13 results on '"Chiera, N. M."'
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2. New detection systems for an enhanced sensitivity in key stellar (n,$\gamma$) measurements
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Lerendegui-Marco, J., Babiano-Suárez, V., Balibrea-Correa, J., Domingo-Pardo, C., Ladarescu, I., Tarifeño-Saldivia, A., Alcayne, V., Cano-Ott, D., González-Romero, E., Martínez, T., Mendoza, E., Guerrero, C., Calviño, F., Casanovas, A., Köster, U., Chiera, N. M., Dressler, R., Maugeri, E. A., Schumann, D., and Collaboration, the n_TOF
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Nuclear Experiment ,Astrophysics - Instrumentation and Methods for Astrophysics - Abstract
Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key $s$-process nuclei are often challenging. Difficulties arise from the limited mass ($\sim$mg) available and the high sample-related background in the case of the unstable $s$-process branching points. Measurements on neutron magic nuclei, that act as $s$-process bottlenecks, are affected by low (n,$\gamma$) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n\_TOF-EAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,$\gamma$) measurements at n\_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the $s$-process branching-point reaction $^{79}$Se(n,$\gamma$)., Comment: 7 pages, 4 figures (8 panels). Accepted for publication in EPJ-WOC (proceedings of the NPA-X conference). arXiv admin note: text overlap with arXiv:2301.11199
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- 2023
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3. Advances and new ideas for neutron-capture astrophysics experiments at CERN n_TOF
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Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Tarifeño-Saldivia, A., Aberle, O., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Chiera, N. M., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., Furman, V., García-Infantes, F., Gawlik-Ramiega, A., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino0, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Käppeler, F., Kaur, G., Kimura, A., Knapová, I., Koester, U., Kokkoris, M., Kopatch, Y., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mönch, I., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., de Rada, A. Pérez, Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sánchez, A., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., Turko, J., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, T., Woods, P. J., Wright, T., Zarrella, R., and Žugec, P.
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Nuclear Experiment - Abstract
This article presents a few selected developments and future ideas related to the measurement of $(n,\gamma)$ data of astrophysical interest at CERN n_TOF. The MC-aided analysis methodology for the use of low-efficiency radiation detectors in time-of-flight neutron-capture measurements is discussed, with particular emphasis on the systematic accuracy. Several recent instrumental advances are also presented, such as the development of total-energy detectors with $\gamma$-ray imaging capability for background suppression, and the development of an array of small-volume organic scintillators aimed at exploiting the high instantaneous neutron-flux of EAR2. Finally, astrophysics prospects related to the intermediate $i$ neutron-capture process of nucleosynthesis are discussed in the context of the new NEAR activation area., Comment: preprint submitted to the European Physical Journal A, 11 pages, 4 figures
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- 2022
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4. Advances and new ideas for neutron-capture astrophysics experiments at CERN n_TOF
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Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Tarifeño-Saldivia, A., Aberle, O., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Chiera, N. M., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., A. Cortés-Giraldo, M., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., García-Infantes, F., Gawlik-Ramięga , A., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Käppeler, F., Kaur, G., Kimura, A., Knapová, I., Köster, U., Kokkoris, M., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mönch, I., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., Pérez de Rada, A., Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sánchez, A., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., Turko, J., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, T., Woods, P. J., Wright, T., Zarrella, R., and Žugec, P.
