Lifetime measurements with a new Doppler shift technique

1990 ◽  
Vol 287 (3) ◽  
pp. 487-498 ◽  
Author(s):  
O. Naviliat-Cuncic ◽  
M. Loiselet ◽  
Z. Seres ◽  
J. Vervier
Keyword(s):  
Doppler Shift ◽  
Lifetime Measurements ◽  
Shift Technique

Lifetime measurements for low-lying levels in Hg I and Hg II using the beam-foil technique

1988 ◽  
Vol 66 (11) ◽  
pp. 960-962 ◽  
Author(s):  
E. H. Pinnington ◽  
W. Ansbacher ◽  
J. A. Kernahan ◽  
T. Ahmad ◽  
Z.-Q. Ge
Keyword(s):  
Energy Loss ◽  
Curve Fitting ◽  
Doppler Shift ◽  
Decay Curve ◽  
Carbon Foil ◽  
Lifetime Measurements ◽  
Resonance Transitions ◽  
Shift Technique ◽  
Beam Foil ◽  
Foil Technique

The techniques of beam-foil spectroscopy are applied to obtain measurements of the lifetimes of the 6s6p1P1, 3P1, 6s6d1D2, 3D1, 3D2, and 3D3 levels of Hg I and the 6p2P1/2, 2P3/2, 6d2D3/2, 2D5/2, and 7s2S1/2 levels of Hg II. The energy loss sustained by the ions in passing through the carbon foil is determined using an extended Doppler-shift technique. Constrained curve-fitting and arbitrarily normalized decay curve analyses are used to overcome problems caused by blending between transitions from the 6s6d1D2 and 3D1 levels of Hg I. The f values obtained from the resonance transitions are 1.14 ± 0.04 (Hg I) and 0.648 ± 0.022 (Hg II), in agreement with the trends found previously for higher Z ions in the Hg I and Au I isoelectronic sequences.

Portal Blood Flow as Measured by the Doppler Shift Technique in Sheep Fed Chopped Forages

1975 ◽  
Vol 41 (2) ◽  
pp. 596-600 ◽  
Author(s):  
L. R. Prewitt ◽  
D. R. Jacobson ◽  
R. W. Hemken ◽  
R. H. Hatton
Keyword(s):  
Blood Flow ◽  
Doppler Shift ◽  
Portal Blood Flow ◽  
Portal Blood ◽  
Shift Technique

LIFETIME MEASUREMENTS OF STATES IN O18 AND Ne22

1964 ◽  
Vol 42 (6) ◽  
pp. 1311-1323 ◽  
Author(s):  
M. A. Eswaran ◽  
C. Broude
Keyword(s):  
Excited State ◽  
Ground State ◽  
Doppler Shift ◽  
State Transition ◽  
Branching Ratios ◽  
Ground State Transition ◽  
Lifetime Measurements ◽  
Doppler Shift Attenuation ◽  
First Excited State ◽  
Doppler Shift Attenuation Method

Lifetime measurements have been made by the Doppler-shift attenuation method for the 1.98-, 3.63-, 3.92-, and 4.45-Mev states in O18 and the 1.28-, 3.34-, and 4.47-Mev states in Ne22, excited by the reactions Li7(C12, pγ)O18 and Li7(O16, pγ)Ne22. Branching ratios have also been measured. The results are tabulated.[Formula: see text]The decay of the 3.92-Mev state in O18 is 93.5% to the 1.98-Mev state and 6.5% to the ground state and of the 4.45-Mev state 74% to the 3.63-Mev state, 26% to the 1.98-Mev state, and less than 2% to the ground state. In Ne22, the ground-state transition from the 4.47-Mev state is less than 2% of the decay to the first excited state.

Doppler-shift lifetime measurements of levels in 45Sc and in 46Ti

1983 ◽  
Vol 401 (2) ◽  
pp. 253-268 ◽  
Author(s):  
M. Rahman ◽  
H.P. Nottrodt ◽  
F. Rauch
Keyword(s):  
Doppler Shift ◽  
Lifetime Measurements

Lifetime measurements by the Doppler-shift attenuation method in theSn115(α,nγ)Te118reaction

2011 ◽  
Vol 83 (5) ◽  
Author(s):  
C. Mihai ◽  
A. A. Pasternak ◽  
S. Pascu ◽  
D. Filipescu ◽  
M. Ivaşcu ◽  
...  
Keyword(s):  
Doppler Shift ◽  
Lifetime Measurements ◽  
Doppler Shift Attenuation ◽  
Doppler Shift Attenuation Method

LIFETIME MEASUREMENTS IN 134Pr AND CHIRALITY IN NUCLEI

2006 ◽  
Vol 15 (07) ◽  
pp. 1531-1540 ◽  
Author(s):  
D. TONEV ◽  
P. PETKOV ◽  
D. L. BALABANSKI ◽  
G. DE ANGELIS ◽  
A. GADEA ◽  
...  
Keyword(s):  
Doppler Shift ◽  
Transition Probabilities ◽  
Experimental Results ◽  
Lifetime Measurements ◽  
Evaporation Reaction ◽  
Doppler Shift Attenuation ◽  
Recoil Distance ◽  
Reduced Transition Probabilities ◽  
Fusion Evaporation Reaction

Lifetimes of exited states in 134 Pr were measured be means of the recoil distance Doppler-shift and Doppler-shift attenuation techniques. The experiments were performed at IReS, Strasbourg using the EUROBALL IV spectrometer, in conjunction with the inner BGO ball and the Cologne coincidence plunger apparatus. Exited states in 134 Pr were populated in the fusion-evaporation reaction 119 Sn (19 F , 4 n )134 Pr . Reduced transition probabilities in 134 Pr are compared to the predictions of the two quasiparticle+triaxial rotor and interacting boson fermion-fermion models. The experimental results do not support the presence of static chirality in 134 Pr underlying the importance of shape fluctuations. Only within a dynamical context the presence of intrinsic chirality in 134 Pr can be supported.

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