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418 results on '"Eijk, C. W. E."'

1. Search for the Radiative Capture d+d->^4He+\gamma Reaction from the dd\mu Muonic Molecule State

Author

Bogdanova, L. N., Bom, V. R., Demin, D. L., van Eijk, C. W. E., Filchenkov, V. V., Grafov, N. N., Grebinnik, V. G., Gritsaj, K. I., Konin, A. D., Kuryakin, A. V., Nazarov, V. A., Perevozchikov, V. V., Rudenko, A. I., Sadetsky, S. M., Vinogradov, Yu. I., Yukhimchuk, A. A., Yukhimchuk, S. A., Zinov, V. G., and Zlatoustovskii, S. V.

Subjects
Nuclear Experiment
Abstract

A search for the muon catalyzed fusion reaction dd --> ^4He +\gamma in the dd\mu muonic molecule was performed using the experimental \mu CF installation TRITON and NaI(Tl) detectors for \gamma-quanta. The high pressure target filled with deuterium at temperatures from 85 K to 800 K was exposed to the negative muon beam of the JINR phasotron to detect \gamma-quanta with energy 23.8 MeV. The first experimental estimation for the yield of the radiative deuteron capture from the dd\mu state J=1 was obtained at the level n_{\gamma}\leq 2\times 10^{-5} per one fusion., Comment: 9 pages, 3 Postscript figures, submitted to Phys. At. Nucl

Published
2002
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5. Experimental investigation of muon-catalyzed t + t fusion

Author

Bogdanova, L. N., Bom, V. R., Demin, A. M., Demin, D. L., van Eijk, C. W. E., Filchagin, S. V., Filchenkov, V. V., Grafov, N. N., Grishechkin, S. K., Gritsaj, K. I., Konin, A. D., Kuryakin, A. V., Medved’, S. V., Musyaev, R. K., Rudenko, A. I., Tumkin, D. P., Vinogradov, Yu. I., Yukhimchuk, A. A., Yukhimchuk, S. A., Zinov, V. G., and Zlatoustovskii, S. V.

Published
2009
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6. Experimental investigation of muon-catalyzed dt fusion in wide ranges of D/T mixture conditions

Author

Bom, V. R., Demin, A. M., Demin, D. L., van Eijk, C. W. E., Faifman, M. P., Filchenkov, V. V., Golubkov, A. N., Grafov, N. N., Grishechkin, S. K., Gritsaj, K. I., Klevtsov, V. G., Konin, A. D., Kuryakin, A. V., Medved’, S. V., Musyaev, R. K., Perevozchikov, V. V., Rudenko, A. I., Sadetsky, S. M., Vinogradov, Yu. I., Yukhimchuk, A. A., Yukhimchuk, S. A., Zinov, V. G., and Zlatoustovskii, S. V.

Published
2005
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9. Measurement of the Temperature Dependence of the ddμ-Molecule Formation Rate in Dense Deuterium at Temperatures 300–800 K

Author

Bom, V. R., Bradbury, J. N., Demin, D. L., van Eijk, C. W. E., Filchenkov, V. V., Grafov, N. N., Grebinnik, V. G., Gritsaj, K. I., Konin, A. D., Kuryakin, A. V., Nazarov, V. A., Perevozchikov, V. V., Rudenko, A. I., Sadetsky, S. M., Vinogradov, Yu. A., Yukhimchuk, A. A., Yukhimchuk, S. A., Zinov, V. G., and Zlatoustovskii, S. V.

Published
2001
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10. Experimental Results on Muon Catalyzed dt Fusion in H/D/T Mixture

Author

Averin, Yu. P., Bom, V. R., Demin, A. M., Demin, D. L., Drebushko, A. E., Dzhelepov, V. P., van Eijk, C. W. E., Filchenkov, V. V., Golubkov, A. N., Grafov, N. N., Grebinnik, V. G., Grishechkin, S. K., Klevtsov, V. G., Konin, A. D., Kukolkin, A. A., Medved', S. V., Modenov, A. B., Nazarov, V. A., Pryanichnikov, V. I., Rozhkov, V. Ia., Rudenko, A. I., Sadetsky, S. M., Semenchuk, G. G., Sidorov, V. T., Smirenin, Yu. V., Sukhoi, I. I., Travkin, V. V., Voropaev, N. I., Yukhimchuk, A. A., Zinov, V. G., and Zlatoustovskii, S. V.

Published
2001
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11. Investigation of the Parameters of Muon-Catalyzed Fusion in Double D/T Mixture at High Temperature and Density

Author

Bom, V. R., Bradbury, J. N., Davies, J. D., Demin, A. M., Demin, D. L., van Eijk, C. W. E., Filchenkov, V. V., Golubkov, A. N., Grafov, N. N., Grebinnik, V. G., Grishechkin, S. K., Gritsaj, K. I., Klevtsov, V. G., Konin, A. D., Kukolkin, A. A., Medved', S. V., Nazarov, V. A., Perevozchikov, V. V., Ponomarev, A. N., Rozhkov, V. Ya., Rudenko, A. I., Sadetsky, S. M., Smirenin, Yu. V., Voropaev, N. I., Yukhimchuk, A. A., Yukhimchuk, S. A., Zinov, V. G., and Zlatoustovskii, S. V.

Published
2001
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12. Pion correlations and resonance effects in $$\bar pp$$ annihilation at rest to 2π+2π-π0

Author

Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Farave, L., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Gabathuler, E., Garnet, R., Gerber, H. -J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., JonAnd, K., Kettle, P. -R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schäfer, M., Schaller, L. A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Van Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., Locher, M. P., Markushin, V. E., and CPLEAR Collaboration

Published
1999
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13. Direct determination of two-pion correlations for pp→ 2π+2π− annihilation at rest

Author

Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Carvalho, J., Cawley, E., Charalambous, S., Chardin, G., Chertok, M. B., Cody, A., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Evangelou, I., Faravel, L., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Garreta, D., Gerber, H. -J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Hubert, E., Jon-And, K., Kettle, P. -R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Liolios, A., Locher, M. P., Machado, E., Mandić, I, Manthos, N., Marel, G., Markushin, V. E., Mikuž, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Pinto da Cunha, J., Policarpo, A., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Sanders, P., Schäfer, M., Schaller, L. A., Schietinger, T., Schopper, A., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Van Beveren, E., Van Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Published
1998
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15. Quantum Phospors