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- 2023
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5. First measurement of the 94Nb(n,γ) cross section at the CERN n_TOF facility
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Balibrea-Correa J., Babiano-Suárez V., Lerendegui-Marco J., Domingo-Pardo C., Ladarescu I., Tarifeño-Saldivia A., Alcayne V., Cano-Ott D., González-Romero E., Martínez T., Mendoza E., Guerrero C., Calviño F., Casanovas A., Köster U., Chiera N. M., Dressler R., Maugeri E. A., Schumann D., Aberle O., Altieri S., Amaducci S., Andrzejewski J., Bacak M., Beltrami C., Bennett S., Bernardes A. P., Berthoumieux E., Beyer R., Boromiza M., Bosnar D., Caamaño M., Calviani M., Cerutti F., Cescutti G., Chiaveri E., Colombetti P., Colonna N., Console Camprini P., Cortés G., Cortés-Giraldo M. A., Cosentino L., Cristallo S., Dellmann S., Di Castro M., Di Maria S., Diakaki M., Dietz M., Dupont E., Durán I., Eleme Z., Fargier S., Fernández B., Fernández-Domínguez B., Finocchiaro P., Fiore S., García-Infantes F., Gawlik-Ramięga A., Gervino G., Gilardoni S., Gunsing F., Gustavino C., Heyse J., Hillman W., Jenkins D. G., Jericha E., Junghans A., Kadi Y., Kaperoni K., Kaur G., Kimura A., Knapová I., Kokkoris M., Krtička M., Kyritsis N., Lederer-Woods C., Lerner G., Manna A., Masi A., Massimi C., Mastinu P., Mastromarco M., Mazzone A., Mengoni A., Michalopoulou V., Milazzo P. M., Mucciola R., Murtas F., Musacchio-Gonzalez E., Musumarra A., Negret A., Pérez de Rada A., Pérez-Maroto P., Patronis N., Pavón-Rodríguez J. A., Pellegriti M. G., Perkowski J., Petrone C., Pirovano E., Plaza J., Pomp S., Porras I., Praena J., Quesada J. M., Reifarth R., Rochman D., Romanets Y., Rubbia C., Sánchez-Caballero A., Sabaté-Gilarte M., Schillebeeckx P., Sekhar A., Smith A. G., Sosnin N. V., Stamati M. E., Sturniolo A., Tagliente G., Tarrío D., Torres-Sánchez P., Vagena E., Valenta S., Variale V., Vaz P., Vecchio G., Vescovi D., Vlachoudis V., Vlastou R., Wallner A., Woods P. J., Wright T., Zarrella R., and Žugec P.
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Physics ,QC1-999 - Abstract
One of the crucial ingredients for the improvement of stellar models is the accurate knowledge of neutron capture cross-sections for the different isotopes involved in the s-,r- and i- processes. These measurements can shed light on existing discrepancies between observed and predicted isotopic abundances and help to constrain the physical conditions where these reactions take place along different stages of stellar evolution. In the particular case of the radioactive 94Nb, the 94Nb(n,γ) cross-section could play a role in the determination of the s-process production of 94Mo in AGB stars, which presently cannot be reproduced by state-of-the-art stellar models. There are no previous 94Nb(n,γ) experimental data for the resolved and unresolved resonance regions mainly due to the difficulties in producing highquality samples and also due to limitations in conventional detection systems commonly used in time-of-flight experiments. Motivated by this situation, a first measurement of the 94Nb(n,γ) reaction was carried out at CERN n_TOF, thereby exploiting the high luminosity of the EAR2 area in combination with a new detection system of small-volume C6D6-detectors and a high quality 94Nb-sample. The latter was based on hyper-pure 93Nb material activated at the high-flux reactor of ILL-Grenoble. An innovative ring-configuration detection system in close geometry around the capture sample allowed us to significantly enhance the signal-to-background ratio. This set-up was supplemented with two conventional C6D6-detectors and a highresolution LaCl3(Ce)-detector, which will be employed for addressing reliably systematic effects and uncertainties. At the current status of the data analysis, 18 resonance in 94Nb+n have been observed for the first time in the neutron energy range from thermal up to 10 keV.
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- 2023
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6. Gas-sensing performance of SnO2-based chemoresistive sensors after irradiation with alpha particles and gamma-rays.
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Zonta, G., Astolfi, M., Cerboni, N., Gherardi, S., Kasprzak, M., Malagù, C., Steinegger, P., Vincenzi, D., and Chiera, N. M.
