TRANSITION INTENSITIES AND CONVERSION COEFFICIENTS IN Dy160

1960 ◽  
Vol 38 (2) ◽  
pp. 262-271 ◽  
Author(s):  
M. A. Clark
Keyword(s):  
Rotational Band ◽  
Ground State ◽  
Unified Model ◽  
Asymmetric Rotor ◽  
Conversion Coefficients ◽  
Relative Transition ◽  
Gamma Transitions

K-conversion coefficients for gamma transitions in Dy160 have been measured and the transition multipolarities determined as follows (Eγ, αK, multipolarity): 86.7 kev, 1.5 (E2); 197 kev, 1.6 × 10−1 (E2); 216 kev, 4.0 × 10−2 (E1); 299 kev, 1.3 × 10−2 (E1); 880 kev, 3.1 × 10−3 (E2); (962 + 966) kev, 2.5 × 10−3 (E2); 1179 kev, 6.6 × 10−4 (E1); 1205 kev, 4.6 × 10−4 (E1); 1273 kev, 6.1 × 10−4 (E1); 1315 kev, 3.9 × 10−4 (E1), Relative transition intensities are compared with the predictions of the Unified Model of Bohr and Mottelson and the asymmetric rotor theory of Davydov and Filippov. Transition intensities from the 966-kev level to members of the ground state rotational band suggest the asymmetric rotor interpretation.

OBSERVATION OF THE SPIN 20 LEVEL IN THE GROUND STATE ROTATIONAL BAND OF 158Dy

1971 ◽  
Vol 32 (C6) ◽  
pp. C6-289-C6-290
Author(s):  
P. THIEBERGER ◽  
A. W. SUNYAR ◽  
P. C. ROGERS ◽  
N. LARK ◽  
O. C. KISTNER ◽  
...  
Keyword(s):  
Rotational Band ◽  
Ground State

Electronic spectrum of D2O+

1987 ◽  
Vol 65 (7) ◽  
pp. 739-752 ◽  
Author(s):  
H. Lew ◽  
R. Groleau
Keyword(s):  
Bond Length ◽  
Ground State ◽  
Simple Formula ◽  
Bond Angle ◽  
Spin Rotation ◽  
Type B ◽  
Infrared Band ◽  
Asymmetric Rotor ◽  
Linear Molecules ◽  
Van Vleck

An analysis of 15 bands of the [Formula: see text] system of D2O+ is given. All assigned lines are tabulated. The rotational structures of the [Formula: see text], 1, and 3 levels of the ground state are fitted to the Watson asymmetric rotor Hamiltonian with added spin-rotation terms. For the upper state, the rotational structures of various substates are expressed: for [Formula: see text], in terms of a simple formula for linear molecules; and for [Formula: see text], 2, and 3, in terms of a modified Hill – Van Vleck formula given by Jungen, Hallin, and Merer. From the rotational constants of the ground state, term values are calculated and a small portion of a Type-B infrared band is derived. Some predicted microwave lines are also given. The bond length and bond angle of the molecule in the ground state (ν = 0) are r0 = 0.9987 ± 0.0002 Å and θ0 = 110.17 ± 0.02 deg.

Ground-state rotational band in 181Ta

1976 ◽  
Vol 270 (1) ◽  
pp. 255-268 ◽  
Author(s):  
T. Inamura ◽  
F. Kearns ◽  
G. Varley ◽  
J.C. Lisle
Keyword(s):  
Rotational Band ◽  
Ground State

The +[624] ground state rotational band in 183Os and in the adjacent isotones 181W and 179Hf

1973 ◽  
Vol 217 (3) ◽  
pp. 459-476 ◽  
Author(s):  
Th. Lindblad ◽  
R. Bethoux ◽  
R.H. Price ◽  
P. Kleinheinz
Keyword(s):  
Rotational Band ◽  
Ground State

The analysis of a 2 A 1 - 2 B 1 electronic band system of the AsH 2 and AsD 2 radicals

1968 ◽  
Vol 305 (1481) ◽  
pp. 271-290 ◽  
Keyword(s):  
Excited State ◽  
Ground State ◽  
Flash Photolysis ◽  
Band System ◽  
Valence Angle ◽  
Electronic Transitions ◽  
Doublet State ◽  
Electronic Band ◽  
Asymmetric Rotor ◽  
Asymmetric Top

