I., and Varignon, C.

Abstract

The neutrons for science (NFS) facility is a component of SPIRAL-2, the new superconducting linear accelerator built at GANIL in Caen (France). The proton and deuteron beams delivered by the accelerator will allow producing intense neutron fields in the 100 keV-40 MeV energy range. Continuous and quasi-mono-kinetic energy spectra, respectively, will be available at NFS, produced by the interaction of a deuteron beam on a thick Be converter and by the Li-7(p, n) reaction on thin converter. The pulsed neutron beam, with a flux up to two orders of magnitude higher than those of other existing time-of-flight facilities, will open new opportunities of experiments in fundamental research as well as in nuclear data measurements. In addition to the neutron beam, irradiation stations for neutron-, proton- and deuteron-induced reactions will be available for cross-sections measurements and for the irradiation of electronic devices or biological cells. NFS, whose first experiment is foreseen in 2018, will be a very powerful tool for physics, fundamental research as well as applications like the transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors.

Published
2018
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12. Measurement of thick target neutron yields generated by accelerated heavy ions

Author

Trinh, N.D., Fadil, M., Lewitowicz, M., Delaunay, F., Pârlog, M., Clerc, T., Desmezieres, V., Durand, D., Etasse, D., Grinyer, G., Grinyer, J., Madeline, A., Ledoux, X., Thomas, J.C., Laurent, B., Achouri, N.L., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique corpusculaire de Caen (LPCC), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Lion, Michel

Subjects
ToF technique, Activation foils, [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Heavy ion reactions, Thick Target Neutron Yields, Monte-Carlo simulation, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; In accelerator facilities, due to their high penetration through matter, neutrons emittedfrom the interaction of high intensity primary beams with thick targets represent a risk ofradiation hazards that needs to be well characterized. The objective of the ongoing TTNY(Thick Target Neutron Yields) experimental program at GANIL is to measure neutron yieldsgenerated by the interaction of heavy ions (12C to 208Pb, from 4 MeV/u to 95 MeV/u)with thick targets (natCu, natNb, natC). Double differential (angular and energy) secondaryneutron spectra are obtained using two techniques: the activation of thin foils and neutronToF measurements. Measurement results are compared to Monte-Carlo transport codes(PHITS and FLUKA) in order to benchmark the physics models implemented in the codesto take into account the wide range of nuclear reactions involved. The data collected duringthe experimental program will also allow improving these physics models. In addition, dataobtained with the niobium target (12C (95MeV/u), natNb) are of high interest for the safetystudies associated with the upgrade of the SPIRAL1 facility at GANIL since this beam andtarget combination is the one considered to evaluate the upper limit of neutron radiationhazards associated with the operation of the facility.

Published
2016

13. Measurement of 19Ne spectroscopic properties via a new method of inelastic scattering to study novae

Author

Boulay, F., primary, Bastin, B., additional, de Oliveira Santos, F., additional, Davinson, T., additional, Lemasson, A., additional, Ujic, P., additional, Mrazek, J., additional, Sánchez-Benítez, A. M., additional, Traykov, E., additional, Ramos, D., additional, Achouri, L., additional, Acosta, L., additional, Borcea, C., additional, Ciemala, M., additional, Delahaye, P., additional, Estrade, A., additional, de France, G., additional, Grinyer, J., additional, Jacquot, B., additional, Kamalou, O., additional, Laird, A., additional, Margerin, V., additional, Marquinez-Duran, G., additional, Negoita, F., additional, Rejmund, M., additional, Rodriguez-Tajes, C., additional, Rotaru, F., additional, Schmitt, C., additional, de Séréville, N., additional, Sorlin, O., additional, Stanoiu, M., additional, Thomas, J.C., additional, and Woods, P.J., additional

Published
2018
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14. The Neutrons for Science Facility at SPIRAL-2

Author

Ledoux, X, primary, Aïche, M, additional, Avrigeanu, M, additional, Avrigeanu, V, additional, Balanzat, E, additional, Ban-d’Etat, B, additional, Ban, G, additional, Bauge, E, additional, Bélier, G, additional, Bém, P, additional, Borcea, C, additional, Caillaud, T, additional, Chatillon, A, additional, Czajkowski, S, additional, Dessagne, P, additional, Doré, D, additional, Fischer, U, additional, Frégeau, M O, additional, Grinyer, J, additional, Guillous, S, additional, Gunsing, F, additional, Gustavsson, C, additional, Henning, G, additional, Jacquot, B, additional, Jansson, K, additional, Jurado, B, additional, Kerveno, M, additional, Klix, A, additional, Landoas, O, additional, Lecolley, F R, additional, Lecouey, J L, additional, Majerle, M, additional, Marie, N, additional, Materna, T, additional, Mrázek, J, additional, Novák, J, additional, Oberstedt, S, additional, Oberstedt, A, additional, Panebianco, S, additional, Perrot, L, additional, Plompen, A J M, additional, Pomp, S, additional, Prokofiev, A V, additional, Ramillon, J M, additional, Farget, F, additional, Ridikas, D, additional, Rossé, B, additional, Serot, O, additional, Simakov, S P, additional, Šimečková, E, additional, Stanoiu, M, additional, Štefánik, M, additional, Sublet, J C, additional, Taïeb, J, additional, Tarrío, D, additional, Tassan-Got, L, additional, Thfoin, I, additional, and Varignon, C, additional

