Prompt dipole radiation in fusion reactions

TL;DR

This paper investigates prompt gamma ray emission in fusion reactions at 16A MeV, revealing a dipole oscillation pattern in the radiation consistent with collective bremsstrahlung analysis.

Contribution

It provides new experimental evidence of prompt dipole radiation at high energies and compares it with theoretical collective bremsstrahlung models.

Findings

Prompt gamma emission persists at high beam energy.

Angular distribution indicates dipole oscillation along symmetry axis.

Data aligns with collective bremsstrahlung calculations.

Abstract

The prompt gamma ray emission was investigated in the 16A MeV energy region by means of the 36,40Ar+96,92Zr fusion reactions leading to a compound nucleus in the vicinity of 132Ce. We show that the prompt radiation, which appears to be still effective at such a high beam energy, has an angular distribution pattern consistent with a dipole oscillation along the symmetry axis of the dinuclear system. The data are compared with calculations based on a collective bremsstrahlung analysis of the reaction dynamics.