scholarly journals Parametric study of hyperfine structure of Zr II even-parity levels

2016 ◽  
Vol 94 (12) ◽  
pp. 1310-1313 ◽  
Author(s):  
Safa Bouazza

Until now experimental hyperfine structure (hfs) data of 12 even-parity Zr II levels were given in the literature. Recently new hyperfine splitting measurements of 11 other Zr II levels, of the same parity are achieved, applying fast-ion-beam laser-fluorescence spectroscopy. The hfs of these 23 gathered levels has been analysed by simultaneous parametrisation of the one- and two-body interactions, first in model space (4d + 5s)3 and secondly in extended space. For the three lowest configurations, radial parameters of the magnetic dipole A and quadrupole electric B factors are deduced in their entirety for 91Zr II, compared and discussed with calculated values, available in the literature, and also with ours, computed by means of the ab initio method. For instance we give the main experimental values of the extracted single-electron hfs parameters of 4d25s: [Formula: see text] = –2701 MHz, [Formula: see text] = –122.4 MHz, and [Formula: see text] = –113.5 MHz.

2016 ◽  
Vol 94 (11) ◽  
pp. 1195-1199 ◽  
Author(s):  
S.D. Rosner ◽  
R.A. Holt

We have applied fast-ion-beam laser-fluorescence spectroscopy to measure the hyperfine structures of seven even-parity and six odd-parity levels in Mo II and the isotope shifts of nine transitions in the wavelength range 424.5–443.4 nm. These are the first measurements of these parameters and almost the first such measurements in Mo II. These atomic data are essential for astrophysical studies of chemical abundances, allowing correction for saturation and the effects of blended lines. They also provide important constraints on stellar diffusion modeling, particularly in chemically peculiar (CP) stars, and serve as valuable input to semi-empirical theoretical models of hyperfine structure and isotope shifts.


1977 ◽  
Vol 15 (6) ◽  
pp. 2293-2297 ◽  
Author(s):  
R. A. Holt ◽  
S. D. Rosner ◽  
T. D. Gaily

1999 ◽  
Vol 32 (5) ◽  
pp. 1345-1349 ◽  
Author(s):  
Ma Hongliang ◽  
Chen Miaohua ◽  
Chen Zhijun ◽  
Shi Wei ◽  
Lu Fuquan ◽  
...  

1992 ◽  
Vol 46 (1) ◽  
pp. 45-51 ◽  
Author(s):  
P Villemoes ◽  
A Arnesen ◽  
F Heijkenskjöld ◽  
A Kastberg ◽  
M O Larsson

1991 ◽  
Vol 18 (3) ◽  
pp. 235-238 ◽  
Author(s):  
P. Villemoes ◽  
A. W�nnstr�m ◽  
A. Arnesen ◽  
R. Hallin ◽  
F. Heijkenskj�ld ◽  
...  

1992 ◽  
Vol 162 (2) ◽  
pp. 178-181 ◽  
Author(s):  
P. Villemoes ◽  
A. Arnesen ◽  
F. Heijkenskjöld ◽  
A. Kastberg ◽  
A. Wännström

1986 ◽  
Vol 33 (3) ◽  
pp. 2117-2120 ◽  
Author(s):  
Roger E. Silverans ◽  
Gustaaf Borghs ◽  
Peter De Bisschop ◽  
Marleen Van Hove

1986 ◽  
Vol 33 (4) ◽  
pp. 2396-2400 ◽  
Author(s):  
T. J. Scholl ◽  
T. D. Gaily ◽  
R. A. Holt ◽  
S. D. Rosner

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