Emission of forward neutrons by 158A GeV indium nuclei in collisions with Al, Cu, Sn and Pb

Karpechev, E.V.; Ferretti, A.; Karavicheva, T.L.; De Marco, N.; Maevskaya, A.I.; Dellacasa, G.; Piccotti, A.; Topilskaya, N.S.; Golubeva, M.B.; Efthymiopoulos, I.; Arnaldi, R.; Guber, F.F.; Cicalo, C.; Siddi, E.; Kurepin, A.B.; Scomparin, E.; Tiflov, V.V.; Puddu, G.; Oppedisano, C.; Vercellin, E.; Reshetin, A.I.; Pshenichnov, I.A.; Musso, A.; Szymanski, P.; Cortese, P.; Gallio, M.

doi:10.1016/j.nuclphysa.2013.11.003

Article
Report number	arXiv:1307.5548
Title	Emission of forward neutrons by 158A GeV indium nuclei in collisions with Al, Cu, Sn and Pb
Author(s)	Karpechev, E.V. (Moscow, INR) ; Pshenichnov, I.A. (Moscow, INR) ; Karavicheva, T.L. (Moscow, INR) ; Kurepin, A.B. (Moscow, INR) ; Golubeva, M.B. (Moscow, INR) ; Guber, F.F. (Moscow, INR) ; Maevskaya, A.I. (Moscow, INR) ; Reshetin, A.I. (Moscow, INR) ; Tiflov, V.V. (Moscow, INR) ; Topilskaya, N.S. (Moscow, INR) ; Cortese, P. (Trieste, TASC ; Turin U., Alessandria) ; Dellacasa, G. (Trieste, TASC ; Turin U., Alessandria) ; Arnaldi, R. (Turin U. ; INFN, Turin) ; De Marco, N. (INFN, Turin ; Turin U.) ; Ferretti, A. (Turin U. ; INFN, Turin) ; Gallio, M. (Turin U. ; INFN, Turin) ; Musso, A. (Turin U. ; INFN, Turin) ; Oppedisano, C. (Turin U. ; INFN, Turin) ; Piccotti, A. (Turin U. ; INFN, Turin) ; Scomparin, E. (Turin U. ; INFN, Turin) ; Vercellin, E. (Turin U. ; INFN, Turin) ; Cicalo, C. (Cagliari U. ; INFN, Cagliari) ; Puddu, G. (Cagliari U. ; INFN, Cagliari) ; Siddi, E. (Cagliari U. ; INFN, Cagliari) ; Szymanski, P. (CERN ; Warsaw, Inst. Nucl. Studies) ; Efthymiopoulos, I. (CERN)
Publication	2014-01
Imprint	21 Jul 2013
Number of pages	25
Note	Comments: 14 pages, 9 figures, 11 tables 14 pages, 9 figures, 11 tables: updates to the paper structure, typos fixed in version 2
In:	Nucl. Phys. A 921 (2014) 60-84
DOI	10.1016/j.nuclphysa.2013.11.003
Subject category	Nuclear Physics - Experiment
Abstract	The cross sections of forward emission of one, two and three neutrons by 158A GeV 115In nuclei in collisions with Al, Cu, Sn and Pb targets are reported. The measurements were performed in the framework of the ALICE-LUMI experiment at the SPS facility at CERN. Various corrections accounting for the absorption of beam nuclei and produced neutrons in target material and surrounding air were introduced. The corrected cross section data are compared with the predictions of the RELDIS model for electromagnetic fragmentation of 115In in ultraperipheral collisions, as well as with the results of the abrasion-ablation model for neutron emission in hadronic interactions. The measured neutron emission cross sections well agree with the RELDIS results, with the exception of In-Al collisions where the measured cross sections are larger compared to RELDIS. This is attributed to a relatively large contribution of hadronic fragmentation of In on Al target with respect to electromagnetic fragmentation, on the contrary to similar measurements performed earlier with 30A GeV 208Pb colliding with Al.
Copyright/License	publication: © 2014-2025 CERN (License: CC-BY-4.0)

$Cross sections of emission of one (top panel) and two neutrons (bottom panel) by $^{115}$In as a result of absorption of a photon with energy $E$. Experimental data~\cite{Fultz:1969,Lepretre:1974,Bogdankevich:1962} and evaluated data~\cite{Varlamov:2010} all extracted from the EXFOR database~\cite{EXFOR} are shown by various symbols explained on the legends of the corresponding panels. Results of the RELDIS code are shown by open symbols connected by a solid line.$ $Experimental setup to study neutron emission in electromagnetic fragmentation of 158A~GeV $^{115}$In. S0, S1, SS, AC - scintillator detectors, VT - vacuum tubes.$