Emission patterns of neutral pions in 40A MeV Ta plus Au reactions

0356642 - ÚJF 2011 RIV US eng J - Článek v odborném periodiku
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
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: HEAVY-ION COLLISIONS * SEGMENTED ELECTROMAGNETIC CALORIMETER * NUCLEAR-MATTER
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 3.416, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0195116