title: Halo nucleus 11Be: a spectroscopic study via neutron transfer.
abstract: The best examples of halo nuclei, exotic systems with a diffuse nuclear cloud surrounding a tightly bound core, are found in the light, neutron-rich region, where the halo neutrons experience only weak binding and a weak, or no, potential barrier. Modern direct-reaction measurement techniques provide powerful probes of the structure of exotic nuclei. Despite more than four decades of these studies on the benchmark one-neutron halo nucleus 11Be, the spectroscopic factors for the two bound states remain poorly constrained. In the present work, the 10Be(d,​p) reaction has been used in inverse kinematics at four beam energies to study the structure of 11Be. The spectroscopic factors extracted using the adiabatic model were found to be consistent across the four measurements and were largely insensitive to the optical potential used. The extracted spectroscopic factor for a neutron in an nℓj=2s(1/2) state coupled to the ground state of 10Be is 0.71(5). For the first excited state at 0.32 MeV, a spectroscopic factor of 0.62(4) is found for the halo neutron in a 1p(1/2) state.
authors.affiliation: Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.
authors.forename: K T
authors.initials: KT
authors.lastname: Schmitt
authors.forename: K L
authors.initials: KL
authors.lastname: Jones
authors.forename: A
authors.initials: A
authors.lastname: Bey
authors.forename: S H
authors.initials: SH
authors.lastname: Ahn
authors.forename: D W
authors.initials: DW
authors.lastname: Bardayan
authors.forename: J C
authors.initials: JC
authors.lastname: Blackmon
authors.forename: S M
authors.initials: SM
authors.lastname: Brown
authors.forename: K Y
authors.initials: KY
authors.lastname: Chae
authors.forename: K A
authors.initials: KA
authors.lastname: Chipps
authors.forename: J A
authors.initials: JA
authors.lastname: Cizewski
authors.forename: K I
authors.initials: KI
authors.lastname: Hahn
authors.forename: J J
authors.initials: JJ
authors.lastname: Kolata
authors.forename: R L
authors.initials: RL
authors.lastname: Kozub
authors.forename: J F
authors.initials: JF
authors.lastname: Liang
authors.forename: C
authors.initials: C
authors.lastname: Matei
authors.forename: M
authors.initials: M
authors.lastname: Matoš
authors.forename: D
authors.initials: D
authors.lastname: Matyas
authors.forename: B
authors.initials: B
authors.lastname: Moazen
authors.forename: C
authors.initials: C
authors.lastname: Nesaraja
authors.forename: F M
authors.initials: FM
authors.lastname: Nunes
authors.forename: P D
authors.initials: PD
authors.lastname: O'Malley
authors.forename: S D
authors.initials: SD
authors.lastname: Pain
authors.forename: W A
authors.initials: WA
authors.lastname: Peters
authors.forename: S T
authors.initials: ST
authors.lastname: Pittman
authors.forename: A
authors.initials: A
authors.lastname: Roberts
authors.forename: D
authors.initials: D
authors.lastname: Shapira
authors.forename: J F
authors.initials: JF
authors.lastname: Shriner
authors.forename: M S
authors.initials: MS
authors.lastname: Smith
authors.forename: I
authors.initials: I
authors.lastname: Spassova
authors.forename: D W
authors.initials: DW
authors.lastname: Stracener
authors.forename: A N
authors.initials: AN
authors.lastname: Villano
authors.forename: G L
authors.initials: GL
authors.lastname: Wilson