α-Particle Intermediate State in the (h,t) Reaction

Abstract

We report on preliminary calculations of the (h,t) reaction, assuming that the helion picks up a neutron, propagates some distance as an alpha, and then strips a proton. The following qualitative results are established:

• 1) The angular distribution to anti-analog states has an L=1 shape while the angular distribution to analog states retains its L=0 shape. This is due to the fact that the transition operator to the analog state,

  $${\rm < analog}\;{\rm |}\;{\rm a}_{\rm p} ^{\rm + } ({\rm r}_{\rm p} ){\rm a}_{\rm n} ({\rm r}_{\rm n} )\;|\;{\rm parent > }\;{\rm = }\;{\rm \theta }\;{\rm (r}_{\rm p} ,{\rm r}_{\rm n} )$$

  has an L=0 character when r_p=r_n, while for the anti-analog state the operator is very small when r_p=r_n and has an L=1 character when r_p is near r_n.