A new avenue in the search for CP violation: Mössbauer spectroscopy of $$^{227}$$Ac
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Published:2023-05-26
Issue:5
Volume:59
Page:
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ISSN:1434-601X
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Container-title:The European Physical Journal A
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language:en
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Short-container-title:Eur. Phys. J. A
Author:
Scheck MarcusORCID, Chapman Robert, Dobaczewski Jacek, Ederer Claude, Ivanov Peter, Lorusso Guiseppe, O’Donnell David, Schröder Christian
Abstract
AbstractThis work proposes a new avenue in the search for CP-violating odd-electric and even-magnetic nuclear moments. A promising candidate to find such moments in the ground state is the quadrupole-deformed and octupole-correlated nucleus 227-actinium. In this nucleus, the 27.4-keV E1 transition that connects the $$3/2^+$$
3
/
2
+
parity-doublet partner and the $$3/2^-$$
3
/
2
-
ground state is perfectly suited to apply the sensitive technique of recoil-free selfabsorption, commonly known as Mössbauer spectroscopy. In this experimental approach, the lifetime of the $$3/2^+$$
3
/
2
+
upper parity-doublet partner allows an estimate of the lower limit of $$\Delta E = 2\cdot \Gamma _{\gamma }$$
Δ
E
=
2
·
Γ
γ
= $$23.7(1) \times 10^{-9}$$
23.7
(
1
)
×
10
-
9
eV for the achievable energy resolution to be made. This resolution must be exceeded by the interaction of a CP-violating moment and the corresponding multipole moment of the field distribution in the lattice. This work presents the first ideas for patterns caused by CP-violating moments on the expected quadrupole splitting and nuclear Zeeman effect.
Publisher
Springer Science and Business Media LLC
Subject
Nuclear and High Energy Physics
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