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Emission patterns of neutral pions in 40A MeV Ta plus Au reactions
- 1.0356642 - ÚJF 2011 RIV US eng J - Journal Article
Piasecki, K. - Matulewicz, T. - Yahlali, N. - Delagrange, H. - Díaz, J. - d'Enterria, D.G. - Fernández, F. - Kugler, Andrej - Lohner, H. - Martinez-Garcia, G. - Ostendorf, R. W. - Schutz, Y. - Tlustý, Pavel - Turrisi, R. - Wagner, Vladimír - Wilschut, H. W.
Emission patterns of neutral pions in 40A MeV Ta plus Au reactions.
Physical Review. C. Roč. 81, č. 5 (2010), 054912/1-054912/7. ISSN 0556-2813
Institutional research plan: CEZ:AV0Z10480505
Keywords : HEAVY-ION COLLISIONS * SEGMENTED ELECTROMAGNETIC CALORIMETER * NUCLEAR-MATTER
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 3.416, year: 2010
Differential cross sections of neutral pions emitted in Ta-181+Au-197 collisions at a beam energy of 39.5A Me V have been measured with the two-arm photon spectrometer (TAPS). The kinetic energy and transverse momentum spectra of neutral pions cannot be properly described in the framework of the thermal model, nor when the reabsorption of pions is accounted for in a phenomenological model. However, high energy and high momentum tails of the pion spectra can be well fitted through thermal distributions with unexpectedly soft temperature parameters below 10 MeV.
Permanent Link: http://hdl.handle.net/11104/0195116
Number of the records: 1