Author
C.C. Hsu
Bio: C.C. Hsu is an academic researcher from University of California, Berkeley. The author has contributed to research in topics: Angular momentum & Multiplicity (chemistry). The author has an hindex of 5, co-authored 8 publications receiving 87 citations.
Papers
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TL;DR: In-and out-of-plane angular distributions have been measured for sequential α-decay from target-like fragments produced in fully relaxed heavy-ion collisions in this article.
20 citations
TL;DR: In this paper, the magnitude and alignment of the transferred angular momentum in the reaction {sup 165}Ho + [sup 165]Ho have been measured as a function of Q value via continuum {gamma}-ray multiplicity and anisotropy techniques.
Abstract: Both the magnitude and alignment of the transferred angular momentum in the reaction {sup 165}Ho + {sup 165}Ho have been measured as a function of Q value via continuum {gamma}-ray multiplicity and anisotropy techniques. Two regimes are observed: A low-Q-value regime where the aligned angular momentum component dominates over the random components, and a large-Q-value regime where the random components dominate and decrease the spin alignment.
18 citations
TL;DR: In this article, out-of-plane angular distributions have been measured for sequential alpha decay from target-like fragments produced in fully damped heavy-ion collisions Fragment spins were extracted from the angular distributions as a function of mass asymmetry.
Abstract: Out-of-plane angular distributions have been measured for sequential alpha decay from target-like fragments produced in fully damped heavy-ion collisions Fragment spins were extracted from the angular distributions as a function of mass asymmetry These spins are in agreement with those obtained from a simultaneous gamma-ray multiplicity measurement Both the fragment kinetic energies and intrinsic spins are consistent with rigid rotation of an intermediate complex consisting of two substantially deformed spheroids
15 citations
TL;DR: In this article, the in-plane and out-of-plane anisotropy was measured for gamma rays in coincidence with deep-inelastic products from the 1064-MeV /sup 136/Xe+/sup 197/Au reaction.
Abstract: The in-plane and out-of-plane anisotropy has been measured for ..gamma.. rays in coincidence with deep-inelastic products from the 1064-MeV /sup 136/Xe+/sup 197/Au reaction. The ..gamma..-ray energy spectra exhibit a bump corresponding to a dominantly stretched-E2 cascade, but only a small out-of-plane anisotropy, indicating a misalignment of the fragment spins. A simple model is used to extract a rms misalignment angle of 34/sup 0/ +- 7/sup 0/.
14 citations
TL;DR: In this paper, the average magnitude and alignment of the intrinsic spin of the heavy partner from the reaction of 252 MeV 20 Ne with 197 Au and 238 U were determined as a function of Q-value.
12 citations
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TL;DR: In this article, the angular momentum in damped nuclear reactions is investigated in a model considering the stochastic exchange of individual nucleons between the two reactants, and the equations of motion for the first and second moments of the distribution function are derived starting from a general transport description of the dynamical evolution of the macroscopic variables.
91 citations
TL;DR: Gamma spectroscopic studies exploiting deep-inelastic heavy-ion reactions in thick target experiments are reviewed in this paper, where the authors describe physical motivation, history of early experiments, analysis of the N/Z equilibration process as well as the outline of the experimental method and data analysis are presented.
Abstract: Gamma spectroscopic studies exploiting deep-inelastic heavy-ion reactions in thick target experiments are reviewed. The description of physical motivation, history of early experiments, analysis of the N/Z equilibration process as well as the outline of the experimental method and data analysis are followed by the presentation of main results obtained in various regions of the nuclide chart. Brief comments on thin target spectroscopy experiments involving fragment detection and future outlook are summarized.
56 citations
TL;DR: In this paper, the Coulomb proximity effects are observed in the three-body final state of fission, which, treated quantitatively in Coulomb trajectory calculations, establish a time-scale of 1·10−21 s between the consecutive scission acts.
Abstract: Kinematically complete experiments have been performed on the two- and three-body exit channels in the reactions84Kr+166Er and129Xe+122Sn at 125 MeV/u Three-body events occur with an unusually high probability They arise from a fast two-step mechanism where a sequential fission-like process follows a deep inelastic collision with preferentially very large energy losses Strong Coulomb proximity effects are observed in the three-body final state which, treated quantitatively in Coulomb trajectory calculations, establish a time-scale of 1·10−21 s between the consecutive scission acts The angular distribution of fission fragments is consistent with an orientation of the fission axis approximately collinear with the axis of the first scission, and the mass distribution of the fission is asymmetric with the heavier mass emitted preferentially opposite to the direction of the third particle The high fission probability, the short time-scale, the near collinear orientation and the fission mass asymmetry together present consistent evidence for a new phenomenon of non-equilibrium fission
53 citations
TL;DR: In this paper, a two-sphere model is developed for the thermal excitation of spin-depolarizing modes in mass asymmetric heavy-ion systems, and the effect of these modes on the spin distributions and the spin alignment of the fragments is investigated.
38 citations