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1. Coulomb dissociation of $^{20,21}$N

Author

Röder, Marko, Adachi, Tatsuya, Aksyutina, Yulia, Alcantara, Juan, Altstadt, Sebastian, Alvarez-Pol, Hector, Ashwood, Nicholas, Atar, Leyla, Aumann, Thomas, Avdeichikov, Vladimir, Barr, M., Beceiro, Saul, Bemmerer, Daniel, Benlliure, Jose, Bertulani, Carlos, Boretzky, Konstanze, Borge, Maria J. G., Burgunder, G., Caamano, Manuel, Caesar, Christoph, Casarejos, Enrique, Catford, Wilton, Cederkall, Joakim, Chakraborty, S., Chartier, Marielle, Chulkov, Leonid, Cortina-Gil, Dolores, Crespo, Raquel, Pramanik, Ushasi Datta, Diaz-Fernandez, Paloma, Dillmann, Iris, Elekes, Zoltan, Enders, Joachim, Ershova, Olga, Estrade, A., Farinon, F., Fraile, Luis M., Freer, Martin, Freudenberger, M., Fynbo, Hans, Galaviz, Daniel, Geissel, Hans, Gernhäuser, Roman, Göbel, Kathrin, Golubev, Pavel, Diaz, Diego Gonzalez, Hagdahl, Julius, Heftrich, Tanja, Heil, Michael, Heine, Marcel, Heinz, Andreas, Henriques, Ana, Holl, Matthias, Ickert, G., Ignatov, Alexander, Jakobsson, Bo, Johansson, Hakan, Jonson, Björn, Kalantar-Nayestanaki, Nasser, Kanungo, Rituparna, Kelic-Heil, Aleksandra, Knöbel, Ronja, Kröll, Thorsten, Krücken, Reiner, Kurcewicz, J., Kurz, Nikolaus, Labiche, Marc, Langer, Christoph, Bleis, Tudi Le, Lemmon, Roy, Lepyoshkina, Olga, Lindberg, Simon, Machado, Jorge, Marganiec, Justyna, Caro, Magdalena Mostazo, Movsesyan, Alina, Najafi, Mohammad Ali, Nilsson, Thomas, Nociforo, Chiara, Panin, Valerii, Paschalis, Stefanos, Perea, Angel, Petri, Marina, Pietri, S., Plag, Ralf, Prochazka, A., Rahaman, Md. Anisur, Rastrepina, Ganna, Reifarth, Rene, Ribeiro, Guillermo, Ricciardi, M. Valentina, Rigollet, Catherine, Riisager, Karsten, Rossi, Dominic, Saez, Jose Sanchez del Rio, Savran, Deniz, Scheit, Heiko, Simon, Haik, Sorlin, Olivier, Stoica, V., Streicher, Branislav, Taylor, Jon, Tengblad, Olof, Terashima, Satoru, Thies, Ronja, Togano, Yasuhiro, Uberseder, Ethan, Van de Walle, J., Velho, Paulo, Volkov, Vasily, Wagner, Andreas, Wamers, Felix, Weick, Helmut, Weigand, Mario, Wheldon, Carl, Wilson, G., Wimmer, Christine, Winfield, J. S., Woods, Philip, Yakorev, Dmitry, Zhukov, Mikhail, Zilges, Andreas, and Zuber, Kai

Subjects
Nuclear Experiment
Abstract

Neutron-rich light nuclei and their reactions play an important role for the creation of chemical elements. Here, data from a Coulomb dissociation experiment on $^{20,21}$N are reported. Relativistic $^{20,21}$N ions impinged on a lead target and the Coulomb dissociation cross section was determined in a kinematically complete experiment. Using the detailed balance theorem, the $^{19}\mathrm{N}(\mathrm{n},\gamma)^{20}\mathrm{N}$ and $^{20}\mathrm{N}(\mathrm{n},\gamma)^{21}\mathrm{N}$ excitation functions and thermonuclear reaction rates have been determined. The $^{19}\mathrm{N}(\mathrm{n},\gamma)^{20}\mathrm{N}$ rate is up to a factor of 5 higher at $T<1$\,GK with respect to previous theoretical calculations, leading to a 10\,\% decrease in the predicted fluorine abundance.

Published
2016
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2. Emittance Growth Due to Multiple Coulomb Scattering in a Linear Collider Based on Plasma Wakefield Acceleration

Author

Mete, Oznur, Hanahoe, Kieran, Xia, Guoxing, Labiche, Marc, Karamyshev, Oleg, Wei, Yelong, Welsch, Carsten, and Wing, Matthew

Subjects
Physics - Accelerator Physics
Abstract

Alternative acceleration technologies are currently under development for cost-effective, robust, compact and efficient solutions. One such technology is plasma wakefield acceleration, driven by either a charged particle or laser beam. However, the potential issues must be studied in detail. In this paper, the emittance growth of the witness beam through elastic scattering from gaseous media is derived. The model is compared with the numerical studies., Comment: This work will be presented in IPAC 2014

