CASCADE-FREE DOPPLER-TUNED PRECISION-MEASUREMENT OF THE LIFETIME OF THE 2 S-3(1) STATE IN HE-LIKE NIOBIUM (NB-93(39+)

被引：13

作者：

SIMIONOVICI, A

BIRKETT, BB

MARRUS, R

CHARLES, P

INDELICATO, P

DIETRICH, DD

FINLAYSON, K

机构：

[1] UNIV CALIF BERKELEY, DEPT PHYS, BERKELEY, CA 94720 USA

[2] UNIV PARIS 06, INST RADIUM, LPAN, F-75252 PARIS 05, FRANCE

[3] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

来源：

PHYSICAL REVIEW A | 1994年 / 49卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.49.3553

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The lifetime of the 2 S-3(1) state in He-like niobium (Nb39+) has been precisely determined with a beam-foil time-of-flight technique. The isotope Nb-93 (I = 9/2) was chosen in order to minimize cascade effects through hyperfine quenching of the primary feeding state. Further precision was obtained by removing blends with a Doppler-tuned transmission filter. Other cascade contributions were analyzed and found to be negligible. The result is 45.45 (16) X 10(-12) sec and represents increased sensitivity to corrections of O(Zalpha)2 in the Zalpha-series expansion for the lifetime by a factor of 5.

引用

页码：3553 / 3556

页数：4

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