Entries by Simon Stellmer

Radiochemistry meeting in Vienna

We are currently preparing for an informal workshop concerning the radiochemistry of thorium and uranium isotopes. The workshop will be held on April 28 in Vienna, mainly featuring scientists from the NPL radioactivity group (UK) and the Atominstitut in Vienna. Please contact us if you would like to join!

Thorium on steroids: A new proposal by E.V. Tkalya

Many research groups around the world try to get an “optical” handle on the Th-229 isomeric state, but it turns out that the detection of optical photons emitted upon de-excitation of the isomer is no mean feat. As an alternative, one might shift gears and aim to detect the electron that is emitted during internal […]

nuClock on air

What an exciting day for nuClock: Following his talk at the DPG Spring Meeting in Hamburg, Lars von der Wense of LMU Munich made an appearance on radio Deutschlandfunk. He was interviewed in a science show and explained the concepts, prospects, and applications of a nuclear clock. The interview is in German, and the audio […]

Upcoming conferences: Meet the nuClock people!

You would love to meet some of the nuClock folks in person? This is where you will get a chance: DPG Frühjahrtagung in Hannover, Feb. 29 – March 04, 2016  (AMO physics) Talks: Mo, 11:00     MS 1.1    “Towards a nuclear clock: On the direct detection of the Thorium-229 isomer” by Lars von der Wense […]

Beamtime at SPring-8

Exciting thorium-related research activity is currently going on in Japan! Out of a multitude of approaches to populate the isomeric state, a Japanese/Austrian initiative chose “optical” pumping with X-rays. Synchrotron radiation at SPring-8 is used to excite the Th-229 nucleus into the second excited state, located at 29 keV. This state may de-excite back into […]

New publication by the LMU group

The LMU Munich group has published a new paper on the characterization of their experimental set-up. Th-229 recoils (hopefully many of them in the isomeric state) are extracted from a thin U-233 source. The ions are cooled, collimated, and mass-filtered before being gently deposited on a micro-electrode. This part of the set-up has already been […]

New publication by the Vienna group

While there is little doubt about the existence of the Th-229 isomeric state, a direct measurement of its energy and lifetime are still pending. The current best value of the isomer wavelength is 159(10) nm, where the error stated here is purely statistical. The uncertainty needs to improved by at least one or two orders […]

Visit of Prof. Minkov at MPIK Heidelberg

Prof. Dr. Nikolay Minkov visited the MPIK group in Heidelberg on Nov. 16 and 17. Prof. Minkov works at the Institute for Nuclear Research and Nuclear Energy in Sofia, Bulgaria, and is a specialist in collective models and nuclear deformation. Today, he gave a seminar talk on “Deformations and magnetic moments in nuclear high-K isomeric […]

nuClock library and other resources

It’s been precisely 3 months since the nuClock website went online! Every day, the website is currently visited by 30 people on average. Close to 500 visitors have found our site already and clicked on our pages more than 3000 times. Today, we are launching a new category, called “resources”. As a service to the […]