Author

Vink, A. P., primary, Kolk, E., additional, Dorenbos, P., additional, and Eijk, C. W. E., additional

Published
2004
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17. Measurement ofCP violation parameters and test ofCPT invariance with $$\overline {K^0 } $$ and K0 at LEARand K0 at LEAR

Author

Adler, R., Alhalel, T., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bee, C. P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Bula, Ch., Carlson, P., Carroll, M., Carvalho, J., Cawley, E., Charalambous, S., Chardalas, M., Chardin, G., Chertok, M. B., Cody, A., Danielsson, M., Dedoussis, S., Dejardin, M., Derre, J., Duclos, J., Ealet, A., Eckart, B., Eleftheriadis, C., Evangelou, I., Faravel, L., Fassnacht, P., Faure, J. L., Felder, C., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Garreta, D., Gerber, H. -J., Go, A., Guyot, C., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Hubert, E., Jon-And, K., Kettle, P. -R., Kochowski, C., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Liolios, A., Machado, E., Mandić, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Nakada, T., Onofre, A., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Pinto da Cunha, J., Policarpo, A., Polivka, G., Rickenbach, R., Roberts, B. L., Rozaki, E., Ruf, T., Sakeliou, L., Sanders, P., Santoni, C., Sarigiannis, K., Schäfer, M., Schaller, L. A., Schopper, A., Schune, P., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Van Beveren, E., Van Eijk, C. W. E., Varner, G., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Yèche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Published
1996
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18. Inclusive measurement of $$\bar p$$ annihilation at rest in gaseous hydrogen to final states containingρ andf 2

Author

Adler, R., Alhalel, T., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bee, C. P., Behnke, O., Bennet, J., Bertin, V., Bienlein, J. K., Bloch, P., Bula, Ch., Carlson, P., Carvalho, J., Cawley, E., Charalambous, S., Chardalas, M., Chardin, G., Chertok, M. B., Danielsson, M., Cody, A., Dedoussis, S., Dejardin, M., Derre, J., Dodgson, M., Dousse, J. C., Duclos, J., Ealet, A., Eckart, B., Eleftheriadis, C., Evangelou, I., Faravel, L., Fassnacht, P., Faure, J. L., Felder, C., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Fuglesang, C., Gabathuler, E., Gamet, R., Garreta, D., Geralis, T., Gerber, H. -J., Go, A., Gumplinger, P., Guyot, C., Harrisch, P. F., Haselden, A., Hayman, P. J., Henry-Couannier, F., Heyes, W. G., Hollander, R. W., Jansson, K., Johner, H. U., Jon-And, K., Kerek, A., Kern, J., Kettle, P. R., Kochowski, C., Kokkas, P., Kreuger, R., Lawry, T., Le Gac, R., Liolios, A., Machado, E., Maley, P., Mandić, I., Manthos, N., Marel, G., Mikuž, M., Miller, J., Montanet, F., Nakada, T., Onofre, A., Pagels, B., Pavlopoulos, P., Pelucchi, F., Pinto da Cunha, J., Policarpo, A., Polivka, G., Postma, H., Richkenbach, R., Roberts, B. L., Rozaki, E., Ruf, T., Sacks, L., Sakeliou, L., Sanders, P., Santoni, C., Sarigiannis, K., Schäfer, M., Schaller, L. A., Schopper, A., Schune, P., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Tröster, D. A., Van Beveren, E., Van Eijk, C. W. E., Varner, G., Vlachos, S., Weber, P., Wigger, O., Witzig, C., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Published
1995
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19. Bose-Einstein correlations in $$\bar p$$ p annihilations at rest

Author

Adler, R., Alhalel, T., Angelopoulos, A., Apostolakis, A., Aslanides, E., Backenstoss, G., Bee, C. P., Behnke, O., Bennet, J., Bertin, V., Bienlein, J. K., Bloch, P., Bula, Ch., Carlson, P., Carvalho, J., Cawley, E., Charalambous, S., Chardalas, M., Chardin, G., Chertok, M. B., Danielsson, M., Cody, A., Dedoussis, S., Dejardin, M., Derre, J., Dodgson, M., Dousse, J. C., Duclos, J., Ealet, A., Eckart, B., Eleftheriadis, C., Evangelou, I., Faravel, L., Fassnacht, P., Faure, J. L., Felder, C., Ferreira-Marques, R., Fetscher, W., Fidecaro, M., Filipčič, A., Francis, D., Fry, J., Fuglesang, C., Gabathuler, E., Gamet, R., Garreta, D., Geralis, T., Gerber, H. -J., Go, A., Gumplinger, P., Guyot, C., Harrison, P. F., Haselden, A., Hayman, P. J., Henry-Couannier, F., Heyes, W. G., Hollander, R. W., Jansson, K., Johner, H. U., Jon-And, K., Kerek, A., Kern, J., Kettle, P. R., Kochowski, C., Kokkas, P., Kreuger, R., Lawry, T., Le Gac, R., Liolios, A., Machado, E., Maley, P., Mandić, I., Manthos, N., Marel, G., Mikuž, M., Miller, J., Montanet, F., Nakada, T., Onofre, A., Pagels, B., Pavlopoulos, P., Pelucchi, F., Pinto da Cunha, J., Policarpo, A., Polivka, G., Postma, H., Rickenbach, R., Roberts, B. L., Rozaki, E., Ruf, T., Sacks, L., Sakeliou, L., Sanders, P., Santoni, C., Sarigiannis, K., Schäfer, M., Schaller, L. A., Schopper, A., Schune, P., Soares, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Triantis, F., Troster, D. A., Van Beveren, E., Van Eijk, C. W. E., Varner, G., Vlachos, S., Weber, P., Wigger, O., Witzig, C., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Published
1994
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21. Experimental study of π− π+ system at low invariant-masses

Author

Kernel, G., Korbar, D., Križan, P., Mikuž, M., Sever, F., Stanovnik, A., Starič, M., Zavrtanik, D., Michaelis, E. G., Tanner, N. W., van Eijk, C. W. E., Hollander, R. W., Lourens, W., Clark, S. A., Davies, J. D., Lowe, J., Playfer, S. M., Jovanovich, J. V., and Omicron Collaboration

Published
1991
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22. Measurement of the reaction π+ p→π+π+ n near threshold

Author

Kernel, G., Korbar, D., Križan, P., Mikuž, M., Seljak, U., Sever, F., Stanovnik, A., Starič, M., Zavrtanik, D., van Eijk, C. W. E., Hollander, R. W., Lourens, W., Michaelis, F. G., Tanner, N. W., Clark, S. A., Jovanovich, J. V., Davies, J. D., Lowe, J., Playfer, S. M., and OMICRON Collaboration

Published
1990
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24. Luminescence quenching by photoionization and electron transport in a LaAlO3:Ce3+ crystal.

