Diverse mechanisms in proton knockout reactions from the Borromean nucleus Ne-17

Abstract Ämnesord

Stäng

Nucleon knockout experiments using beryllium or carbon targets reveal a strong dependence of the quenching factors, i.e., the ratio (Rs) of theoretical to the experimental spectroscopic factors (C2S), on the proton-neutron asymmetry in the nucleus under study. However, this dependence is greatly reduced when a hydrogen target is used. To understand this phenomenon, exclusive H-1(Ne-17, 2p F-16) and inclusive C-12(Ne-17, 2p 1(6)F)X, 1(2)C(Ne-17, F-16)X as well as 1H(Ne-17,(16) F)X(X-denotes undetected reaction products) reactions with F-16 in the ground and excited states were anal- ysed. The longitudinal momentum distribution of F-16 and the correlations between the detached protons were studied. In the case of the carbon target, there is a significant deviation from the predictions of the eikonal model. The eikonal approximation was used to extract spectroscopic factor values (CS)-S-2. The experimental (CS)-S-2 value obtained with C target is markedly lower than that for H target. This is interpreted as rescattering due to simultaneous nucleon knockout from both reaction partners, Ne-17 and C-12.

Av författaren/redakt...: Wamers, F.; Lehr, C.; Marganiec-Galazk ...; Aksouh, F.; Aksyutina, Yu.; Alvarez-Pol, H.; visa fler...; Atar, L.; Aumann, T.; Beceiro-Novo, S.; Bertulani, C. A.; Boretzky, K.; Borge, M. J. G.; Caesar, C.; Chartier, M.; Chatillon, A.; Chulkov, L. V.; Cortina-Gil, D.; Diaz Fernandez, ...; Emling, H.; Ershova, O.; Lantz, Mattias, ...; Fynbo, H. O. U.; Galaviz, D.; Geissel, H.; Heil, M.; Holl, Matthias, ...; Johansson, Håkan ...; Jonson, Björn, 1 ...; Karagiannis, C.; Kiselev, O. A.; Kratz, J. V.; Kulessa, R.; Kurz, N.; Langer, C.; Lantz, Mattias, ...; Le Bleis, T.; Lemmon, R.; Litvinov, Yu. A.; Mahata, K.; Muentz, C.; Nilsson, Thomas, ...; Nociforo, C.; Ott, W.; Panin, V.; Paschalis, S.; Perea, A.; Plag, R.; Reifarth, R.; Richter, A.; Riisager, K.; Rodriguez-Tajes, ...; Rossi, D.; Savran, D.; Scheit, H.; Schrieder, G.; Schrock, P.; Simon, H.; Stroth, J.; Suemmerer, K.; Tengblad, O.; Weick, H.; Wimmer, C.; visa färre...

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