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Featured researches published by E. Eichler.


Nuclear Physics | 1976

Reduced transition probabilities for high-spin states in 232Th

M.W. Guidry; P. A. Butler; P. Colombani; I.Y. Lee; D. Ward; R.M. Diamond; F.S. Stephens; E. Eichler; Noah R. Johnson; R. Sturm

Abstract The lifetimes and reduced transition probabilities for spins 6 + − 18 + in the ground-state rotational band of 232 Th have been measured by recoil-distance, Doppler-broadened lineshape, and multiple Coulomb excitation methods using 84 Kr and 136 Xe projectiles. Within the limits of experimental uncertainty, transition probabilities from all of the methods are consistent with those of a good rotor for spins 6 + − 18 + . The descrepancy with the prediction of simple β-band mixing and centrifugal stretching models is discussed.


Nuclear Physics | 1962

Nuclear levels of Ge74

E. Eichler; G.D. O'Kelley; R.L. Robinson; J.A. Marinsky; Noah R. Johnson

Abstract By using gamma-ray scintillation spectrometry, radiations from Ga74 and As74 were studied. By means of coincidence techniques, previous level assignments were confirmed and new states were indicated. A decay scheme consistent with most of the results is proposed with levels at 0.598, 1.20, 1.47, 1.71, 2.18, 2.53, 2.95, 3.05, 3.16, 3.33, 3.41, 3.57 and 3.83 MeV. A measurement of the angular correlation between the 0.598 and 0.60 MeV gamma rays confirmed the predominantly E2 character of the 0.60 MeV (2+→2+) transition.


Nuclear Physics | 1968

Decay of 94Tc isomers into the levels of 94Mo

Namik K. Aras; E. Eichler; G. Chilosi

Abstract The energy levels in 94Mo have been investigated from the decay of 94Tc isomers using Ge(Li) and NaI(Tl) detectors. The energies of the gamma rays in keV (and relative intensities) from the decay of 52 min 94mTc are 870.9(100), 993.1(2.6), 1196.3(0.9), 1522.0(5.9) 1868.8(5.8), 2393.0(0.6), 2530.0(0.7), 2740.0(3.8), 3129.2(1.2) and 3793.5(0.1). Gamma-ray energies (and transition intensities) observed in the decay of 5 h 94gTc are 449.0(27), 531.6(1.2), 702.6(100), 742.0(1.1), 849.7(100), 870.9(100), 916.2(6.8), 1509.7(0.7), 1591.8(2.4) and 1764.6(0.2). An angular correlation measurement indicated the presence of a second 2+ state. The results are in partial agreement with the effective interaction calculations of Bhatt and Ball and of Vervier.


Nuclear Physics | 1968

A new measurement of the half-life of the 72Ge 0+ state

E. Eichler; P.H. Stelson; J.K. Dickens

Abstract With a Ge(Li) detector as the target, the half-life of the 0 + first excited state of 72 Ge has been remeasured. A value of 422±13 ns has been obtained.


Nuclear Physics | 1969

Decay of 89Zr and 89mZr and levels of 89Y

E.L. Robinson; R.C. Hagebauer; E. Eichler

Abstract The decay of the 89 Zr isomers has been restudied using Ge(Li) detectors. We observed gamma rays from the 78.0 h ground state with energies in keV (and intensities) of 909.2 (100), 1620.8 (0.071), 1657.3 (0.10), 1712.9 (0.77) and 1744.5 (0.12). Gamma ray energies (and intensities) observed from the decay of 4.16 min 89m Zr are 587.8 (100) and 1507.4 (7.19).


Physics Letters B | 1967

The decay of 94Ru to levels in 94Tc

E. Eichler; G. Chilosi; Noah R. Johnson

Abstract The nucleus 94 Ru decays with a 53 min half-life by electron capture to states in 94 Tc at 474 and 998 keV which de-excite by emitting gamma rays with energies 367.2, 525, and 891.2 keV and relative intensities 100, 2 and 40.


Nuclear Physics | 1969

Decay of 95Tc isomers to levels in 95Mo

G. Chilosi; E. Eichler; Namik K. Aras

Abstract We have studied the decay of the 95Tc isomers with Ge(Li) and NaI detectors. Gamma-ray energies (and intensities) observed from the 20 h ground state decay were 605 (0.1), 765.82 (100), 947.8 (2) and 1074.1 (4) keV. The 60 d isomeric decay revealed 203.94 (100), 219.4 (0.1), 252.9 (1.1), 582.15 (55), 616.5 (2.4), 786.21 (15), 820.65 (8.0), 835.14 (45), 1039.3 (5.0), 1057.0 (0.02), 1222.5 (0.01) and 1620.2 (0.06) keV. A level scheme was constructed with states in 95Mo at 203.94, 765.82, 786.15, 820.65, 947.8, 1039.1, 1057.0, 1074.0, 1222.5, 1553 and 1620.2 keV.


Nuclear Physics | 1967

The 91Zr(d, p)92Zr reaction at Ed = 6.25 MeV

J.K. Dickens; E. Eichler

Abstract The reaction 91 Zr(d, p) 92 Zr has been studied at E d = 6.25 MeV. Energies for 31 levels in 92 Zr were determined, and angular momentum transfer values were obtained for 15 of these levels. The differential cross-section data were compared with distorted-wave calculations, some of which used non-local potentials.


Nuclear Physics | 1969

The decay of 8.8 min 49Ca to levels in 49Sc

G. Chilosi; G. Davis O'Kelley; E. Eichler

Abstract The decay of 8.8 min 49Ca was reinvestigated using a 35 cm3 Ge(Li) detector and a scintillation pair spectrometer. Gamma rays were observed with energies (and intensities) of 2229.0 (0.29), 2372.3 (0.45), 3084.4 (100), 4071.9 (8.0), and 4738.2 (0.30) keV. The large log ft values for decay to the 2229.0 and 2372.3 keV states suggest positive parity assignments and identification as s 1 2 and d 3 2 proton hole states.


Nuclear Physics | 1971

Energy spectrum of delayed neutrons from the spontaneous fission of 252Cf

E.T. Chulick; P.L. Reeder; C.E. Bemis; E. Eichler

Abstract The energy spectrum of delayed neutrons from the spontaneous fission of 252Cf has been measured using a time-of-flight neutron spectrometer. The experimental timing conditions emphasized delayed neutrons of about 2 s half-life. Eleven peaks due to monoenergetic neutrons were observed in the energy range from 95 to 430 keV.

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Noah R. Johnson

Oak Ridge National Laboratory

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R. O. Sayer

Oak Ridge National Laboratory

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D.C. Hensley

Oak Ridge National Laboratory

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G. Davis O'Kelley

Oak Ridge National Laboratory

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Mike Guidry

University of Tennessee

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G.D. O'Kelley

Oak Ridge National Laboratory

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N. C. Singhal

National Science Foundation

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R. J. Sturm

Oak Ridge National Laboratory

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