Dresden 2013 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HK: Fachverband Physik der Hadronen und Kerne
HK 56: Poster - Struktur und Dynamik von Kernen
HK 56.3: Poster
Wednesday, March 6, 2013, 16:45–19:00, HSZ 4.OG
Precision mass measurements with the mass spectrometer ISOLTRAP — •Dinko Atanasov — Max-Planck-Institut für Kernphysik, Heidelberg, Germany, — IMPRS-PTFS, Heidelberg, Germany.
The precision of nuclear masses has been greatly improved after introducing Penning traps as a tool for direct mass measurements. With the mass spectrometer ISOLTRAP relative mass uncertainties of 1·10−8 or better are routinely reached. The present setup consists of a combination of four traps: a radio frequency Paul trap (used to cool and bunch the beam), a multi-reflection time-of-flight mass separator or MR-TOF MS for short (used to purify the beam), a preparation Penning trap (for further preparation and purification), and a precision Penning trap (for the mass measurement). Presently, the ISOLTRAP setup offers several techniques to determine the masses of singly charged ions. For example, the time-of-flight method employed at the MR-TOF or the time-of-flight ion cyclotron resonance (TOF-ICR) technique using the precision Penning trap. Measurements with the MR-TOF MS still offer a relative uncertainty on the order of 10−7.
The ISOLTRAP experiment itself is located at the isotope separator on-line facility (ISOLDE) at CERN, where a broad mass range of stable and short-lived exotic species can be investigated. Recent mass measurements on neutron-rich Zn and Cs isotopes will be presented. Furthermore, their impact on nuclear structure and astrophysics will be discussed.