Anomalous two-neutron transfer cross sections at large separation in heavy ion reactions

Juutinen, S.; Liu, X.T.; Sorensen, Soren Pontoppidan; Cox, B.; Kincaid, R.W.; Bingham, C. R.; Guidry, Mike; Kernan, W.J.; Wu, C. Y.; Vogt, E.G.; Czosnyka, T.; Cline, D.; Halbert, M.L.; Lee, I.Y.; Baktash, C.

doi:10.1016/0370-2693(87)90111-0

Cited by 39 publications

(24 citation statements)

References 6 publications

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“…In more recent studies of lighter systems, in which reactions of 58Ni and 116Sn projectiles with Dy targets [3,4] were investigated, similar small radial slopes of the transfer probability were observed. According to those authors the observed behavior in their systems is due to a critical dependence of the slope on the angular momentum to the states excited in the transfer process, rather than to intrinsic excitations of the reaction fragments.…”

Section: Introductionmentioning

confidence: 56%

Inelastic scattering and nucleon transfer in the system232Th+206Pb near the Coulomb barrier

Eckert

Stelzer

Nelson

et al. 1992

Z. Physik A - Hadrons and Nuclei

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Nucleon transfer accompanied by Coulomb excitation was studied in the system 2~ at EL~b=6.4 MeV/u. Particle-particle-gamma coincidence techniques were used to identify excited states of reaction products populated through inelastic scattering and nucleon transfer reactions. The mean excitation energy was measured by means of a y-ray energy and multiplicity filter consisting of 6 NaI detectors. Large cross sections for one-neutron and two-neutron pick-up from 232Th are observed. The impact-parameter dependence of the neutron transfer is analyzed in terms of semiclassical barrier penetration models. Using realistic neutron potentials with a diffuse surface, the experimental data are in accordance with the assumption of a "cold" transfer to states near the yrast line.

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Section: Introductionmentioning

confidence: 56%

Inelastic scattering and nucleon transfer in the system232Th+206Pb near the Coulomb barrier

Eckert

Stelzer

Nelson

et al. 1992

Z. Physik A - Hadrons and Nuclei

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“…The most significant of these problems is the origin of the strong enhancement of the 2n transfer compared to the i n transfer, observed whenever one of the reaction partners is well deformed [-e.g. 1,3,9,10]. This finding suggests the nucleon-nucleon correlations, in particular the pairing correlation to be the reason.…”

Section: Introductionmentioning

confidence: 71%

“…By employing the same conditions on the 7-sumenergy -7-multiplicity plane as stated in [10] no significant effect turned up for the 2n nor for the 1 n pick-up channel. Even more stringent conditions on the uniformity of the excitation energy above the yrast line did not reveal a dependence of the form factor slopes on the 7-multiplicity.…”

Section: C) Cross Sections and Form Factor Slopesmentioning

confidence: 88%

“…In a recent reference [10] an increase of the 2n form factor slopes with increasing 7-multiplicity respectively angular momentum was reported for several transfer reactions involving 58Ni and 116Sn projectiles and a62'164Dy targets. For angular momenta beyond that available from Coulomb excitation the penetration factor was extrapolated to approach the value K2,--2K1,, while it showed the slope anomaly at low spins.…”

Section: C) Cross Sections and Form Factor Slopesmentioning

confidence: 94%

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Spectroscopy and reaction mechanism of the system90Zr?232Th in the vicinity of the Coulomb barrier

Gerl

Körten

Habs

et al. 1989

Z. Physik A - Atomic Nuclei

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“…Few-nucleon transfer experiments combine the selectivity of studying one-and two-particle correlations with the selectivity of Coulomb excitation to add a new dimension to the study of nuclear structure [IS]. Many experiments have been performed in the rareearth region (cf [19], [20], [21], [22], [23], [24], [25], [26]), some in the actinides (cf…”

Section: Introductionmentioning

confidence: 99%

In-beam studies of high-spin states of actinide nuclei

Stoyer

1990

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High-spin states in the actinides have been studied using Coulomb-excitation, inelastic excitation reactions, and one-neutron transfer reactions. Experimental data are presented for states in 232U, 233U 7 -234U 7 235U, 2 3 8 P~ and 2 3 9 P~ from a variety of reactions. Energy levels, moments-of-inertia, aligned angular momentum, Routhians, gamma-ray intensities, and cross-sections are presented MI for most cases. Additional spectroscopic information (magnetic moments, mixing ratios, and g-factors) is presented for 233U. One-and two-neutron transfer reaction mechanisms and the possibility of band crossings (backbending) are discussed. A discussion of odd-A band fitting and Cranking calculations is presented to aid in the interpretation of rotational energy levels and alignment. In addition, several theoretical calculations of rotational populations for inelastic excitation and neutron transfer are compared to the data. Intratheory comparisons between the Sudden Approximation, Semi-Classical, and Alder-Winther-DeBoer methods are made. In connection with the theory development, the possible signature for the nuclear SQUID effect is discussed. DedicationThis thesis would have been impossible without the support of the following people:(1) To all those many people I've had the fortune of interacting with during my learningexperiences while performing this and related work-too many to acknowledge individually, but certainly not forgotten.(2) To Dr. Richard A. Meyer who welcomed me to my first job in Nuclear Chemistry, pointed me in the right direction at Berkeley, and whom I consider a good friend.(3) To my brother, Dale, who first provoked in me the curiousity of a scientist; to my new sister-in-law, Janice, whose only connection with this thesis was a concern that I not recite it at her wedding; and to my parents, Lyn and Dorothy, who, though it is probably still somewhat of a mystery to them, nevertheless gave me the support and encouragement to "do whatever it is I do".(4) And lastly, to Dr. John Rasmussen, whom it has been an honor to work for during my graduate studies. His patience, kindness, creativity, and guidance have been generous during my stay at LBL, and I am eternally in his debt. Acknowledgements

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Anomalous two-neutron transfer cross sections at large separation in heavy ion reactions

Cited by 39 publications

References 6 publications

Inelastic scattering and nucleon transfer in the system232Th+206Pb near the Coulomb barrier

Inelastic scattering and nucleon transfer in the system232Th+206Pb near the Coulomb barrier

Spectroscopy and reaction mechanism of the system90Zr?232Th in the vicinity of the Coulomb barrier

In-beam studies of high-spin states of actinide nuclei

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