W.N. Catford, R.C. lemmon et al.,
EUROPEAN PHYSICAL JOURNAL
A 25: 245-250 Suppl. 1, 2005
Results from a
study in inverse kinematics of the Ne-24(d, p gamma)Ne-25 reaction, using a
radioactive beam of Ne-24 from the SPIRAL facility at GANIL, are reported.
First, a brief overview is given of several methods using radioactive beams to
study the classic single-nucleon transfer reactions such as (d, p) or (d,
t)/(d, He-3), where the experimental design is strongly influenced by the
extreme inverse kinematics. A promising approach to deliver good energy
resolution is to combine a high geometrical efficiency for kinematically
complete charged particle detection with a high efficiency array for gamma-ray
detection. One of the first dedicated set-ups for this type of experiment is
the TIARA silicon strip array combined with the EXOGAM segmented germanium
array. Together they comprise a highly compact, position-sensitive particle
array with 90% of 4 pi coverage, mounted inside a cubic arrangement of four
segmented gamma-ray detectors in very close geometry with 67% of 47 active
coverage. Using this setup, the structure of Ne-25 has been studied via the (d,
p) reaction. A pure ISOL beam of 10(5) s(-1) of Ne-24 at 10 MeV/A was provided
by SPIRAL and bombarded a CD2 target of 1 mg/cm(2). The Ne-25 was detected at
the focal plane of the VAMOS spectrometer where the direct beam was separated
and intercepted. Reaction protons were detected in coincidence with little
background. Four resolved peaks were recorded between E-x = 0 and 4 MeV. The
data confirm and extend the results from a multinucleon transfer study using
the (C-13,O-14) reaction. Further information has been obtained using the
energies of coincident gamma-rays. The reactions Ne-24(d, d gamma)Ne-24,
Ne-24(d, t)Ne-23 and Ne-24(d, He-3)F-23 were recorded simultaneously and
analysis of these is also underway.