@article{3050694,
    title = "Spectator nucleons in Pb+Pb collisions at 158 A center dot GeV",
    author = "Appelshauser, H and Bachler, J and Bailey, SJ and Barnby, LS and Bartke, and J and Barton, RA and Bialkowska, H and Blyth, CO and Bock, R and and Bormann, C and Brady, FP and Brockmann, R and Buncic, N and Buncic, P and and Caines, HL and Cebra, D and Chan, P and Cooper, GE and Cramer, JG and and Cramer, PB and Csato, P and Dunn, J and Eckardt, V and Eckhardt, F and and Ferguson, MI and Fischer, HG and Flierl, D and Fodor, Z and Foka, P and and Freund, P and Friese, V and Fuchs, M and Gabler, F and Gal, J and and Gazdzicki, M and Gladysz, E and Gorodetsky, P and Grebieszkow, J and and Gunther, J and Harris, JW and Hegyi, S and Henkel, T and Hill, LA and and Huang, I and Hummler, H and Igo, G and Irmscher, D and Jacobs, P and and Jones, PG and Kadija, K and Kolesnikov, VI and Kowalski, M and Lasiuk, B and and Levai, P and Malakhov, AI and Margetis, S and Markert, C and and Melkumov, GL and Mock, A and Molnar, J and Nelson, JM and Odyniec, G and and Palla, G and Panagiotou, AD and Petridis, A and Piper, A and Porter, RJ and and Poskanzer, AM and Poziombka, S and Prindle, DJ and Puhlhofer, F and and Rauch, W and Reid, JG and Renfordt, R and Retyk, W and Ritter, HG and and Rohrich, D and Roland, C and Roland, G and Rudolph, H and Rybicki, A and and Sakrejda, I and Sandoval, A and Sann, H and Semenov, AY and Schafer, E and and Schmischke, D and Schmitz, N and Schonfelder, S and Seyboth, P and and Seyerlein, J and Sikler, F and Skrzypczak, E and Squier, GTA and Stock, and R and Strobele, H and Szentpetery, I and Sziklai, J and Toy, M and and Trainor, TA and Trentalange, S and Ullrich, T and Vassiliou, M and and Vesztergombi, G and Vranic, D and Wang, F and Weerasundara, DD and and Wenig, S and White, S and Whitten, C and Wienold, T and Wood, L and and Yates, TA and Zimanyi, J and Zhu, XZ and Zybert, R and NA49 and Collaboration",
    journal = "The European Physical Journal A - Hadrons and Nuclei",
    year = "1998",
    volume = "2",
    number = "4",
    pages = "383-390",
    publisher = "Springer-Verlag",
    issn = "1434-6001, 1434-601X",
    doi = "10.1007/s100500050135",
    abstract = "The composition of forward-going projectile spectator matter in
fixed-target Pb+Pb collisions at 158 A.GeV at the CERN SPS has been
studied as a function of centrality. The data were measured with the
NA49 veto calorimeter. We observe that forward-going spectator matter in
central collisions consists of 9 neutrons, 7 protons, and half a
deuteron on average. At large impact parameters most spectator nucleons
are bound in fragments. The relative resolution of the average impact
parameter derived from the measurement of spectator neutrons is roughly
19% in the range from zero to half maximum impact parameters."
}