Author

van der Kolk, E., de Haas, J. T. M., Bos, A. J. J., van Eijk, C. W. E., and Dorenbos, P.

Subjects
PHOTOCONDUCTIVITY, ABSORPTION, THERMOLUMINESCENCE, CERIUM, FLUORIMETRY, CONDUCTION bands
Abstract

A combined photoconductivity, absorption, and thermoluminescence study was performed to understand the absence of luminescence from Ce3+ in LaAlO3:Ce3+. It is demonstrated that the absence of luminescence is the result of Ce3+ ionization from the 5d excited states, which are all located in the conduction band. Ce3+ ionization is accompanied by the formation of several broad absorption and photoconductivity bands, which are assigned to electron traps. A time and temperature dependent optical investigation of these traps reveals the conditions under which electrons are transferred from Ce3+ to traps and vice versa, from traps back to Ce4+. The observed difference in energy needed to thermally or optically release electrons from traps is qualitatively explained in terms of the location of the ground and excited states of the electron traps with respect to the conduction band. [ABSTRACT FROM AUTHOR]

Published
2007
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25. High-light-output scintillator for photodiode readout: LuI3:Ce3+.

Author

Birowosuto, M. D., Dorenbos, P., van Eijk, C. W. E., Krämer, K. W., and Güdel, H. U.

Subjects
SCINTILLATORS, PHOTODIODES, ELECTRONS, RADIATION, SINGLE-photon emission computed tomography, PHOTONS
Abstract

In this paper, we investigated the scintillation properties of LuI3:Ce3+. Radioluminescence, light output, energy resolution, and γ-scintillation decay are reported. We find an extremely high light output of 98 000±10 000 photons/MeV. LuI3:Ce3+ also gives a very high electron-hole (e-h) pair response when it is coupled with an avalanche photodiode (APD) (92 000±9000 e-h pairs/MeV). With an APD, a best energy resolution (full width at half maximum over the peak position) of 3.3%±0.3% for 662 keV γ quanta is observed. A combination of an extremely high light output and a good energy resolution makes LuI3:Ce3+ an ideal scintillator for radiation sensor applications. Some drawbacks due to the hygroscopicity and the difficult growth of LuI3:Ce3+ crystals are also discussed. [ABSTRACT FROM AUTHOR]

Published
2006
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26. Storage properties of Ce3+ doped haloborate phosphors enriched with 10B isotope.

Author

Sidorenko, A. V., Bos, A. J. J., Dorenbos, P., van Eijk, C. W. E., Rodnyi, P. A., Berezovskaya, I. V., Dotsenko, V. P., and Popov, A. I.

Subjects
PHOSPHORS, THERMAL neutrons, LUMINESCENCE, THERMOLUMINESCENCE, NEUTRON irradiation, PHYSICS
Abstract

In this work we investigated the suitability of newly synthesized series of haloborate phosphors with the general formula M2B5O9X:Ce3+ (M=Sr or Ca; X=Br or Cl) for thermal neutron detection and with reduced sensitivity to γ background. Storage properties such as yield of photostimulated luminescence (PSL) and thermoluminescence are reported. Based on these results the series of the haloborates with 99% enrichment of 10B was sensitized to increase neutron sensitivity. The PSL yields of enriched with 10B haloborates were compared with a common mixture of BaFBr:Eu2+ (40 wt %) and Gd2O3 (60 wt %) under γ and neutron irradiation. The PSL light yield from Ca2 10B5O9Cl:Ce,Na phosphor after neutron irradiation is 16 times less than that from BaFBr:Eu2+xGd2O3. However, the neutron to γ discrimination of Ca2 10B5O9Cl:Ce,Na (1%) is almost an order of magnitude better than that of BaFBr:Eu2+×Gd2O3. Therefore, haloborate phosphors should be more suitable when utilized in environments with a high γ background. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2004
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27. Luminescence excitation study of the higher energy states of Pr3+ and Mn2+ in SrAlF5, CaAlF5, and NaMgF3.

Author

van der Kolk, E., Dorenbos, P., van Eijk, C. W. E., Vink, A. P., Weil, M., and Chaminade, J. P.

Subjects
PHOSPHORS, PHOTONS, SYNCHROTRON radiation, ULTRAVIOLET radiation, QUANTUM theory, PHYSICS
Abstract

The possibility to use Mn2+ co-doping to modify the emission properties of Pr3+-based quantum cutting phosphors—i.e., phosphors that emit one UV and one visible photon for each absorbed vacuum UV (VUV) photon—into phosphors that emit two visible photons, was studied experimentally. In this respect a luminescence excitation study, using synchrotron radiation, between 500 and 50 nm of Pr3+ and Mn2+ impurities in SrAlF5, CaAlF5, and NaMgF3 was performed. Excitation of Pr3+ into the 4f5d excited states results in emission of UV photons from the 1S0 state followed by visible photons from the 3P0 state with an internal quantum efficiency exceeding 100%. It was found that a favorable overlap between the 1S0→1I6 Pr3+ emission and the 6A1→4Eg, 4A1g Mn2+ absorption exists that should promote energy transfer from Pr3+ to Mn2+. However no such energy transfer could be observed in SrAlF5. At higher excitation energies (>7 eV) intense structured Mn2+ excitation bands are found that are assigned to 3d5→3d44s transitions, Mn2+ related charge transfer transitions, and Mn2+ bound excitons. These bands have an unfavorable overlap with the Pr3+ 4f5d states, preventing efficient selective Pr3+ excitation, prerequisite for the quantum cutting process. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2004
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28. The Identification of p̄p K X-Rays at LEAR

