K-shell ionization in 7.5- and 8.6-MeV/a.m.u. U+U collisions at very small impact parameters

Molitoris, J. D.; Stoller, Ch.; Anholt, R.; Meyerhof, W. E.; Spooner, D. W.; McDonald, R. J.; Sobotka, L. G.; Wozniak, G. J.; Moretto, L. G.; McMahan, M. A.; Morenzoni, E.; Nessi, M.; Wölfli, W.

doi:10.1007/bf01438230

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…the spectra summed over the entire detected TKEL range. In the two-body spectrum (a), one sees U K x rays and Coulomb excited gamma rays from 238 U, both Doppler broadened [11]. Spectra (not shown) gated by TKEL bins indicate only U K x rays, which is consistent with the finding [10] that any higher-Z product dominantly fissions.…”

Section: Figsupporting

confidence: 85%

Molecular-orbital study of late-fission times in deep-inelasticU238+

et al. 1993

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The U-like AT-vacancy production probability in 7.5-MeV/nucleon deep-inelastic 238 U4-238 U collisions has been measured for no-fission, single-fission, and double-fission exit channels. The results are interpreted using quasimolecular orbital correlations for diatomic and triatomic configurations. This leads to the determination of lower limits for the time scale for late fission of U~like products (> 8 and > 4 as) and their probability (> 77% and > 52%), at mean initial-excitation energies of -40 and -105 MeV, respectively. PACS numbers: 25.70.Lm, 21.10.Tg, 25.85.Ge, 34.50.Fa PPAC FIG. details. 1. Schematic of the experimental setup. See text for

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Section: Figsupporting

confidence: 85%

Molecular-orbital study of late-fission times in deep-inelasticU238+

et al. 1993

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Time delay effects onKx-ray production probability in deep inelastic U + U and U + Pb nuclear reactions

Nessi¹,

Stoller²,

Morenzoni³

et al. 1987

Phys. Rev. C

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If an atomic collision is accompanied by a deep inelastic nuclear reaction with a time delay hT, a phase change which affects the ionization probability I'z of the targetand projectile-like products is introduced between the incident and outgoing ionization amplitudes.In a deep inelastic nuclear reaction, the nuclear reaction time Is. T is monotonically related to the total kinetic energy loss ( -Q) of the reaction products. Therefore a measurement of Pz as a function of Q then yields hT. The IC shell ionization probability P& has been measured in the deep inelastic reactions U + U and U + Pb at a beam energy of 1785 MeV as a function of the total kinetic energy loss -Q. Ps was determined for Q values down to -190 MeV. After subtraction of the ionization induced by the internal conversion of y rays, a strongly Q-dependent Pr. is found, in qualitative agreement with theoretical predictions.From the data we infer a nuclear reaction time of approximately 1 X 10 ' s at Q = -100 MeV. The observed reaction times agree fairly well with the predictions of the classical nuclear reaction models used to describe deep inelastic scattering processes.

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K-shell ionization in 7.5- and 8.6-MeV/a.m.u. U+U collisions at very small impact parameters

Cited by 2 publications

References 17 publications

Molecular-orbital study of late-fission times in deep-inelasticU238+

Molecular-orbital study of late-fission times in deep-inelasticU238+

Time delay effects onKx-ray production probability in deep inelastic U + U and U + Pb nuclear reactions

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