Published
2017
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15. High-precision Half-life And Branching Ratio Measurements For Superallowed β+ Emitters At TRIUMF-ISAC

Author

Dunlop, Michelle, primary, Laffoley, A. T., additional, Dunlop, R., additional, Andreoiu, C., additional, E. Austin, R. A., additional, Ball, G. C., additional, Ballast, T., additional, Bender, P. C., additional, Bidaman, H., additional, Bildstein, V., additional, Blank, B., additional, Bouzomita, H., additional, Chagnon-Lessard, S., additional, Chester, A., additional, Cross, D. S., additional, Deng, G., additional, Diaz Varela, A., additional, Finlay, P., additional, Garnsworthy, A. B., additional, Garrett, P. E., additional, Giovinazzo, J., additional, Glister, J., additional, Grinyer, G. F., additional, Grinyer, J., additional, Hackman, G., additional, Hadinia, B., additional, Jamieson, D. S., additional, Jigmeddorj, B., additional, Ketelhut, S., additional, Kisliuk, D., additional, Leach, K.G., additional, Leslie, J. R., additional, MacLean, A. D., additional, Miller, D. W., additional, Mills, W. J., additional, Moukaddam, M., additional, Park, J., additional, Radich, A. J., additional, Rajabali, M. M., additional, Rand, E. T., additional, Starosta, K., additional, Svensson, C. E., additional, Tardiff, E. R., additional, Thomas, J. P., additional, Towner, I. S., additional, Triambak, S., additional, Turko, J., additional, Unsworth, C., additional, Valencik, A., additional, Voss, P., additional, Wang, Z. M., additional, Williams, S., additional, Wong, J., additional, Yates, S. W., additional, and Zganjar, E. F., additional

Published
2017
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16. High-precision half-life measurements of the T=1/2 mirror beta decays F-17 and Cl-33

Author

Grinyer, J, Grinyer, GF, Babo, Mathieu, Bouzomita, H, Chauveau, P, Delahaye, P, Dubois, M, Frigot, R, Jardin, P, Leboucher, C, Maunoury, L, Seiffert, C, Thomas, JC, and Traykov, E

Abstract

Background: Measurements of the ft values for T=1/2 mirror β+ decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix. In most mirror decays used for these tests, uncertainties in the ft values are dominated by the uncertainties in the half-lives. Purpose: Two precision half-life measurements were performed for the T=1/2β+ emitters, 17F and 33Cl, in order to eliminate the half-life as the leading source of uncertainty in their ft values. Method: Half-lives of 17F and 33Cl were determined using β counting of implanted radioactive ion beam samples on a moving tape transport system at the Système de Production d'Ions Radioactifs Accélérés en Ligne low-energy identification station at the Grand Accélérateur National d'Ions Lourds. Results: The 17F half-life result, 64.347 (35) s, precise to ±0.05%, is a factor of 5 times more precise than the previous world average. The half-life of 33Cl was determined to be 2.5038 (22) s. The current precision of ±0.09% is nearly 2 times more precise compared to the previous world average. Conclusions: The precision achieved during the present measurements implies that the half-life no longer dominates the uncertainty of the ft values for both T=1/2 mirror decays 17F and 33Cl. ispartof: Physical Review C vol:92 issue:4 status: published

