Effect of the neutron quadrupole distribution in the TaO$^+$ cation
Gleb Penyazkov, Leonid V. Skripnikov, Alexander V. Oleynichenko and, Andr\'ei V. Zaitsevskii
TL;DR
This paper estimates the tensor parity nonconserving interaction in the TaO$^+$ cation to probe neutron quadrupole distribution, using relativistic coupled cluster theory to evaluate relevant constants and identify the ground state for experiments.
Contribution
It provides the first theoretical estimate of the PNC interaction constant in TaO$^+$, linking molecular properties to nuclear neutron distribution.
Findings
The $^3\Delta_1$ state is the ground state of TaO$^+$.
The PNC interaction constant is evaluated using relativistic coupled cluster theory.
The study suggests TaO$^+$ as a candidate for probing neutron quadrupole distribution.
Abstract
We estimate the effect of the tensor parity nonconserving (PNC) interaction in the TaO molecular cation. It can be used to probe the unknown quadrupole distribution of the neutrons inside the Ta nucleus. To this end, we evaluate the constant which characterizes this interaction using the relativistic Fock space coupled cluster theory for electronic structure modelling. The state of the TaO cation which can be used to measure the PNC effect is found to be the ground one in agreement with the previous theoretical study.
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