Author

Baker, C. A., Batty, C. J., Davies, J. D., Van Eijk, C. W. E., Marques, R. Ferreira, Hollander, R. W., Langerveld, D., Lingeman, E. W. A., Lowe, J., Moir, J., Nelson, J. M., Okx, W. J. C., Pyle, G. J., Sakamoto, S., Selvarajah, A., Squier, G. T. A., Welsh, R. E., Winter, R. G., Zoutendijk, A., Zichichi, Antonino, editor, Bloch, P., editor, Pavlopoulos, P., editor, and Klapisch, R., editor

Published
1987
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30. Scintillation Properties of La[Cl.sup.3]:[Ce.sup.3+] Crystals: Fast, Efficient, and High-Energy Resolution Scintillators

Author

van Loef, E. V. D., Dorenbos, P., van Eijk, C. W. E., Kramer, K., and Gudel, H. U.

Subjects
Spectrophotometry -- Analysis, Crystals -- Analysis, Nuclear energy -- Analysis, Gamma rays -- Analysis, Business, Electronics, Electronics and electrical industries
Abstract

The scintillation properties of La[Cl.sup.3] doped with different [Ce.sup.3+] concentrations studied by means of optical, [Gamma]-ray, and [Gamma]-ray excitation are presented. Under optical and [Gamma]-ray excitation, [Ce.sup.3+] emission is observed peaking at 330 and 352 nm. For La[Cl.sup.3] doped with 2%, 4%, 10%, and 30% [Ce.sup.3+] and pure Ce[Cl.sup.3], we measured a light yield of 46 000 [+ or -] 3000 photons per MeV of absorbed [Gamma]-ray energy. The scintillation decay curve can be described by three decay components: short ([Tau] = 25 ns), intermediate ([Tau] = 200 - 800 ns), and long ([Tau] = 0.8-14 [micro]s). The contribution of the short decay component to the total light yield increases with [Ce.sup.3+] concentration: ranging from 10% for La[Cl.sup.3]: 2% [Ce.sup.3+] to 69% for pure Ce[Cl.sup.3]. An energy resolution (full-width half-maximum over peak position) for the 662-kev full energy peak of 3.5 [+ or -] 0.4%, 3.5 [+ or -] 0.4%, 3.1 [+ or -] 0.3%, 3.3 [+ or -] 0.3%, and 3.4 [+ or -] 0.3%, respectively, was observed for La[Cl.sup.3]: 2%, 4%, 10%, 30% [Ce.sup.3+] and pure Ce[Cl.sup.3]. Index Terms--Energy resolution, Gamma-detection, La[Cl.sup.3]:Ce, PACS: 29.40 Mc; 2930 Kv; 78.55 Hx, rare-earth trihalides, scintillators.

Published
2001

31. Multi-Anode Sawtooth SDD for X-Ray Spectroscopy Fabricated on NTD Wafers

Author

Sonsky, J., Hollander, R. W., van Eijk, C. W. E., Sarro, P. M., and Kouchpil, V.

Subjects
Detectors -- Research, X-ray spectroscopy -- Research, Business, Electronics, Electronics and electrical industries
Abstract

We are developing a multi-anode sawtooth silicon drift detector (MSSDD) with an anode pitch of 250 [micro]m for one-dimensional position-sensitive detection of low-energy X-rays down to ~200 eV. The detector is intended to be used in X-ray diffraction analysis. In this paper, we present new results of X-ray spectroscopy measurements with detectors fabricated on neutron transmutation doped (NTD) wafers with a thickness of 290 [micro]m. Using an MSSDD with an anode pitch of 250 [micro]m and having [p.sup.+] strips on both sides, we have measured an energy resolution of 191-eV full-width half-maximum (FWHM) per anode pixel for the 5.89 keV line of [sup.55]Fe at 213 K. At room temperature the energy resolution is 375 eV FWHM. Split events are almost completely eliminated due to the sawtooth-shaped [p.sup.+] strips. Index Terms--Charge sharing, multi-anode linear drift detectors, sawtooth design, X-ray spectroscopy.

Published
2001

32. Scintillation Properties of Rb[Gd.sub.2] [Br.sub.7]:Ce Advantages and Limitations

Author

Guillot-Noel, O., van't Spijker, J. C., de Haas, J. T. M, Dorenbos, P., van Eijk, C. W. E., Kramer, K. W., and Gudel, H. U.

Subjects
Nuclear research -- Evaluation, Nuclear engineering -- Research, Business, Electronics, Electronics and electrical industries
Abstract

The scintillation properties of Rb[Gd.sub.2][Br.sub.7] crystals, doped with [Ce.sup.3+] concentrations of 0.02, 0.11, 0.88, 2.05, 4.1, and 9.8%, are studied under X-ray and [Gamma]-quanta excitations. For the Rb[Gd.sub.2][Br.sub.7] sample doped with 9.8% Ce, the authors measured a light yield of 56 000 [+ or -] 6000 photons per MeV of absorbed [Gamma]-ray energy with a main decay time of 43 [+ or -] 1 ns, using a Hamamatsu R1791 photomultipler (PMT), a [sup.137]Cs radioactive source, and a shaping time of 10 [micro]s. A time resolution of 790 [+ or-] 10 ps was measured for the Rb[Gd.sub.2][Br.sub.7] : 9.8% Ce compound, using [Baf.sub.2] as second scintillator, two XP2020Q PMT's, a [sup.22]Na source, and an energy threshold set at E [is greater than or equal to] 511 keV. With the R1791 PMT, an energy resolution of 4.1% (FWHM over peak position) for the 662-kev full absorption peak has been observed for two crystals of 7 x 4 x 2 [mm.sup.3] and 15 x 5 x 1 [mm.sup.3] with 4.1 and 9.8% Ce content, respectively. Moreover, the nonproportional responses of three Rb[Gd.sub.2][Br.sub.7] : Ce compounds with different concentrations (0.11, 2.05, and 9.8%) were studied revealing an almost-constant light output response from 17.4 kev to 1 MeV. These properties are compared to three other well-known scintillators: NaI:Tl, CsI:Tl, and [Lu.sub.2]Si[O.sub.5]:Ce. Index Terms--Energy resolution, [Gamma]-ray detection, nonproportionality, rare-earth halides, scintillation crystals, time resolution.

