Multifragmentation of the remnant produced in the reaction of 1A GeV gold with carbon

Journal Article · Sun Feb 01 00:00:00 EST 1998 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.57.764· OSTI ID:574009

Hauger, J A; Warren, P; Choi, Y; Elliott, J B; Gilkes, M L; Hirsch, A S; Hjort, E L; Porile, N T; Scharenberg, R P; Srivastava, B K; Tincknell, M ^[1]; Albergo, S; Caccia, Z; Costa, S; Insolia, A; Potenza, R; Romanski, J; Russo, G V; Tuve, C ^[2]; Brady, F P ; Cebra, D A; Chance, J L; Kintner, J C; Partlan, M D; Romero, J L ^[3]; Lindenstruth, V; Mueller, W F; Sann, H ^[4]; Justice, M; Keane, D; Scott, A; Shao, Y; Wang, S ^[5]; Bieser, F; Lisa, M A; Matis, H S; McMahan, M; McParland, C; Olson, D L; Rai, G; Rasmussen, J; Ritter, H G; Symons, T J; Wieman, H H; Wienold, T ^[6]; Chacon, A D; Wolf, a K ^[7]

---

1. Purdue University, West Lafayette, Indiana 47907 (United States)
2. Universita di Catania and Istituto Nazionale di Fisica Nucleare-Sezione di Catania, I-95129 Catania (Italy)
3. University of California, Davis, California 95616 (United States)
4. GSI, D-64220 Darmstadt (Germany)
5. Kent State University, Kent, Ohio 44242 (United States)
6. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
7. Texas AM University, College Station, Texas 77843 (United States)

A high-statistics exclusive study of the multifragmentation of 1A GeV gold on carbon has been performed. Particles with Z{le}2 show evidence of emission in a first prompt stage as well as in a second equilibrium stage whereas fragments with Z{ge}3 appear to be emitted essentially only in the second stage. Two methods for the separation of the Z{le}2 particles into the two stages are given and they are in agreement. The yields for each stage are determined as a function of the event charged particle multiplicity m. The mass, nuclear charge, excitation energy per nucleon, and temperature of the remnant left after the first stage and their fluctuations have been determined as a function of m. The expansion of the remnant to fragment freeze-out is examined. The freeze-out temperature is determined from double isotope ratios as a function of m and isentropic trajectories are obtained in the temperature-density plane. The caloric curve shows a monotonic increase with excitation energy. Some of the energy is in the form of radial flow. Overall, the results are consistent with a previous statistical analysis of the data which suggests that, over a certain range of excitation energies, multifragmentation involves a continuous phase transition. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 574009
• Journal Information: Physical Review, C, Vol. 57, Issue 2; Other Information: PBD: Feb 1998
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
NUCLEAR FRAGMENTATION
ATOMIC NUMBER
CARBON
GOLD
HEAVY ION REACTIONS
CHARGED PARTICLES
MULTIPLICITY
MASS
EXCITATION
FLUCTUATIONS
FREEZING OUT
ISOTOPES
PHASE TRANSFORMATIONS
ENERGY SPECTRA
STATISTICAL MODELS