Bochum 1998 – wissenschaftliches Programm

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HK: Hadronen und Kerne

HK 8: Nuclear Forces I, Few Nucleon Systems

HK 8.6: Vortrag

Montag, 16. März 1998, 15:30–15:45, F

Elastic 2n-transfer in the α(⁶He,⁶He)α reaction — •R. Raabe¹, A. Andreyev¹, D. Baye², W. Bradfield-Smith³, S. Cherubini⁴, T. Davinson³, P. Descouvemont², A. Di Pietro³, W. Galster⁴, M. Huyse¹, A.M. Laird³, J. McKenzie³, W.F. Mueller¹, A. Ostrowski³, A. Piechaczek⁵, A. Shotter³, P. Van Duppen¹, W. von Oertzen⁶, A. Woehr¹, and V. Zhukov⁷ — ¹IKS, KU Leuven — ²ULB, Brussel — ³University Of Edinburgh — ⁴UCL, Louvain-la-Neuve — ⁵Lousiana State University — ⁶HMI, Berlin — ⁷Kurtchatov Institute, Moscow

We performed an experiment at CYCLONE in Louvain-la-Neuve to search for elastic transfer of the 2n-cluster in the elastic scattering of ⁶He on ⁴He in inverse kinematics. A gas target of 1 cm thickness containing ⁴He at 500 mbar pressure was bombarded by a 40-MeV ⁶He⁺⁺ beam of 10⁵ pps. The reaction products were registered in several arrays of Segmented Silicon Strip Detectors covering the laboratory angles between 23 and 70 degrees and between 6 and 15 degrees. The α(⁶He,⁶He)α elastic cross section was extracted in the angular range between 60 and 127 degrees in the center of mass from coincidence events. These data are now analyzed using the double folding potential suggested by Baye [1], based on a microscopical three-cluster model which is used to calculate the matter distribution of ⁶He. Preliminary results show that such a model can successfully reproduce the data.

[1] D. Baye, L. Desorgher, D. Guillain, and D. Herschkowitz, Phys. Rev. C 54, 2563 (1996)