Published
2015

17. High-precision half-life measurements of the T =1/2 mirror $\beta$ decays $^{17}$F and $^{33}$Cl

Author

Grinyer, J., Grinyer, G.F., Babo, M., Bouzomita, H., Chauveau, P., Delahaye, P., Dubois, M., Frigot, R., Jardin, P., Leboucher, C., Maunoury, L., Seiffert, C., Thomas, J.C., Traykov, E., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), ISOLDE, CERN, CERN [Genève], Institut Pluridisciplinaire Hubert Curien (IPHC), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), GANILEXP, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Expérience GANIL/SPIRAL; International audience; Measurements of the ft values for T=1/2 mirror $\beta$+ decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix. In most mirror decays used for these tests, uncertainties on the ft values are dominated by the uncertainties in the half-lives. Two precision half-life measurements were performed for the T=1/2 $\beta$+ emitters, 17F and 33Cl, in order to eliminate the half-life as the leading source of uncertainty in their ft values. \item[Method] Half-lives of 17F and 33Cl were determined using $\beta$ counting of implanted radioactive ion beam samples on a moving tape transport system at the SPIRAL low energy identification station at GANIL. The 17F half-life result, 64.347~(35) s, precise to $\pm$0.05 %, is a factor of 5 times more precise than the previous world average. The half-life of 33Cl was determined to be 2.5038~(22) s. The current precision of $\pm$0.09 % is nearly 2 times more precise compared to the previous world average. The precision achieved during the present measurements implies that the half-life no longer dominates the uncertainty of the ft values for both T=1/2 mirror decays 17F and 33Cl.

Published
2015
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18. High-precision half-life measurements for the superallowed Fermi β+ emitter $^{18}$Ne

Author

LAFFOLEY, A. T., SVENSSON, C. E., ANDREOIU, C., BALL, G. C., BENDER, P. C., BIDAMAN, H., BILDSTEIN, V., BLANK, Bertram, CROSS, D. S., DENG, G., VARELA, A. Diaz, DUNLOP, M. R., DUNLOP, R., GARNSWORTHY, A. B., GARRETT, P. E., GIOVINAZZO, J., GRINYER, G.F., GRINYER, J., HACKMAN, G., HADINIA, B., JAMIESON, D. S., JIGMEDDORJ, B., KISLIUK, D., LEACH, K. G., LESLIE, J. R., MACLEAN, A. D., MILLER, D., MILLS, B., MOUKADDAM, M., RADICH, A. J., RAJABALI, M. M., RAND, E. T., THOMAS, J.C., TURKO, J., UNSWORTH, C., VOSS, P., Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 23.40.−s, 21.10.Tg, 24.80.+y, 27.20.+n, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015
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19. High-precision half-life measurement for the isospin T=1/2 mirror beta(+) decay of Na-21

Author

Grinyer, J, Grinyer, GF, Babo, Mathieu, Bouzomita, H, Chauveau, P, Delahaye, P, Dubois, M, Frigot, R, Jardin, P, Leboucher, C, Maunoury, L, Seiffert, C, Thomas, JC, and Traykov, E

Abstract

The half-life of the isospin T=1/2 mirror β+ decay of 21Na was measured at the GANIL-SPIRAL radioactive ion beam facility to be T1/2=22.422 (10) s, a result that is more than a factor of 5 times more precise than the previous world average, with a resulting ft value that is now two times more precise. The precision of this new result implies that the half-life is no longer the dominant source of uncertainty in the Ft value used in the calculation of Vud from mirror decays to test the conserved vector current hypothesis of the standard model. The value of Vud deduced from mirror decays using the new half-life result is now in better agreement with the Vud derived from T=1 superallowed 0+ to 0+ transitions. ispartof: Physical Review C vol:91 issue:3 status: published

Published
2015

20. The neutrons for science facility at SPIRAL-2

Author

Ledoux, X., Aïche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-d'Etat, B., Ban, G., Bauge, E., Bélier, G., Bém, P., Borcea, C., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Doré, D., Fischer, U., Frégeau, M. O., Grinyer, J., Guillous, S., Gunsing, F., Gustavsson, Cecilia, Henning, G., Jacquot, B., Jansson, Kaj, Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F. R., Lecouey, J. L., Majerle, M., Marie, N., Materna, T., Mrázek, J., Negoita, F., Novák, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A. J. M., Pomp, Stephan, Prokofiev, Alexander, Ramillon, J. M., Farget, F., Ridikas, D., Rossé, B., Sérot, O., Simakov, S. P., Šimečková, E., Štefánik, M., Sublet, J. C., Taïeb, J., Tarrío, Diego, Tassan-Got, L., Thfoin, I., Varignon, C., Ledoux, X., Aïche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-d'Etat, B., Ban, G., Bauge, E., Bélier, G., Bém, P., Borcea, C., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Doré, D., Fischer, U., Frégeau, M. O., Grinyer, J., Guillous, S., Gunsing, F., Gustavsson, Cecilia, Henning, G., Jacquot, B., Jansson, Kaj, Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F. R., Lecouey, J. L., Majerle, M., Marie, N., Materna, T., Mrázek, J., Negoita, F., Novák, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A. J. M., Pomp, Stephan, Prokofiev, Alexander, Ramillon, J. M., Farget, F., Ridikas, D., Rossé, B., Sérot, O., Simakov, S. P., Šimečková, E., Štefánik, M., Sublet, J. C., Taïeb, J., Tarrío, Diego, Tassan-Got, L., Thfoin, I., and Varignon, C.

