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Phys. Rev. C 70, 054320 (2004) [6 pages]

Density distribution of 17B from a reaction cross-section measurement

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Y. Yamaguchi1,2,*, C. Wu1,3, T. Suzuki2,†, A. Ozawa1,‡, D. Q. Fang1,4, M. Fukuda5, N. Iwasa6, T. Izumikawa2, H. Jeppesen1,7, R. Kanungo1, R. Koyama2, T. Ohnishi1, T. Ohtsubo2, W. Shinozaki2, T. Suda1, M. Takahashi2, and I. Tanihata1,§
1The Institute for Physical and Chemical Research (RIKEN), Saitama 351-0198, Japan
2Department of Physics, Niigata University, Niigata 950-2181, Japan
3School of Physics, Peking University, Beijing 100871, China
4Shanghai Institute of Nuclear Research, Chinese Academy of Sciences, Shanghai 201800, China
5Department of Physics, Osaka University, Osaka 560-0043, Japan
6Department of Physics, Tohoku University, Miyagi 980-8578, Japan
7Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark

Received 22 July 2004; published 24 November 2004

The reaction cross section (σR) for the neutron-rich nucleus 17B on a carbon target has been measured at an energy of 77A MeV by the transmission method. An enhancement of σR at intermediate energy compared to that at high energy was observed. The density distribution of 17B was deduced through the energy dependence of σR using a finite-range Glauber-type calculation under an optical-limit approximation as well as a few-body approach. The existence of a long neutron tail in 17B was demonstrated. The fraction of the wave function with the valence two-neutron configuration of (2s1∕2)J=02 or (1d5∕2)J=02 was found to be 50±10% based on a finite-range few-body Glauber-type calculation.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.70.054320
DOI:
10.1103/PhysRevC.70.054320
PACS:
21.10.Gv, 25.60.Dz, 27.20.+n

*Present address: Center for Nuclear Study (CNS), University of Tokyo RIKEN campus, Saitama 351-0198, Japan.

†Present address: Department of Physics, Saitama University, Saitama 338-8570, Japan.

‡Present address: Institute of Physics, University of Tsukuba, Ibaraki 305-8571, Japan.

§Present address: Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.

 
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