Fragmentation of relativistic oxygen nuclei in interactions with a proton

Abstract

The data on investigation of inelastic interactions of 16 O nuclei in a hydrogen bubble chamber at an incident momentum of 3.25 A GeV/c are presented. Separate characteristics as fragments isotope composition and topological cross-sections of fragmentation channels are given. The processes of formation of light fragments and unstable nuclei, and the break-up of the 16 O nucleus into multicharge fragments are investigated. A comparison between the experimental data and the calculations of the cascade fragmentation evaporation model (CFEM) is made. The observed singularities of the interactions point out the important role of the nucleus α-cluster structure in the formation of the final products. PACS. 25.10.+s Nuclear reactions involving few-nucleon systems

Proton-proton correlations in dp and 16Op interactions

“…1. In the case of 16 Op interaction the experimental procedure is described in [10][11][12][13][14]. The data summary tape contains 11 019 events.…”

“…The average relative error of the proton momenta does not exceed 3.4% for tracks with length L > 35 cm. In this case with additional momentum cuts also fragments with Z ≤ 4 can be well separated by mass number [10][11][12][13][14].…”

Clustering in light nuclei in fragmentation above 1 A GeV

“…The relativistic 9 Be nucleus fragmentation is an attractive source for 8 Be generation due to the absence of a combinatorial background. The 8 Be nucleus reveals itself in the formation of α-particle pairs having an extremely small opening angle of the order of a few 10 −3 rad in the range of a few GeV.…”

“…The 8 Be nucleus reveals itself in the formation of α-particle pairs having an extremely small opening angle of the order of a few 10 −3 rad in the range of a few GeV. The estimation of the 8 Be production probability will make it possible to clear up the interrelation between n-8 Be and α-n-α excitation modes which are important in understanding the 9 Be structure and fragmentation of heavier nuclei.…”

“…Experimental data on the charged topology for the final states of a number of light nuclei have been described in [2,3,4,5,6]. More specific studies were performed for the leading channels like 12 C → 3α [7], 16 O → 4α [8,9], 6 Li → dα [10,11], 7 Li → tα [12], 10 B → dαα [13], and 7 Be → 3 Heα [14]. A collection of appropriate reaction images can be found in [15,16].…”