Crossing the dripline to N-11 using elastic resonance scattering
Journal article, 2000

The level structure of the unbound nucleus N-11 has been studied by C-10+p elastic resonance scattering in inverse geometry with the LISE3 spectrometer at GANIL, using a C-10 beam with an energy of 9.0 MeV/ nucleon. An additional measurement was done at the A1200 spectrometer at MSU. The excitation function above the C-10+p threshold has been determined up to 5 MeV. A potential-model analysis revealed three resonance states at energies 1.27(-0.05)(+0.18) MeV (Gamma = 1.44 +/- 0.2 MeV), 2.01(-0.05)(+0.15) MeV (Gamma = 0.84 +/- 0.2 MeV), and 3.75 +/- 0.05 MeV (Gamma = 0.60 +/- 0.05 MeV) with the spin-parity assignments I-pi=1/2+,1/2,-,5/2+, respectively. Hence, N-11 is shown to have a ground state parity inversion completely analogous to its mirror partner Be-11. A narrow resonance in the excitation function at 4.33 +/- 0.05 MeV was also observed and assigned spin parity 3/2-.

widths

light-nuclei

li-11

low-lying levels

spectroscopy

be-11

one-neutron halo

alpha-cluster states

unbound nucleus n-11

energies

Author

Karin Markenroth

Chalmers, Department of Experimental Physics, Subatomic Physics

Leif Axelsson

Chalmers, Department of Experimental Physics, Subatomic Physics

S. Baxter

M. J. G. Borge

C. Donzaud

S. Fayans

H. O. U. Fynbo

V. Z. Goldberg

S. Grevy

D. Guillemaud-Mueller

Björn Jonson

Chalmers, Department of Experimental Physics, Subatomic Physics

K. M. Kallman

S. Leenhardt

M. Lewitowicz

T. Lonnroth

P. Manngard

I. Martel

A. C. Mueller

I. Mukha

Thomas Nilsson

Göran Hugo Nyman

Chalmers, Department of Experimental Physics, Subatomic Physics

N. A. Orr

K. Riisager

G. V. Rogachev

M. G. Saint-Laurent

I. N. Serikov

N. B. Shul'gina

O. Sorlin

M. Steiner

O. Tengblad

M. Thoennessen

E. Tryggestad

W. H. Trzaska

Fredrik Wenander

J. S. Winfield

R. Wolski

Physical Review C - Nuclear Physics

0556-2813 (ISSN) 1089-490X (eISSN)

Vol. 6203 3

Subject Categories

Subatomic Physics

More information

Created

10/7/2017