Crossing the dripline to N-11 using elastic resonance scattering
Artikel i vetenskaplig tidskrift, 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

Författare

Karin Markenroth

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

Leif Axelsson

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

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, Institutionen för experimentell fysik, Subatomär fysik

K. M. Kallman

S. Leenhardt

M. Lewitowicz

T. Lonnroth

P. Manngard

I. Martel

A. C. Mueller

I. Mukha

Göran Hugo Nyman

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

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

Ämneskategorier

Subatomär fysik