Published
2014

3. A new Time-of-flight detector for the R$$^3$$B setup

Author

Heil, M., Kelić-Heil, A., Bott, L., Almusidi, T., Alvarez-Pol, H., Atar, L., Atkins, L., Aumann, T., Benlliure, J., Boretzky, K., Brückner, B., Cabanelas, P., Caesar, C., Casarejos, E., Cederkall, J., Chulkov, L., Corsi, A., Dueñas, J., Erbacher, P., Rodriguez, S. Escribano, Falduto, A., Feijoo, M., Frotscher, A., Frühauf, J., Gašparić, I., Borge, M. J. G., Gerbig, J., Gernhäuser, R., Gilbert, M., Glorius, J., Gnoffo, B., Göbel, K., Caamaño, D. Gonzalez, Grein, A., Hartig, A.-L., Heggen, H., Heine, M., Heinz, A., Holl, M., Homm, I., Horvat, A., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kamenyero, A., Khodaparast, A., Kiselev, O., Klenze, P., Knösel, M., Koch, K., Körper, D., Kröll, T., Kurtulgil, D., Kurz, N., Löher, B., Langer, C., Lehr, C., Litvinov, Y., Liu, H., Morales, S. Murillo, Nácher, E., Nilsson, T., Park, J., Paschalis, S., Pellegri, L., Perea, A., Petri, M., Pohl, T., Ponnath, L., Popočovski, R., Reifarth, R., Rhee, H.-B., Sanchez, J. L. Rodriguez, Rossi, D., Sürder, C., Sánchez-Benítez, A. M., Savran, D., Scheit, H., Simon, H., Slavkovská, Z., Storck-Dutine, S., Sun, Y., Törnqvist, H. T., Tanaka, J., Tengblad, O., Thomas, B., Varga, L., Volknandt, M., Wagner, V., Wamers, F., Zanetti, L., Aliotta, Marialuisa, Alkhazov, Georgy, Almusidi, Tahani, Alvarez-Pol, Hector, André, Paul, Assié, Marlène, Atar, Leyla, Atkins, Liam, Audouin, Laurent, Aumann, Thomas, Authelet, Gilles, Ayyad, Yassid, Bajzek, Martin, Barriere, Antoine, Beceiro-Novo, Saul, Belogurov, Sergey, Bemmerer, Daniel, Benlliure, Jose, Bertulani, Carlos, Bezbakh, Andrey, Blanchon, Guillaume, Boos, Carl Georg, Boretzky, Konstanze, Borge, Maria J., Borzov, Ivan, Bott, Lukas, Brückner, Benjamin, Cabanelas Eiras, Pablo, Caesar, Christoph, Calinescu, Stefana, Casarejos, Enrique, Catford, Wilton, Cederkall, Joakim, Chatillon, Audrey, Cherciu, Madalin Ilie, Chishti, M Majid Rauf, Chulkov, Leonid, Cirstian, Andreea, Corsi, Anna, Cortina-Gil, Dolores, Cravo, Edgar, Crespo, Raquel, Danilov, Andrey, de Angelis, Giacomo, De Filippo, Enrico, Diaz-Torres, Alexis, Dickel, Timo, Dobrovolsky, Alexander, Doornenbal, Pieter, Duer, Meytal, Egelhof, Peter, Elekes, Zoltan, Enders, Joachim, Erbacher, Philipp, Escribano Rodriguez, Sonia, Fahlander, Claes, Falduto, Ashton, Feijoo, Martina, Fernandez Ruiz, Daniel, Fomichev, Andrey, Fulop, Zsolt, Galaviz Redondo, Daniel, Galiana, Elisabet, García, Gabriel, García Távora, Vicente, Gasparic, Igor, Ge, Zhuang, Geissel, Hans, Geraci, Elena, Gerl, Jürgen, Gernhäuser, Roman, Gillibert, Alain, Glorius, Jan, Gnoffo, Brunilde, Göbel, Kathrin, Golovkov, Mikhail, Golovtsov, Victor, Golubev, Pavel, González Caamaño, David, Gorshkov, Alexander, Graña González, Antia, Gridnev, Anatoly, Gruzinskii, Nikolai, Guimaraes, Valdir, Harakeh, Muhsin N., Hartig, Anna-Lena, Heftrich, Tanja, Heggen, Henning, Heil, Michael, Heinz, Andreas, Hen, Or, Henrich, Corinna, Henriques, Ana, Hensel, Thomas, Holl, Matthias, Homm, Ilja, Horvat, Andrea, Horváth, Ákos, Hucka, Jan-Paul, Inglessi, Alexander, Jedele, Andrea, Jelavic Malenica, Desa, Jenegger, Tobias, Ji, Liancheng, Johansson, Håkan, Jonson, Björn, Jurado, Beatriz, Kahlbow, Julian, Kalantar-Nayestanaki, Nasser, Kamenyero, Armel, Kazantseva, Erika, Kelic-Heil, Aleksandra, Khanzadeev, Alexey, Kiselev, Oleg, Klenze, Philipp, Knyazev, Alexander, Koch, Karsten, Kogimtzis, Moschos, Kokubun, Kei, Korolev, Guerman, Körper, Daniel, Korsheninnikov, Alexey, Korten, Wolfram, Kozlenko, Nikolai, Krasilovskaja, Sabina, Kresan, Dmytro, Krivshich, Anatoly, Kröll, Thorsten, Krupko, Sergey, Kudaibergenova, Eleonora, Kunne Sohler, Dorottya, Kurtulgil, Deniz, Kurz, Nikolaus, Kuzmin, Evgeny, Kuznetsov, Viacheslav, Labiche, Marc, Lagni, Andrea, Langer, Christoph, Lányi, Zsombor, Lazarus, Ian, Le Fèvre, Arnaud, Leifels, Yvonne, Lepine-Szily, Alinka, Lewitowicz, Marek, Lihtar, Ivana, Linh, Bui, Litvinov, Yuri, Liu, Hongna, Löher, Bastian, Lommel, Bettina, Lorenz, Enis, Lukasik, Jerzy, Macchiavelli, Augusto, Maev, Evgeny, Maillertet, Charles, Maisuzenko, Dmitrii, Maj, Adam, Martorana, Nunzia Simona, Mauss, Benoît, Mayri, Christophe, Milhomens da Fonseca, Leandro, Morfouace, Pierre, Mozumdar, Nikhil, Mücher, Dennis, Murillo Morales, Silvia, Nacher, Enrique, Nikolskii, Evgenii, Nilsson, Thomas, Nociforo, Chiara, Nolden, Fritz, Nyman, Göran, Obertelli, Alexandre, Pagano, Emanuele Vincenzo, Panin, Valerii, Park, Joochun, Paschalis, Stefanos, Pei, Junchen, Perea, Angel, Petri, Marina, Piasetzky, Eli, Pietri, Stephane, Pirrone, Sara, Politi, Giuseppe, Pollacco, Emauel, Ponnath, Lukas, Potlog, Petru-Mihai, Prajapat, Rinku, Pritula, Roman, Qi, Hang, Rappold, Christophe, Reifarth, Rene, Revel, Aldric, Rhee, Han-Bum, Risitano, Fabio, Rodriguez Sanchez, Jose Luis, Rose, Luke, Rossi, Dominic, Rudigier, Matthias, Russotto, Paolo, Sánchez-Benítez, Ángel-Miguel, Sanjari, Shahab, Santamaria, Clementine, Sarantsev, Victor, Savran, Deniz, Scheidenberger, Christoph, Scheit, Heiko, Schmidt, Konrad, Simon, Haik, Simon, Johannes, Slavkovská, Zuzana, Slepnev, Roman, Sorlin, Olivier, Sousa, Tomás, Spiridon, Alexandra, Stan, Emil, Stanoiu, Mihai, Stefanescu, Alexandra, Stefanescu, Ionut, Storck-Dutine, Sonja, Stott, Aaron, Sun, Baohua, Sun, Yelei, Sürder, Christian, Taieb, Julien, Tanaka, Junki, Tanihata, Isao, Taniuchi, Ryo, Tengblad, Olof, Terekhin, Pavel, Teubig, Pamela, Törnqvist, Hans, Trache, Livius, Trautmann, Wolfgang, Trimarchi, Marina, Typel, Stefan, Uesaka, Tomohiro, Unsworth, Carl, Uvarov, Lev, Vandebrouck, Marine, Varga, Laszlo, Velardita, Simone, Velho, Paulo, Vencelj, Matjaz, Volknandt, Meiko, Volkov, Sergei, von Tresckow, Martin, Wagner, Andreas, Wamers, Felix, Wang, Yanzhao, Whitehead, Matthew, Wienholtz, Frank, Wimmer, Kathrin, Winkler, Martin, Xarepe, Manuel, Ye, Yanlin, Zacarias, Sabrina, Zamora Cardona, Juan Carlos, Zhang, Wei, Zhdanov, Andrei, Zhukov, Mikhail, Zilges, Andreas, Zuber, Kai, Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-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), 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), R3B, Federal Ministry of Education and Research (Germany), Helmholtz International Center for FAIR, Ministerio de Ciencia e Innovación (España), Xunta de Galicia, Agencia Estatal de Investigación (España), Swedish Research Council, Science and Technology Facilities Council (UK), Royal Society (UK), Projekt DEAL, Energy and Sustainability Research Institute Groni, and Nuclear Energy

Subjects
Nuclear and High Energy Physics, ddc:530, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
Abstract