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CHEMORECEPTORS ,ALPHA rays ,GAS detectors ,DETECTORS ,IRRADIATION ,GOLD nanoparticles ,SCANNING electron microscopy - Abstract
SnO
2 -based chemoresistive sensors were tested for the detection of H2 O and CO impurities both before and after exposure to α-particles and γ-rays, assessing their radiation resistance for use in moderately radioactive environments. The materials examined were SnO2 with gold nanoparticles, and a mix of Sn-, Ti-, and Nb-oxides. The performance was evaluated in both an open-ended gas-flow setup and in a gas-loop system. Post-irradiation characterization via scanning electron microscopy and energy-dispersive X-ray spectroscopy was performed to assess morphological changes. Preliminary results showed a fast and efficient response of the sensors after irradiation, indicating their suitability for this novel use. [ABSTRACT FROM AUTHOR]- Published
- 2024
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7. New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements
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Lerendegui-Marco, J., primary, Babiano-Suárez, V., additional, Balibrea-Correa, J., additional, Domingo-Pardo, C., additional, Ladarescu, I., additional, Tarifeño-Saldivia, A., additional, Alcayne, V., additional, Cano-Ott, D., additional, González-Romero, E., additional, Martínez, T., additional, Mendoza, E., additional, Guerrero, C., additional, Calviño, F., additional, Casanovas, A., additional, Köster, U., additional, Chiera, N. M., additional, Dressler, R., additional, Maugeri, E. A., additional, Schumann, D., additional, Aberle, O., additional, Altieri, S., additional, Amaducci, S., additional, Andrzejewski, J., additional, Bacak, M., additional, Beltrami, C., additional, Bennett, S., additional, Bernardes, A. P., additional, Berthoumieux, E., additional, Beyer, R., additional, Boromiza, M., additional, Bosnar, D., additional, Caamaño, M., additional, Calviani, M., additional, Cerutti, F., additional, Cescutti, G., additional, Chiaveri, E., additional, Colombetti, P., additional, Colonna, N., additional, Console Camprini, P., additional, Cortés, G., additional, Cortés-Giraldo, M. A., additional, Cosentino, L., additional, Cristallo, S., additional, Dellmann, S., additional, Di Castro, M., additional, Di Maria, S., additional, Diakaki, M., additional, Dietz, M., additional, Dupont, E., additional, Durán, I., additional, Eleme, Z., additional, Fargier, S., additional, Fernández, B., additional, Fernández-Domínguez, B., additional, Finocchiaro, P., additional, Fiore, S., additional, García-Infantes, F., additional, Gawlik-Ramięga, A., additional, Gervino, G., additional, Gilardoni, S., additional, Gunsing, F., additional, Gustavino, C., additional, Heyse, J., additional, Hillman, W., additional, Jenkins, D. G., additional, Jericha, E., additional, Junghans, A., additional, Kadi, Y., additional, Kaperoni, K., additional, Kaur, G., additional, Kimura, A., additional, Knapová, I., additional, Kokkoris, M., additional, Krtička, M., additional, Kyritsis, N., additional, Lederer-Woods, C., additional, Lerner, G., additional, Manna, A., additional, Masi, A., additional, Massimi, C., additional, Mastinu, P., additional, Mastromarco, M., additional, Mazzone, A., additional, Mengoni, A., additional, Michalopoulou, V., additional, Milazzo, P. M., additional, Mucciola, R., additional, Murtas, F., additional, Musacchio-Gonzalez, E., additional, Musumarra, A., additional, Negret, A., additional, Pérez de Rada, A., additional, Pérez-Maroto, P., additional, Patronis, N., additional, Pavón-Rodríguez, J. A., additional, Pellegriti, M. G., additional, Perkowski, J., additional, Petrone, C., additional, Pirovano, E., additional, Plaza, J., additional, Pomp, S., additional, Porras, I., additional, Praena, J., additional, Quesada, J. M., additional, Reifarth, R., additional, Rochman, D., additional, Romanets, Y., additional, Rubbia, C., additional, Sánchez-Caballero, A., additional, Sabaté-Gilarte, M., additional, Schillebeeckx, P., additional, Sekhar, A., additional, Smith, A. G., additional, Sosnin, N. V., additional, Stamati, M. E., additional, Sturniolo, A., additional, Tagliente, G., additional, Tarrío, D., additional, Torres-Sánchez, P., additional, Vagena, E., additional, Valenta, S., additional, Variale, V., additional, Vaz, P., additional, Vecchio, G., additional, Vescovi, D., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Woods, P. J., additional, Wright, T., additional, Zarrella, R., additional, and Žugec, P., additional
