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Featured researches published by R. M. Ronningen.


Physics Letters B | 1979

Evidence for ground and both neutron and proton rotational aligned bands in 68Ge

A. P. de Lima; J. H. Hamilton; A. V. Ramayya; B. van Nooijen; R. M. Ronningen; H. Kawakami; R. B. Piercey; E. de Lima; R.L. Robinson; H.J. Kim; W.K. Tuttle; L. K. Peker; F.A. Rickey; Rakesh Popli

Abstract From in-beam, γ-ray spectroscopy, the yrast band in 68Ge is found to branch into three positive parity bands at 8+. Bands built on both the yrast 8+ and second 8+ levels show strong backbending in I while the third is apparently a continuation of the ground band. The two lowest 8+ bands provide the first evidence for both proton and neutron rotation-aligned bands built on the same configuration in the one nucleus, here g 9 2 ) 2 . Rotational aligned model calculations confirm these assignments.


Physics Letters B | 1982

Isometric trapping following Coulomb excitation of high spin states in 178Hf

J. H. Hamilton; A. V. Ramayya; R. M. Ronningen; R.O. Sayer; H. Yamada; C. Maguire; P. Colombani; D. Ward; R.M. Diamond; F.S. Stephens; I.Y. Lee; P. A. Butler; D. Habs

Abstract Coulomb excitation of states in 178, 180 Hf has been observed to 16 + and 12 + , respectively, with Kr and Xe ions. A strong up bend in the moment of inertia above the 12 + level is seen in 178 Hf and is well reproduced by cranked shell model calculations. For the first time in Coulomb excitation, population of the lowest K π = 8 - isomer in 178 Hf was observed.


Physical Review C | 1977

E 2 and E 4 reduced matrix elements of Gd154,156,158,160 and Hf176,178,180

R. M. Ronningen; J. H. Hamilton; L. Varnell; J. Lange; A. V. Ramayya; G. Garcia-Bermudez; W. Lourens; L. L. Riedinger; F.K. McGowan; P.H. Stelson; R. L. Robinson; J.L.C. Ford


Physical Review C | 1977

Reduced transition probabilities of vibrational states in /sup 154/ /sup 155/ /sup 156/ /sup 157/ /sup 158/ /sup 159/ /sup 160/Gd and /sup 176/ /sup 177/ /sup 178/ /sup 179/ /sup 180/Hf

R. M. Ronningen; J. H. Hamilton; A. V. Ramayya; L. Varnell; G. Garcia-Bermudez; J. Lange; W. Lourens; L. L. Riedinger; R. L. Robinson; P.H. Stelson; J.L.C. Ford


Physical Review C | 1982

Reduced transition probabilities of vibrational states in /sup 156,158/Dy, /sup 162,164/Er, and /sup 168/Yb

R. M. Ronningen; R. S. Grantham; J. H. Hamilton; R. B. Piercey; A. V. Ramayya; B. van Nooijen; H. Kawakami; W. Lourens; Ronald S. Lee; W. K. Dagenhart; L. L. Riedinger


Physical Review C | 1980

High-spin properties of /sup 164/Er in the multiple band crossing region

S. W. Yates; I.Y. Lee; Noah R. Johnson; E. Eichler; L. L. Riedinger; Mike Guidry; A.C. Kahler; D. Cline; R.S. Simon; P. A. Butler; a. Colombani; F.S. Stephens; R.M. Diamond; R. M. Ronningen; R.D. Hichwa; J. H. Hamilton; E.L. Robinson


Physical Review C | 1977

Coulomb excitation measurements of reduced E 2 and E 4 transition matrix elements in Dy 1 5 6 , 1 5 8 , Er 1 6 2 , 1 6 4 , and Yb 168

R. M. Ronningen; R. B. Piercey; J. H. Hamilton; Charles Maguire; A. V. Ramayya; H. Kawakami; B. van Nooijen; R. S. Grantham; W. K. Dagenhart; L. L. Riedinger


Physical Review C | 1981

Multiple band structures in Ge68

A. P. de Lima; A. V. Ramayya; J. H. Hamilton; B. van Nooijen; R. M. Ronningen; H. Kawakami; R. B. Piercey; E.P. de Lima; R. L. Robinson; H.J. Kim; L. K. Peker; F. A. Rickey; Rakesh Popli; A. J. Caffrey; J. C. Wells


Physical Review C | 1981

Multiple band structures in /sup 68/Ge

A.P. de Lima; A. V. Ramayya; J. H. Hamilton; B. van Nooijen; R. M. Ronningen; c. Kawakami; R. B. Piercey; E.P. de Lima; R. L. Robinson; H.J. Kim; L. K. Peker; F. A. Rickey; Rakesh Popli; A. J. Caffrey; J. C. Wells


Physical Review C | 1977

High-spin states in Ge70

R. L. Robinson; H.J. Kim; R. O. Sayer; J. C. Wells; R. M. Ronningen; J. H. Hamilton

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J. C. Wells

Tennessee Technological University

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R. L. Robinson

Oak Ridge National Laboratory

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H.J. Kim

Oak Ridge National Laboratory

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L. K. Peker

Brookhaven National Laboratory

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