Investigation Of Non-fluctuation On Emission Of Target Recoiled Protons In ²⁰Ne-Em Interactions At 400 A MeV

Using method of scaled factorial moment, the non-statisticalfluctuation of target recoil protons emitted from 400 A MeV²⁰Neinduced targets and heavy targets （AgBr） of nuclear emulsion isinvestigated. The multiplicity distribution and distributions ofemission angle and azimuthal angle are also studied in this paper.The non-statistical fluctuation of target recoiled protons emittedfrom 400 A MeV²⁰Ne induced emulsion targets is investigated firstly.The horizontal and vertical scaled factorial moments inone-dimensional emission angle space and azimuthal angle spaceincrease with the increase of partition number of phase space, whichis evidence of the non-statistical fluctuation. Considering theinfluence of the non-uniformity of particle density distribution, thecorrected horizontal and vertical scaled factorial moments decreasewith the increase of the partition of phase space, so there is noevidence of non-statistical fluctuation in the emission of targetrecoiled protons. In two-dimensional phase space （cosθ-ψspace） thehorizontal and vertical of the partition of phase space, which meansthat there is a non-statistical fluctuation in the emission of targetrecoiled protons. To eliminate the influence of the non-uniformity of particle density distribution, the cumulative variable is used tocalculate the scaled factorial moments in two-dimensional phasespace. It is found that the corrected horizontal scaled factorialmoment ln< Fq> （?） increase with the increase of the values of-lnδΧ_cosθΧ_ψ, it seems that there is a non-statistical fluctuation, andthe corrected vertical scaled factorial moment ln< Fq> corr Vdecreasewith the increase of the values of lnδΧ_cosθΧ_ψ, it means that there isno non-statistical fluctuation. Finally the horizontal and verticalscaled factorial moments of target recoiled protons produced in 400 AMeV²⁰Ne induced heavy target （AgBr） of emulsion in one- andtwo-dimensional phase space is studied, it is found that there is nonon-statistical fluctuation in the emission process of target recoiledprotons.From the investigation of the horizontal and vertical scaledfactorial moments in one- and two-dimensional phase space we canconclude that there is no non-statistical fluctuation in the emission oftarget recoiled protons produced in the interaction of²⁰Ne andemulsion targets at 400 A MeV.