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- 2023
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8. Interaction of elemental mercury with selenium surfaces: model experiments for investigations of superheavy elements copernicium and flerovium
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Chiera, N. M., Aksenov, N. V., Albin, Y. V., Bozhikov, G. A., Chepigin, V. I., Dmitriev, S. N., Dressler, R., Eichler, R., Lebedev, V. Ya., Madumarov, A., Malyshev, O. N., Piguet, D., Popov, Y. A., Sabelnikov, A. V., Steinegger, P., Svirikhin, A. I., Türler, A., Vostokin, G. K., Vögele, A., and Yeremin, A. V.
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- 2017
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9. First measurement of the 94Nb(n,γ) cross section at the CERN n_TOF facility.
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Balibrea-Correa, J., Babiano-Suárez, V., Lerendegui-Marco, J., Domingo-Pardo, C., Ladarescu, I., Tarifeño-Saldivia, A., Alcayne, V., Cano-Ott, D., González-Romero, E., Martínez, T., Mendoza, E., Guerrero, C., Calviño, F., Casanovas, A., Köster, U., Chiera, N. M., Dressler, R., Maugeri, E. A., Schumann, D., and Aberle, O.
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NEUTRON capture ,ISOTOPES ,NUCLEAR astrophysics ,NUCLEOSYNTHESIS ,NUCLEAR reactions - Abstract
One of the crucial ingredients for the improvement of stellar models is the accurate knowledge of neutron capture cross-sections for the different isotopes involved in the s-,r- and i- processes. These measurements can shed light on existing discrepancies between observed and predicted isotopic abundances and help to constrain the physical conditions where these reactions take place along different stages of stellar evolution. In the particular case of the radioactive
94 Nb, the94 Nb(n,γ) cross-section could play a role in the determination of the s-process production of94 Mo in AGB stars, which presently cannot be reproduced by state-of-the-art stellar models. There are no previous94 Nb(n,γ) experimental data for the resolved and unresolved resonance regions mainly due to the difficulties in producing highquality samples and also due to limitations in conventional detection systems commonly used in time-of-flight experiments. Motivated by this situation, a first measurement of the94 Nb(n,γ) reaction was carried out at CERN n_TOF, thereby exploiting the high luminosity of the EAR2 area in combination with a new detection system of small-volume C6D6-detectors and a high quality94 Nb-sample. The latter was based on hyper-pure 93Nb material activated at the high-flux reactor of ILL-Grenoble. An innovative ring-configuration detection system in close geometry around the capture sample allowed us to significantly enhance the signal-to-background ratio. This set-up was supplemented with two conventional C6 D6 -detectors and a highresolution LaCl3 (Ce)-detector, which will be employed for addressing reliably systematic effects and uncertainties. At the current status of the data analysis, 18 resonance in94 Nb+n have been observed for the first time in the neutron energy range from thermal up to 10 keV. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
10. Interaction of elemental mercury with selenium surfaces: model experiments for investigations of superheavy elements copernicium and flerovium
- Author
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Chiera, N. M., primary, Aksenov, N. V., additional, Albin, Y. V., additional, Bozhikov, G. A., additional, Chepigin, V. I., additional, Dmitriev, S. N., additional, Dressler, R., additional, Eichler, R., additional, Lebedev, V. Ya., additional, Madumarov, A., additional, Malyshev, O. N., additional, Piguet, D., additional, Popov, Y. A., additional, Sabelnikov, A. V., additional, Steinegger, P., additional, Svirikhin, A. I., additional, Türler, A., additional, Vostokin, G. K., additional, Vögele, A., additional, and Yeremin, A. V., additional
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- 2016
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11. Complex chemistry with complex compounds.