Two new band systems have been observed in absorption following flash photolysis of AsH 3 and AsD 3 , and are assigned to 2 A 1 - 2 B 1 electronic transitions of AsH 2 and AsD 2 . The origins of both systems are at 19905 cm -1 . The bands have the complex rotational structure associated with an asymmetric rotor. Rotational analyses have been carried out for three bands of the AsH 2 spectrum, leading to the following molecular parameters: ground state, r" 0 = 1.518 Å valence angle = 90° 44'; excited state, r' 0 = 1.48 Å, valence angle = 123° 0'. The parameters associated with rotation about the a inertial axis increase rapidly with increase in v' 2 . The spectrum shows doublet splittings of up to 41 cm -1 , and the excited state furnishes the first example of a doublet state of an asymmetric top molecule which shows substantial departures from Hund’s case ( b ).

On the magnetic hyperfine field at Hf in iron and the gyromagnetic factors g K and g R of the 624 rotational band of 177 Hf

1969 ◽  
Vol 311 (1504) ◽  
pp. 181-184 ◽  
Keyword(s):  
Hyperfine Field ◽  
Rotational Band ◽  
Ground State ◽  
Magnetic Hyperfine Field ◽  
Excited Level ◽  
Internal Field ◽  
Magnetic Hyperfine ◽  
Iron Foil ◽  
Mixing Ratios ◽  
A Value

The induced magnetic hyperfine field acting on 177 Hf nuclei implanted into an iron foil by means of an isotope separator was determined by measuring the integral rotation of the 208-113 keV γ-γ directional correlation. By using the previously known values of the g factor and the lifetime of the 113 keV state of 177 Hf a value of - (286 ± 40) kOe was obtained for the effective internal field. The same source was used to measure the g factor of the 321 keV excited level in 177 Hf, which is the ground state of the K = 9/2 + [624] rotational band. The measurement of the integral rotation of the 105-208 keV cascade yielded the value of g (321) = -0.113 ± 0.038. The combination of the g factor and the M 1/ E 2 mixing ratios of the Δ I = 1 transitions in the [624] rotational band in 177 Hf, which were determined from directional correlation measurements employing Ge(Li) detectors, gave g K = -0.18 ± 0.05 and g R = 0.19 ± 0.05.

Phase Transition in the Ground State Rotational Band of sd Shell Nuclei

1972 ◽  
Vol 6 (5-6) ◽  
pp. 255-258 ◽  
Author(s):  
Amand Faessler ◽  
K Goeke ◽  
H Müther
Keyword(s):  
Phase Transition ◽  
Rotational Band ◽  
Ground State

Zeeman effects in the band System of sulfur dioxide

1976 ◽  
Vol 54 (2) ◽  
pp. 186-196 ◽  
Author(s):  
J. C. D. Brand ◽  
J. L. Hardwick ◽  
D. R. Humphrey ◽  
Y. Hamada ◽  
A. J. Merer
Keyword(s):  
Sulfur Dioxide ◽  
Ground State ◽  
Band System ◽  
Zeeman Effect ◽  
Electronic States ◽  
Vibrational Levels ◽  
Asymmetric Rotor ◽  
Most Probable Explanation ◽  
Rotational Coupling ◽  
Singlet Transition

Bands of the [Formula: see text] system of sulfur dioxide appear as structured absorption superimposed on an apparent continuum. A portion of this System between 3250 and 3000 Å has been recorded in a magnetic field and is found to exhibit a strong Zeeman effect, contrary to expectation for a singlet-singlet transition between bent states of an asymmetric rotor. Line shift and broadening is observed in relatively low fields (< 3 kG), and the spectra become diffuse in fields of ~ 10 kG. The possibility is considered that the magnetic moment in the à state results from rotational coupling of singlet electronic states but it appears unlikely that the angular momentum so developed is sufficient to account for the observations. The most probable explanation of the magnetic sensitivity is that the à state couples with a background of interacting vibrational levels of the ground state and low lying states of the triplet manifold.

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