I. INTRODUCTION The study of bound and scattering states in few-nucleon systems gives valuable infor- mation regarding the underlying nuclear interaction. The fact that the spectrum of each hydrogen and helium isotope has only one bound state in the mass region A = 2 − 4, limits the applicability of bound state methods to a few states in the study of these nuclei. In Ref. [1] a detailed study of the three-nucleon bound states has been done, whereas a similar analysis in the case of $^{4}$He can be found in Refs. [2, 3]. In recent years much of the study of the three-nucleon system has been done in the three-nucleon continuum (see Refs. [4, 5] and references therein). Results in the four-body system have been obtained so far in the energy region below the three particle breakup [6, 7]. Well established methods for treating both, bound and scattering states, regard the solution of the Faddeev equations ( A = 3) or Faddeev-Yakubovsky equations ( A = 4) in configuration or momentum space and the Hyperspherical Harmonic (HH) expansion in conjunction with the Kohn Variational Principle (KVP). These methods have proven to be of great accuracy. They have been tested using different benchmarks [8, 9]. On the other hand, many other methods are presently used to describe bound states: for example the Green Function Montecarlo (GFMC) and No Core Shell Model (NCSM) methods have been used in nuclei up to A = 10 and A = 12 respectively [10, 11]. Attempts to use these methods for the description of scattering states have recently appeared [12, 13]. The possibility of employing bound state techniques for describing scattering states has always attracted particular attention [14]. Recently continuum-discretized states obtained from the stochastic variational method have also been used to study α + n scattering [15]. In those two approaches the tangent of the phase-shift results to be a quotient of two numbers. In the former the numerator and denominator are obtained from two integral relations after projecting the Schr¨ odinger equation, whereas in the latter the numerator results from an integral relation derived by means of the Green’s function formalism and the denominator from the normalization of the continuum-discretized state. Another problem that has received particular attention in few-nucleon scattering pro- cesses regards collisions between charged particles. Traditionally, the Faddeev method has been applied to the neutral n − d reaction. Applications to p − d zero energy scattering were studied in configuration space by the Los Alamos-Iowa group using s -wave potentials [16] 2