19 pags., 16 figs., 8 tabs., We present the design, prototype developments and test results of the new time-of-flight detector (ToFD) which is part of the R3B experimental setup at GSI and FAIR, Darmstadt, Germany. The ToFD detector is able to detect heavy-ion residues of all charges at relativistic energies with a relative energy precision σΔE/ ΔE of up to 1% and a time precision of up to 14 ps (sigma). Together with an elaborate particle-tracking system, the full identification of relativistic ions from hydrogen up to uranium in mass and nuclear charge is possible., This work received support from BMBF (05P19RFFN1, 05P15RDFN1, 05P19RDFN1) and HIC for FAIR. J.P. has been supported by the Institute for Basic Science (IBS-R031-D1). E.C. has been supported by the Ministry of Science and Innovation in Spain (PGC2018-099746-B-C22). J.L.R.S. thanks the support from the Regional Government of Galicia under the program of postdoctoral fellowships ED481B-2017-002 and ED481D-2021-018. O.T. has been supported by AEI/FEDER, UE project No. PID2019-104390GB-I00. G.B., A.H., H.T.J., B.J. and T.N. have been supported by the Swedish Research Council under contract 2017-03839. This work was supported by the Royal Society and UK STFC awards ST/L005727/1, ST/P003885/1.

Published
2022

4. Lifetime measurements of excited states in ¹⁶³W and the implications for the anomalous B(E2) ratios in transitional nuclei

Author

Lewis, M. C., Joss, D. T., Sayğı, Bahadır, Page, Robert D., Cullen, David M., Barber, L., Giles, Michael, Simpson, John J., Al-Aqeel, M. A. M., Badran, H., Braunroth, Thomas, Briscoe, Andy D., Calverley, T., Dewald, Alfred, Doncel, M., Grahn, Tuomas, Greenlees, Paul, Henrich, Corinna, Herzáň, Andrej, Herzberg, Rolf Dietmar, Higgins, Edward J., Hilton, J., Ilieva, Stoyanka, Julin, Rauno, Juutinen, Sakari, Keatings, James Michael, Kröll, Thorsten, Labiche, Marc A., Mashtakov, Konstantin R., Nara Singh, Bondili S., Parr, Edward J., Partanen, J., Paul, Edward S., Rahkila, Panu M., Sandzelius, M., Sarén, Jan J., Scholey, Cath S., Siciliano, Marco, Spagnoletti, Pietro, Stolze, S. M., Szwec, Stuart V., Taylor, Michael J., Uusitalo, Juha, Lewis, M. C., Joss, D. T., Sayğı, Bahadır, Page, Robert D., Cullen, David M., Barber, L., Giles, Michael, Simpson, John J., Al-Aqeel, M. A. M., Badran, H., Braunroth, Thomas, Briscoe, Andy D., Calverley, T., Dewald, Alfred, Doncel, M., Grahn, Tuomas, Greenlees, Paul, Henrich, Corinna, Herzáň, Andrej, Herzberg, Rolf Dietmar, Higgins, Edward J., Hilton, J., Ilieva, Stoyanka, Julin, Rauno, Juutinen, Sakari, Keatings, James Michael, Kröll, Thorsten, Labiche, Marc A., Mashtakov, Konstantin R., Nara Singh, Bondili S., Parr, Edward J., Partanen, J., Paul, Edward S., Rahkila, Panu M., Sandzelius, M., Sarén, Jan J., Scholey, Cath S., Siciliano, Marco, Spagnoletti, Pietro, Stolze, S. M., Szwec, Stuart V., Taylor, Michael J., and Uusitalo, Juha

Abstract

This letter reports lifetime measurements of excited states in the odd-N nucleus 163W using the recoil-distance Doppler shift method to probe the core polarising effect of the i13/2 neutron orbital on the underlying soft triaxial even-even core. The ratio B(E2:21/2⁺ → 17/2⁺)/B(E2:17/2⁺ → 13/2⁺) is consistent with the predictions of the collective rotational model. The deduced B(E2) values provide insights into the validity of collective model predictions for heavy transitional nuclei and a geometric origin for the anomalous B(E2) ratios observed in nearby even-even nuclei is proposed.

Published
2022

6. 18N: a challenge to the shell model and to ab initio models of the nuclear structure of light nuclei: 18N: a challenge to the shell model and a part of the flow path to r-process element production in Type II supernovae [old title]

Author

Matta, Adrien, Catford, Wilton, Timofeyuk, Natalia, Achouri, Lynda, Delaunay, Franck, Fernandez-Dominguez, Beatriz, Flavigny, Freddie, Freeman, Sean, Gibelin, Julien, Jenkins, David, Kroell, Thorsten, Labiche, Marc, and Orr, Nigel

Subjects
Detectors and Experimental Techniques
Published
2019

7. Chronology of the three-body dissociation of 8 He

Author

Laurent, Barrallier, Marqués, Francisco Miguel, Angulo Perez, Carmen, Ashwood, N.I., Borge, María José, Bouchat, Virginie, Catford, Wilton, Clarke, Nicholas, Curtis, N., Freer, Martin, Hanappe, Francis, Kinnard, V., Labiche, Marc, Materna, Thomas, McEwan, P., Nilsson, Torbjoern, Ninane, A., Normand, G., Orr, Nigel, Pain, Steven, Prokhorova, E.V., Stuttge, Louise, Timis, C.N., Laurent, Barrallier, Marqués, Francisco Miguel, Angulo Perez, Carmen, Ashwood, N.I., Borge, María José, Bouchat, Virginie, Catford, Wilton, Clarke, Nicholas, Curtis, N., Freer, Martin, Hanappe, Francis, Kinnard, V., Labiche, Marc, Materna, Thomas, McEwan, P., Nilsson, Torbjoern, Ninane, A., Normand, G., Orr, Nigel, Pain, Steven, Prokhorova, E.V., Stuttge, Louise, and Timis, C.N.

Abstract

The space and time configurations of the dissociation of 8 He into 6 He+n+n, on C and Pb targets, have been explored simultaneously for the first time. The final-state interactions in the n-n and 6 He-n channels are successfully described within a model that considers independent emission of neutrons from a Gaussian volume with a given lifetime. The dissociation on C target exhibits a dominant sequential decay through the ground state of 7 He, consistent with neutrons being emitted from a Gaussian volume of fm with a n-n delay in the sequential channel of 1400 400 fm/c, in agreement with the lifetime of 7 He. The lower-statistics data on Pb target correspond mainly to direct breakup, and are well described using the n-n volume measured, without any n -n delay. The validity of the phenomenological model used is discussed., SCOPUS: ar.j, DecretOANoAutActif, info:eu-repo/semantics/published

Published
2019

8. Quasifree (p, 2p) reactions on oxygen isotopes: observation of isospin independence of the reduced single-particle strength

