Multifragmentation threshold in 93 Nb + nat Mg collisions at 30 MeV/nucleon
We analyzed the $^{93}Nb$ on $^{nat}Mg$ reaction at $30$ MeV/nucleon in the aim of disentangling binary sequential decay and multifragmentation decay close to the energy threshold, i.e. $\simeq 3$ MeV/nucleon. Using the backtracing technique applied to the statistical models GEMINI and SMM we reconstruct simulated charge, mass and excitation energy distributions and compare them to the experimental ones. We show that data are better described by SMM than by GEMINI in agreement with the fact that multifragmentation is responsible for fragment production at excitation energies around $3$ MeV/nucleon.
Emission of complex fragments from highly excited systems produced in 93 Nb+ 9 Be and 27 Al reactions at {E}/{A} = 25.4 and 30.3 MeV
Abstract Complex fragments with atomic numbers intermediate between that of the target and projectile have been detected in the reverse-kinematics reactions of 93 Nb plus 9 Be and 27 Al at bombarding energies of E A = 25.4 and 30.3 MeV. Experimental results from inclusive and coincidence measurements are presented and are used to characterize these fragments as the statistical, binary-decay products of highly excited compound nuclei formed in fusion-like reactions.
Tourism in the Amazon: identifying challenges and finding solutions
Purpose – The purpose of this paper is to provide an overview of the tourism sector in the Amazon regions of Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, and Suriname and then discuss the manner in which tourism activity assists the protection of the Amazon rainforests. The paper also describes the manner in which the first World Hospitality and Tourism Themes Roundtable on Tourism in the Amazon is organized in 2009.Design/methodology/approach – Teams of researchers from the Ministries of Tourism, the private sector and academia in the Member Countries of Treaty for Amazon Cooperation collaborated to address, in ten‐page papers, the question “Does sustainable tourism offer solutions for the protection of the Amazon rainforest?”Findings – The paper provides valuable information on the current state of tourism policy and practice in the Amazon Member Countries. It also articulates the challenges that attend the development of sustainable tourism as a mechanism for the protection of the Amazon.Practical...