PPT Slide

Summary of single-nucleon transfer and knockout

Each of these processes can probe single-particle structure:

measure the occupancy of single-particle (shell model) orbitals (spectroscopic factors)

With knockout we can probe:

occupancy of single-particle (shell model) orbitals in the projectile ground state

hence, identify the s.p. level energies in odd-A nuclei produced from even-even projectiles

and the projectile-like particle is detected essentially at zero degrees

With transfer we can probe:

occupancy of single-particle (shell model) orbitals in the original nucleus A ground state

or distribution of s.p. strength in all final states of A–1 or A+1 nucleus

that is, can add a nucleon to the original nucleus, e.g. by (d,p)

hence, identify the s.p. level energies in A–1 or A+1 nuclei produced from even-even nuclei

identify the s.p. purity of coupled states in A–1 or A+1 nuclei produced from odd nuclei

and the scattered particle is detected, with most yield being at small centre-of-mass angles

Knockout has recently been developed specifically for radioactive beams (initially for haloes)

and the nucleus being studied is the projectile. The removed nucleon may go anywhere.

Transfer was developed in the 1950’s for stable beams (initially for p, d, t, 3He, … )

and the nucleus being studied was the target. The removed nucleon must transfer and “stick”.

With radioactive beams, the p, d, …etc., becomes the target, known as inverse kinematics