Abstract

Numerous domains, in fundamental research as well as in applications, require the study of reactions induced by neutrons with energies from few MeV up to few tens of MeV. Reliable measurements also are necessary to improve the evaluated databases used by nuclear transport codes. This energy range covers a large number of topics like transmutation of nuclear waste, design of future fission and fusion reactors, nuclear medicine or test and development of new detectors. A new facility called Neutrons For Science (NFS) is being built for this purpose on the GANIL site at Caen (France). NFS is composed of a pulsed neutron beam for time-of-flight facility as well as irradiation stations for cross-section measurements. Neutrons will be produced by the interaction of deuteron and proton beams, delivered by the SPIRAL-2 linear accelerator, with thick or thin converters made of beryllium or lithium. Continuous and quasi-mono-energetic spectra will be available at NFS up to 40 MeV. In this fast energy region, the neutron flux is expected to be up to 2 orders of magnitude higher than at other existing time-of-flight facilities. In addition, irradiation stations for neutron-, proton- and deuteron-induced reactions will allow performing cross-section measurements by the activation technique. After a description of the facility and its characteristics, the experiments to be performed in the short and medium term will be presented.

Published
2017
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21. High-precision half-life measurements of the T=1/2 mirror β decays F17 and Cl33

Author

Grinyer, J, Grinyer, G F, Babo, M, Bouzomita, H, Chauveau, P, Delahaye, P, Dubois, M, Frigot, R, Jardin, P, Leboucher, C, Maunoury, L, Seiffert, C, Thomas, J C, and Traykov, E

Subjects
Nuclear Physics - Experiment
Abstract

Background: Measurements of the ft values for T=1/2 mirror β+ decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix. In most mirror decays used for these tests, uncertainties in the ft values are dominated by the uncertainties in the half-lives. Purpose: Two precision half-life measurements were performed for the T=1/2β+ emitters, F17 and Cl33, in order to eliminate the half-life as the leading source of uncertainty in their ft values. Method: Half-lives of F17 and Cl33 were determined using β counting of implanted radioactive ion beam samples on a moving tape transport system at the Système de Production d'Ions Radioactifs Accélérés en Ligne low-energy identification station at the Grand Accélérateur National d'Ions Lourds. Results: The F17 half-life result, 64.347 (35) s, precise to ±0.05%, is a factor of 5 times more precise than the previous world average. The half-life of Cl33 was determined to be 2.5038 (22) s. The current precision of ±0.09% is nearly 2 times more precise compared to the previous world average. Conclusions: The precision achieved during the present measurements implies that the half-life no longer dominates the uncertainty of the ft values for both T=1/2 mirror decays F17 and Cl33.

Published
2015

22. High-precision half-life measurement for the isospin T = 1/2 mirror $\beta^+$ decay of $^{21}$Na

Author

Grinyer, J., Grinyer, G.F., Babo, M., Bouzomita, H., Chauveau, P., Delahaye, P., Dubois, M., Frigot, R., Jardin, P., Leboucher, C., Maunoury, L., Seiffert, C., Thomas, J.C., Traykov, E., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), ISOLDE, CERN, CERN [Genève], GANILEXP, and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
21.10.Tg, 23.40.−s, 27.30.+t, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Accepted for publication in Physical Review C; International audience; The half-life of the isospin T = 1/2 mirror $\beta^+$ decay of 21Na was measured at the GANIL-SPIRAL radioactive ion beam facility to be T1=2 = 22.422 (10) s, a result that is more than afactor of 5 times more precise than the previous world average, with a resulting ft value that isnow two times more precise. The precision of this new result implies that the half-life is no longerthe dominant source of uncertainty in the Ft value used in the calculation of Vud from mirrordecays to test the conserved vector current hypothesis of the Standard Model. The value of Vuddeduced from mirror decays using the new half-life result is now in better agreement with the Vudderived from T = 1 superallowed 0+ to 0+ transitions.

Published
2015
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23. High-precision half-life measurement for the isospin T=1/2 mirror β+ decay of $^{21}$Na

Author

Grinyer, J, Grinyer, G F, Babo, M, Bouzomita, H, Chauveau, P, Delahaye, P, Dubois, M, Frigot, R, Jardin, P, Leboucher, C, Maunoury, L, Seiffert, C, Thomas, J C, and Traykov, E

Subjects
Nuclear Physics - Experiment
Abstract

The half-life of the isospin T=1/2 mirror β+ decay of Na21 was measured at the GANIL-SPIRAL radioactive ion beam facility to be T1/2=22.422 (10) s, a result that is more than a factor of 5 times more precise than the previous world average, with a resulting ft value that is now two times more precise. The precision of this new result implies that the half-life is no longer the dominant source of uncertainty in the Ft value used in the calculation of Vud from mirror decays to test the conserved vector current hypothesis of the standard model. The value of Vud deduced from mirror decays using the new half-life result is now in better agreement with the Vud derived from T=1 superallowed 0+ to 0+ transitions.

