Structure of negative parity states at  MeV in

A. Heusler

doi:10.1140/epja/s10050-020-00146-4

EPJ

a
b
c
d
e
ap
st
h
plus
ds
pv
ti
qt
am
n

2024 Impact factor 2.8

Hadrons and Nuclei

Open Access

Eur. Phys. J. A (2020) 56: 178
https://doi.org/10.1140/epja/s10050-020-00146-4

Regular Article – Experimental Physics

Structure of negative parity states at ${\mathbf {6}\,\lesssim \, \mathbf {E}_\mathbf {x} <{\mathbf {7.0}} }$ MeV in $\mathbf {^{208}}{} \mathbf{Pb}$

A. Heusler^*

Gustav-Kirchhoff-Str. 7/1, 69120, Heidelberg, Germany

^* e-mail: A.Heusler@mpi-hd.mpg.de

Received: 22 November 2019
Accepted: 18 April 2020
Published online: 7 July 2020

Abstract

In the doubly magic nucleus $^{208}\mathrm{Pb}$ states at excitation energies $6\,\lesssim \, E_x <7.0$ MeV populated by the inelastic proton scattering via the doublet isobaric analog resonances g $_{{ 7}/{2}}$ +d $_{{ 3}/{2}}$ in $^{209}\mathrm{Bi}$ are studied. Sixteen states containing dominant strengths of the configurations g $_{{ 7}/{2}}$ p $_{{ 3}/{2}}$ , d $_{{ 3}/{2}}$ p $_{{ 3}/{2}}$ , g $_{{ 7}/{2}}$ f $_{{ 5}/{2}}$ , d $_{{ 3}/{2}}$ f $_{{ 5}/{2}}$ are newly assigned spins from $$2^-$$ to $$6^-$$ , among them ten states are newly identified. Amplitudes with relative signs of up to four one-particle one-hole configurations with strengths down to 0.05% are determined in 40 states with spins from 1 $$^-$$ to $$6^-$$ . Amplitudes of configurations d $_{{ 3}/{2}}$ p $_{{ 1}/{2}}$ , d $_{{ 3}/{2}}$ p $_{{ 3}/{2}}$ , d $_{{ 3}/{2}}$ f $_{{ 5}/{2}}$ for fourteen states and amplitudes of g $_{{ 7}/{2}}$ p $_{{ 1}/{2}}$ , g $_{{ 7}/{2}}$ p $_{{ 3}/{2}}$ , g $_{{ 7}/{2}}$ f $_{{ 5}/{2}}$ for twenty-seven states are determined. Total strengths up to the full strength are found for configurations d $_{{ 3}/{2}}$ p $_{{ 1}/{2}}$ , d $_{{ 3}/{2}}$ p $_{{ 3}/{2}}$ , d $_{{ 3}/{2}}$ f $_{{ 5}/{2}}$ with spins from $$1^-$$ to $$3^-$$ and for g $_{{ 7}/{2}}$ p $_{{ 1}/{2}}$ , g $_{{ 7}/{2}}$ p $_{{ 3}/{2}}$ , g $_{{ 7}/{2}}$ f $_{{ 5}/{2}}$ with spins from 1 $$^-$$ to $$6^-$$ .