Projectile fragmentation reactions and production of nuclei near the neutron drip line

Journal Article · Mon Oct 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.76.044605· OSTI ID:21067817

Notani, M; Teranishi, T ^[1]; Sakurai, H; Iwasaki, H ^[2]; Aoi, N; Fukuda, N; Liu, Z; Yoneda, K; Ogawa, H; Okuno, H; Yoshida, A; Watanabe, Y X; Inabe, N; Kubo, T; Ito, S; Ozawa, A; Suzuki, T; Tanihata, I; Ishihara, M ^[3]; Nakamura, T ^[4]

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1. Center for Nuclear Study, University of Tokyo (CNS) RIKEN Campus, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
2. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033 (Japan)
3. RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)
4. Department of Applied Physics, Tokyo Institute of Technology, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8551 (Japan)

The reaction mechanism of projectile fragmentation at intermediate energies has been investigated by observing the target dependence of the production cross sections of very neutron rich nuclei. Measurement of longitudinal momentum distributions of projectile-like fragments in a broad range of fragment mass and charge was performed using a 100 MeV/nucleon {sup 40}Ar beam incident on Be and Ta targets. By measurement of the fragment momentum distribution, a parabolic mass dependence of the momentum peak shift was observed in the results of both targets, and light-fragment acceleration was found only in the Be-target data. The analysis of production cross sections revealed an obvious enhancement of the target dependence except for a target size effect when the neutron excess is increased. This result implies the breakdown of factorization of production cross sections for very neutron rich nuclei near the drip line.

• OSTI ID: 21067817
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 4 Vol. 76; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 40 REACTIONS
BERYLLIUM 9 TARGET
CROSS SECTIONS
DISTRIBUTION
FACTORIZATION
LONGITUDINAL MOMENTUM
MEV RANGE
NEUTRON-RICH ISOTOPES
NEUTRONS
NUCLEAR FRAGMENTATION
NUCLEAR REACTION KINETICS
TANTALUM 181 TARGET