Author

Atar, Leyla, Paschalis, Stefanos, Barbieri, Carlo, Bertulani, Carlos A., Díaz Fernández, Paloma, Holl, Matthias, Najafi, Mohammad Ali, Panin, Valerii, Alvarez-Pol, Héctor, Aumann, Thomas, Avdeichikov, Vladimir, Beceiro-Novo, Saul, Bemmerer, Daniel, Benlliure Anaya, Jose Fernando, Boillos Betete, Juan Manuel, Boretzky, Konstanze, Garcia Borge, Maria José, Caamaño, Manuel, Caesar, Christoph, Casarejos Ruiz, Enrique, Catford, Wilton N., Cederkäll, Joakim, Chartier, Marielle, Chulkov, Leonid V., Cortina Gil, Dolores, Cravo, Edgar, Crespo, Raquel, Dillmann, Iris, Elekes, Zoltán, Enders, Joachim, Ershova, Olga, Estradé Vaz, Alfredo, Farinon, Fabio, Fraile Prieto, Luis Mario, Freer, Martin, Galaviz Redondo, Daniel, Geissel, Hans, Gernhäuser, Roman, Golubev, Pavel, Göbel, Kathrin, Hagdahl, Julius, Heftrich, Tanja, Heil, Michael, Heine, Marcel, Heinz, Andreas, Henriques, Ana, Hufnagel, Alexander, Ignatov, Alexander, Johansson, Håkan T., Jonson, Björn, Kahlbow, Julian, Kalantar-Nayestanaki, Nasser, Kanungo, Rituparna, Kelic-Heil, Aleksandra, Knyazev, Alexander, Kröll, Thorsten, Kurz, Nikolaus, Labiche, Marc, Langer, Christoph, Le Bleis, Tudi, Lemmon, Roy Crawford, Lindberg, Simon, Machado, Jorge, Marganiec-Gałązka, J., Movsesyan, Alina, Nácher González, Enrique, Nikolskii, Evgenii Y., Nilsson, Thomas, Nociforo, Chiara, Perea Martinez, Angel, Petri, Marina, Pietri, Stephane, Plag, Ralf, Reifarth, René, Ribeiro Jimenez, Guillermo, Rigollet, Catherine, Rossi, Dominic M., Röder, Marko, Savran, Deniz, Scheit, Heiko, Simon, Haik, Sorlin, Olivier, Syndikus, Ina, Taylor, Jonathan Thomas, Tengblad, Olof, Thies, Ronja, Togano, Yasuhiro, Vandebrouck, Marine, Velho, Paulo, Volkov, Vasily, Wagner, Andreas, Wamers, Felix, Weick, Helmut, Wheldon, Carl, Wilson, Gemma Louise, Winfield, John S., Woods, Philip John, Yakorev, Dmitry, Zhukov, Mikhail V., Zilges, Andreas, Zuber, Kai, Atar, Leyla, Paschalis, Stefanos, Barbieri, Carlo, Bertulani, Carlos A., Díaz Fernández, Paloma, Holl, Matthias, Najafi, Mohammad Ali, Panin, Valerii, Alvarez-Pol, Héctor, Aumann, Thomas, Avdeichikov, Vladimir, Beceiro-Novo, Saul, Bemmerer, Daniel, Benlliure Anaya, Jose Fernando, Boillos Betete, Juan Manuel, Boretzky, Konstanze, Garcia Borge, Maria José, Caamaño, Manuel, Caesar, Christoph, Casarejos Ruiz, Enrique, Catford, Wilton N., Cederkäll, Joakim, Chartier, Marielle, Chulkov, Leonid V., Cortina Gil, Dolores, Cravo, Edgar, Crespo, Raquel, Dillmann, Iris, Elekes, Zoltán, Enders, Joachim, Ershova, Olga, Estradé Vaz, Alfredo, Farinon, Fabio, Fraile Prieto, Luis Mario, Freer, Martin, Galaviz Redondo, Daniel, Geissel, Hans, Gernhäuser, Roman, Golubev, Pavel, Göbel, Kathrin, Hagdahl, Julius, Heftrich, Tanja, Heil, Michael, Heine, Marcel, Heinz, Andreas, Henriques, Ana, Hufnagel, Alexander, Ignatov, Alexander, Johansson, Håkan T., Jonson, Björn, Kahlbow, Julian, Kalantar-Nayestanaki, Nasser, Kanungo, Rituparna, Kelic-Heil, Aleksandra, Knyazev, Alexander, Kröll, Thorsten, Kurz, Nikolaus, Labiche, Marc, Langer, Christoph, Le Bleis, Tudi, Lemmon, Roy Crawford, Lindberg, Simon, Machado, Jorge, Marganiec-Gałązka, J., Movsesyan, Alina, Nácher González, Enrique, Nikolskii, Evgenii Y., Nilsson, Thomas, Nociforo, Chiara, Perea Martinez, Angel, Petri, Marina, Pietri, Stephane, Plag, Ralf, Reifarth, René, Ribeiro Jimenez, Guillermo, Rigollet, Catherine, Rossi, Dominic M., Röder, Marko, Savran, Deniz, Scheit, Heiko, Simon, Haik, Sorlin, Olivier, Syndikus, Ina, Taylor, Jonathan Thomas, Tengblad, Olof, Thies, Ronja, Togano, Yasuhiro, Vandebrouck, Marine, Velho, Paulo, Volkov, Vasily, Wagner, Andreas, Wamers, Felix, Weick, Helmut, Wheldon, Carl, Wilson, Gemma Louise, Winfield, John S., Woods, Philip John, Yakorev, Dmitry, Zhukov, Mikhail V., Zilges, Andreas, and Zuber, Kai

Abstract

Quasifree one-proton knockout reactions have been employed in inverse kinematics for a systematic study of the structure of stable and exotic oxygen isotopes at the R3B/LAND setup with incident beam energies in the range of 300–450 MeV/u. The oxygen isotopic chain offers a large variation of separation energies that allows for a quantitative understanding of single-particle strength with changing isospin asymmetry. Quasifree knockout reactions provide a complementary approach to intermediate-energy one-nucleon removal reactions. Inclusive cross sections for quasifree knockout reactions of the type AO(p,2p)A−1N have been determined and compared to calculations based on the eikonal reaction theory. The reduction factors for the single-particle strength with respect to the independent-particle model were obtained and compared to state-of-the-art ab initio predictions. The results do not show any significant dependence on proton-neutron asymmetry.

Published
2018

9. The application of ISS to measure E3 transition strengths in rare-earth and EDM candidate nuclei

Author

Butler, Peter, University of Liverpool, Catford, Wilton, University of Surrey, Chupp, Timothy, University of Michigan, Cline, Douglas, University of Rochester, Doherty, Daniel, Fraser, Matthew, CERN, Freeman, Sean, University of Manchester, Gaffney, Liam, Garrett, Paul, University of Guelph, Hadyńska-Klęk, Katarzyna, INFN Laboratori Nazionali di Legnaro, Hoffman, Calem, Argonne National Laboratory, Huyse, Mark, KU Leuven, Joss, David, Kay, Benjamin, Komorowska, Michalina, HIL University of Warsaw, Labiche, Marc, STFC Daresbury Laboratory, Lazarus, Ian, Napiorkowski, Paweł, Page, Robert, Raabe, Riccardo, Rodriguez, Alberto, Scheck, Marcus, University of West Scotland, Sharp, David, Stora, Thierry, Svensson, Carl, Van Duppen, Piet, Wenander, Fredrik, Wrzosek-Lipska, Katarzyna, Wu, Ching-Yen, Lawrence Livermore National Laboratory, Zielinska, Magda, and CEA Saclay

