Peer-reviewed publication
Direct decay-energy measurement as a route to the neutrino mass
Hyperfine Interactions 240, 61
Source verified
A canonical external source is linked for this record.
- Date
- 2019-06-12
- Identifier
- 10.1007/s10751-019-1601-z
What it covers
A direct measurement of the ¹³¹Cs to ¹³¹Xe electron-capture Q-value, used both to test PI-ICR at ISOLTRAP and to decide whether that pair can serve a neutrino-mass experiment.
Methods and setup
ISOLTRAP combined classical ToF-ICR with the newly commissioned PI-ICR method. PI-ICR reached a relative mass precision of 1.4×10⁻⁹ and a resolving power above 10⁷ in one second of trapping.
Why it matters
The new Q-value is 25 times more precise and shows the would-be capture to the excited ¹³¹Xe state is energetically closed. That removes ¹³¹Cs/Xe as a neutrino-mass candidate and is the public proof that PI-ICR now works online at ISOLTRAP.
Research topics
Nuclear physicsCERNISOLDENeutrino mass