Nonlocality in deuteron stripping reactions

Area of Science:

• Nuclear Physics
• Reaction Theory

Background:

• Deuteron stripping reactions (d,p) are crucial for nuclear structure studies.
• Current analyses often use the "E(d)/2" rule for nucleon potentials.
• Accurate spectroscopic factors and asymptotic normalization coefficients are vital for nuclear shell evolution and stellar reaction predictions.

Purpose of the Study:

• To develop a consistent method for analyzing (d,p) reactions.
• To incorporate nonlocality and three-body effects accurately.
• To re-evaluate the interpretation of (d,p) reactions for nuclear structure properties.

Main Methods:

• Proposing a new analysis method for (d,p) reactions.
• Utilizing equivalent local nucleon potentials with a shifted energy (∼40 MeV above "E(d)/2").
• Consistently accounting for nonlocality and three-body dynamics.

Main Results:

• The energy shift arises from the kinetic energy of neutron-proton components in the deuteron.
• This shift significantly alters effective deuteron-nucleus potentials.
• Predicted (d,p) cross sections are modified, affecting nuclear structure interpretations.

Conclusions:

• The proposed method offers a more consistent analysis of (d,p) reactions.
• The significant energy shift challenges previous interpretations based on the "E(d)/2" rule.
• This work impacts the extraction of nuclear structure information and stellar reaction rates.