Subjects
Detectors and Experimental Techniques
Published
2017

11. Coulomb dissociation of N-20,N-21

Author

Roeder, Marko, Adachi, Tatsuya, Aksyutina, Yulia, Alcantara, Juan, Altstadt, Sebastian, Alvarez-Pol, Hector, Ashwood, Nicholas, Atar, Leyla, Aumann, Thomas, Avdeichikov, Vladimir, Barr, M, Beceiro, Saul, Bemmerer, Daniel, Benlliure, Jose, Bertulani, Carlos, Boretzky, Konstanze, Borge, Maria JG, Burgunder, G, Caamano, Manuel, Caesar, Christoph, Casarejos, Enrique, Catford, Wilton, Cederkall, Joakim, Chakraborty, S, Chartier, Marielle, Chulkov, Leonid, Cortina-Gil, Dolores, Crespo, Raquel, Pramanik, Ushasi Datta, Diaz-Fernandez, Paloma, Dillmann, Iris, Elekes, Zoltan, Enders, Joachim, Ershova, Olga, Estrade, A, Farinon, F, Fraile, Luis M, Freer, Martin, Freudenberger, M, Fynbo, Hans, Galaviz, Daniel, Geissel, Hans, Gernhaeuser, Roman, Goebel, Kathrin, Golubev, Pavel, Diaz, D Gonzalez, Hagdahl, Julius, Heftrich, Tanja, Heil, Michael, Heine, Marcel, Heinz, Andreas, Henriques, Ana, Holl, Matthias, Ickert, G, Ignatov, Alexander, Jakobsson, Bo, Johansson, Hakan, Jonson, Bjorn, Kalantar-Nayestanaki, Nasser, Kanungo, Rituparna, Kelic-Heil, Aleksandra, Knoebel, Ronja, Kroell, Thorsten, Kruecken, Reiner, Kurcewicz, J, Kurz, Nikolaus, Labiche, Marc, Langer, Christoph, Le Bleis, Tudi, Lemmon, Roy, Lepyoshkina, Olga, Lindberg, Simon, Machado, Jorge, Marganiec, Justyna, Mostazo Caro, Magdalena, Movsesyan, Alina, Najafi, Mohammad Ali, Nilsson, Thomas, Nociforo, Chiara, Panin, Valerii, Paschalis, Stefanos, Perea, Angel, Petri, Marina, Pietri, S, Plag, Ralf, Prochazka, A, Rahaman, Md Anisur, Rastrepina, Ganna, Reifarth, Rene, Ribeiro, Guillermo, Ricciardi, M Valentina, Rigollet, Catherine, Riisager, Karsten, Rossi, Dominic, del Rio Saez, Jose Sanchez, Savran, Deniz, Scheit, Heiko, Simon, Haik, Sorlin, Olivier, Stoica, V, Streicher, Branislav, Taylor, Jon, Tengblad, Olof, Terashima, Satoru, Thies, Ronja, Togano, Yasuhiro, Uberseder, Ethan, Van de Walle, J, Velho, Paulo, Volkov, Vasily, Wagner, Andreas, Wamers, Felix, Weick, Helmut, Weigand, Mario, Wheldon, Carl, Wilson, G, Wimmer, Christine, Winfield, JS, Woods, Philip, Yakorev, Dmitry, Zhukov, Mikhail, Zilges, Andreas, Zuber, Kai, and Collaboration, R3B

Published
2016

12. Coulomb dissociation of N 20,21

Author

Röder, Marko, Adachi, Tatsuya, Aksyutina, Yulia, Alcantara, Juan, Altstadt, Sebastian, Alvarez-Pol, Hector, Ashwood, Nicholas, Atar, Leyla, Aumann, Thomas, Avdeichikov, Vladimir, Barr, M., Beceiro, Saul, Bemmerer, Daniel, Benlliure, Jose, Bertulani, Carlos, Boretzky, Konstanze, Borge, Maria J G, Burgunder, G., Caamaño, Manuel, Caesar, Christoph, Casarejos, Enrique, Catford, Wilton, Cederkäll, Joakim, Chakraborty, S., Chartier, Marielle, Chulkov, Leonid, Cortina-Gil, Dolores, Crespo, Raquel, Datta Pramanik, Ushasi, Diaz-Fernandez, Paloma, Dillmann, Iris, Elekes, Zoltan, Enders, Joachim, Ershova, Olga, Estrade, A., Farinon, F., Fraile, Luis M., Freer, Martin, Freudenberger, M., Fynbo, Hans, Galaviz, Daniel, Geissel, Hans, Gernhäuser, Roman, Göbel, Kathrin, Golubev, Pavel, Gonzalez Diaz, D., Hagdahl, Julius, Heftrich, Tanja, Heil, Michael, Heine, Marcel, Heinz, Andreas, Henriques, Ana, Holl, Matthias, Ickert, G., Ignatov, Alexander, Jakobsson, Bo, Johansson, Håkan, Jonson, Björn, Kalantar-Nayestanaki, Nasser, Kanungo, Rituparna, Kelic-Heil, Aleksandra, Knöbel, Ronja, Kröll, Thorsten, Krücken, Reiner, Kurcewicz, J., Kurz, Nikolaus, Labiche, Marc, Langer, Christoph, Le Bleis, Tudi, Lemmon, Roy, Lepyoshkina, Olga, Lindberg, Simon, Machado, Jorge, Marganiec, Justyna, Mostazo Caro, Magdalena, Movsesyan, Alina, Najafi, Mohammad Ali, Nilsson, Thomas, Nociforo, Chiara, Panin, Valerii, Paschalis, Stefanos, Perea, Angel, Petri, Marina, Pietri, S., Plag, Ralf, Prochazka, A., Rahaman, Md Anisur, Rastrepina, Ganna, Reifarth, Rene, Ribeiro, Guillermo, Ricciardi, M. Valentina, Rigollet, Catherine, Riisager, Karsten, Rossi, Dominic, Sanchez Del Rio Saez, Jose, Savran, Deniz, Scheit, Heiko, Simon, Haik, Sorlin, Olivier, Stoica, V., Streicher, Branislav, Taylor, Jon, Tengblad, Olof, Terashima, Satoru, Thies, Ronja, Togano, Yasuhiro, Uberseder, Ethan, Van De Walle, J., Velho, Paulo, Volkov, Vasily, Wagner, Andreas, Wamers, Felix, Weick, Helmut, Weigand, Mario, Wheldon, Carl, Wilson, G., Wimmer, Christine, Winfield, J. S., Woods, Philip, Yakorev, Dmitry, Zhukov, Mikhail, Zilges, Andreas, and Zuber, Kai

Abstract

Neutron-rich light nuclei and their reactions play an important role in the creation of chemical elements. Here, data from a Coulomb dissociation experiment on N20,21 are reported. Relativistic N20,21 ions impinged on a lead target and the Coulomb dissociation cross section was determined in a kinematically complete experiment. Using the detailed balance theorem, the N19(n,γ)N20 and N20(n,γ)N21 excitation functions and thermonuclear reaction rates have been determined. The N19(n,γ)N20 rate is up to a factor of 5 higher at T