Published
2015

24. First online FEBIAD ion source results at SPIRAL/GANIL: New beams, intensities and precision half-life measurements of the T=1/2 mirror nuclei $^{17}$F, $^{21}$Na and $^{33}$Cl

Author

Grinyer, J., Delahaye, P., Chauveau, P., Grinyer, G.F., Thomas, J.C., Babo, M., Bouzomita, H., Dubois, M., Jardin, P., Leboucher, C., Maunoury, L., Seiffert, C., Stora, T., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), European Organization for Nuclear Research (CERN), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Lion, Michel

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2014

25. First inverse-kinematics fission measurements in a gaseous active target

Author

Rodríguez-Tajes, C., primary, Farget, F., additional, Acosta, L., additional, Alvarez-Pol, H., additional, Babo, M., additional, Boulay, F., additional, Caamaño, M., additional, Damoy, S., additional, Fernández-Domínguez, B., additional, Galaviz, D., additional, Grinyer, G.F., additional, Grinyer, J., additional, Harakeh, M.N., additional, Konczykowski, P., additional, Martel, I., additional, Pancin, J., additional, Randisi, G., additional, Renzi, F., additional, Roger, T., additional, Sánchez-Benítez, A.M., additional, Teubig, P., additional, and Vandebrouck, M., additional

Published
2017
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26. Measurement of cross-sections of deuteron-induced reactions on Ni and Zn

Author

Grinyer, J., Lion, Michel, Grand Accélérateur National d'Ions Lourds (GANIL), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

Cross-section measurement by activation

Published
2014

27. Yields for the Future SPIRAL 1 & 2 Facilities from Online Experiments

Author

Grinyer, J., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Lion, Michel

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2013

28. UCx Target Release Characteristics from Offline Measurements for the SPIRAL2 Project

Author

Grinyer, J., Franberg-Delahaye, H., Delahaye, P., Grand Accélérateur National d'Ions Lourds (GANIL), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Lion, Michel

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Published
2013

29. High-precision half-life measurements for the superallowed Fermiβ+emitterNe18

Author

Laffoley, A. T., primary, Svensson, C. E., additional, Andreoiu, C., additional, Ball, G. C., additional, Bender, P. C., additional, Bidaman, H., additional, Bildstein, V., additional, Blank, B., additional, Cross, D. S., additional, Deng, G., additional, Varela, A. Diaz, additional, Dunlop, M. R., additional, Dunlop, R., additional, Garnsworthy, A. B., additional, Garrett, P. E., additional, Giovinazzo, J., additional, Grinyer, G. F., additional, Grinyer, J., additional, Hackman, G., additional, Hadinia, B., additional, Jamieson, D. S., additional, Jigmeddorj, B., additional, Kisliuk, D., additional, Leach, K. G., additional, Leslie, J. R., additional, MacLean, A. D., additional, Miller, D., additional, Mills, B., additional, Moukaddam, M., additional, Radich, A. J., additional, Rajabali, M. M., additional, Rand, E. T., additional, Thomas, J. C., additional, Turko, J., additional, Unsworth, C., additional, and Voss, P., additional

Published
2015
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30. High-Precision Half-Life Measurements for the Superallowed Fermi β+ Emitters 14O and 18Ne

Author

Laffoley, A. T., primary, Andreoiu, C., additional, Austin, R. A. E., additional, Ball, G. C., additional, Bender, P. C., additional, Bidaman, H., additional, Bildstein, V., additional, Blank, B., additional, Bouzomita, H., additional, Cross, D. S., additional, Deng, G., additional, Varela, A. Diaz, additional, Dunlop, M. R., additional, Dunlop, R., additional, Finlay, P., additional, Garnsworthy, A. B., additional, Garrett, P., additional, Giovinazzo, J., additional, Grinyer, G. F., additional, Grinyer, J., additional, Hadinia, B., additional, Jamieson, D. S., additional, Jigmeddorj, B., additional, Ketelhut, S., additional, Kisliuk, D., additional, Leach, K. G., additional, Leslie, J. R., additional, MacLean, A., additional, Miller, D., additional, Mills, B., additional, Moukaddam, M., additional, Radich, A. J., additional, Rajabali, M. M., additional, Rand, E. T., additional, Svensson, C. E., additional, Tardiff, E., additional, Thomas, J. C., additional, Turko, J., additional, Voss, P., additional, and Unsworth, C., additional

