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2 results on '"Machado, J. F. D. C."'

1. Probing the Z = 6 spin-orbit shell gap with (p,2p) quasi-free scattering reactions

Author

Syndikus, I., Petri, M., Macchiavelli, A. O., Paschalis, S., Bertulani, C. A., Aumann, T., Alvarez-Pol, H., Atar, L., Beceiro-Novo, S., Benlliure, J., Boillos, J. M., Boretzky, K., Borge, M. J. G., Brown, B. A., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chulkov, L. V., Cortina-Gil, D., Cravo, E., Crespo, R., Dillmann, I., Fernández, P. Díaz, Elekes, Z., Enders, J., Farinon, F., Fraile, L. M., Redondo, D. Galaviz, Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kröll, T., Kurz, N., Langer, C., Bleis, T. Le, Machado, J. F. D. C., Marganiec-Gałazka, J., Nacher, E., Nilsson, T., Nociforo, C., Panin, V., Perea, A., Pietri, S. B., Plag, R., Reifarth, R., Revel, A., Ribeiro, G., Rigollet, C., Rossi, D. M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Tengblad, O., Togano, Y., Vandebrouck, M., Volkov, V., Wheldon, F. Wamers C., Wilson, G. L., Winfield, J. S., Weick, H., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., and Zuber, K.

Subjects
Nuclear Experiment
Abstract

The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nuclei and understanding the driving mechanism behind the shell evolution. In this work, we investigate the Z = 6 spin-orbit shell gap towards the neutron dripline. To do so, we employed $^{A}$N(p,2p)$^{A-1}$C quasi-free scattering reactions to measure the proton component of the 2$^+_1$ state of $^{16,18,20}$C. The experimental findings support the notion of a moderate reduction of the proton 1p$_{1/2}$-1p$_{3/2}$ spin-orbit splitting, at variance to recent claims for a prevalent Z = 6 magic number towards the neutron dripline., Comment: 27 pages, 5 figures, 2 tables. Submitted to Physics Letter B

Published
2020
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2. Isotopic cross sections of fragmentation residues produced by light projectiles on carbon near 400A MeV

Author

Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., (0000-0003-0470-8367) Bemmerer, D., Bertulani, C. A., Boretzky, K., Borge, M. J. G., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N. P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Galaviz Redondo, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F. D. C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M. A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, O., Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J. F., Volkov, V., (0000-0001-7575-3961) Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K., Boillos, J. M., Cortina-Gil, D., Benlliure, J., Rodríguez-Sánchez, J. L., Alvarez-Pol, H., Atar, L., Aumann, T., Avdeichikov, V. V., Beceiro-Novo, S., (0000-0003-0470-8367) Bemmerer, D., Bertulani, C. A., Boretzky, K., Borge, M. J. G., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chartier, M., Chulkov, L., Cravo, E., Crespo, R. N. P., Dillmann, I., Díaz Fernández, P., Elekes, Z., Enders, J., Ershova, O., Estrade, A., Farinon, F., Fraile, L. M., Freer, M., Galaviz Redondo, D., Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Hagdahl, J., Heftrich, T., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Hufnagel, A., Ignatov, A., Johansson, H. T., Jonson, B., Kahlbow, J., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Knyazev, A., Kröll, T., Kurz, N., Labiche, M., Langer, C., Le Bleis, T., Lemmon, R., Lindberg, S., Machado, J. F. D. C., Marganiec, J., Movsesyan, A., Nacher, E., Najafi, M. A., Nilsson, T., Nociforo, C., Panin, V., Paschalis, S., Perea, A., Petri, M., Pietri, S., Plag, R., Reifarth, R., Ribeiro, G., Rigollet, C., Rossi, D. M., Röder, M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Syndikus, I. J., Taylor, J. T., Tengblad, O., Thies, R., Togano, Y., Vandebrouck, M., Velho, P. J. F., Volkov, V., (0000-0001-7575-3961) Wagner, A., Wamers, F., Weick, H., Wheldon, C., Wilson, G. L., Winfield, J. S., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., and Zuber, K.

Abstract

We measured 135 cross sections of residual nuclei produced in fragmentation reactions of 12C, 14N, and 13−16,20,22O projectiles impinging on a carbon target at kinetic energies of near 400A MeV, most of them for the first time, with the R 3B/LAND setup at the GSI facility in Darmstadt (Germany). The use of this state-of-the-art experimental setup in combination with the inverse kinematics technique gave the full identification in atomic and mass numbers of fragmentation residues with a high precision. The cross sections of these residues were determined with uncertainties below 20% for most of the cases. These data are compared to other previous measurements with stable isotopes and are also used to benchmark different model calculations.

Published
2022

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