Published
2016

14. Single-proton removal reaction study of 16B

Author

Lecouey, Jean Luc, Orr, Nigel, Marqués, Francisco Miguel, Achouri, N. L., Angélique, Jean Claude, Brown, Bruce, Carstoiu, Florin, Catford, Wilton, Clarke, Nicholas, Freer, Martin, Fulton, Brian, Grévy, Stéphane, Hanappe, Francis, Jones, Kate, Labiche, Marc, Lemmon, Roy, Ninane, A., Sauvan, Emmanuel, Spohr, Klaus, Stuttge, Louise, Lecouey, Jean Luc, Orr, Nigel, Marqués, Francisco Miguel, Achouri, N. L., Angélique, Jean Claude, Brown, Bruce, Carstoiu, Florin, Catford, Wilton, Clarke, Nicholas, Freer, Martin, Fulton, Brian, Grévy, Stéphane, Hanappe, Francis, Jones, Kate, Labiche, Marc, Lemmon, Roy, Ninane, A., Sauvan, Emmanuel, Spohr, Klaus, and Stuttge, Louise

Abstract

The low-lying level structure of the unbound system 16B has been investigated via single-proton removal from a 35 MeV/nucleon 17C beam. The coincident detection of the beam velocity 15B fragment and neutron allowed the relative energy of the in-flight decay of 16B to be reconstructed. The resulting spectrum exhibited a narrow peak some 85 keV above threshold. It is argued that this feature most probably corresponds to a very narrow (Γ ≪ 100 keV) resonance with a dominant π (p3 / 2)-1 ⊗ ν (d5 / 23)J = 3 / 2+ + π (p3 / 2)-1 ⊗ ν (d5 / 22, s1 / 2)J = 3 / 2+ configuration which decays by d-wave neutron emission. © 2009 Elsevier B.V. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2009

15. B (E 1) strengths from Coulomb excitation of 11Be

Author

Summers, N.C. N.C., Pain, Steven, Nunes, Filomena Maciel, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Thompson, Ian J., Winfield, J.S. J.S., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Stuttge, Louise, Summers, N.C. N.C., Pain, Steven, Nunes, Filomena Maciel, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Thompson, Ian J., Winfield, J.S. J.S., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., and Stuttge, Louise

Abstract

The B (E 1 ;1 / 2+ → 1 / 2-) strength for 11Be has been extracted from intermediate energy Coulomb excitation measurements, over a range of beam energies using a new reaction model, the extended continuum discretized coupled channels (XCDCC) method. In addition, a measurement of the excitation cross section for 11Be + 208Pb at 38.6 MeV/nucleon is reported. The B (E 1) strength of 0.105(12) e2 fm2 derived from this measurement is consistent with those made previously at 60 and 64 MeV/nucleon, in contrast to an anomalously low result obtained at 43 MeV/nucleon. By coupling a multi-configuration description of the projectile structure with realistic reaction theory, the XCDCC model provides for the first time a fully quantum mechanical description of Coulomb excitation. The XCDCC calculations reveal that the excitation process involves significant contributions from nuclear, continuum, and higher-order effects. An analysis of the present and two earlier intermediate energy measurements yields a combined B(E1) strength of 0.105(7) e2 fm2. This value is in good agreement with the value deduced independently from the lifetime of the 1 / 2- state in 11Be, and has a comparable precision. © 2007 Elsevier B.V. All rights reserved., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2007

16. Structure of Be12: Intruder d-wave strength at N=8

Author

Pain, Steven, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Tostevin, Jeffrey J.A., Winfield, J.S. J.S., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Stuttge, Louise, Pain, Steven, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Tostevin, Jeffrey J.A., Winfield, J.S. J.S., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., and Stuttge, Louise

Abstract

The breaking of the N=8 shell-model magic number in the Be12 ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than Be12. The occupancies of the 0ω νp1/2 orbital and the 1 ω, νd5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy Be12 beam leading to bound and unbound states in Be11. © 2006 The American Physical Society., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2006

17. Evidence of a (1d 5/2) 2 component to the 12Be ground state

Author

Pain, Steven, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Tostevin, Jeffrey J.A., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Stuttge, Louise, Winfield, J.S. J.S., Pain, Steven, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Tostevin, Jeffrey J.A., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Stuttge, Louise, and Winfield, J.S. J.S.

Abstract

Data have been obtained on exclusive single neutron knockout cross sections from 12Be to study its ground state structure. The cross sections for the production of 11Be in its ground state (1/2 +) and first excited state (0.32 MeV, 1/2 -) have previously been measured, indicating a strong (2s 1 2) 2 component to the 12Be ground state. In the present experiment, performed at the GANIL laboratory, cross sections for the first (0.32 MeV, 1/2 -) and second (1.78 MeV, 5/2 +, unbound) excited states in 11Be were measured, which gives information on the admixture of (1p 1 2) 2 and (1d 5 2) 2 components in the ground state of 12Be. A fragmentation beam of 12Be of ∼10000 pps (95% pure) was incident on a carbon target at 41 MeV/u. The beam particles were tracked onto the target, and their energies were measured event-by-event. The beam-like residues were measured in a position sensitive telescope mounted at zero degrees, and neutrons were measured in the DéMoN array. The 1/2 - state of 11Be was identified by measuring coincident 320 keV γ-rays, using four NaI detectors. Full kinematic reconstruction of unbound states in 11Be was performed using coincident neutrons and 10Be ions. Detailed simulations were performed in order to interpret the data, and spectroscopic factors were calculated, using preliminary single particle removal cross sections calculated using a Glauber model. © 2005 American Institute of Physics., SCOPUS: cp.p, info:eu-repo/semantics/published

Published
2005

18. Experimental evidence of a ν(1d5/2)2 component to the 12Be ground state

Author

Pain, Steven, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Tostevin, Jeffrey J.A., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Stuttge, Louise, Winfield, J.S. J.S., Pain, Steven, Catford, Wilton, Mahboub, Djelloul, Timis, C.N., Tostevin, Jeffrey J.A., Orr, Nigel, Angélique, Jean Claude, Lecouey, Jean Luc, Normand, G., Ashwood, N.I., Clarke, Nicholas, Curtis, N., Freer, Martin, Soić, Neven, Ziman, V.A., Bouchat, Virginie, Hanappe, Francis, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Stuttge, Louise, and Winfield, J.S. J.S.