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Eichler, Robert, Asai, M., Brand, H., Chiera, N. M., Di Nitto, A., Dressler, R., Düllmann, Ch. E., Even, J., Fangli, F., Goetz, M., Haba, H., Hartmann, W., Jäger, E., Kaji, D., Kanaya, J., Kaneya, Y., Khuyagbaatar, J., Kindler, B., Komori, Y., and Kraus, B.
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CHEMISTRY ,PHYSICAL sciences ,COMPLEX compounds ,CLATHRATE compounds ,COMPLEXOMETRIC titration - Abstract
In recent years gas-phase chemical studies assisted by physical pre-separation allowed for the investigation of fragile single molecular species by gas-phase chromatography. The latest success with the heaviest group 6 transactinide seaborgium is highlighted. The formation of a very volatile hexacarbonyl compound Sg(CO)
6 was observed similarly to its lighter homologues molybdenum and tungsten. The interactions of these gaseous carbonyl complex compounds with quartz surfaces were investigated by thermochromatography. Second-generation experiments are under way to investigate the intramolecular bond between the central metal atom of the complexes and the ligands addressing the influence of relativistic effects in the heaviest compounds. Our contribution comprises some aspects of the ongoing challenging experiments as well as an outlook towards other interesting compounds related to volatile complex compounds in the gas phase. [ABSTRACT FROM AUTHOR]- Published
- 2016
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12. Advances and new ideas for neutron-capture astrophysics experiments at CERN n_TOF
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Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Tarifeño-Saldivia, A., Aberle, O., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Chiera, N. M., Colombetti, P., Colonna, N., Camprini, P. Console, Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di Castro, M., Di Maria, S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., Furman, V., García-Infantes, F., Gawlik-Ramiega, A., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino0, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., Junghans, A., Kadi, Y., Kaperoni, K., Käppeler, F., Kaur, G., Kimura, A., Knapová, I., Koester, U., Kokkoris, M., Kopatch, Y., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mönch, I., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., de Rada, A. Pérez, Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sánchez, A., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., Turko, J., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., Wallner, T., Woods, P. J., Wright, T., Zarrella, R., Žugec, P., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Laue-Langevin (ILL), n_TOF, HEP, INSPIRE, Universitat Politècnica de Catalunya. Departament de Física, and Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
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Astrofísica ,Nuclear and High Energy Physics ,Física [Àrees temàtiques de la UPC] ,[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] ,Physics ,FOS: Physical sciences ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Astrophysics ,Subatomär fysik ,Astronomi, astrofysik och kosmologi ,Subatomic Physics ,Astronomy, Astrophysics and Cosmology ,Nuclear Physics - Experiment ,ddc:530 ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