Published
1999

33. Contribution of CPLEAR to the physics of the neutral-kaon system

Author

Pavlopoulos, P, Adler, R, Alhalel, T, Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bee, C P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Carvalho, J, Cawley, E, Charalambous, S, Chardin, G, Chertok, M B, Cody, A, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eckart, B, Eleftheriadis, C, Evangelou, I, Faravel, L, Fassnacht, P, Felder, C, Ferreira-Marques, R, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Garreta, D, Gerber, H J, Go, A, Guyot, C, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Hubert, E, Jon-And, K, Kettle, P R, Kochowski, Claude, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Liolios, A, Machado, E, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pinto da Cunha, J, Policarpo, Armando, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Sakelliou, L, Sanders, M P, Santoni, C, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Schune, P, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, Triantis, F A, Van Beveren, E, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Yéche, C, Zavrtanik, D, and Zimmerman, D

Subjects
s mass difference, k-0, Physics, cp-violation, Nuclear and High Energy Physics, Particle physics, CPT symmetry, Direct method, semileptonic decays, High Energy Physics::Phenomenology, violation parameter eta(+-), Nuclear physics, tagged (k)over-bar(0), CP violation, High Energy Physics::Experiment, Limit (mathematics), Particle Physics - Experiment
Abstract

We report the results of the CPLEAR experiment on CP-, T-, and CPT-symmetries in the neutral kaon system. CP-violation parameters are given for the K-0, (K) over bar(0) --> 2 pi, 3 pi decay channels. For the first time, T-violation is measured by a direct method using semileptonic decays. The CPT symmetry is tested through the parameters Im(delta) with a precision of 10(-5) and Re(delta) with a precision of a few 10(-4). With these two measurements, the difference in mass and width of K-0 and (K) over bar(0) are bound to within 10(-18) GeV. In the limit of CPT invariance in the neutral kaon decays, the K-0 and (K) over bar(0) masses are equal within 10(-19) GeV. Nuclear Physics A

Published
1999
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34. The neutral kaon decays to $\pi^+ \pi^- \pi^0$ : a detailed analysis of the CPLEAR data

Author

Angelopoulos, Angelos, Apostolakis, Alcibiades J, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Faravel, L, Fassnacht, P, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D

Subjects
Physics, Particle physics, Chiral perturbation theory, Physics and Astronomy (miscellaneous), Branching fraction, High Energy Physics::Phenomenology, Dalitz plot, Lambda, Amplitude, Isospin, CP violation, High Energy Physics::Experiment, Engineering (miscellaneous), Particle Physics - Experiment, Energy (signal processing)
Abstract

A detailed analysis of neutral kaons decaying to \(\pi^{+}\pi^{-}\pi^{0}\) is presented based on the complete data set containing half a million events. Time-dependent decay rate asymmetries are measured between initially tagged \({\mathrm{{K}\mbox{}^0}}\) and \({\mathrm{\overline{K}\mbox{}^0}}\) and for different regions of the phase space. These asymmetries, resulting from the interference between the CP-conserving decay amplitude of \({\mathrm{K_L}}\) and the decay amplitude of \({\mathrm{K_S}}\)– either CP-violating or CP-conserving – allow the determination of the \({\mathrm{K_S}}\) parameters \(\eta_{+-0}\) (CP-violating) and \(\lambda\) (CP-conserving), and also of the main isospin components of the \({\mathrm{K_S}}\) decay amplitude. The branching ratio of \({\mathrm{K_S}}\rightarrow \pi^{+}\pi^{-}\pi^{0}\) (CP-conserving) is deduced directly from \(\lambda\). In addition, we extract the slope parameters describing the energy dependence of the \({\mathrm{K_L}} \rightarrow \pi^{+}\pi^{-}\pi^{0}\) Dalitz plot. The whole set of our results fits well within the current phenomenological picture of the neutral-kaon system including CP violation and Chiral Perturbation Theory (ChPT).

Published
1998
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35. Thermal-neutron scintillator: Ce3+ activated Rb2LiYBr6.

Author

Birowosuto, M. D., Dorenbos, P., de Haas, J. T. M., van Eijk, C. W. E., Krämer, K. W., and Güdel, H. U.

Subjects
SCINTILLATION spectrometry, LUMINESCENCE, X-rays, NEUTRONS, THERMAL neutrons, NEUTRON counters
Abstract

Scintillation and luminescence characteristics of Rb2LiYBr6 doped with 0.1%, 0.5%, 1%, and 5% Ce3+ are presented. Under optical and x-ray excitation, Ce3+ doublet emission is observed at 385 and 420 nm. Rb2LiYBr6:0.5% Ce3+ shows very high thermal neutron scintillation light output of 83 000 photons/neutron. An excellent neutron peak resolution of 3.6% (full width at half maximum over peak position) is observed for the 4.8 MeV neutron-reaction products energy response in Rb2LiYBr6:0.1% Ce3+. This peak shows up at 3.6 MeV γ-equivalent energy and therefore it gives an α/β ratio of 0.74. The combination of a large fraction of neutron absorption in natural 6Li (62%), a sharp neutron response peak, high light yield, and large α/β ratio makes Rb2LiYBr6:Ce3+ an efficient scintillator for thermal neutron detection. [ABSTRACT FROM AUTHOR]

Published
2007
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39. Search for the Radiative Capture d+d->^4He+��Reaction from the dd��Muonic Molecule State

Author

Bogdanova, L. N., Bom, V. R., Demin, D. L., van Eijk, C. W. E., Filchenkov, V. V., Grafov, N. N., Grebinnik, V. G., Gritsaj, K. I., Konin, A. D., Kuryakin, A. V., Nazarov, V. A., Perevozchikov, V. V., Rudenko, A. I., Sadetsky, S. M., Vinogradov, Yu. I., Yukhimchuk, A. A., Yukhimchuk, S. A., Zinov, V. G., and Zlatoustovskii, S. V.

