MEASUREMENTS OF ISOTOPE SHIFT IN EU-II

被引：15

作者：

BROSTROM, L

MANNERVIK, S

ROYEN, P

WANNSTROM, A

机构：

[1] UNIV STOCKHOLM,DEPT PHYS,S-11346 STOCKHOLM,SWEDEN

[2] UNIV UPPSALA,DEPT PHYS,S-75121 UPPSALA,SWEDEN

来源：

PHYSICA SCRIPTA | 1995年 / 51卷 / 03期

关键词：

D O I：

10.1088/0031-8949/51/3/008

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The isotope shift between singly-charged Eu-151 and Eu-153 in the 4f(7)(S-8 degrees)6s S-9 degrees(4) - 4f(7)(S-8 degrees)6p(1/2) J = 4 transition at 4129 Angstrom has been measured using fast ion beam-laser technique. This Eu line has attracted interest in connection with efforts of obtaining a cosmochronometer based on observed Th/Eu abundance ratios. Knowledge of the isotope shift is of importance in order to check that contaminations from line blends do not contribute to the line intensity of Eu II. The measured value of the isotope shift -0.1527 (2) cm(-1) is consistent with the old spectroscopic value of Krebs and Winkler (-0.1503 (25 )cm(-1)) using a Fabry-Perot interferometer, while the accuracy is improved substantially.

引用

页码：330 / 333

页数：4

共 20 条

[1] HYPERFINE-STRUCTURE MEASUREMENTS OF THE EU-151+, EU-153+ GROUND-STATE [J].

BECKER, O ;

ENDERS, K ;

WERTH, G ;

DEMBCZYNSKI, J .

PHYSICAL REVIEW A, 1993, 48 (05) :3546-3554

[2] INVESTIGATION OF SOME TRANSITIONS AND LIFETIMES IN XE-II [J].

BROSTROM, L ;

MANNERVIK, S ;

PASSIAN, A ;

SUNDSTROM, G .

PHYSICAL REVIEW A, 1994, 49 (05) :3333-3337

[3] THORIUM IN G-DWARF STARS AS A CHRONOMETER FOR THE GALAXY [J].

BUTCHER, HR .

NATURE, 1987, 328 (6126) :127-131

[4]

FRANCOIS P, 1993, ASTRON ASTROPHYS, V274, P821

[5]

GERSTENKORN S, ATLAS SPECTRE ABSORP

[6] ATOMIC DATA AND THE SPECTRUM OF THE SOLAR PHOTOSPHERE [J].

GREVESSE, N ;

NOELS, A .

PHYSICA SCRIPTA, 1993, T47 :133-138

[7]

GREVESSE N, 1993, COMMUNICATION

[8] REVISED ANALYSIS OF SINGLY IONIZED XENON, XE-II [J].

HANSEN, JE ;

PERSSON, W .

PHYSICA SCRIPTA, 1987, 36 (04) :602-643

[9] ZUR HYPERFEINSTRUKTUR DES EU-II [J].

KREBS, K ;

WINKLER, R .

ZEITSCHRIFT FUR PHYSIK, 1960, 160 (03) :320-332

[10] CONTAMINATION OF THE TH-II LINE AND THE AGE OF THE GALAXY [J].

LAWLER, JE ;

WHALING, W ;

GREVESSE, N .

NATURE, 1990, 346 (6285) :635-637

← 1 2 →