Precise determination of tritonD-state parameters using transfer reactions at sub-Coulomb energies

Determination of the asymptoticD- toS-state ratio of the triton from sub-Coulomb (d→,t) reactions

“…[5] was made by using a shorter coincidence resolving time (50 ns as opposed to 500 ns) to produce cleaner charged-particle spectra. Also fast (( 0.5 s) spin-state switches between states 2, 3 and the unpolarized state were carried out under computer control in contrast to the manual changes made previously at intervals of about 45 min.…”

“…To obtain experimental values of the tensor analyzing The analysis of (d, t) reactions on medinm-weight and heavy nuclei using exact, finite-range DWBA calculations has been described previously [5,17]. Since DWBA theory is utilized to determine gz, it is important to maintain certain conditions to maximize the reliability of the theory.…”

“…Some minor improvements of experimental techniques over those used in Ref. [5] provided cleaner spectra, reducing the uncertainty in the experi- decades. Analyses of low-energy n-p scattering experiments reveal that the tensor force accounts for 70% of the binding interaction in the deuteron [6].…”

“…Since the percentage D state is not a physical observable, an accurate gq deterxnination is an important measure of the D-state amplitude and a test of calculations of few-nucleon systexns using "realistic" two-body and three-body forces [2 -4]. A determination of gq using transfer reactions at sub-Coulomb energies has been made by this group previously [5]. Angular distributions of the TAP's A"and A» for three different targets and four incident energies were analyzed using a finite-range distorted-wave Born approximation (DWBA) analysis.…”

“…A more recent attempt at establishing a precise value of re was made by Das et al [5]. Angular distributions 0f Az~and A&"were measured in the Mo, Sn, and i4sSm (d, t) reactions for deuteron energies below the Coulomb barrier.…”