Subjects
FOS: Physical sciences, Nuclear Experiment (nucl-ex)
Abstract

A search for the muon catalyzed fusion reaction dd --> ^4He +��in the dd��muonic molecule was performed using the experimental ��CF installation TRITON and NaI(Tl) detectors for ��-quanta. The high pressure target filled with deuterium at temperatures from 85 K to 800 K was exposed to the negative muon beam of the JINR phasotron to detect ��-quanta with energy 23.8 MeV. The first experimental estimation for the yield of the radiative deuteron capture from the dd��state J=1 was obtained at the level n_��\leq 2\times 10^{-5} per one fusion., 9 pages, 3 Postscript figures, submitted to Phys. At. Nucl

Published
2002
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40. VUV excitation and 1So emission of Pr3+ in BaSiF6 and selecting host lattices with 1So Pr3+ emisssion

Author

Van Der Kolk, E., Dorenbos, P., Van Eijk, C. W. E., Vink, A. P., Fouassier, Claude, Guillen, François, Interfaculty Reactor Institute, Delft University of Technology (TU Delft), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), and Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB)

Subjects
Europium, Line emission, [CHIM.MATE]Chemical Sciences/Material chemistry, Exciton, Qantum splitting
Abstract

International audience; We have studied the luminescence characteristics of Pr3+ in BaSiF6 powder samples co-doped with K+ in the 60-800nm range at room and liquid He temperature. After excitation in the 4f5d configuration of Pr3+, emission from the 1S0 state is observed but no 4f5d→4f2 emission...

Published
2002
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41. Study of the background in the measuring station at the n_TOF facility at CERN: sources and solutions

Author

Zanini, L, Abbondanno, U, Aerts, G, Andriamonje, Samuel A, Andrzejewski, J, Angelopoulous, A, Assimakopoulos, Panayiotis, Bacri, C-O, Badurek, G, Berthoumieux, E, Baumann, P, Beer, H, Benlliure, J, Berthier, B, Bondarenko, I, Borcea, C, Bos, A J J, Boscolo-Marchi, E, Bustreo, N, Calviño, F, Cano-Ott, D, Capote, R, Carlson, P, Charpak, Georges, Chauvin, N, Cennini, P, Chepel, V, Colonna, N, Cortés, G, Cortina-Gil, D, Corvi, F, Cusmano, A, Dababneh, S, Dahlfors, M, Damianoglou, D, David, S, Dimovasili, E, Domingo, C, Doroshenko, A, Duran-Escribano, I, Eleftheriadis, C, Embid, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Frais-Kölbl, H, Furman, W, Fursov, B, Garzón, J A, Giomataris, Ioanis, Gledenov, Y, Gonzalez-Romero, E, Goverdovski, A, Gramegna, F, Griesmayer, E, Gunsing, F, Haefner, P, Haight, R, Heil, M, Herrera-martinez, A, Hollander, P, Ioannou, P, Isaev, S, Jericha, E, Kadi, Y, Kappeler, F, Karadimos, D, Karamanis, D, Kayukova, A, Kazakov, L, Kelic, A, Ketlerov, V, Kitis, G, Köhler, P E, Kopach, Y, Kossionides, E, Kroshkina, I, Lacoste, V, Lamboudis, C, Leeb, H, Leprêtre, A, Lopes, M, Lozano, M, Marrone, S, Martínez-Val, J M, Mastinu, P, Mengoni, A, Meunier, R, Mezentsev, A J, Milazzo, P, Minguez, E, Mitrofanov, V, Moreau, C, Müller, A, Nicolis, N, Nikolenkov, V, Oberhummer, Heinz, Pakou, A, Pancin, J, Papadopoulous, K, Papaevangelou, T, Paradela, C, Paradelis, T, Pavlik, A, Pavlopoulos, P, Perrez-Parra, A, Perriale, L, Perlado, J M, Peskov, Vladimir, Piksaikin, V, Plag, R, Plompen, A, Plukis, A, Poch, A, Policarpo, Armando, Popov, A, Popov, Y P, Pretel, C, Quesada, J M, Radermacher, E, Rapp, W, Rauscher, T, Reifarth, R, Rejmund, F, Rubbia, Carlo, Rudolf, G, Rullhusen, P, Sakelliou, L, Saldaña, F, Samylin, B, Savvidis, I, Savvidis, S, Sedyshev, P, Stéphan, C, Szalanski, P, Tagliente, G, Taín, J L, Tapia, C, Tassan-Got, L, Terchychnyi, R, Tsabaris, C, Tsangas, N, van Eijk, C W E, Vannini, G, Ventura, A, Villamarin, A, Vlachoudis, V, Vlastou, R, Voinov, A, Voss, F, Wendler, H, Wiescher, M, Wisshak, K, Zeinalov, S, and Zhuravlev, B

Subjects
Accelerators and Storage Rings
Abstract

A background roughly two orders of magnitude higher than tolerable was found in the n_TOF facility at CERN during the first measurements [1]. This note describes a series of additional measurements performed in the n_TOF experimental area to study the origin and the characteristics of the background. The program of these measurements was determined taking into account the results from the simulations carried out by the EET group [2]. A first phase of measurements confirmed what was expected from the simulations, namely that the dominant source of background was due to neutrons generated by negative muon capture. Actions to reduce the background were taken according to the results from both measurements and simulations. An iron shielding wall 3.2 m thick was then placed in between the sweeping magnet and the second collimator, with the purpose of stopping most of the muons. In a second phase of measurements, results showed that the additional shielding reduced the main component of the background by about a factor of 30.