Published
2015
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31. High-precision half-life measurement for the isospinT=1/2mirrorβ+decay ofNa21

Author

Grinyer, J., primary, Grinyer, G. F., additional, Babo, M., additional, Bouzomita, H., additional, Chauveau, P., additional, Delahaye, P., additional, Dubois, M., additional, Frigot, R., additional, Jardin, P., additional, Leboucher, C., additional, Maunoury, L., additional, Seiffert, C., additional, Thomas, J. C., additional, and Traykov, E., additional

Published
2015
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32. Improved 2-DE of microorganisms after acidic extraction

Author

Herbert, BR, Grinyer, J, McCarthy, JT, Isaacs, M, Harry, EJ, Nevalainen, H, Traini, MD, Hunt, S, Schulz, B, Laver, M, Goodall, AR, Packer, J, Harry, JL, and Williams, KL

Subjects
Trichoderma, Saccharomyces cerevisiae, Ascorbic Acid, Hydrogen-Ion Concentration, Citric Acid, Mass Spectrometry, Analytical Chemistry, Cell Wall, Escherichia coli, Phosphoric Acids, Electrophoresis, Gel, Two-Dimensional, Artifacts, Acids, Bacillus subtilis
Abstract

2-DE separations of protein extracts sometimes have problems with poor resolution and streaking. This problem is particularly apparent with microorganisms, most notably those with a large cell wall. Here we describe a novel, rapid protocol for the extraction of microorganisms in acidic conditions, leading to increased resolution and 2-D gel quality. The efficiency of the protocol is demonstrated with extracts of bacteria, Escherichia coli and Bacillus subtilis; fungus, Trichoderma harzianum and yeast, Saccharomyces cerevisiae. We also demonstrate using a membrane centrifugal filtration, that large acidic molecules in excess of 100 kDa, probably including cell wall material, are responsible for the separation difficulties. A range of acidic extraction conditions were investigated, and it was found that optimal extraction is achieved using an extraction solution acidified to pH 3 by 80 mM citric acid. These findings have significant implications for the proteomic study of many medically, agriculturally and environmentally significant microorganisms, as the cell walls of these organisms are often considerably more complex than many commonly studied laboratory strains. © 2006 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Published
2006

36. High-precision half-life measurements of the T=1/2 mirror β decays 17F and 33Cl.

Author

Grinyer, J., Grinyer, G. F., Babo, M., Bouzomita, H., Chauveau, P., Delahaye, P., Dubois, M., Frigot, R., Jardin, P., Leboucher, C., Maunoury, L., Seiffert, C., Thomas, J. C., and Traykov, E.

Subjects
*RADIOACTIVE decay, *NUCLEAR reactions, *ION beams, *HALF-life (Nuclear physics), *RADIOACTIVITY
Abstract

Background: Measurements of the ft values for T = 1/2 mirror β+ decays offer a method to test the conserved vector current hypothesis and to determine Vud, the up-down matrix element of the Cabibbo-Kobayashi-Maskawa matrix. In most mirror decays used for these tests, uncertainties in the ft values are dominated by the uncertainties in the half-lives. Purpose: Two precision half-life measurements were performed for the T = ½ β+ emitters, 17F and 33Cl, in order to eliminate the half-life as the leading source of uncertainty in their ft values. Method: Half-lives of 17F and 33Cl were determined using β counting of implanted radioactive ion beam samples on a moving tape transport system at the Système de Production d'Ions Radioactifs Accélérés en Ligne low-energy identification station at the Grand Accélérateur National d'Ions Lourds. Results: The 17F half-life result, 64.347 (35) s, precise to ±0.05%, is a factor of 5 times more precise than the previous world average. The half-life of 33Cl was determined to be 2.5038 (22) s. The current precision of ±0.09% is nearly 2 times more precise compared to the previous world average. Conclusions: The precision achieved during the present measurements implies that the half-life no longer dominates the uncertainty of the ft values for both T = 1/2 mirror decays 17F and 33Cl. [ABSTRACT FROM AUTHOR]

Published
2015
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37. High-precision half-life measurement for the isospin T = 1/2 mirror β+ decay of 21Na.

Author

Grinyer, J., Grinyer, G. F., Babo, M., Bouzomita, H., Chauveau, P., Delahaye, P., Dubois, M., Frigot, R., Jardin, P., Leboucher, C., Maunoury, L., Seiffert, C., Thomas, J. C., and Traykov, E.

