Probabilities of muon induced nuclear reactions involving charged particle emission

Wytténbach, A.; Baertschi, P.; Bajo, S.; Hadermann, J.; Junker, K.; Katcoff, S.; Hermes, E.A.; Pruys, H.

doi:10.1016/0375-9474(78)90218-x

Cited by 40 publications

(25 citation statements)

References 20 publications

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“…These numbers are close to the corresponding theoretical predictions of 0.040 and 0.012 [13]. Radioisotope yields for muon capture on aluminum are reported in [21] and [22] as 0.028 ± 0.004 for the final state consistent with (pn) emission, and 0.035 ± 0.008 for (p2n). Note that the activation measurement technique can not distinguish separate p and n particles from a deuteron.…”

Section: Resultssupporting

confidence: 87%

Charged-particle spectra fromμ−capture on Al

et al. 2020

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Published data on the emission of charged particles following nuclear muon capture are extremely limited. In addition to its interest as a probe of the nuclear response, these data are important for the design of some current searches for lepton flavor violation. This work presents momentum spectra of protons and deuterons following µ − capture in aluminum. It is the first measurement of a muon capture process performed with a tracking spectrometer. A precision of better than 10% over the momentum range of 100-190 MeV/c for protons is obtained; for deuterons of 145-250 MeV/c the precision is better than 20%. The observed partial yield of protons with emission momenta above 80 MeV/c (kinetic energy 3.4 MeV) is 0.0322 ± 0.0007(stat) ± 0.0022(syst) per capture, and for deuterons above 130 MeV/c (4.5 MeV) it is 0.0122 ± 0.0009(stat) ± 0.0006(syst). Extrapolating to total yields gives 0.045 ± 0.001(stat) ± 0.003(syst) ± 0.001(extrapolation) per capture for protons and 0.018±0.001(stat)±0.001(syst)±0.002(extrapolation) for deuterons, which are the most precise measurements of these quantities to date. * gandr@fnal.gov † Affiliated with:

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Section: Resultssupporting

confidence: 87%

Charged-particle spectra fromμ−capture on Al

et al. 2020

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“…However it is much stronger here (and at the right energy), so we believe it is mainly from muon capture [e.g., 56 Fe(µ − ,νpn) 54 Cr]. The yield is a little higher than the 2% expected from the systematics of the (µ − ,νpn) reaction, as measured by activation techniques [46], but individual nuclides vary quite markedly.…”

Section: Nuclidementioning

confidence: 88%

γ rays from muon capture in natural Ca, Fe, and Ni

Measday

Stocki

2006

Phys. Rev. C

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A significant improvement has been made in the identification of γ rays from muon capture in natural Ca, and to a lesser extent for Fe and Ni. For calcium, capture was observed in 44 Ca and even 42 Ca, as well as the dominant 40 Ca. The (µ − , ν) reaction was clearly observed in 40 Ca, but, as in the past, no clear identification was made in Fe and Ni. The (µ − , νn) reaction was clearly observed in all nuclei, and the γ rays observed correspond better to the (γ, p) reaction than to spectroscopic factors from the (d, 3 He) or (t, α) reactions. Some (µ − , ν2n) and other reactions have been observed at a lower yield.

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“…In this discussion, we shall simply focus on the overall yields for each reaction. To roimd out the table we have added the data of Heusser and Kirsten [6] for '^i, adding estimates for the charged particle reactions from Wyttenbach et al [7]. However by comparing with similar reactions, we can make an intelligent estimate.…”

Section: Muon Capture Resultsmentioning

confidence: 99%

“…However by comparing with similar reactions, we can make an intelligent estimate. Again we have added estimates for the charged particle reactions from Wyttenbach et al [7]. For the ^Z(|i , vn) reaction, the (y, p) reaction is very similar.…”

Section: Muon Capture Resultsmentioning

confidence: 99%

Comparison of Muon Capture in Light and in Heavy Nuclei

Measday¹,

Stocki

2007

AIP Conference Proceedings

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We have recently completed an experimental study at TRIUMF of muon capture in the following elements, N, Al, Si, Ca, Fe, Ni, I, Au, and Bi. We detected the nuclear gamma rays emitted by the product nuclei after muon capture. The energy of the gamma ray identifies the source nuclide, and thus the reaction which has occurred. Our data are of better quality, and more comprehensive than any other data set in the literature. The (\i^, vn) reaction is always dominant. In light nuclei, reactions such as (\i^, vp) and (\i^, vpn) can occur, but not for heavy nuclei. However the reverse is true for reactions such as (\r, v3n) and (\i^, v4n), which are very rare in light nuclei, but easily detected in heavy elements. We shall discuss how such information can be useful in calculations of neutrino-nucleus interactions, and of electron-capture in supernovae.

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Probabilities of muon induced nuclear reactions involving charged particle emission

Cited by 40 publications

References 20 publications

Charged-particle spectra fromμ−capture on Al

Charged-particle spectra fromμ−capture on Al

γ rays from muon capture in natural Ca, Fe, and Ni

Comparison of Muon Capture in Light and in Heavy Nuclei

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