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FIZIKA B 11 (2002) 3, 141-148
 
INTERMITTENCY AND TARGET FRAGMENTS IN MUON-NUCLEUS INTERACTIONS AT (420±45) GeV
DIPAK GHOSH, ARGHA DEB, SYED IMTIAZ AHMED and
PARTHASARATHI GHOSH
Nuclear and Particle Physics Research Centre, Department of Physics,
Jadavpur University, Kolkata -700032, India
Received 30 January 2002; Accepted 16 December 2002
Online 7 February 2003
This paper presents an analysis of angular distribution of target fragments in lepton
nucleus interactions in terms of scaled factorial moments (SFMs) in one-dimensional space.
A power-law type behaviour of normalised scaled factorial moments, popularly known as
'intermittency', is expressed with a decreasing phase space. Our data of target fragments
reveal a similar type of increase in SFMs with decreasing bin width of the angular
distribution in muon-nucleus interactions at (420±45) GeV. The
new observation contradicts the existing concept of the evaporation model that the
statistical equilibrium is reached before the emission of fragmented particles from
residual target nuclei at high-energy nuclear interactions.
PACS numbers: 25.30.-c
UDC 539.126
Keywords: lepton-nucleus interactions, target fragments, angular distribution,
intermittency, scaled factorial moments
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