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Nuclear and electromagnetic fragmentation of 2.25-TeV197Au nuclei (1994)

He, Y. D. ; Price, P. B.

Springer

The European physical journal 348 (1994), S. 105-109

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ISSN: 1434-601X

Keywords: 25.70.Np

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract We report the first measurement of the total charge-loss cross section σtot=σem+σnuc and partial cross sections (for ΔZ=1, 2, ..., 9) of 11.4 A GeV197Au nuclei in various targets. The large Coulomb barrier for Au reduces the electromagnetic contribution σem in a Pb target to only 18% of σnuc, compared with ∼ 70% for 14.5 A GeV28Si and 120% for 200 A GeV32S. With σem taken to be ∝Z T 1.8 , σnuc can be fitted with σnuc=α(A P 1/3 +A T 1/3 −b)2, with b=0.83 and α=59 mb, essentially the same as found at energies of 1 to 2 A GeV. Electromagnetic partial cross sections for ΔZ=1 exceed ∼ 40 mb in the Pb, Sn, Cu, and Fe targets and are substantial for larger values ofΔZ in the heavier targets.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF01289597

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