This article presents a fewselected developments and future ideas related to the measurement of (n, γ ) data of astrophysical interest at CERN n_TOF. The MC-aided analysis methodology for the use of low-efficiency radiation detectors in time-of-flight neutron-capture measurements is discussed, with particular emphasis on the systematic accuracy. Several recent instrumental advances are also presented, such as the development of total-energy detectors with γ - ray imaging capability for background suppression, and the development of an array of small-volume organic scintillators aimed at exploiting the high instantaneous neutron-flux of EAR2. Finally, astrophysics prospects related to the intermediate i neutron-capture process of nucleosynthesis are discussed in the context of the new NEAR activation area., European Research Council (ERC) 681740, Ministry of Science and Innovation, Spain (MICINN), Instituto de Salud Carlos III, Spanish Government PID2019-104714GBC21 FPA2017-83946-C2-1-P FIS2015-71688-ERC FPA-2016-77689-C2-1-R RTI2018-098117-B-C21, CSIC PIE-201750I26, European H2020 847552
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13. Complex chemistry with complex compounds
- Author
-
Sunao Miyashita, T. Tomitsuka, Yongfeng Wang, H. Brand, Daiya Kaji, M. Murakami, N.M. Chiera, Patrick Steinegger, S. Yano, Kazuaki Tsukada, K. Tanaka, Egon Jäger, Ch. E. Düllmann, Y. Kaneya, Alexander Yakushev, Birgit Kindler, Takayuki Sumita, Atsushi Toyoshima, Z. Qin, Yuichiro Nagame, Norbert Wiehl, Y. Kudou, Mirei Takeyama, Y. Wittwer, Robert Eichler, K. Morimoto, S. Yamaki, Rugard Dressler, N. Sato, Jens Volker Kratz, F. Fangli, H. Haba, J. Krier, B. Kraus, A. Di Nitto, Tatsuhiko Sato, Julia Even, J. Kanaya, N. Kurz, D. Piguet, W. Hartmann, Yukiko Komori, Yasuo Wakabayashi, M. Goetz, J. Steiner, K. Morita, J. Khuyagbaatar, I. Usoltsev, M. Asai, Kazuhiro Ooe, Andreas Türler, Eichler, R., Asai, M., Brand, H., Chiera, N. M., Di Nitto, A., Dressler, R., Dullmann, Ch. E., Even, J., Fangli, F., Goetz, M., Haba, H., Hartmann, W., Jager, E., Kaji, D., Kanaya, J., Kaneya, Y., Khuyagbaatar, J., Kindler, B., Komori, Y., Kraus, B., Kratz, J. V., Krier, J., Kudou, Y., Kurz, N., Miyashita, S., Morimoto, K., Morita, K., Murakami, M., Nagame, Y., Ooe, K., Piguet, D., Sato, N., Sato, T. K., Steiner, J., Steinegger, P., Sumita, T., Takeyama, M., Tanaka, K., Tomitsuka, T., Toyoshima, A., Tsukada, K., Turler, A., Usoltsev, I., Wakabayashi, Y., Wang, Y., Wiehl, N., Wittwer, Y., Yakushev, A., Yamaki, S., Yano, S., and Qin, Z.
- Subjects
Physics ,QC1-999 ,Transactinide element ,chemistry.chemical_element ,Tungsten ,010402 general chemistry ,010403 inorganic & nuclear chemistry ,01 natural sciences ,0104 chemical sciences ,Metal ,chemistry ,Group (periodic table) ,Computational chemistry ,Molybdenum ,Chemical physics ,visual_art ,Intramolecular force ,Seaborgium ,540 Chemistry ,Atom ,visual_art.visual_art_medium ,570 Life sciences ,biology - Abstract
In recent years gas-phase chemical studies assisted by physical pre-separation allowed for the investigation of fragile single molecular species by gas-phase chromatography. The latest success with the heaviest group 6 transactinide seaborgium is highlighted. The formation of a very volatile hexacarbonyl compound Sg(CO)6 was observed similarly to its lighter homologues molybdenum and tungsten. The interactions of these gaseous carbonyl complex compounds with quartz surfaces were investigated by thermochromatography. Second-generation experiments are under way to investigate the intramolecular bond between the central metal atom of the complexes and the ligands addressing the influence of relativistic effects in the heaviest compounds. Our contribution comprises some aspects of the ongoing challenging experiments as well as an outlook towards other interesting compounds related to volatile complex compounds in the gas phase.
- Published
- 2016
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