Quantum suppression of fluctuations and temperatures of reconstructedA∼ 30 quasi-projectiles
| Autor: | R.M. Tripathi, G. A. Souliotis, Brian Stein, A J Echeverria, Zachary Kohley, Alan McIntosh, Aldo Bonasera, S. N. Soisson, Lauren Heilborn, Paola Marini, A.L. Keksis, C. Richers, L. W. May, P. Cammarata, D. V. Shetty, J. Mabiala, S. Wuenschel, Hua Zheng, Sherry Yennello |
|---|---|
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Journal of Physics G: Nuclear and Particle Physics. 41:025108 |
| ISSN: | 1361-6471 0954-3899 |
| DOI: | 10.1088/0954-3899/41/2/025108 |
| Popis: | Suppression of multiplicity fluctuations has been observed for three light fermions (protons, tritons and 3He) in the multifragmentation of reconstructed hot quasi-projectiles produced in collisions of 32S (45 MeV/nucleon) with 112Sn. This suppression, predicted by recent calculations, is attributed to Pauli blocking and has also been observed in experiments with trapped Fermi gases. Experimental results on nuclear temperature and density employing a quantal approach based on momentum and multiplicity fluctuations are also presented. The extracted temperatures show a noticeable reduction when compared to a similarly derived classical method. This reduction in temperature is in agreement with previous predictions indicating that classically derived methods overpredict nuclear temperature as they do not take into account the Fermi motion of the nucleons. The present results underline the role of quantum statistics in nuclear disassembly and suggest the need for proper quantum treatment when dealing with the thermodynamic properties of fragmenting heavy ions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|