Delayed muon induced fission of209Bi and the role of meson-exchange currents

Paganetti, H.; David, Peter; Hänscheid, Heribert; Konijn, J.; Laat, C.T.A.M. de; Lourens, W.; Risse, F.; Rösel, Ch.; Schaller, L.A.; Taal, A.

doi:10.1007/bf01291603

Cited by 3 publications

(2 citation statements)

References 32 publications

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“…It has been stressed that the muon absorption process on nucleons correlated by meson-exchange currents (MEC) has also to be taken into account [33]. This calculation has recently been experimentally verified in studying the delayed fission probability of the high fission threshold nucleus 2~ [10]. This calculation has recently been experimentally verified in studying the delayed fission probability of the high fission threshold nucleus 2~ [10].…”

Section: Pfc = ~ I(e) Pf(e) Dementioning

confidence: 92%

“…Therefore, the fission probability Pfc has been evaluated again using (2) by simply shifting the nuclear response function distributions according to the mass differences M(A,Z) -M(A, Z-1) taken from [45,46]. This is in accordance with the result of [10]. Aside model [31 ], which is definitively worse, no preference to the specific models [30,32,36] can be given.…”

Section: Pfc = ~ I(e) Pf(e) Dementioning

confidence: 96%

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The study of prompt and delayed muon induced fission

Rösel

Hänscheid

Hartfiel

et al. 1993

Z. Physik A - Hadrons and Nuclei

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The ratios of prompt to delayed fission yields for the isotopes 233U, 234U, 235U, 236U, 238U, 237Np, 242pu, and 244pu and the fission probabilities relative to each other have been investigated experimentally. Using the value of the total fission probability for 237Np the absolute probabilities for prompt and delayed fission have been determined. The fission probabilities per muon capture P1~ have been derived for all the isotopes and compared with an evaluation based on excitation functions from theory.

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Section: Pfc = ~ I(e) Pf(e) Dementioning

confidence: 92%

Section: Pfc = ~ I(e) Pf(e) Dementioning

confidence: 96%

The study of prompt and delayed muon induced fission

Rösel

Hänscheid

Hartfiel

et al. 1993

Z. Physik A - Hadrons and Nuclei

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Delayed muon induced fission of209Bi and the role of meson-exchange currents

Paganetti

David

Hänscheid

et al. 1992

Z. Physik A - Hadrons and Nuclei

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Multinucleon effects in muon capture onHe3at high energy transfer

et al. 1994

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Energy spectra of both protons and deuterons emitted following the capture of negative muons by He nuclei have been measured for energies above 15 MeV. A limited number of proton-neutron pairs emitted in coincidence were also observed. A simple plane wave impulse approximation (PWIA) model calculation yields fair agreement with the measured proton energy spectra, but underpredicts the measured rate of deuteron production above our energy threshold by a large factor. A more sophisticated PWIA calculation for the two-body breakup channel, based on a realistic three-body wave function for the initial state, is closer to the deuteron data at moderate energies, but still is signi6cantly lower near the kinematic end point. The proton-neutron coincidence data also point to the presence of signi6cant strength involving more than one nucleon in the capture process at high energy transfer. These results indicate that additional terms in the capture matrix element beyond the impulse approximation contribution may be required to explain the experimental data. Speci6cally, the inclusion of nucleon-nucleon correlations in the initial or 6nal state and meson exchange current contributions could bring calculations into better agreement with our data. A fully microscopic calculation would thus open the possibility for a quantitative test of multinucleon effects in the weak interaction.Present address: Stanford Linear Accelerator Center, Stanford, CA 94309.Nuclear muon capture Z+p m (Z -1)'+v"normally leads to the emission of an energetic neutrino carrying most of the rest energy of the muon, while the energy transfer to the nucleus q = m& -E"is relatively small.The transferred energy leads to low-lying excitations of the residual nucleus up to the giant resonant region [1] or to the emission of medium energy neutrons (see, e. g., Ref. [2] and references therein). These conditions can be understood in the impulse approximation (IA) picture, in 0556-2813/94/50(4)/

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Delayed muon induced fission of209Bi and the role of meson-exchange currents

Cited by 3 publications

References 32 publications

The study of prompt and delayed muon induced fission

The study of prompt and delayed muon induced fission

Delayed muon induced fission of209Bi and the role of meson-exchange currents

Multinucleon effects in muon capture onHe3at high energy transfer

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