Abstract

Data have been obtained on exclusive single neutron knockout cross sections from 12Be to study its ground state structure. Preliminary cross sections for the first (0.32 MeV, 1/2-) and second (1.78 MeV, 5/2+, unbound) excited states in 11Be have been obtained, giving evidence of significant admixtures of both ν(1p1/2) 2 and ν(1d5/2)2 configurations in the ground state of 12Be. © Società Italiana di Fisica / Springer-Verlag 2005., SCOPUS: cp.j, info:eu-repo/semantics/published

Published
2005

19. Investigation of the Dipole Response in Exotic Nuclei – Experiments at the LAND-R$^3$B Setup

Author

Rossi, Dominic M., primary, Adrich, Przemyslaw, additional, Aksouh, Farouk, additional, Alvarez-Pol, Hector, additional, Aumann, Thomas, additional, Benlliure, Jose, additional, Böhmer, Michael, additional, Boretzky, Konstanze, additional, Casarejos, Enrique, additional, Chartier, Marielle, additional, Chatillon, Audrey, additional, Cortina-Gil, Dolores, additional, Datta Pramanik, Ushasi, additional, Emling, Hans, additional, Ershova, Olga, additional, Fernando-Dominguez, Beatriz, additional, Geissel, Hans, additional, Gorska, Magda, additional, Heil, Michael, additional, Johansson, Håkan, additional, Junghans, Arnd R., additional, Kiselev, Oleg, additional, Klimkiewicz, Adam, additional, Kratz, Jens Volker, additional, Kurz, Nikolaus, additional, Labiche, Marc, additional, Le Bleis, Tudi, additional, Lemmon, Roy, additional, Litvinov, Yuri A., additional, Mahata, Kripamay, additional, Maierbeck, Peter, additional, Movsesyan, Alina, additional, Nilsson, Thomas, additional, Nociforo, Chiara, additional, Palit, Rudrayoti, additional, Paschalis, Stefanos, additional, Plag, Ralf, additional, Reifarth, René, additional, Simon, Haik, additional, Sümmerer, Klaus, additional, Wagner, Andreas, additional, Walus, Wladyslaw, additional, Weick, Helmut, additional, and Winkler, Martin, additional

Published
2012
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20. Helium clustering in neutron-rich Be isotopes

Author

Ashwood, N.I., Freer, Martin, Ahmed, Shabbir, Clarke, Nicholas, Curtis, N., Soić, Neven, Ziman, V.A., Angélique, Jean Claude, Catford, Wilton, Lecouey, Jean Luc, Marqués, Francisco Miguel, Normand, G., Orr, Nigel, Timis, C.N., Bouchat, Virginie, Hanappe, Francis, Kerckx, Yannick, Materna, Thomas, Pain, Steven, Dorvaux, O., Stuttge, Louise, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Unshakova, A., Winfield, J.S. J.S., Ashwood, N.I., Freer, Martin, Ahmed, Shabbir, Clarke, Nicholas, Curtis, N., Soić, Neven, Ziman, V.A., Angélique, Jean Claude, Catford, Wilton, Lecouey, Jean Luc, Marqués, Francisco Miguel, Normand, G., Orr, Nigel, Timis, C.N., Bouchat, Virginie, Hanappe, Francis, Kerckx, Yannick, Materna, Thomas, Pain, Steven, Dorvaux, O., Stuttge, Louise, Fulton, Brian, Labiche, Marc, Lemmon, Roy, Ninane, A., Unshakova, A., and Winfield, J.S. J.S.

Abstract

Measurements of the helium-cluster breakup and neutron removal cross-sections for neutron-rich Be isotopes 10-12,14Be are presented. These have been studied in the 30 to 42 MeV/nucleon energy range where reaction measurements are proposed to be sensitive to the cluster content of the ground-state wave-function. These measurements provide a comprehensive survey of the decay processes of the Be isotopes by which the valence neutrons are removed revealing the underlying α-α core-cluster structure. The measurements indicate that clustering in the Be isotopes remains important up to the drip-line nucleus 14Be and that the dominant helium-cluster structure in the neutron-rich Be isotopes corresponds to α-Xn-α. © 2003 Published by Elsevier B.V., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004

21. Neutron removal and cluster breakup of 14B and 14Be

Author

Ashwood, N.I., Freer, Martin, Clarke, Nicholas, Curtis, N., Soić, Neven, Ziman, V.A., Angélique, Jean Claude, Catford, Wilton, Lecouey, Jean Luc, Marqués, Francisco Miguel, Normand, G., Orr, Nigel, Timis, C.N., Bouchat, Virginie, Hanappe, Francis, Kerckx, Yannick, Materna, Thomas, Pain, Steven, Dorvaux, O., Stuttge, Louise, Labiche, Marc, Ninane, A., Unshakova, A., Ashwood, N.I., Freer, Martin, Clarke, Nicholas, Curtis, N., Soić, Neven, Ziman, V.A., Angélique, Jean Claude, Catford, Wilton, Lecouey, Jean Luc, Marqués, Francisco Miguel, Normand, G., Orr, Nigel, Timis, C.N., Bouchat, Virginie, Hanappe, Francis, Kerckx, Yannick, Materna, Thomas, Pain, Steven, Dorvaux, O., Stuttge, Louise, Labiche, Marc, Ninane, A., and Unshakova, A.

Abstract

Measurements of the neutron removal and cluster breakup cross sections for the neutron-rich nuclei 14Be and 14B have been performed at 34.4 and 40.8 MeV/nucleon, respectively. Enhancement of the first chance cluster breakup cross section for 14Be compared to that of 14B provides evidence for a well-developed He cluster structure of the ground state of 14Be. Measurements of both the cross sections and decay-particle velocities suggest that multistep processes play an important role in the excitation and decay of both 14B and 14Be., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004

22. Measurements of the breakup and neutron removal cross sections for 16C

Author

Ashwood, N.I., Freer, Martin, Angélique, Jean Claude, Bouchat, Virginie, Catford, Wilton, Clarke, Nicholas, Curtis, N., Dorvaux, O., Hanappe, Francis, Kerckx, Yannick, Labiche, Marc, Lecouey, Jean Luc, Marqués, Francisco Miguel, Materna, Thomas, Ninane, A., Normand, G., Orr, Nigel, Pain, Steven, Soić, Neven, Stuttge, Louise, Timis, C.N., Unshakova, A., Ziman, V.A., Ashwood, N.I., Freer, Martin, Angélique, Jean Claude, Bouchat, Virginie, Catford, Wilton, Clarke, Nicholas, Curtis, N., Dorvaux, O., Hanappe, Francis, Kerckx, Yannick, Labiche, Marc, Lecouey, Jean Luc, Marqués, Francisco Miguel, Materna, Thomas, Ninane, A., Normand, G., Orr, Nigel, Pain, Steven, Soić, Neven, Stuttge, Louise, Timis, C.N., Unshakova, A., and Ziman, V.A.

Abstract

Measurements of the breakup and the neutron removal reactions of 16C have been made at 46 MeV/A and the decay cross sections measured. A correlation between the cluster breakup channels and the reaction Q value suggests that the reaction mechanism is strongly linked to quasielastic processes. No enhancement of the two-body cluster breakup cross section is seen for 16C. This result would indicate that 16C does not have a well developed cluster structure in the ground state, in agreement with recent calculations., SCOPUS: ar.j, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2004

23. Radiative proton capture on 6He

Author

Wilschut, Hans H.W., Kugler, Andrej, Kravchuk, Vladimir, Liénard, Etienne, Löhner, Herbert, Mittig, Wolfgang, Ostendorf, Reint R.W., Pietri, Stéphane, Roussel-Chomaz, Patricia, Saint-Laurent, Marie Genevieve, Savajols, Hervé, Orr, Nigel, Wagner, Vladimir, Yahlali, Nadia, Sauvan, Emmanuel, Marqués, Francisco Miguel, Labiche, Marc, Le Brun, Christian, Angélique, Jean Claude, Borcea, Catalin, Catford, Wilton, Clarke, Nicholas, Descouvemont, Pierre, Díaz, José, Grévy, Stéphane, Wilschut, Hans H.W., Kugler, Andrej, Kravchuk, Vladimir, Liénard, Etienne, Löhner, Herbert, Mittig, Wolfgang, Ostendorf, Reint R.W., Pietri, Stéphane, Roussel-Chomaz, Patricia, Saint-Laurent, Marie Genevieve, Savajols, Hervé, Orr, Nigel, Wagner, Vladimir, Yahlali, Nadia, Sauvan, Emmanuel, Marqués, Francisco Miguel, Labiche, Marc, Le Brun, Christian, Angélique, Jean Claude, Borcea, Catalin, Catford, Wilton, Clarke, Nicholas, Descouvemont, Pierre, Díaz, José, and Grévy, Stéphane

