Level Structure of 103Ag at high spins

TL;DR

This study explores high spin states in 103Ag using gamma-ray spectroscopy, revealing magnetic and chiral features with implications for nuclear structure understanding.

Contribution

The paper reports the first observation of nearly-degenerate doublet bands and magnetic phenomena in 103Ag at high spins, supported by experimental and microscopic analysis.

Findings

Observation of a ΔJ=1 sequence with magnetic transitions

Identification of nearly-degenerate doublet bands

Decreasing B(M1) strength with increasing spin

Abstract

High spin states in $^{103}$Ag were investigated with the Gammasphere array, using the $^{72}$Ge($^{35}$Cl,$2p2n$)$^{103}$Ag reaction at an incident beam energy of 135 MeV. A $\Delta J$=1 sequence with predominantly magnetic transitions and two nearly-degenerate $\Delta J=1$ doublet bands have been observed. The dipole band shows a decreasing trend in the $B(M1)$ strength as function of spin, a well established feature of magnetic bands. The nearly-degenerate band structures satisfy the three experimental signatures of chirality in the nuclei; however microscopic calculations are indicative of a magnetic phenomenon