Published
2001

42. Status report on n_TOF

Author

Pavlopoulos, P, Abbondanno, U, Andriamonje, E, Andrzejewski, J, Angelopoulos, Angelos, Assimakopoulos, P A, Bacri, C O, Badurek, G, Baumann, P, Beer, H, Berthier, B, Betev, B L, Bondarenko, I V, Borcea, C, Bos, A J, Bustreo, N, Calviño, F, Cano-Ott, D, Capote, R, Carlson, P J, Charpak, Georges, Chauvin, N, Cennini, P, Chepel, V Yu, Colonna, N, Cortés, G, Corvi, F, Dahlfors, M, Damianoglou, D, David, S, Dimovasili, E, Domingo, C, Doroshenko, A A, Durán-Escribano, I, Eleftheriadis, C, Embid, M, Ferrant, L, Ferrari, A, Ferreira-Marques, R, Frais-Kölbl, H, Furman, W I, Fursov, B, Garzón, J A, Giomataris, Ioanis, Gledenov, Yu M, González-Romero, E M, Goverdovski, A A, Gramegna, F, Griesmayer, E, Gunsing, F, Haight, R C, Heil, M, Hollander, P, Ioannides, K G, Ioannou, P, Isaev, S, Jericha, E, Kadi, Y, Käppeler, F K, Karadimos, D, Karamanis, D, Kayukov, A, Kazakov, L, Kelic, A, Ketlerov, V, Kitis, G, Köhler, P E, Kopach, Yu N, Kossionides, E, Kroshkina, I, Lacoste, V, Lamboudis, C, Leeb, H, Leprêtre, A, Lopes, M, Lozano, M, Marrone, S, Martínez-Val, J M, Mastinu, P, Mengoni, A, Meunier, R, Mezentseva, J, Milazzo, P M, Minguez, E, Mitrofanov, V P, Nicolis, N G, Nikolenko, V G, Oberhummer, Heinz, Pakou, A, Pancin, J, Papadopoulos, K, Papavangelou, T, Paradela, C, Paradelis, T, Pavlik, A, Pérez-Parra, A, Perriale, L, Perlado, J M, Peskov, Vladimir, Piksaikin, V M, Plag, R, Plompen, A, Poch, A, Policarpo, Armando, Popov, A, Popov, Yu P, Pretel, C, Quesada, J M, Radermacher, E, Rauscher, T, Reifarth, R, Rejmund, F, Rubbia, Carlo, Rudolf, G, Rullhusen, P, Sakelliou, L, Saldaña, F, Samylin, B, Savvidis, E, Savvidis, S, Schäfer, E, Sedyshev, P V, Stéphan, C, Szalanski, P, Tagliente, G, Taín, J L, Tapia, C, Tassan-Got, L, Terchychnyi, R, Tsabaris, C, Tsangas, N, van Eijk, C W E, Vannini, G, Ventura, A, Villamarin, A, Vlachoudis, V, Vlastou, R, Voinov, A V, Voss, F, Wendler, H, Wiescher, M, Wisshak, K, Yanini, L, Zeinalov, S S, and Zhuravlev, B

Subjects
Detectors and Experimental Techniques
Published
2001

43. $T$-violation and $CPT$-invariance measurements in the CPLEAR experiment: a detailed description of the analysis of neutral-kaon decays to $e\pi\nu$

Author

Angelopoulos, Angelos, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Müller, A, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Sakelliou, L, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D

Subjects
High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

A detailed description of the analysis of neutral kaons decaying to \pen\ is given, based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged \kn\ and \knb , time-dependent decay-rate asymmetries were measured. These asymmetries enabled \Tz - and \CPTz -violation parameters to be measured in the context of a systematic study. The highlights of this study are the first direct observation of \Tz\ violation and the direct determination of the \CPTz\ parameter \red\ with an accuracy improved by two orders of magnitude with respect to the current value.

Published
2001

44. $K^{0} \leftrightarrow \overline{K}^{0}$ transitions monitored by strong interactions : a new determination of the $K_{L}-K_{S}$ mass difference

Author

Angelopoulos, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Fetscher, W., Fidecaro, M., Filipcic, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Gerber, H J., Go, A., Haselden, A., Hayman, P J., Henry-Couannier, F., Hollander, R W., Jon-And, K., Kettle, P R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Sakelliou, L., Schafer, M., Schaller, L A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Van Eijk, C W E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., Lorgeril, Jocelyne, Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Published
2001

45. $K^{0} \leftrightharpoons \overline{K}^0$ transitions monitored by strong interactions: a new determination of the $K_{L} - K_{S}$ mass difference

Author

Angelopoulos, Angelos, Aslanides, Elie, Backenstoss, Gerhard, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P J, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derré, J, Ealet, A, Eleftheriadis, C, Fetscher, W, Fidecaro, Maria, Filipcic, A, Francis, D, Fry, J, Gabathuler, Erwin, Gamet, R, Gerber, H J, Go, A, Haselden, A, Haymen, P J, Henry-Coüannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marel, Gérard, Mikuz, M, Miller, J, Montanet, François, Müller, A, Nakada, Tatsuya, Pagels, B, Papadopoulos, I M, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Sakelliou, L, Schäfer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, Ludwig, Thibault, C, Touchard, F, Touramanis, C, van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D

Subjects
High Energy Physics::Experiment, Nuclear Experiment, Particle Physics - Experiment
Abstract

The CPLEAR set-up (modified) has been used to determine the K/sub L/- K/sub S/ mass difference by a method where neutral-kaon strangeness oscillations are monitored through kaon strong interactions, rather than semileptonic decays, thus requiring no assumptions on CPT invariance for the decay amplitudes. The result, Delta m= (0.5343+or-0.0063/sub stat/+or-0.0025/sub syst/)*10/sup 10/ h(cross) /s, provides a valuable input for CPT tests. (22 refs).

Published
2001

46. CP, T and CPT at CPLEAR

Author

Filipcic, Andrej, Angelopoulos, A, Apostolakis, A, Aslanides, E, Backenstoss, G, Bargassa, P, Behnke, O, Benelli, A, Bertin, V, Blanc, F, Bloch, P, Carlson, P, Carroll, M, Cawley, E, Chertok, M B, Danielsson, M, Dejardin, M, Derre, J, Ealet, A, Eleftheriadis, C, Fetscher, W, Fidecaro, M, Filipcic, A, Francis, D, Fry, J, Gabathuler, E, Gamet, R, Gerber, H J, Go, A, Haselden, A, Hayman, P J, Henry-Couannier, F, Hollander, R W, Jon-And, K, Kettle, P R, Kokkas, P, Kreuger, R, Le Gac, R, Leimgruber, F, Mandic, I, Manthos, N, Marsel, G, Mikuz, M, Miller, J, Montanet, F, Muller, A, Nakada, T, Pagels, B, Papadopoulos, I, Pavlopoulos, P, Polivka, G, Rickenbach, R, Roberts, B L, Ruf, T, Schafer, M, Schaller, L A, Schietinger, T, Schopper, A, Tauscher, L, Thibault, C, Touchard, F, Touramanis, C, Van Eijk, C W E, Vlachos, S, Weber, P, Wigger, O, Wolter, M, Zavrtanik, D, and Zimmerman, D

Subjects
High Energy Physics::Phenomenology, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

Using strangeness tagging at production time, CPLEAR measures time-dependent decay rate asymmetries between $K^0$ and $\bar{K}^0$, for picnic and semileptonic decays. Parameters describing CP, T, and CPT violation can be obtained with high precision. In the semileptonic channels neutral kaons are strangeness tagged also at the decay time, by the lepton charge, thus allowing the difference between the transition rates of $\bar{K}^0 \to K^0$ and $K^0 \to \bar{K}^0$ to be measured. In this way CPLEAR obtains the first direct measurement of T violation. By fitting the semileptonic rates under the constraint of the unitarity relation, we prove that in the reported measurement T violation is not mocked by CPT-violation effects in the decay amplitudes. Other CPLEAR measurements, only in part reported here, contribute to the experimental accuracy of the unitarity relation.