Abstract

(a) Radiative proton capture on 6He was investigated. (b) Events on a halo neutron, the α core and 5He were recorded using quasifree capture (QFC) processes. (c) It was shown that radiative capture may provide a new probe for the study of clustering in the ground state of nuclei far from stability., SCOPUS: ar.j, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2001

24. Helium breakup states in 10Be and 12Be

Author

Freer, Martin, Angélique, Jean Claude, Axelsson, Lars Uno, Benoit, Bénédicte, Bergmann, Uffe, Catford, Wilton, Chappell, Steve, Clarke, Nicholas, Curtis, N., D'Arrigo, Alberto, De Góes Brennard, E., Dorvaux, O., Fulton, Brian, Giardina, Giorgio, Gregori, C., Grévy, Stéphane, Hanappe, Francis, Kelly, Geoff, Labiche, Marc, Le Brun, Christian, Leenhardt, S., Lewitowicz, Marek, Markenroth, Karin, Marqués, Francisco Miguel, Murgatroyd, Julian, Nilsson, Thomas, Ninane, A., Orr, Nigel, Piqueras, Ignacio, Saint-Laurent, Marie Genevieve, Singer, Stanley, Sorlin, Olivier, Stuttge, Louise, Watson, D.L., Freer, Martin, Angélique, Jean Claude, Axelsson, Lars Uno, Benoit, Bénédicte, Bergmann, Uffe, Catford, Wilton, Chappell, Steve, Clarke, Nicholas, Curtis, N., D'Arrigo, Alberto, De Góes Brennard, E., Dorvaux, O., Fulton, Brian, Giardina, Giorgio, Gregori, C., Grévy, Stéphane, Hanappe, Francis, Kelly, Geoff, Labiche, Marc, Le Brun, Christian, Leenhardt, S., Lewitowicz, Marek, Markenroth, Karin, Marqués, Francisco Miguel, Murgatroyd, Julian, Nilsson, Thomas, Ninane, A., Orr, Nigel, Piqueras, Ignacio, Saint-Laurent, Marie Genevieve, Singer, Stanley, Sorlin, Olivier, Stuttge, Louise, and Watson, D.L.

Abstract

The breakup of 10,12Be into He clusters has been studied using the p, 12C(12Be,6He,6He) and 12C(12Be,4He,6He) inelastic scattering and two neutron transfer reactions with a 378 MeV 12Be beam incident on 12C and (CH2)n targets. Evidence has been found for three new states in 10Be at excitation energies of 13.2, 14.8, and 16.1 MeV, which may be associated with a 4He+6He cluster structure. The evidence for He cluster states in 12Be in the excitation energy range 12 to 25 MeV is also discussed., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2001

25. Halo structure of 14Be

Author

Labiche, Marc, Benoit, Bénédicte, D'Arrigo, Alberto, De Goes Brennand, Edna Gusmão E., Hanappe, Francis, Labiche, Marc, Benoit, Bénédicte, D'Arrigo, Alberto, De Goes Brennand, Edna Gusmão E., and Hanappe, Francis

Abstract

The first kinematically complete breakup reaction study of 14Be was carried out. The two-neutron removal cross sections, neutron angular distributions, and invariant mass spectra for reactions on C and Pb were measured and the electromagnetic component of the dissociation (EMD) contributions deduced. Comparison with model calculations suggest that the configuration of the halo neutrons contains a large v(2s 1/2 )2 admixture., 0, SCOPUS: ar.j, info:eu-repo/semantics/published

Published
2001

26. Exotic molecular states in 12Be

Author

Freer, Martin, Angélique, Jean Claude, Axelsson, Lars Uno, Benoit, Bénédicte, Bergmann, Uffe, Catford, Wilton, Chappell, Steve, Clarke, Nicholas, Curtis, N., D'Arrigo, Alberto, De Góes Brennard, E., Dorvaux, O., Fulton, Brian, Giardina, Giorgio, Gregori, C., Grévy, Stéphane, Hanappe, Francis, Kelly, Geoff, Labiche, Marc, Le Brun, Christian, Leenhardt, S., Lewitowicz, Marek, Markenroth, Karin, Marqués, Francisco Miguel, Motta, Mariele, Murgatroyd, Julian, Nilsson, Thomas, Ninane, A., Orr, Nigel, Piqueras, Ignacio, Saint-Laurent, Marie Genevieve, Singer, Stanley, Sorlin, Olivier, Stuttge, Louise, Watson, D.L., Freer, Martin, Angélique, Jean Claude, Axelsson, Lars Uno, Benoit, Bénédicte, Bergmann, Uffe, Catford, Wilton, Chappell, Steve, Clarke, Nicholas, Curtis, N., D'Arrigo, Alberto, De Góes Brennard, E., Dorvaux, O., Fulton, Brian, Giardina, Giorgio, Gregori, C., Grévy, Stéphane, Hanappe, Francis, Kelly, Geoff, Labiche, Marc, Le Brun, Christian, Leenhardt, S., Lewitowicz, Marek, Markenroth, Karin, Marqués, Francisco Miguel, Motta, Mariele, Murgatroyd, Julian, Nilsson, Thomas, Ninane, A., Orr, Nigel, Piqueras, Ignacio, Saint-Laurent, Marie Genevieve, Singer, Stanley, Sorlin, Olivier, Stuttge, Louise, and Watson, D.L.

Abstract

The breakup of 12Be into 6He + 6He and 4He + 8He has been studied using a 378 MeV 12Be beam inelastically excited by 12C and (CH2)n targets. The measurements indicate that breakup occurs from rotational states in the 10 to 25 MeV excitation energy interval, with spins in the range of 4ℏ to 8ℏ. The inferred moment of inertia is consistent with the cluster decay of an exotic molecular structure in 12Be, which may be associated with an α-4n-α cluster configuration., SCOPUS: ar.j, info:eu-repo/semantics/published

Published
1999

27. Emittance growth in a plasma wakefield accelerator

Author

Mete, Oznur, Hanahoe, Kieran, Labiche, Marc, and Xia, Guoxing

Subjects
Accelerator Physics (physics.acc-ph), Physics::Plasma Physics, FOS: Physical sciences, 3: Alternative Particle Sources and Acceleration Techniques, Physics::Accelerator Physics, Physics - Accelerator Physics, Accelerator Physics
Abstract

The interaction of the witness beam with the surrounding plasma particles and wakefields was studied. The impli- cations of the elastic scattering process on beam emittance and, emittance evolution under the focusing and acceleration provided by plasma wakefields were discussed. Simulations results from GEANT4 are presented in this paper., Presented in IPAC2015

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