(T,HE-3) REACTION - NEW TOOL FOR STUDYING SPIN-ISOSPIN EXCITATIONS INNEUTRON-RICH NUCLEI

Citation
I. Daito et al., (T,HE-3) REACTION - NEW TOOL FOR STUDYING SPIN-ISOSPIN EXCITATIONS INNEUTRON-RICH NUCLEI, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 397(2-3), 1997, pp. 465-471
Citations number
44
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
ISSN journal
01689002
Volume
397
Issue
2-3
Year of publication
1997
Pages
465 - 471
Database
ISI
SICI code
0168-9002(1997)397:2-3<465:(R-NTF>2.0.ZU;2-O
Abstract
Initial experiments were carried out to study spin-isospin transitions in nuclei using (t,He-3) measurements. A triton beam was produced fro m the breakup reaction (He-4,t-p) on a 9.25 g/cm(2) Be production targ et using a He-4 beam of 620 MeV. With a beam of 70 enA a yield of 381 MeV tritons with 4.5 x 10(6) particles/s was achieved. The first half of the A1200 beam transport system at NSCL was used to analyze the tri ton beam. The energy spread at the target position was estimated to be about 23 MeV. The second half of the A1200 was used to analyze the en ergy of He-3 particles from the (t,He-3) reaction. The dispersion matc hing method was applied to obtain good energy resolution despite the s ignificant energy spread of the incident tritons. The achromatic prope rties of the A1200 system made it possible to obtain high-resolution ( t,He-3) spectra at theta = 0 degrees with a resolution of Delta E/E = 0.002 (Delta E = 780 keV).