First direct determination of the superallowed $β$-decay $Q_{EC}$-value for $^{14}$O
Abstrak
We report the first direct measurement of the $^{14}\text{O}$ superallowed Fermi $β$-decay $Q_{EC}$-value, the last of the so-called "traditional nine" superallowed Fermi $β$-decays to be measured with Penning trap mass spectrometry. $^{14}$O, along with the other low-$Z$ superallowed $β$-emitter, $^{10}$C, is crucial for setting limits on the existence of possible scalar currents. The new ground state $Q_{EC}$ value, 5144.364(25) keV, when combined with the energy of the $0^+$ daughter state, $E_x(0^+)=2312.798(11)$~keV [Nucl. Phys. A {\bf{523}}, 1 (1991)], provides a new determination of the superallowed $β$-decay $Q_{EC}$ value, $Q_{EC}(\text{sa}) = 2831.566(28)$ keV, with an order of magnitude improvement in precision, and a similar improvement to the calculated statistical rate function $f$. This is used to calculate an improved $\mathcal{F}t$-value of 3073.8(2.8) s.
Topik & Kata Kunci
Penulis (15)
A. A. Valverde
G. Bollen
M. Brodeur
R. A. Bryce
K. Cooper
M. Eibach
K. Gulyuz
C. Izzo
D. J. Morrissey
M. Redshaw
R. Ringle
R. Sandler
S. Schwarz
C. S. Sumithrarachchi
A. C. C. Villari
Akses Cepat
- Tahun Terbit
- 2015
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