Preparatory studies for a high-precision Penning-trap measurement of the 163Ho electron capture Q-value

Schneider, F.; Beyer, T.; Blaum, K.; Block, M.; Chenmarev, S.; Dorrer, H.; Düllmann, Ch. E.; Eberhardt, K.; Eibach, M.; Eliseev, S.; Grund, J.; Köster, U.; Nagy, Sz.; Novikov, Yu. N.; Renisch, D.; Türler, Andreas; Wendt, K. (2015). Preparatory studies for a high-precision Penning-trap measurement of the 163Ho electron capture Q-value. The European physical journal. A, 51(7) Springer 10.1140/epja/i2015-15089-8

[img] Text
art%3A10.1140%2Fepja%2Fi2015-15089-8.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (910kB) | Request a copy

The ECHo Collaboration (Electron Capture 163Ho aims to investigate the calorimetric spectrum following the electron capture decay of 163Ho to determine the mass of the electron neutrino. The size of the neutrino mass is reflected in the endpoint region of the spectrum, i.e., the last few eV below the transition energy. To check for systematic uncertainties, an independent determination of this transition energy, the Q-value, is mandatory. Using the TRIGA-TRAP setup, we demonstrate the feasibility of performing this measurement by Penning-trap mass spectrometry. With the currently available, purified 163Ho sample and an improved laser ablation mini-RFQ ion source, we were able to perform direct mass measurements of 163Ho and 163Dy with a sample size of less than 1017 atoms. The measurements were carried out by determining the ratio of the cyclotron frequencies of the two isotopes to those of carbon cluster ions using the time-of-flight ion cyclotron resonance method. The obtained mass excess values are ME(163Ho)= −66379.3(9) keV and ME(163Dy)= −66381.7(8) keV. In addition, the Q-value was measured for the first time by Penning-trap mass spectrometry to be Q = 2.5(7) keV.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Departement of Chemistry and Biochemistry

UniBE Contributor:

Türler, Andreas

Subjects:

500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry

ISSN:

1434-6001

Publisher:

Springer

Language:

English

Submitter:

Franziska Bornhauser-Rufer

Date Deposited:

02 Feb 2016 14:23

Last Modified:

03 Nov 2017 09:19

Publisher DOI:

10.1140/epja/i2015-15089-8

BORIS DOI:

10.7892/boris.75645

URI:

https://boris.unibe.ch/id/eprint/75645

Actions (login required)

Edit item Edit item
Provide Feedback