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HK: Hadronen und Kerne
HK 52: Heavy Ion Reactions VI, Relativistic Energies
HK 52.3: Vortrag
Mittwoch, 18. März 1998, 14:30–14:45, F
Fragmentation of Instable Nuclei in the Mass Region A=100 ∗ — •R. Gernh"auser1, J. Friese1, H. Geissel2, J. Homolka1, A. Kastenm"uller1, P. Kienle1, H.-J. Körner1, M. M"unch1, R. Schneider1, A. Stolz1, K. S"ummerer2, and K. Zeitelhack1 — 1Physik-Dep. E12, TU-M"unchen, D–85748 Garching — 2GSI, Darmstadt
We studied projectile fragmentation of exotic secondary beams in the mass region 84 ≤ A ≤ 96 . The beams with an A/Q ratio far from stability were produced by fragmentation of 96Zr and 96Ru ions from the heavy ion synchrotron (SIS-GSI) with E = 1AGeV on a 4 g/cm2 Be target. At the central focal plane of the fragment separator (FRS) the secondary beam ions were fully identified with respect to mass number and nuclear charge. The essential velocity information was obtained by a new kind of Ring Imaging Cherenkov detector (RICH) [1]. The instable projectiles were then directed to a second 4 g/cm2 Be target. Identification of secondary fragments was performed by standard Δ E-TOF-Bρ measurement in the 2nd half of the FRS. We report on fragmentation cross sections for selected secondary isotopes and corresponding total reaction cross sections. A comparison of the results to the INC-model "‘ISAPACE"’ showes good agreement in a wide range of projectile isospins −8 ≤ Tz ≤ −2.
∗ supported by BMBF(06TM365) and GSI.
[1] R. Gernh"auser, et al., Nuc. Inst. Meth. A 371, 300-304 (1996 )