Spallation of¹⁹⁷Au with 4.4-GeV deuterons

Abstract

Abstract. A comprehensive set of 110 radioactive nuclide cross sections with mass numbers 22 ≤ A ≤ 198 amu in the interaction of 4.4-GeV deuterons with 197 Au have been measured for the first time. The results including charge distributions have been parameterized in term of a 3-parameter equation in order to reproduces the isobaric distributions. Using data from the charge distributions, the total mass-yield distribution was obtained. The new experimental data of the recoil properties of reaction products were also obtained. Kinematical characteristics of the reaction products obtained from measurements of the residuals emitted in the forward and backward directions exhibit different behavior depending on the mass region. The kinematical features of reaction products have been analyzed on the basis of the two-step model of high-energy nuclear reactions and discussed in terms of the different reaction mechanisms.

Estudo de fissão e espalação em núcleos actinídeos e pré-actinídeos a energias intermediárias

“…Como consequência da lei da termodinâmica a derivada de S A pode ser expressada como função da temperatura, 25) onde T A (E) é a temperatura à qual a energia mais provável de um corpo A é igual a E em equilíbrio termodinâmico. A temperatura T tem unidades de energia a qual é igual à temperatura ordinária vezes a constante de Boltzman k B , que no caso de física de partículas ou nuclear tomamos como a unidade.…”