Thermal Radiative Capture Research Articles

Nucleon isobars in nuclear structure

The example quoted previously was that of the thermal radiative capture n+p + d+y. In the Chemtob-Rho (1) approach used by Prof. Blin-Stoyle the exchange current correction was evaluated by first deriving a two-nucleon operator. This operator was then sandwiched between two-nucleon wavefunctions to give the final correction. However? a closer examination of the result showed that the A contribution to the two-body operator was important. This term can be illustrated as in Fig. l(a) and contributes about 2.4 % to the total matrix element. The pair and pionic terms shown in Figs. l(b) and l(c) contribute a further 3.8 % and