Progress Towards Measurement of the Anapole Moment of 137 Ba19 F
Abstract
Weak interactions inside the nucleus produce a toroidal current distribution around the axis of nuclear spin. This current distribution, known as the nuclear anapole moment is the dominant source of nuclear spin-dependent parity violation (NSD-PV) effects for nuclei with nucleon number A >= 20.We propose to measure the anapole moment of 137 Ba19 F. To diagnose systematics and establish a measurement sequence we use 138 Ba19 F, which has negligible NSD-PV effects. 138 Ba19 F has a larger isotopic abundance and fewer hyperfine levels compared to those of 137 Ba19 F. Therefore fluorescence signals from 138 Ba19 F are approximately 26 times larger than those from 137 Ba19 F. Here we present planned improvements to our apparatus, including a magnetic hexapole lens to improve the molecular beam flux and preliminary spectroscopy measurements with 137 Ba19 F.
- Publication:
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APS Division of Atomic, Molecular and Optical Physics Meeting Abstracts
- Pub Date:
- May 2016
- Bibcode:
- 2016APS..DMP.Q1176C