TEMPORAL AND THERMAL-PROPERTIES OF INTERMEDIATE-MASS FRAGMENTS FROM THE S-32+NI-58 REACTION AT 30 AMEV


TUTAY A. , BUDZANOWSKI A., FUCHS H., HOMEYER H., PAUSCH G., SCHWARZ C., ...Daha Fazla

ACTA PHYSICA POLONICA B, cilt.26, ss.1413-1422, 1995 (SCI İndekslerine Giren Dergi) identifier

  • Cilt numarası: 26 Konu: 8
  • Basım Tarihi: 1995
  • Dergi Adı: ACTA PHYSICA POLONICA B
  • Sayfa Sayıları: ss.1413-1422

Özet

Information on thermal and temporal aspects of intermediate-mass fragment (IMF) formation was obtained by studying correlations between (a) two IMFs, (b) one IMF and one a: particle, and (c) one heavy residue and one ct particle produced in collisions of 960 MeV S-32 projectiles with Ni-58. The fragments and/or light particles were detected in the ARGUS multidetector array at the VICKSI accelerator of the HMI Berlin. The relative-energy distributions are of Maxwellian shape yielding a temperature of 5 MeV for the heavy reaction products, but only of about 3 MeV for the primary IMFs. Thus IMFs seem to be emitted towards the end of the evaporation chain. The relative-velocity correlations between two IMFs (Li, Be, B, C) display longer emission times when one of the IMFs is a lighter one (Li, Be), compatible with the picture that the latter are more likely to result from a multi-step decay.