TY - JOUR

T1 - HfF+ as a candidate to search for the nuclear weak quadrupole moment

AU - Skripnikov, L.V.

AU - Petrov, A. N.

AU - Titov, A.V.

AU - Flambaum, V. V.

PY - 2019/1/28

Y1 - 2019/1/28

N2 - Nuclei with a quadrupole deformation, such as Hf-177 have enhanced weak quadrupole moment which induces the tensor weak electron-nucleus interaction in atoms and molecules. Corresponding parity-non-conserving (PNC) effect is strongly enhanced in the (3)Delta(1) electronic state of the (HfF+)-Hf-177 cation which has very close opposite parity levels mixed by this tensor interaction. In the present paper we perform relativistic many-body calculations of this PNC effect. It is shown that the tensor weak interaction induced by the weak quadrupole moment gives the dominating contribution to the PNC effects in (HfF+)-Hf-177 which significantly exceeds contributions of the vector anapole moment and the scalar weak charge. The anapole and the weak charge can contribute due to the nonadiabatic mechanism proposed here. Therefore, corresponding experiment will allow one to separate the tensor weak PNC effect from the other PNC effects and to measure the quadrupole moment of the neutron distribution which gives the dominating contribution to the weak quadrupole moment.

AB - Nuclei with a quadrupole deformation, such as Hf-177 have enhanced weak quadrupole moment which induces the tensor weak electron-nucleus interaction in atoms and molecules. Corresponding parity-non-conserving (PNC) effect is strongly enhanced in the (3)Delta(1) electronic state of the (HfF+)-Hf-177 cation which has very close opposite parity levels mixed by this tensor interaction. In the present paper we perform relativistic many-body calculations of this PNC effect. It is shown that the tensor weak interaction induced by the weak quadrupole moment gives the dominating contribution to the PNC effects in (HfF+)-Hf-177 which significantly exceeds contributions of the vector anapole moment and the scalar weak charge. The anapole and the weak charge can contribute due to the nonadiabatic mechanism proposed here. Therefore, corresponding experiment will allow one to separate the tensor weak PNC effect from the other PNC effects and to measure the quadrupole moment of the neutron distribution which gives the dominating contribution to the weak quadrupole moment.

KW - GENERAL COUPLED-CLUSTER

KW - ATOMS

UR - http://www.scopus.com/inward/record.url?scp=85060695283&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/hff-candidate-search-nuclear-weak-quadrupole-moment

U2 - 10.1103/PhysRevA.99.012517

DO - 10.1103/PhysRevA.99.012517

M3 - статья

VL - 99

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

SN - 1050-2947

IS - 1

M1 - 012517

ER -