Building an optical clock based on the Th-229 nuclear transition is the ultimate goal of the nuClock project. We like to claim that such a nuclear clock will be less sensitive to perturbations (because the nucleus is so much smaller than the orbits of valence electrons), offer a supreme quality factor (because the transition energy […]
About Simon Stellmer
This author has yet to write their bio.Meanwhile lets just say that we are proud Simon Stellmer contributed a whooping 71 entries.
Entries by Simon Stellmer
Lars von der Wense, nuClock superhero of 2015, will face his PhD exam on Friday, Feb. 3. Although his chances of success appear rather small, we still wish him all the best 🙂 Good luck, Lars!
A few days ago, a new manuscript was submitted to the arXiv preprint server. It discusses a new approach to measure (or at least contrain) the Th-229 isomer energy by optically exciting Th+ or Th2+ ions into metastable electronic states, and seeking to observe internal conversion from the excited electronic state to the nucleus. Laser […]
The alpha decay of U-233 is a well-established approach to obtain Th-229 atoms or ions in the isomeric state. In fact, it is the only method to date that has been shown to be capable of populating the isomer. Still, the probability of feeding the isomer has not been measured. A value of 2% is […]
We hope you all had a joyful holiday season. With 2017 just around the corner, nuClock wishes peace, luck, and success in 2017 to all of you: the partners, associates, fans & followers, and all your family and friends. Happy New Year!
Towards the end of each year, the editors of the “Physics World” elect ten experiments or publications that they consider to be the most important scientific breakthroughs of the past year. Although an entirely subjective choice, this “Top-10” list has gained quite some visibility over the past years. To our great delight, the direct detection […]
In a joint experiment of the LMU group and the PTB group a first run of laser spectroscopy experiments has been done on trapped Th-229 from the Munich recoil ion catcher, with laser systems and optical detection methods developed at PTB. The measurements should provide crucial information on the nuclear properties of the isomeric state […]
Nobelium is one of these heavy and short-lived elements at the bottom of the periodic table. It has a nuclear charge Z = 102 and even its most stable isotope has a half-life of less than a minute. Elements with Z > 100 are called transfermium elements, and so far, no laser spectroscopy has ever […]
We are deeply saddened to learn that Debbie left us much too soon. She was a great physicist and a kind person. Our thoughts are with her family, colleagues, and friends.
The 2016 Ars Electronica Festival took place last week in Linz: a perfect venue for the first public appearance of nuClock’s art project! Kerstin Ergenzinger presented her past & future work, and Thorsten Schumm took part in a podium discussion on future plans of strengthening the arts/science collaboration in Europe.