Subjects
*SODIUM, *HALF-life (Nuclear physics), *RADIOACTIVE decay, *ISOBARIC spin, *NUCLEAR reactions, *RADIOACTIVE nuclear beams, *STANDARD model (Nuclear physics)
Abstract

The half-life of the isospin T = 1/2 mirror β+ decay of21 Na was measured at the GANIL-SPIRAL radioactive ion beam facility to be T1/2 = 22.422 (10) s, a result that is more than a factor of 5 times more precise than the previous world average, with a resulting ft value that is now two times more precise. The precision of this new result implies that the half-life is no longer the dominant source of uncertainty in the Ft value used in the calculation of Vud from mirror decays to test the conserved vector current hypothesis of the standard model. The value of Vud deduced from mirror decays using the new half-life result is now in better agreement with the Vud derived from T = 1 superallowed 0+ to 0+ transitions. [ABSTRACT FROM AUTHOR]

Published
2015
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38. β‐elimination: An unexpected artefact in proteome analysis

Author

Herbert, Ben, primary, Hopwood, Femia, additional, Oxley, David, additional, McCarthy, John, additional, Laver, Matt, additional, Grinyer, J., additional, Goodall, A., additional, Williams, Keith, additional, Castagna, Annalisa, additional, and Righetti, Pier Giorgio, additional

Published
2003
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40. Relevant Criterion Rates in Capital Budgeting.

Author

Grinyer, J. R.

Subjects
CAPITAL budget, INVESTMENTS, OPPORTUNITY costs, FINANCE, RATIONING, CAPITAL investments
Abstract

This paper develops, using graphical analysis, a series of models relating immediate investment opportunities to various investment opportunity costs and the costs of financing. The block nature of much long-term finance is recognized in the analysis and the situations in which different concepts are relevant to the establishment of criterion rates, when capital rationing does not exist, are identified. The author recommends that, in the absence of capital rationing or strongly held expectations of increases in financing costs in the near future, in practice criterion rates be based on the weighted average cost of the marginal set of finance. [ABSTRACT FROM AUTHOR]

Published
1974
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41. Direct Detection of 1,1-Diphenyl-2-neopentylsilene and the Effects of Solvent Polarity on Its Reactivity with Nucleophiles

Author

Owens, T. R., Grinyer, J., and Leigh, W. J.

Abstract

The reactivity of the transient silene 1,1-diphenyl-2-neopentylsilene (4) has been studied in various solvents by laser flash photolysis methods, using trans-1,1,3,3-tetraphenyl-2,4-dineopentyl-1,3-disilacyclobutane as the precursor. Silene 4 exhibits a lifetime of ca. 250 μs and a UV absorption maximum of λmax = 335 nm (ε = 10000 ± 2900 M-1 cm-1) in dry, deoxygenated hexane, where it undergoes head-to-tail dimerization and reacts with oxygen with absolute rate constants of kdim = (5 ± 2) × 108 M-1 s-1 and kO2 = (6.5 ± 0.8) × 105 M-1 s-1, respectively. Identical absorption maxima are exhibited by 4 in 1,2-dichloroethane, tetrahydrofuran, and acetonitrile solution, indicating that the silene does not form detectable Lewis acid−base complexes with these solvents, thus making it possible to study the effects of solvent polarity on silene reactivity for the first time. Accordingly, absolute rate constants for reaction of 4 with acetone, methanol, acetic acid, 2,2,2-trifluoroethanol, and n-butylamine have been determined as a function of temperature in two or more of the four solvents. The results are compared to previously reported data for 1,1-diphenylsilene (2a) and show that the 2-neopentyl substituent in 4 enhances the reactivity of the Si&dbd;C bond with oxygen, but reduces its reactivity with nucleophilic reagents and toward [2+2]-dimerization by as much as a factor of 103. As with 2a, the Arrhenius parameters for the reactions of 4 are consistent with stepwise mechanisms, initiated by reversible complexation between the nucleophile and the silene, followed by H-transfer. The absolute rate constants at 25 °C vary by only a factor of 3−10 with solvent in each case, but there is a general trend toward increasingly positive Arrhenius activation energies and pre-exponential factors with increasing solvent polarity. The mechanistic ramifications of these results are discussed.

Published
2005

44. True and Fair - Time for the ASC to Act

Author

Grinyer, J.

Subjects
Accounting -- United Kingdom, Accounting -- Methods, Accounting -- Standards, Banking, finance and accounting industries, Business
Abstract

The United Kingdom's Accounting Standards Committee (ASC) has obtained clarification of 'true and fair' view as it is used in the Companies Act of 1981. The interpretation explained the term as an abstract concept, yet stated that, in practice, it is considered to have been met if the accountant has followed GAAP. But, it is assumed that a greater responsibility was intended by using 'true and fair' than simply stating GAAP. The purpose of the balance sheet is still disputed; some claim it portrays historical value and others believe current value of a company's assets. The Counsel's opinion leaves the profession with the responsibility of defining the term. Even though this is a difficult task, the term should be adequately defined.

