dc.contributor.author |
Chaudhuri, R. K |
|
dc.contributor.author |
Freed, K. F |
|
dc.contributor.author |
Chattopadhyay, S |
|
dc.contributor.author |
Mahapatra, U. S |
|
dc.date.accessioned |
2012-06-25T12:04:17Z |
|
dc.date.available |
2012-06-25T12:04:17Z |
|
dc.date.issued |
2012-04 |
|
dc.identifier.citation |
Europhysics Letters, Vol. 98, No. 2, 23002 |
en |
dc.identifier.issn |
0295-5075 |
|
dc.identifier.uri |
http://hdl.handle.net/2248/5782 |
|
dc.description |
Restricted Access |
en |
dc.description.abstract |
Highly accurate electronic-structure calculations for metastable electronic excited states are needed to supplement scant experimental data in screening possible systems for new higher-precision atomic clocks. We test the suitability of relativistic coupled-cluster methods for the low-lying F-2 degrees excited states of the Yb II ion by computing the ionization potentials (IP) for the S-2(1/2) and F-2 degrees states of Yb I and the [Xe]4f(14)6s (S-2(1/2)) -> [Xe]4f(13)6s(2) (F-2 degrees(j)), j = 5/2, 7/2, electric octupole transition amplitudes. The calculations establish a minimum lifetime of six years and of 10(-1) s for the F-2 degrees(7/2) and F-2 degrees(5/2) states, respectively. In addition, computations for the lifetimes (T) of its [Xe]4f(14)6p (P-2 degrees) states are compared with high-precision experimental data as tests of the accuracy of our predictions. To our knowledge, this is the first relativistic ab initio estimate of the lifetime and ionization potential for the F-2 degrees states of Yb II, and the results demonstrate the suitability of these methods to aid in screening other candidates for atomic clocks. |
en |
dc.language.iso |
en |
en |
dc.publisher |
IOP Publishing |
en |
dc.relation.uri |
http://dx.doi.org/10.1209/0295-5075/98/23002 |
en |
dc.rights |
© IOP Publishing |
en |
dc.subject |
Coupled-cluster theory |
en |
dc.subject |
Oscillator-strengths |
en |
dc.subject |
Transition |
en |
dc.subject |
Lifetimes |
en |
dc.subject |
Energy |
en |
dc.subject |
Ions |
en |
dc.title |
Theoretical aids in screening candidates for atomic clocks: Illustration for Yb II |
en |
dc.type |
Article |
en |