Published
2001

47. T-violation and CPT-invariance measurements in the CPLEAR experiment: a detailed description of the analysis of neutral-kaon decays to e pi nu

Author

Angelopoulos, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Fetscher, W., Fidecaro, M., Filipcic, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Gerber, H. J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Jon-And, K., Kettle, P. R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, M., Schaller, L. A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Van Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Subjects
s mass difference, semileptonic decays, tests, particle physics, system, parameter eta(+-)
Abstract

A detailed description of the analysis of neutral kaons decaying to e pi nu is given, based on the complete set of data collected with the CPLEAR experiment, Using a novel approach involving initially strangeness-tagged K-0 and (K) over bar (0), time-dependent decay-rate asymmetries were measured, These asymmetries enabled T- and CPT-violation parameters to be measured in the context of a systematic study. The highlights of this study arc the first direct observation of T violation and the direct determination of the CPT parameter Re(delta) with an accuracy improved by two orders of magnitude with respect to the current value. European Physical Journal C

Published
2001

48. K-0 reversible arrow (K)over-bar(0) transitions monitored by strong interactions: a new determination of the K-L-K-S mass difference

Author

Angelopoulos, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Fetscher, W., Fidecaro, M., Filipcic, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Gerber, H. J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Jon-And, K., Kettle, P. R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Sakeliou, L., Schafer, M., Schaller, L. A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Van Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Abstract

The CPLEAR set-up (modified) has been used to determine the K-L-K-S mass difference by a method where neutral-kaon strangeness oscillations are monitored through kaon strong interactions, rather than semileptonic decays, thus requiring no assumptions on CPT invariance for the decay amplitudes. The result, Deltam = (0.5343 +/- 0.0063(stat) +/- 0.0025(syst)) x 10(10)h/s, provides a valuable input for CPT tests. (C) 2001 Published by Elsevier Science B.V. Physics Letters B

Published
2001

49. Measurement of the energy dependence of the form factor f(+) in K-e3(0) decay

Author

Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M. B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Fetscher, W., Fidecaro, M., Filipcic, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Gerber, H. J., Go, A., Haselden, A., Hayman, P. J., Henry-Couannier, F., Hollander, R. W., Jon-And, K., Kettle, P. R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Muller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B. L., Ruf, T., Schafer, M., Schaller, L. A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., Van Eijk, C. W. E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Zavrtanik, D., Zimmerman, D., and CPLEAR Collaboration

Abstract

Neutral-kaon decays to pi e nu were analysed to determine the q(2) dependence of the K-e3(0), electroweak form factor f(+). Based on 365612 events, this form factor was found to have a linear dependence on q(2) with a slope lambda(+) = 0.0245 +/- 0.0012(stat) +/- 0.0022(syst). (C) 2000 Published by Elsevier Science B.V. All rights reserved. Physics Letters B

Published
2000

50. A detailed description of the analysis of the decay of neutral kaons to $\pi^+ \pi^-$ in the CPLEAR experiment

Author

Apostolakis, A., Aslanides, E., Backenstoss, G., Bargassa, P., Behnke, O., Benelli, A., Bertin, V., Blanc, F., Bloch, P., Carlson, P., Carroll, M., Cawley, E., Chertok, M B., Danielsson, M., Dejardin, M., Derre, J., Ealet, A., Eleftheriadis, C., Fetscher, W., Fidecaro, M., Filipcic, A., Francis, D., Fry, J., Gabathuler, E., Gamet, R., Gerber, H J., Go, A., Haselden, A., Hayman, P J., Henry-Couannier, F., Hollander, R W., Jon-And, K., Kettle, P R., Kokkas, P., Kreuger, R., Le Gac, R., Leimgruber, F., Mandic, I., Manthos, N., Marel, G., Mikuz, M., Miller, J., Montanet, F., Müller, A., Nakada, T., Pagels, B., Papadopoulos, I., Pavlopoulos, P., Polivka, G., Rickenbach, R., Roberts, B L., Ruf, T., Sakelliou, L., Schafer, M., Schaller, L A., Schietinger, T., Schopper, A., Tauscher, L., Thibault, C., Touchard, F., Touramanis, C., van Eijk, C W E., Vlachos, S., Weber, P., Wigger, O., Wolter, M., Yeche, C., Zavrtanik, D., Zimmerman, D., Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), CPLEAR, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
Physics, Particle physics, Physics and Astronomy (miscellaneous), 010308 nuclear & particles physics, media_common.quotation_subject, 01 natural sciences, Asymmetry, Amplitude, 0103 physical sciences, Pi, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], CP violation, High Energy Physics::Experiment, 010306 general physics, Engineering (miscellaneous), Particle Physics - Experiment, media_common
Abstract

A detailed description is given of the analysis of neutral kaons decaying to \({\mathrm{\pi^+\pi^-}}\), based on the complete set of data collected with the CPLEAR experiment. Using a novel approach involving initially strangeness-tagged \({\mathrm{K^0}}\) and \({\mathrm{\overline{K}^0}}\), the time-dependent decay-rate asymmetry has been measured. This asymmetry, resulting from the interference between the \({\mathrm{K_S}}\) and \({\mathrm{K_L}}\) decay amplitudes, has enabled both the magnitude and phase of the CP-violation parameter, \(\eta_{+-}\), to be measured, with a precision comparable to that of the current world-average values.

Published
2000

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