Precision measurement of the nuclear polarization in laser-cooled, optically pumped $^{37}\mathrm{K}$
| العنوان: | Precision measurement of the nuclear polarization in laser-cooled, optically pumped $^{37}\mathrm{K}$ |
|---|---|
| المؤلفون: | B. Fenker, C. Farfan, Daniel Ashery, H. Norton, J M Donohue, D. Friesen, Melissa Anholm, K. Olchanski, J McNeil, A. Gorelov, M. Mehlman, O. Theriault, A N Vantyghem, I. Craiciu, John Behr, I Cohen, Dan Melconian, R.M.A. Anderson, R. S. Behling, S. Smale, C. L. Warner |
| سنة النشر: | 2016 |
| مصطلحات موضوعية: | Physics, education.field_of_study, Energetic neutral atom, Atomic Physics (physics.atom-ph), 010308 nuclear & particles physics, Population, FOS: Physical sciences, General Physics and Astronomy, Weak interaction, Polarization (waves), Laser, 01 natural sciences, Fundamental interaction, law.invention, Physics - Atomic Physics, Optical pumping, Bloch equations, law, 0103 physical sciences, Physics::Atomic Physics, Nuclear Experiment (nucl-ex), Atomic physics, 010306 general physics, education, Nuclear Experiment |
| الوصف: | We report a measurement of the nuclear polarization of laser-cooled, optically-pumped $^{37}\mathrm{K}$ atoms which will allow us to precisely measure angular correlation parameters in the beta-decay of the same atoms. These results will be used to test the $V-A$ framework of the weak interaction at high precision. At the TRIUMF Neutral Atom Trap (TRINAT), a magneto-optical trap (MOT) confines and cools neutral $^{37}\mathrm{K}$ atoms and optical pumping spin-polarizes them. We monitor the nuclear polarization of the same atoms that are decaying in situ by photoionizing a small fraction of the partially polarized atoms and then use the standard optical Bloch equations to model their population distribution. We obtain an average nuclear polarization of $P = 0.9913\pm0.0008$, which is significantly more precise than previous measurements with this technique. Since our current measurement of the beta-asymmetry has $0.2\%$ statistical uncertainty, the polarization measurement reported here will not limit its overall uncertainty. This result also demonstrates the capability to measure the polarization to $ 32 pages, 11 figures, submitted to New Journal of Physics |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::faba70205dae564dc8852c88e3d26530 http://arxiv.org/abs/1602.04526 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....faba70205dae564dc8852c88e3d26530 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |