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http://hdl.handle.net/2248/5782
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DC Field | Value | Language |
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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 |
Appears in Collections: | IIAP Publications |
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Theoretical aids in screening candidates for atomic clocks.pdf Restricted Access | Restricted Access | 167.09 kB | Adobe PDF | View/Open Request a copy |
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