Summary
The emission of hard photons and pre-equilibrium protons has been investigated in exclusive experiments performed with MEDEA detector. The observation of the γ-proton anticorrelation indicates that the dominant production mechanism is the first-chance neutron-proton (np) collisions. The anisotropic angular distributions point out the presence of screening effects and are reminiscent of the free np scattering thus giving information of the space-time origin of the energetic protons. Protons, with energy more than twice the kinematical limit for nucleon-nucleon (NN) collisions, have been observed in several reactions around the Fermi energy.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Cassing C., Metag V., Mosel U. andNiita K.,Phys. Rep.,160 (1988) 189.
Migneco E., Agodi C., Alba R., Bellia G., Coniglione R., Del Zoppo A., Finocchiaro P., Maiolino C., Piattelli P., Raia G. andSapienza P.,Nucl. Instrum. Methods A,314 (1992) 31.
Cavata C., Demoulins M., Gosset J., Lemaire M. C., L’Hote D., Poiton J. andValette O.,Phys. Rev. C,42 (1990) 1760.
Iori I., Manduci L., Moroni A., Scardaoni R., Sun ChongWen, Zhang Yuzhao, Zhang Guangming, Giglio F., Mora E., Di Pietro G., Dellera L., Cortesi A., Bassini R., Boiano C., Brambilla S., Malatesta M., Bruno M., D’Agostino M., Fiandri M. L., Fuschini E., Milazzo P. M., Busacchi G., Cunsolo A., Foti A., Gianino C., Sava G., Gramegna F., Buttazzo P., Margagliotti G. V., Vannini G., Auger G. andPlagnol E.,Nucl. Instrum. Methods A,325 (1993) 458.
Nifenecker H. andPinston J. A.,Annu. Rev. Nucl. Part. Sci.,40 (1990) 113.
Migneco E., Agodi C., Alba R., Bellia G., Coniglione R., Del Zoppo A., Finocchiaro P., Maiolino C., Piattelli P., Russo G., Sapienza P., Badala A., Barbera R., Palmeri A., Pappalardo G. S., Riggi F., Russo A. C., Peghaire A. andBonasera A.,Phys. Lett. B,298 (1993) 46.
Fucks H. andMohring K.,Rep. Prog. Phys.,57 (1994) 231.
Alba R., Coniglione R., Del Zoppo A., Agodi C., Bellia G., Finocchiaro P., Loukachine K., Maiolino C., Migneco E., Piattelli P., Santonocito D., Sapienza P., Peghaire A., Iori I., Manduci L. andMoroni A.,Phys. Lett. B,322 (1994) 38.
Sapienza P., Coniglione R., Alba R., Del Zoppo A., Migneco E., Agodi C., Bellia G., Finocchiaro P., Loukachine K., Maiolino C., Peghaire A., Piattelli P. andSantonocito D.,Phys. Rev. Lett.,73 (1994) 1769.
Nifenecker H., Blachot J., Crancon J., Gizon A. andLlers A.,Nucl. Phys. A,447 (1985) 533c.
Nifenecker H. andBondorf J.,Nucl. Phys. A,442 (1985) 478.
Guarnera A., Ph. D. thesis, Caen (1996).
Piattelli P.,Santonocito D.,Blumenfeld Y.,Suomijarvi T.,Agodi C.,Alamanos N.,Alba R.,Auger F.,Bellia G.,Chomaz Ph.,Colonna M.,Coniglione R.,Del Zoppo A.,Finocchiaro P.,Frascaria N.,Gillibert A.,Le Faou G. H.,Loukachine K.,Maiolino C.,Migneco E.,Roynette J. C.,Sapienza P. andScarpaci J. A., submitted to Phys. Lett. B.
Bonasera A., Gulminelli F. andMolitoris J.,Phys. Rep.,243 (1994) 1.
Northcliffe L. C., Mahavir Jain, Evans M. L., Glass G., Hiebert J. C., Kenefick R. A., Bonner B. E., Simmons J. E., Bjork C. W. andRiley P. J.,Phys. Rev. C,47 (1993) 36.
Bobeldijk I., Blok H. P., van den Brink H. B., Dodge G. E., Hesselink W. H. A., Jans E., Kasdorp W-J., Lapikas L., van Leeuwe J. J., Marchand C., Onderwater G., Pellegrino A., van Sambeek M., Spaltro C. M., van der Steenhoven G., Steijer J. J. M., Templon J. A., van Uden M. A., de Vries R. andde Witt Huberts P. K. A.,Phys. Lett. B,353 (1995) 32.
Shyam R. andKnoll J.,Nucl. Phys. A,448 (1986) 322.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Sapienza, P., Coniglione, R., Migneco, E. et al. Hard photons and energetic protons as probes of the nuclear dynamics at intermediate energy. Il Nuovo Cimento A (1971-1996) 111, 999–1008 (1998). https://doi.org/10.1007/BF03035987
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF03035987