Fragmentation of Necklike Structures

C. P. Montoya; W. G. Lynch; D. R. Bowman; G. F. Peaslee; N. Carlin; R. T. de Souza; C. K. Gelbke; W. G. Gong; Y. D. Kim; M. A. Lisa; L. Phair; M. B. Tsang; J. B. Webster; C. Williams; N. Colonna; K. Hanold; M. A. McMahan; G. J. Wozniak; L. G. Moretto

doi:10.1103/PhysRevLett.73.3070

Fragmentation of Necklike Structures

C. P. Montoya, W. G. Lynch, D. R. Bowman, G. F. Peaslee, N. Carlin, R. T. de Souza, C. K. Gelbke, W. G. Gong, Y. D. Kim, M. A. Lisa, L. Phair, M. B. Tsang, J. B. Webster, C. Williams, N. Colonna, K. Hanold, M. A. McMahan, G. J. Wozniak, and L. G. Moretto

Phys. Rev. Lett. 73, 3070 – Published 5 December 1994

Abstract

Intermediate mass fragment (IMF: $3 \leq Z \leq 20$ emission from necklike structures joining projectilelike and targetlike residues has been observed for peripheral ${}^{129}{Xe}$ + ${}^{nat}{Cu}$ collisions at $\frac{E}{A} = 50$ MeV. These fragments are emitted primarily at velocities between those of the projectilelike and targetlike residues. Relative to the charge distribution of fragments evaporated from projectilelike residues, the distribution for "neck" emission shows an enhanced emission for fragments with $4 \leq Z_{IMF} \leq 12$ . This feature is consistent with expectations for the fragmentation of a noncompact cylindrical configuration.

Received 1 July 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.3070

Authors & Affiliations

C. P. Montoya, W. G. Lynch, D. R. Bowman^*, G. F. Peaslee^†, N. Carlin^‡, R. T. de Souza^§, C. K. Gelbke, W. G. Gong^∥, Y. D. Kim^¶, M. A. Lisa^∥, L. Phair^∥, M. B. Tsang, J. B. Webster, and C. Williams

National Superconducting Cyclotron Laboratory and Department of Physics & Astronomy, Michigan State University, East Lansing, Michigan 48824

N. Colonna^**, K. Hanold, M. A. McMahan, G. J. Wozniak, and L. G. Moretto

Nuclear Science Division and Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory, Berkeley, California 94720

^*Present address: Chalk River Laboratories, Chalk River, Ontario, Canada K0J 1J0.
^†Present address: Physics Department, Hope College, Holland, MI 49423.
^‡Present address: Instituto de Fisica, Universidade de Sao Paulo, C. Postal 20516, CEP 01452-990, Sao Paulo, Brazil.
^§Present address: Department of Chemistry and Indiana University Cyclotron Facility, Bloomington, IN 47405.
^∥Present address: Lawrence Berkeley Laboratory, Berkeley, CA 94720.
^¶Present address: National Laboratory for High Energy Physics, 1-1 Oho, Tsukuba, Ibaraki 305, Japan.
^**Present address: INFN-Sez. di Bari, 70126 Bari, Italy.