Exclusive and Restricted-Inclusive Reactions Involving the Be-11 One-Neutron Halo
Artikel i vetenskaplig tidskrift, 1994

Reactions of a 41 MeV/u beam of the radioactive halo nucleus Be-11 have been studied with a counter telescope coupled to an array of neutron detectors covering angles up to 97-degrees. The technique allows to determine single-neutron inclusive and exclusive angular distributions. The targets (Be, Ti and Au) were chosen to illustrate the relative roles played by nuclear and Coulomb mechanisms. The channels leading to Be-10, the dissociation channels, correspond to impact parameters larger than the sum of the radii of the target and the Be-10 core. It is shown that for the dissociation process it is possible to account almost quantitatively for the integral, single- and double-differential cross sections from models without free parameters including the Coulomb, Serber and Glauber (diffraction-dissociation) mechanisms. The neutron distributions from the nondissociative reaction channels show little individuality and it is convenient to group them together as the channel ''neutron plus anything different from Be-10''. We refer to these as ''restricted-inclusive'' reactions. These seem to be a promising tool for obtaining accurate information on the halo wave function in momentum coordinates.

X)

RICH NUCLEI

BE-9

ANALYSIS IN TERMS OF COULOMB

BREAK-UP

INTEGRAL SIGMA(BE-10) FOLLOWING

EXCITATION

DISSOCIATION CROSS-SECTION

TI

DOUBLE-DIFFERENTIAL

HEAVY-IONS

PROJECTILE FRAGMENTATION

LI-11 PROJECTILES

DIFFRACTIVE MECHANISMS

E(N)) NEAR 0-DEGREES

E=41 MEV/NUCLEON

EXCLUSIVE SIGMA(UPSILON(N)) UP TO 97-DEGREES

SIGMA(UPSILON

SERBER AND

AU-197 (BE-11

COULOMB DISSOCIATION

ASTROPHYSICAL INTEREST

PROJECTILE BREAKUP

MEASURED INCLUSIVE

LIGHT-NUCLEI

Författare

R. Anne

R. Bimbot

S. Dogny

H. Emling

D. Guillemaudmueller

P. G. Hansen

P. Hornshoj

F. Humbert

Björn Jonson

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

M. Keim

M. Lewitowicz

P. Moller

A. C. Mueller

R. Neugart

Thomas Nilsson

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

Göran Hugo Nyman

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

F. Pougheon

K. Riisager

M. G. Saintlaurent

G. Schrieder

O. Sorlin

Olof Tengblad

Katarina Wilhelmsen Rolander

Chalmers, Institutionen för experimentell fysik, Subatomär fysik

Nuclear Physics A

0375-9474 (ISSN)

Vol. 575 125-154

Ämneskategorier

Subatomär fysik

DOI

10.1016/0375-9474(94)90142-2