Published
1984

45. Matching And Incorrigibility—reconsideration And Proposals

Author

Grinyer, J. R. and Kouhy, R.

Abstract

The apparently arbitrary allocation of many costs in conventional accounting 'matching' practice is a long-standing, unresolved and potentially important problem. Thomas (1974) argued that all matching-based allocations are 'incorrigible'. This paper discusses the issues and proposes modifications to, and interpretations of, current practice that attempt to alleviate the problem. The analysis proposes an incremental development, rather than the introduction of very radical proposals. Consequently it proceeds on the basis of the generally accepted accounting principles of conventional accounting, which may be expected to reflect the perceptions of practitioners and are incorporated in company law. Copyright 1993, 1999 Academic Press

Published
1993
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46. The Impact Of Financial Reporting On Revenue Investment: Theory And Evidence

Author

Grinyer, J. R., Collison, D. J., and Russell, A.

Abstract

This paper, (a) discusses possible motivations of top management in publicly quoted companies for increasing or decreasing expenditure on research, development, advertising and training; (b) presents hypotheses that such managers will adjust their level of spending on the items of 'revenue investments' listed in (a) to attempt to report earnings which will be in line with capital market expectations; and (c) considers and analyses empirical evidence from a survey of finance directors which is mainly consistent with the hypotheses. The survey also elicited the opinions of finance directors as to the basis of valuation used by the capital market. It was found that different beliefs concerning the market's use of short-term earnings were significantly associated with differing responses regarding expenditure on the investigated categories of revenue investment. Copyright 1994, 1999 Academic Press

Published
1994
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47. The neutrons for science facility at SPIRAL-2

Author

Ledoux, X., Aïche, M., Avrigeanu, M., Avrigeanu, V., Balanzat, E., Ban-D’Etat, B., Ban, G., Bauge, E., Bélier, G., Bém, P., Borcea, C., Caillaud, T., Chatillon, A., Czajkowski, S., Dessagne, P., Doré, D., Fischer, U., Frégeau, M. O., Grinyer, J., Guillous, S., Gunsing, F., Gustavsson, C., Henning, G., Jacquot, B., Jansson, K., Jurado, B., Kerveno, M., Klix, A., Landoas, O., Lecolley, F. R., Lecouey, J. L., Majerle, M., Marie, N., Materna, T., Mrázek, J., Negoita, F., Novák, J., Oberstedt, S., Oberstedt, A., Panebianco, S., Perrot, L., Plompen, A. J. M., Pomp, S., Prokofiev, A. V., Ramillon, J. M., Farget, F., Ridikas, D., Rossé, B., Sérot, O., Simakov, S. P., Šimečková, E., Štefánik, M., Sublet, J. C., Taïeb, J., Tarrío, D., Tassan-Got, L., Thfoin, I., and Varignon, C.

Subjects
7. Clean energy

49. Book Reviews.

Author

Lowe, E. A., Fawthrop, R. A., and Grinyer, J. R.

Subjects
MANAGEMENT, NONFICTION
Abstract

Reviews two books on management. "Management Control Systems: Text and Cases," 3rd edition, by R. N. Anthony; "Management Accounting: Text and Cases," 5th edition, by R. N. Anthony and J. S. Reece.

Published
1977
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50. High-precision half-life measurements for the superallowed Fermi β+ emitter 18Ne.

Author

Laffoley, A. T., Svensson, C. E., Andreoiu, C., Ball, G. C., Bender, P. C., Bidaman, H., Bildstein, V., Blank, B., Cross, D. S., Deng, G., Diaz Varela, A., Dunlop, M. R., Dunlop, R., Garnsworthy, A. B., Garrett, P. E., Giovinazzo, J., Grinyer, G. F., Grinyer, J., Hackman, G., and Hadinia, B.

Subjects
*HALF-life (Nuclear physics), *FERMI energy, *ISOTOPE separation, *COLLIDERS (Nuclear physics), *MEASUREMENT, *EXPERIMENTS
Abstract

The half-life of the superallowed Fermi β+ emitter 18Ne has been determined via two high-precision β counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Using two different 4π continuous-flow gas-proportional counters, two independent measurements were made, yielding a weighted average of T1/2=1.66400+0.00057-0.00048 s, which is consistent with but approximately 2 times more precise than a previous high-precision measurement based on γ-ray counting. The present work achieves ±0.034% precision for the 18Ne half-life and will enable the inclusion of 18Ne among the set of precisely measured superallowed Fermi β-decay ft values once improved measurements are made for its Q value and superallowed branching ratio. As a test of systematic uncertainties, the half-life of 23Ne was measured and the world average has been improved, by a factor of 1.7, to 37.148±0.032 s. [ABSTRACT FROM AUTHOR]

Published
2015
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