title: Momentum distribution of 15B fragments from the breakup of 17B.
abstract: The two-neutron removal cross section (sigma(-2n)) and the longitudinal momentum distribution of 15B fragments from the breakup of 17B on 9Be were measured at 70A MeV. The distribution in the projectile rest frame is characterized by a FWHM of 80+/-10 MeV/c for 15B. The sigma(-2n) is found to be 0.22+/-0.05 b. A Glauber-type analysis of the data provides clear evidence of a two-neutron halo structure in 17B.
authors.affiliation: Department of Physics, Niigata University, Niigata 950-2181, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Suzuki
authors.forename: Y
authors.initials: Y
authors.lastname: Ogawa
authors.forename: M
authors.initials: M
authors.lastname: Chiba
authors.forename: M
authors.initials: M
authors.lastname: Fukuda
authors.forename: N
authors.initials: N
authors.lastname: Iwasa
authors.forename: T
authors.initials: T
authors.lastname: Izumikawa
authors.forename: R
authors.initials: R
authors.lastname: Kanungo
authors.forename: Y
authors.initials: Y
authors.lastname: Kawamura
authors.forename: A
authors.initials: A
authors.lastname: Ozawa
authors.forename: T
authors.initials: T
authors.lastname: Suda
authors.forename: I
authors.initials: I
authors.lastname: Tanihata
authors.forename: S
authors.initials: S
authors.lastname: Watanabe
authors.forename: T
authors.initials: T
authors.lastname: Yamaguchi
authors.forename: Y
authors.initials: Y
authors.lastname: Yamaguchi