Lifetime, collisional-quenching, and<i>j</i>-mixing measurements of the metastable 3<i>D</i>levels of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Ca</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>

Knoop, Martina; Vedel, M; Vedel, Fernande

doi:10.1103/physreva.52.3763

Cited by 47 publications

(55 citation statements)

References 13 publications

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“…This table lists a wide range of values with contrasting error bars. For example, in an early experiment on an ion cloud without laser cooling, Arbes et al obtained r3d5/2 = 1.154(61) s [19], which does not agree with Knoop et al's result of 0.994(38) s [20]. However, applying laser cooling technology to the ion cloud, Knoop et al's improved result [28] and Gudjons et al's result [21] agreed with each other and, also, agreed with the measurement conducted on the stored ion beam [22].…”

Section: Introductionmentioning

confidence: 55%

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40
Guan
¹
,
Shao
²
,
Yuan
³

et al. 2015
Phys. Rev. A
15
6
11
0
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In light of the diverse range of reported values for the lifetimes of metastable states of 40Ca+, we have carried out afresh both measurements and theoretical investigation to confirm the lifetime of its 3d 2D5/2 state (T3rf5/2). A high-efficiency quantum state detection method by monitoring the quantum jumps of a laser-cooled single Ca+ ion in a miniature ring Paul trap was employed in the measurement. Also, sophisticated calculations were performed considering higher order nonlinear terms in the relativistic coupled-cluster (RCC) method with all possible single and double excitations, but accounting only for the important triple excitations from both the core and the valence orbitals. Systematic factors affecting measurement, such as collision with background gases, heating effects, the power of the 866-nm laser, and state detection errors were carefully analyzed. Our observational and theoretical values for r}d5/2 are 1174(10) ms and 1172 (3) ms, respectively, which agree well with the experimental results reported by P. A. Barton et at. [Phys. Rev. A 62, 032503 (2000)] and A. Kreuter etal. [Phys. Rev. A 7 1 ,032504 (2005)]. The present theoretical analysis demonstrates that the contributions from the core triples and Breit interaction are notable, as they improve the theoretical results obtained in the previous RCC calculations [B. K. Sahoo, Phys. Rev. A 74, 062504 (2006)].

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Section: Introductionmentioning

confidence: 55%

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40
Guan
¹
,
Shao
²
,
Yuan
³

et al. 2015
Phys. Rev. A
15
6
11
0
View full text Add to dashboard Cite

show abstract

“…Ca + − Lifetime measurements of the metastable 3d levels of Ca + were reported by Knoop et al [23] using the Ca + ions stored in a Paul trap. The natural lifetimes were determined to be 1111(46) ms and 994 (38) ms, for the 3d 3/2 and 3d 5/2 states, respectively, in agreement with previous experiments.…”

Section: Summary Of Prior Results For the E2 Transitionsmentioning

confidence: 99%

Forbidden M1 and E2 transitions in monovalent atoms and ions

Safronova

Johnson

2017

Phys. Rev. A

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We carried out a systematic high-precision relativistic study of the forbidden magnetic-dipole and electric-quadrupole transitions in Ca + , Rb, Sr + , Cs, Ba + , Fr, Ra + , Ac 2+ and Th 3+ . This work is motivated by the importance of these transitions for tests of fundamental physics and precision measurements. The relative importance of the relativistic, correlation, Breit correction and contributions of negative-energy states is investigated. Recommended values of reduced matrix elements are presented together with their uncertainties. The matrix elements and resulting lifetimes are compared with other theoretical values and with experiment where available.

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“…This suggests that the 4s → 3d J matrix element ratios should be close to the values expected from angular momentum coupling considerations. Older experiments [58,60] give ratios further from unity, but in these cases the uncertainties are much larger.…”

Section: A Reduced Matrix Elementsmentioning

confidence: 99%

Dynamic polarizabilities for the low-lying states of Ca+

et al. 2013

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The dynamic polarizabilities of the 4s, 3d and 4p states of Ca + , are calculated using a relativistic structure model. The wavelengths at which the Stark shifts between different pairs of transitions are zero are computed. Experimental determination of the magic wavelengths can be used to estimate the ratio of the f 3d J →4p J ′ and f4s 1/2 →4p J ′ oscillator strengths. This could prove valuable in developing better atomic structure models and in particular lead to improved values of the polarizabilities needed in the evaluation of the blackbody radiation shift of the Ca + ion.

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Lifetime, collisional-quenching, andj-mixing measurements of the metastable 3Dlevels ofCa+

Cited by 47 publications

References 13 publications

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40
Guan
¹
,
Shao
²
,
Yuan
³

et al. 2015
Phys. Rev. A
15
6
11
0
View full text Add to dashboard Cite

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40
Guan
¹
,
Shao
²
,
Yuan
³

et al. 2015
Phys. Rev. A
15
6
11
0
View full text Add to dashboard Cite

Forbidden M1 and E2 transitions in monovalent atoms and ions

Dynamic polarizabilities for the low-lying states of Ca+

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Lifetime, collisional-quenching, andj-mixing measurements of the metastable 3Dlevels ofCa+

Cited by 47 publications

References 13 publications

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40Guan1, Shao2, Yuan3 et al. 2015Phys. Rev. A156110View full textAdd to dashboardCite

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40Guan1, Shao2, Yuan3 et al. 2015Phys. Rev. A156110View full textAdd to dashboardCite

Forbidden M1 and E2 transitions in monovalent atoms and ions

Dynamic polarizabilities for the low-lying states of Ca+

Contact Info

Product

Resources

About

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40
Guan
¹
,
Shao
²
,
Yuan
³

et al. 2015
Phys. Rev. A
15
6
11
0
View full text Add to dashboard Cite

Combined experimental and theoretical probe of the lifetime of the3d2D5/2state in40
Guan
¹
,
Shao
²
,
Yuan
³

et al. 2015
Phys. Rev. A
15
6
11
0
View full text Add to dashboard Cite